From f4a003d3555802efdc5a0ecf3249470f761f3b05 Mon Sep 17 00:00:00 2001 From: Jason Witty Date: Sat, 15 Aug 2026 17:47:58 -0700 Subject: [PATCH] [feat] plugin: AI summary of search results from a self-hosted LLM Adds an optional plugin that shows a generated summary above the search results, similar to the answer boxes in Brave and Google. The text is produced by an LLM server the administrator runs, reached over the OpenAI chat completions API, so queries never leave the operator's own network. The summary is grounded on the top search results rather than the model's training data. It is generated asynchronously: post_search adds an empty placeholder and returns, and the browser fills it from the /ai_summary endpoint, which streams the answer as NDJSON. No summary is generated beyond page one, outside the general category, for non-HTML formats, or when an engine already answered with an infobox or an instant answer. The client side follows the existing plugin pattern: one file in client/simple/src/js/plugin/, one conditional load in router.ts, one LESS import. No build configuration changes and no new dependencies. The plugin is not activated by default. Instance defaults live in an ai_summary: section; the server, model, API key and grounding are user preferences, and all four can be locked. Signed-off-by: Jason Witty --- AUTHORS.rst | 1 + client/simple/src/js/plugin/AiSummary.ts | 223 +++++++ client/simple/src/js/router.ts | 7 + client/simple/src/less/ai_summary.less | 90 +++ client/simple/src/less/preferences.less | 6 +- client/simple/src/less/style.less | 1 + docs/admin/settings/index.rst | 1 + docs/admin/settings/settings_ai_summary.rst | 171 ++++++ docs/dev/plugins/ai_summary.rst | 103 ++++ docs/dev/plugins/builtins.rst | 1 + searx/_settings.py | 3 + searx/ai_summary.py | 135 +++++ searx/plugins/_core.py | 2 +- searx/plugins/ai_summary.py | 386 ++++++++++++ searx/preferences.py | 29 +- searx/result_types/__init__.py | 4 +- searx/result_types/answer.py | 28 +- searx/settings.yml | 31 + searx/settings_defaults.py | 2 + .../themes/simple/chunk/Bc8fcwWx.min.js | 8 - .../themes/simple/chunk/BfLIj3Of.min.js | 15 - .../themes/simple/chunk/BnnvKC7b.min.js | 8 + ...c8fcwWx.min.js.map => BnnvKC7b.min.js.map} | 2 +- .../themes/simple/chunk/BuurKv-k.min.js | 2 - .../themes/simple/chunk/BuurKv-k.min.js.map | 1 - .../themes/simple/chunk/C8c7HJzp.min.js | 15 + ...fLIj3Of.min.js.map => C8c7HJzp.min.js.map} | 2 +- .../themes/simple/chunk/D3mcqWOe.min.js | 2 - .../themes/simple/chunk/DBBLNmaq.min.js | 4 + .../themes/simple/chunk/DBBLNmaq.min.js.map | 1 + .../themes/simple/chunk/DpvWr1cn.min.js | 2 + ...3mcqWOe.min.js.map => DpvWr1cn.min.js.map} | 2 +- searx/static/themes/simple/manifest.json | 26 +- searx/static/themes/simple/sxng-core.min.js | 4 +- .../static/themes/simple/sxng-core.min.js.map | 2 +- searx/static/themes/simple/sxng-ltr.min.css | 2 +- searx/static/themes/simple/sxng-rtl.min.css | 2 +- searx/templates/simple/answer/ai_summary.html | 19 + searx/templates/simple/preferences.html | 12 + .../simple/preferences/ai_summary.html | 72 +++ searx/webapp.py | 13 + tests/unit/test_plugin_ai_summary.py | 563 ++++++++++++++++++ tests/unit/test_preferences.py | 2 +- 43 files changed, 1951 insertions(+), 54 deletions(-) create mode 100644 client/simple/src/js/plugin/AiSummary.ts create mode 100644 client/simple/src/less/ai_summary.less create mode 100644 docs/admin/settings/settings_ai_summary.rst create mode 100644 docs/dev/plugins/ai_summary.rst create mode 100644 searx/ai_summary.py create mode 100644 searx/plugins/ai_summary.py delete mode 100644 searx/static/themes/simple/chunk/Bc8fcwWx.min.js delete mode 100644 searx/static/themes/simple/chunk/BfLIj3Of.min.js create mode 100644 searx/static/themes/simple/chunk/BnnvKC7b.min.js rename searx/static/themes/simple/chunk/{Bc8fcwWx.min.js.map => BnnvKC7b.min.js.map} (82%) delete mode 100644 searx/static/themes/simple/chunk/BuurKv-k.min.js delete mode 100644 searx/static/themes/simple/chunk/BuurKv-k.min.js.map create mode 100644 searx/static/themes/simple/chunk/C8c7HJzp.min.js rename searx/static/themes/simple/chunk/{BfLIj3Of.min.js.map => C8c7HJzp.min.js.map} (87%) delete mode 100644 searx/static/themes/simple/chunk/D3mcqWOe.min.js create mode 100644 searx/static/themes/simple/chunk/DBBLNmaq.min.js create mode 100644 searx/static/themes/simple/chunk/DBBLNmaq.min.js.map create mode 100644 searx/static/themes/simple/chunk/DpvWr1cn.min.js rename searx/static/themes/simple/chunk/{D3mcqWOe.min.js.map => DpvWr1cn.min.js.map} (97%) create mode 100644 searx/templates/simple/answer/ai_summary.html create mode 100644 searx/templates/simple/preferences/ai_summary.html create mode 100644 tests/unit/test_plugin_ai_summary.py diff --git a/AUTHORS.rst b/AUTHORS.rst index 23d8d6db6..6bcc3ba92 100644 --- a/AUTHORS.rst +++ b/AUTHORS.rst @@ -179,3 +179,4 @@ features or generally made SearXNG better: - Tommaso Colella `` - @AgentScrubbles - Filip Mikina `` +- Jason Witty `` diff --git a/client/simple/src/js/plugin/AiSummary.ts b/client/simple/src/js/plugin/AiSummary.ts new file mode 100644 index 000000000..c946b3149 --- /dev/null +++ b/client/simple/src/js/plugin/AiSummary.ts @@ -0,0 +1,223 @@ +// SPDX-License-Identifier: AGPL-3.0-or-later + +import { Plugin } from "../Plugin.ts"; +import { settings } from "../toolkit.ts"; +import { assertElement } from "../util/assertElement.ts"; + +type Message = { role: "user" | "assistant"; content: string }; +type ContextItem = { title: string; url: string; snippet: string }; +type StreamLine = { delta?: string; done?: boolean; model?: string; error?: string }; + +// keep in sync with the server side defaults (searx/ai_summary.py) +const MAX_CONTEXT_ITEMS = 5; +const MAX_HISTORY_MESSAGES = 12; +const MAX_TITLE_LENGTH = 300; +const MAX_SNIPPET_LENGTH = 1000; + +/** + * Fills the AI summary placeholder (rendered by the ai_summary plugin of the + * server) by streaming an answer from the /ai_summary endpoint, with an + * expand button and a follow-up question chat. + */ +export default class AiSummary extends Plugin { + private readonly messages: Message[] = []; + private context: ContextItem[] = []; + private controller: AbortController | undefined; + + public constructor() { + super("ai_summary"); + } + + protected async run(): Promise { + const box = document.getElementById("ai_summary"); + if (!box) return; + + try { + const { query } = box.dataset; + if (!query) return; + + if (box.dataset.grounding === "1") { + this.context = AiSummary.collectContext(); + } + + this.wireControls(box); + + this.messages.push({ role: "user", content: query }); + await this.exchange(box); + } catch (error) { + // never fail silently, always leave a message in the summary box + AiSummary.showError(box, error); + } + } + + protected async post(): Promise { + // noop + } + + /** + * Scrape the top search results from the DOM as grounding context. + */ + private static collectContext(): ContextItem[] { + const items: ContextItem[] = []; + for (const article of document.querySelectorAll("#urls article.result")) { + if (items.length >= MAX_CONTEXT_ITEMS) break; + + const link = article.querySelector("h3 a"); + if (!link) continue; + + items.push({ + title: (link.textContent ?? "").trim().slice(0, MAX_TITLE_LENGTH), + url: link.href, + snippet: (article.querySelector(".content")?.textContent ?? "").trim().slice(0, MAX_SNIPPET_LENGTH) + }); + } + return items; + } + + private wireControls(box: HTMLElement): void { + const body = box.querySelector(".ai-summary-body"); + const moreButton = box.querySelector(".ai-summary-more"); + const followupForm = box.querySelector(".ai-summary-followup"); + assertElement(body); + assertElement(moreButton); + assertElement(followupForm); + + moreButton.addEventListener("click", () => { + const collapsed = body.classList.toggle("collapsed"); + moreButton.textContent = collapsed + ? (moreButton.dataset.btnTextCollapsed ?? "") + : (moreButton.dataset.btnTextNotCollapsed ?? ""); + followupForm.classList.toggle("invisible", collapsed); + }); + + followupForm.addEventListener("submit", (event: Event) => { + event.preventDefault(); + + const input = followupForm.querySelector("input"); + assertElement(input); + + const question = input.value.trim(); + if (!question || this.controller) return; + + input.value = ""; + this.messages.push({ role: "user", content: question }); + // the server rejects too long histories, drop the oldest messages + this.messages.splice(0, this.messages.length - (MAX_HISTORY_MESSAGES - 1)); + + const questionElement = Object.assign(document.createElement("p"), { + textContent: question, + className: "ai-summary-question" + }); + box.querySelector(".ai-summary-answers")?.append(questionElement); + + void this.exchange(box); + }); + } + + /** + * Send the message history to /ai_summary and stream the answer into a new + * block in the answer area. + */ + private async exchange(box: HTMLElement): Promise { + const answers = box.querySelector(".ai-summary-answers"); + assertElement(answers); + + const block = Object.assign(document.createElement("p"), { + className: "ai-summary-content typing" + }); + answers.append(block); + + const controller = new AbortController(); + this.controller = controller; + + let text = ""; + const handleLine = (line: string): void => { + if (!line.trim()) return; + + const data = JSON.parse(line) as StreamLine; + if (data.error) { + throw new Error(data.error); + } + if (data.delta) { + text += data.delta; + block.textContent = text; + this.updateMoreButton(box); + } + if (data.done && data.model) { + const modelElement = box.querySelector(".ai-summary-model"); + if (modelElement) modelElement.textContent = data.model; + } + }; + + try { + const res = await fetch("./ai_summary", { + method: "POST", + headers: { "Content-Type": "application/json" }, + body: JSON.stringify({ messages: this.messages, context: this.context }), + signal: controller.signal + }); + if (!res.ok) { + // the status is shown to the user: it is often the only thing + // available to diagnose a failure on a device without dev tools + throw new Error(`HTTP ${res.status}`); + } + + if (res.body) { + const reader = res.body.getReader(); + const decoder = new TextDecoder(); + let buffer = ""; + + for (;;) { + // biome-ignore lint/performance/noAwaitInLoops: chunks of a stream are read sequentially + const { done, value } = await reader.read(); + if (done) break; + + buffer += decoder.decode(value, { stream: true }); + const lines = buffer.split("\n"); + buffer = lines.pop() ?? ""; + for (const line of lines) handleLine(line); + } + handleLine(buffer); + } else { + // some webviews (e.g. Brave iOS) wrap fetch and don't expose a + // streaming body: no typing effect, render the answer in one go + const body = await res.text(); + for (const line of body.split("\n")) handleLine(line); + } + this.messages.push({ role: "assistant", content: text }); + } catch (error) { + AiSummary.showError(box, error); + } finally { + block.classList.remove("typing"); + this.controller = undefined; + this.updateMoreButton(box); + } + } + + private static showError(box: HTMLElement, error: unknown): void { + console.error("Error loading AI summary:", error); + + const message = settings.translations?.error_loading_ai_summary ?? "Error loading the AI summary"; + const reason = error instanceof Error && error.message ? ` (${error.message})` : ""; + + const errorElement = Object.assign(document.createElement("div"), { + textContent: `${message}${reason}`, + className: "dialog-error" + }); + errorElement.setAttribute("role", "alert"); + (box.querySelector(".ai-summary-answers") ?? box).append(errorElement); + } + + /** + * Show the expand button as soon as the (collapsed) body overflows. + */ + private updateMoreButton(box: HTMLElement): void { + const body = box.querySelector(".ai-summary-body"); + const moreButton = box.querySelector(".ai-summary-more"); + if (!(body && moreButton)) return; + + if (!body.classList.contains("collapsed") || body.scrollHeight > body.clientHeight + 4) { + moreButton.classList.remove("invisible"); + } + } +} diff --git a/client/simple/src/js/router.ts b/client/simple/src/js/router.ts index 24abb64c3..46fd710b2 100644 --- a/client/simple/src/js/router.ts +++ b/client/simple/src/js/router.ts @@ -34,6 +34,13 @@ ready(() => { where: [Endpoints.results] }); } + + if (settings.plugins?.includes("ai_summary")) { + load(() => import("./plugin/AiSummary.ts").then(({ default: Plugin }) => new Plugin()), { + on: "endpoint", + where: [Endpoints.results] + }); + } }); ready( diff --git a/client/simple/src/less/ai_summary.less b/client/simple/src/less/ai_summary.less new file mode 100644 index 000000000..a3d6ced6e --- /dev/null +++ b/client/simple/src/less/ai_summary.less @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: AGPL-3.0-or-later + +@keyframes ai-summary-caret { + 50% { + opacity: 0; + } +} + +.ai-summary { + display: flex; + flex-direction: column; + gap: 0.5rem; + + .ai-summary-header { + display: flex; + align-items: baseline; + gap: 0.5rem; + + .ai-summary-title { + font-size: 0.9em; + font-weight: bold; + text-transform: uppercase; + letter-spacing: 0.05em; + } + + .ai-summary-model { + font-size: 0.8em; + opacity: 0.7; + } + } + + .ai-summary-body.collapsed { + max-height: 8em; + overflow: hidden; + mask-image: linear-gradient(to bottom, #000 60%, transparent 100%); + } + + .ai-summary-answers { + display: flex; + flex-direction: column; + gap: 0.5rem; + } + + .ai-summary-content { + margin: 0; + white-space: pre-line; + overflow-wrap: anywhere; + + &.typing::after { + content: "▍"; + animation: ai-summary-caret 1s step-end infinite; + } + } + + .ai-summary-question { + margin: 0; + font-weight: bold; + } + + .ai-summary-more { + align-self: center; + border: none; + .show-content-button(); + } + + .ai-summary-followup { + display: flex; + gap: 0.5rem; + + input { + flex: 1; + padding: 5px 10px; + border: 1px solid var(--color-sidebar-border); + background: var(--color-answer-background); + color: var(--color-answer-font); + .rounded-corners-tiny; + } + + button { + border: none; + .show-content-button(); + } + } + + .ai-summary-disclaimer { + margin: 0; + font-size: 0.8em; + opacity: 0.7; + } +} diff --git a/client/simple/src/less/preferences.less b/client/simple/src/less/preferences.less index f476fe45f..7a063fc8e 100644 --- a/client/simple/src/less/preferences.less +++ b/client/simple/src/less/preferences.less @@ -35,7 +35,8 @@ table { width: 300px; } - input[type="text"] { + input[type="text"], + input[type="password"] { width: 13.25rem; color: var(--color-toolkit-input-text-font); border: none; @@ -65,7 +66,8 @@ table { width: 15em; select, - input[type="text"] { + input[type="text"], + input[type="password"] { font-size: inherit !important; margin-top: 0; .ltr-margin-right(1rem); diff --git a/client/simple/src/less/style.less b/client/simple/src/less/style.less index 46ba5d491..09723cb02 100644 --- a/client/simple/src/less/style.less +++ b/client/simple/src/less/style.less @@ -13,6 +13,7 @@ @import "stats.less"; @import "result_templates.less"; @import "weather.less"; +@import "ai_summary.less"; // for index.html template @import "index.less"; diff --git a/docs/admin/settings/index.rst b/docs/admin/settings/index.rst index c7812c9f6..5646f1e71 100644 --- a/docs/admin/settings/index.rst +++ b/docs/admin/settings/index.rst @@ -25,3 +25,4 @@ Settings settings_outgoing settings_categories_as_tabs settings_plugins + settings_ai_summary diff --git a/docs/admin/settings/settings_ai_summary.rst b/docs/admin/settings/settings_ai_summary.rst new file mode 100644 index 000000000..83487d2af --- /dev/null +++ b/docs/admin/settings/settings_ai_summary.rst @@ -0,0 +1,171 @@ +.. _settings ai_summary: + +=============== +``ai_summary:`` +=============== + +.. sidebar:: Further reading .. + + - :ref:`ai_summary plugin` + - :ref:`settings plugins` + - :ref:`settings preferences` + +Configuration of the :ref:`AI Summary plugin `, which shows a +short AI generated answer above the search results. + +The text is produced by an LLM server that you run; SearXNG ships no model and +contacts no AI provider of its own. Any server implementing the `OpenAI chat +completions API`_ works: `Ollama`_, vLLM, llama.cpp, LM Studio, Hugging Face +TGI and others. The plugin is not activated by default. + +.. _ai_summary quickstart: + +Quickstart +========== + +A local setup on the same machine as SearXNG, in four steps. + +**1. Install Ollama** + +.. code:: sh + + curl -fsSL https://ollama.com/install.sh | sh + +**2. Download a model** + +.. code:: sh + + ollama pull gemma3:4b + +``gemma3:4b`` needs roughly 4 GB of memory and runs on CPU if you have no GPU. +On a smaller machine use ``gemma3:1b``; any model in the `Ollama library`_ +works. + +**3. Configure SearXNG** + +Add this to your ``settings.yml``: + +.. code:: yaml + + ai_summary: + base_url: "http://127.0.0.1:11434" + model: "gemma3:4b" + + plugins: + searx.plugins.ai_summary.SXNGPlugin: + active: true + # keep the plugins you already had, see the warning below + searx.plugins.calculator.SXNGPlugin: {active: true} + searx.plugins.hash_plugin.SXNGPlugin: {active: true} + searx.plugins.self_info.SXNGPlugin: {active: true} + searx.plugins.unit_converter.SXNGPlugin: {active: true} + searx.plugins.ahmia_filter.SXNGPlugin: {active: true} + searx.plugins.hostnames.SXNGPlugin: {active: true} + searx.plugins.time_zone.SXNGPlugin: {active: true} + searx.plugins.tracker_url_remover.SXNGPlugin: {active: true} + searx.plugins.infinite_scroll.SXNGPlugin: {active: false} + searx.plugins.oa_doi_rewrite.SXNGPlugin: {active: false} + searx.plugins.tor_check.SXNGPlugin: {active: false} + +.. warning:: + + A ``plugins:`` block **replaces** the default list, it is not merged into it + (:ref:`settings plugins`). Listing only the AI Summary plugin switches + every other plugin off, which is why the block above repeats the defaults -- + drop the lines for plugins you do not want. + +**4. Restart SearXNG** and search for something. + +The summary appears above the results while it is still being written. + +Options +======= + +Only ``base_url`` is required. A model is needed too, but if ``model`` is left +empty the first entry of ``models`` is used. + +.. code:: yaml + + ai_summary: + base_url: "http://127.0.0.1:11434" + model: "gemma3:4b" + grounding: true + +.. autoclass:: searx.ai_summary.SettingsAISummary + :members: + +Servers that require authentication +=================================== + +vLLM and llama.cpp started with ``--api-key``, a gateway such as LiteLLM, or an +LLM server behind an authenticating reverse proxy all expect a key. Set it +with ``api_key``: + +.. code:: yaml + + ai_summary: + base_url: "http://127.0.0.1:8000" + api_key: "sk-..." + model: "gemma3:4b" + +The key is sent as an ``Authorization: Bearer`` header and only to the server in +``base_url``. Users who configure a server of their own in the +``ai_summary_server`` preference never receive it; they set their own key in the +``ai_summary_api_key`` preference. + +SearXNG has no separate secret store, so the key is held in ``settings.yml`` -- +that file should be readable only by the user SearXNG runs as. + +.. _ai_summary grounding: + +Grounding +========= + +With ``grounding`` enabled, which is the default, the query **and the top search +results** (title, URL and snippet, at most ``max_context_items`` of them) are +sent to the LLM server, and the answer reflects what the search found. With it +disabled only the query is sent and the model answers from its training data. +Users can change this in the ``ai_summary_grounding`` preference. + +What leaves the network therefore depends on where the LLM server runs: with a +server on localhost or in the local network, nothing does. + +Public SearXNG instances +======================== + +The server URL, model and API key are user preferences so that someone running +SearXNG at home can switch models or debug their LLM server from the +preferences page, without editing ``settings.yml`` and restarting. + +On public SearXNG instances, those same preferences let any visitor choose the +address the summary request is sent to. The request is made by the SearXNG +host, so a visitor can use it to reach machines on your network that they have +no route to themselves -- an `SSRF`_ vector. + +.. attention:: + + Lock ``ai_summary_server`` on any SearXNG instance that is reachable by + people outside your household. + +Locking a preference makes SearXNG use your configured value and ignore the +user's (:ref:`settings preferences`): + +.. code:: yaml + + preferences: + lock: + - ai_summary_server + - ai_summary_api_key + - ai_summary_model + - ai_summary_grounding + +``ai_summary_server`` is the one that matters: locking it closes the SSRF +vector. Locking ``ai_summary_api_key`` additionally stops visitors making your +SearXNG instance send an ``Authorization`` header of their choosing to a host of +their choosing. ``ai_summary_model`` and ``ai_summary_grounding`` are about +cost and consistency rather than security. + +.. _Ollama: https://ollama.com/ +.. _Ollama library: https://ollama.com/library +.. _OpenAI chat completions API: https://platform.openai.com/docs/api-reference/chat +.. _SSRF: https://owasp.org/www-community/attacks/Server_Side_Request_Forgery diff --git a/docs/dev/plugins/ai_summary.rst b/docs/dev/plugins/ai_summary.rst new file mode 100644 index 000000000..142ee3ec5 --- /dev/null +++ b/docs/dev/plugins/ai_summary.rst @@ -0,0 +1,103 @@ +.. _ai_summary plugin: + +========== +AI Summary +========== + +.. sidebar:: Further reading .. + + - :ref:`Configuration ` + - :ref:`dev plugin` + - :ref:`result types` + +The AI Summary plugin shows a generated answer above the ordinary search +results. The text comes from an LLM server run by the administrator, which +speaks the `OpenAI chat completions API`_ -- `Ollama`_, Hugging Face TGI, +LiteLLM, vLLM, llama.cpp and anything else implementing that specification. +See :ref:`its configuration ` for how to set one up. + +The summary is generated asynchronously: the result page is delivered without +delay and carries an empty placeholder, which the browser fills from a second, +streaming request. + +Request flow +============ + +.. _ai_summary dataflow: + +.. kernel-render:: DOT + :alt: Data flow between browser, SearXNG and the LLM server + :caption: A search that produces a summary: two requests, not one + + digraph ai_summary { + rankdir=LR; + graph [fontname="sans-serif", ranksep=1.1, nodesep=0.4]; + node [fontname="sans-serif", fontsize=11, shape=box, style="rounded,filled", + fillcolor="#f4f4f4", color="#999999"]; + edge [fontname="sans-serif", fontsize=9, color="#666666"]; + + browser [label="browser"]; + searxng [label="SearXNG"]; + engines [label="search engines", fillcolor="#ffffff"]; + llm [label="LLM server\nOllama, vLLM, ...", fillcolor="#ffffff"]; + + browser -> searxng [label=" 1 GET /search"]; + searxng -> engines [label=" 2 query"]; + searxng -> browser [label=" 3 result page,\l empty summary box\l", constraint=false]; + browser -> searxng [label=" 4 POST /ai_summary\l (query + results)\l"]; + searxng -> llm [label=" 5 POST /v1/chat/completions"]; + llm -> searxng [label=" 6 SSE token stream", constraint=false]; + searxng -> browser [label=" 7 NDJSON token stream", constraint=false]; + } + +Steps 1 to 3 are an ordinary SearXNG search. :py:obj:`SXNGPlugin.post_search +` adds an empty +:py:obj:`searx.result_types.AiSummary` placeholder to the answer area and +returns; the result page is not delayed. + +Steps 4 to 7 run in the browser once the page is rendered. +``client/simple/src/js/plugin/AiSummary.ts`` posts to the ``/ai_summary`` +endpoint (registered in :py:obj:`searx.webapp`), which opens a streaming +request to the LLM server and re-emits the tokens as they arrive. + +The two streams use different formats. The LLM server sends `SSE`_ -- +``data: {...}`` lines terminated by ``data: [DONE]``. SearXNG re-emits them to +the browser as `NDJSON`_: one JSON object per line, ``{"delta": "..."}`` for +each chunk of text and a final ``{"done": true}``. + +When no summary is generated +============================ + +:py:obj:`SXNGPlugin.post_search +` adds no placeholder for: + +- page two and beyond +- categories other than *general* +- non-HTML output formats (the JSON, CSV and RSS APIs) +- queries an engine already answered with an infobox (wikipedia, wikidata) or + an instant answer (e.g. ddg definitions) +- an empty query, or no LLM server configured + +API keys +======== + +The administrator's ``api_key`` is sent only to the configured ``base_url``. +Users who point the ``ai_summary_server`` preference at a server of their own +authenticate it with their own ``ai_summary_api_key`` preference, which is +stored in a cookie and excluded from the preferences URL; the administrator's +key is never sent to such a server. A server URL carrying credentials in its +userinfo is ignored, and the administrator's default is used instead. + +:py:obj:`_server_api_key ` implements +the rule. + +Reference +========= + +.. automodule:: searx.plugins.ai_summary + :members: + +.. _Ollama: https://ollama.com/ +.. _OpenAI chat completions API: https://platform.openai.com/docs/api-reference/chat +.. _SSE: https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events +.. _NDJSON: https://github.com/ndjson/ndjson-spec diff --git a/docs/dev/plugins/builtins.rst b/docs/dev/plugins/builtins.rst index 939304dc6..b9dbef3b7 100644 --- a/docs/dev/plugins/builtins.rst +++ b/docs/dev/plugins/builtins.rst @@ -7,6 +7,7 @@ Built-in Plugins .. toctree:: :maxdepth: 1 + ai_summary calculator hash_plugin hostnames diff --git a/searx/_settings.py b/searx/_settings.py index 0db62474c..446a5c6d0 100644 --- a/searx/_settings.py +++ b/searx/_settings.py @@ -33,6 +33,9 @@ class SettingsPref(msgspec.Struct, kw_only=True, forbid_unknown_fields=True): "theme", "results_on_new_tab", "doi_resolver", + "ai_summary_server", + "ai_summary_model", + "ai_summary_grounding", "simple_style", "center_alignment", "query_in_title", diff --git a/searx/ai_summary.py b/searx/ai_summary.py new file mode 100644 index 000000000..4405b827a --- /dev/null +++ b/searx/ai_summary.py @@ -0,0 +1,135 @@ +# SPDX-License-Identifier: AGPL-3.0-or-later +"""Implementations needed for the AI Summary plugin +(:py:obj:`searx.plugins.ai_summary`).""" +# pylint: disable=too-few-public-methods + +# Struct fields aren't discovered in Python 3.14 +# - https://github.com/searxng/searxng/issues/5284 +from __future__ import annotations + +__all__ = ["SettingsAISummary", "MODELS", "model_choices", "build_chat_messages"] + +import msgspec + +DEFAULT_SYSTEM_PROMPT = ( + "You are a search assistant. Answer the user's search query concisely in" + " a few short paragraphs of plain text. If you are unsure or don't know" + " the answer, say so." +) + +DEFAULT_SYSTEM_PROMPT_GROUNDED = ( + "You are a search assistant. Answer the user's search query concisely in" + " a few short paragraphs of plain text, using the following search results" + " as context when they are relevant. If you are unsure or don't know the" + " answer, say so.\n\nSearch results:\n\n{context}" +) + +MODELS: list[str] = [] +"""List of model names a user can select from. Populated once at +application setup by :py:obj:`searx.plugins.ai_summary.SXNGPlugin.init`.""" + + +class SettingsAISummary(msgspec.Struct, kw_only=True, forbid_unknown_fields=True): + """Options for configuring the AI Summary plugin. + + .. code:: yaml + + ai_summary: + base_url: "http://127.0.0.1:11434" + model: "llama3.2:3b" + models: + - "llama3.2:3b" + - "gemma3:4b" + """ + + base_url: str = "" + """Default base URL of the LLM server (e.g. ``http://127.0.0.1:11434`` + for Ollama). Any server that implements the OpenAI chat completions API + works (Ollama, vLLM, llama.cpp, LM Studio, Hugging Face TGI, ...). Users + can set their own server URL in the preferences (``ai_summary_server``) + unless that preference is locked.""" + + api_key: str = "" + """Optional API key of the LLM server in + :py:obj:`SettingsAISummary.base_url`, sent in an ``Authorization: Bearer`` + header. Needed by servers that require authentication, e.g. vLLM or + llama.cpp started with ``--api-key``, or an LLM server behind an + authenticating reverse proxy. + + This key is **only** sent to :py:obj:`SettingsAISummary.base_url`: a user + who points the ``ai_summary_server`` preference at a server of their own + gets no ``Authorization`` header from it, so the key can't be captured by + a third party. For their own server, users configure their own key in the + ``ai_summary_api_key`` preference (see + :py:obj:`searx.plugins.ai_summary._server_api_key`).""" + + model: str = "" + """Name of the default model (e.g. ``llama3.2:3b``). If empty, the first + entry of :py:obj:`SettingsAISummary.models` is used. Users can set their + own model in the preferences (``ai_summary_model``) unless that preference + is locked.""" + + models: list[str] = [] + """List of model names suggested to the user in the preferences. If empty + and :py:obj:`SettingsAISummary.base_url` is set, the list is requested + once at application setup from the LLM server (``GET /v1/models``).""" + + grounding: bool = True + """Default of the ``ai_summary_grounding`` user preference: ground the + summary on the search results. Grounded summaries are more accurate and + more current at a moderate extra cost (the search results are sent along + with the query, so the prompt is longer). Users can still opt in/out in + the preferences unless that preference is locked.""" + + connect_timeout: float = 5.0 + """Timeout (seconds) to establish a TCP connection to the LLM server.""" + + read_timeout: float = 30.0 + """Maximum gap (seconds) between two chunks of the token stream.""" + + stream_timeout: float = 120.0 + """Wall clock limit (seconds) for one completion.""" + + max_context_items: int = 5 + """Maximum number of search results accepted as grounding context.""" + + max_history_messages: int = 12 + """Maximum number of messages (follow-up chat history) per request.""" + + max_message_length: int = 4000 + """Maximum length (characters) of a single message or context snippet.""" + + system_prompt: str = DEFAULT_SYSTEM_PROMPT + """System prompt used when the *grounding* preference is off.""" + + system_prompt_grounded: str = DEFAULT_SYSTEM_PROMPT_GROUNDED + """System prompt used when the *grounding* preference is on. The + placeholder ``{context}`` is replaced by an enumeration of the search + results sent along with the query.""" + + +def model_choices() -> list[str]: + """Model names a user can select from in the preferences.""" + return list(MODELS) + + +def build_chat_messages( + cfg: SettingsAISummary, + messages: list[dict[str, str]], + context: list[dict[str, str]] | None = None, +) -> list[dict[str, str]]: + """Build the message list for the chat completions request from the + (already validated) request ``messages``, prepending a system prompt. When + ``context`` items are given, the grounded system prompt is used and the + context items are serialized into its ``{context}`` placeholder.""" + + if context: + ctx_lines = [ + f"[{no}] {item.get('title', '')} — {item.get('snippet', '')} ({item.get('url', '')})" + for no, item in enumerate(context[: cfg.max_context_items], start=1) + ] + system_prompt = cfg.system_prompt_grounded.replace("{context}", "\n".join(ctx_lines)) + else: + system_prompt = cfg.system_prompt + + return [{"role": "system", "content": system_prompt}, *messages] diff --git a/searx/plugins/_core.py b/searx/plugins/_core.py index 4b9db076e..9eef77fc0 100644 --- a/searx/plugins/_core.py +++ b/searx/plugins/_core.py @@ -42,7 +42,7 @@ class PluginInfo: description: str """Short description of the *answerer*.""" - preference_section: t.Literal["general", "ui", "privacy", "query"] | None = "general" + preference_section: t.Literal["general", "ui", "privacy", "query", "ai"] | None = "general" """Section (tab/group) in the preferences where this plugin is shown to the user. diff --git a/searx/plugins/ai_summary.py b/searx/plugins/ai_summary.py new file mode 100644 index 000000000..c919fd604 --- /dev/null +++ b/searx/plugins/ai_summary.py @@ -0,0 +1,386 @@ +# SPDX-License-Identifier: AGPL-3.0-or-later +"""Implementation of the AI Summary plugin, which shows a generated answer above +the search results. The answer comes from an LLM server that implements the +`OpenAI chat completions API`_ (Ollama, vLLM, llama.cpp, LM Studio, Hugging Face +TGI, ...) and that the administrator runs. + +- :ref:`ai_summary plugin` describes the design and the request flow. +- :ref:`settings ai_summary` describes how to configure it. + +This module holds the plugin itself and the ``/ai_summary`` endpoint +(:py:obj:`ai_summary_view`, registered in :py:obj:`searx.webapp`). The endpoint +streams the answer to the browser, so that the result page is never delayed by +the LLM; :py:obj:`SXNGPlugin.post_search` only adds an empty +:py:obj:`searx.result_types.AiSummary` placeholder for the client to fill. + +Settings of the ``ai_summary:`` section are defined in +:py:obj:`searx.ai_summary.SettingsAISummary`. + +.. _OpenAI chat completions API: https://platform.openai.com/docs/api-reference/chat +""" + +import typing as t + +import json +import logging +import re +import time +from urllib.parse import urlparse + +import flask +import httpx +from flask_babel import gettext + +from searx import get_setting +from searx.ai_summary import SettingsAISummary, build_chat_messages +from searx.extended_types import sxng_request +from searx.result_types import EngineResults +import searx.ai_summary + +from . import Plugin, PluginInfo + +if t.TYPE_CHECKING: + from searx.search import SearchWithPlugins + from searx.extended_types import SXNG_Request + from . import PluginCfg + +VALID_ROLES = ("user", "assistant") +# Model names differ per provider: "gemma3:4b" (Ollama), "bedrock/anthropic. +# claude-3-5-sonnet" (a gateway's routing prefix), "gemini-1.5-pro@001" (a +# pinned version). The pattern accepts those and rejects anything that could +# change the meaning of the request body it is placed into. +MODEL_NAME_REGEXP = re.compile(r"[A-Za-z0-9._:/@-]{1,128}") + +log = logging.getLogger("searx.plugins.ai_summary") + +UPSTREAM_RETRIES = 1 +"""How often a request to the LLM server is repeated when the server does not +answer in time. + +An idle LLM server unloads the model, and loads it again on the next request -- +which can take longer than :py:obj:`read_timeout +`, because no byte of the +response is sent while the model is loading. The request that runs into this +is also the request that starts the load, so repeating it usually succeeds.""" + + +def _get_client(base_url: str, cfg: SettingsAISummary, api_key: str = "") -> httpx.Client: + """HTTP client for one request to the LLM server at ``base_url``. The + ``api_key`` (if any) is sent in an ``Authorization: Bearer`` header, see + :py:obj:`_server_api_key`.""" + # the OpenAI API paths are prefixed with /v1, unless the base URL already + # points into an API prefix + base_url = base_url.rstrip("/") + if not base_url.endswith("/v1"): + base_url += "/v1" + return httpx.Client( + base_url=base_url, + headers={"Authorization": f"Bearer {api_key}"} if api_key else None, + timeout=httpx.Timeout(connect=cfg.connect_timeout, read=cfg.read_timeout, write=10.0, pool=10.0), + ) + + +def _valid_server(url: str) -> bool: + try: + parsed = urlparse(url) + except ValueError: + return False + return parsed.scheme in ("http", "https") and bool(parsed.netloc) and len(url) <= 256 + + +def _server_id(url: str) -> tuple[str, str, int, str] | None: + """Identity of an LLM server URL (scheme, host, port, path) for comparing + two URLs, or ``None`` if the URL is unusable. The ``/v1`` API prefix is + not part of the identity, :py:obj:`_get_client` appends it when missing.""" + try: + parsed = urlparse(url) + except ValueError: + return None + # .hostname (not .netloc) drops the userinfo, so that a server URL like + # http://llm.example.org@untrusted.example.org/ is identified by the host + # the request is actually sent to (untrusted.example.org) + if parsed.scheme not in ("http", "https") or not parsed.hostname: + return None + port = parsed.port or (443 if parsed.scheme == "https" else 80) + path = parsed.path.rstrip("/") + if path.endswith("/v1"): + path = path[: -len("/v1")].rstrip("/") + return (parsed.scheme, parsed.hostname.lower(), port, path) + + +def _server_api_key(cfg: SettingsAISummary, server: str, user_api_key: str = "") -> str: + """The API key to send to ``server``: + + - the administrator's :py:obj:`cfg.api_key + ` if ``server`` *is* the + administrator's server (:py:obj:`cfg.base_url + `), + - otherwise the user's own ``ai_summary_api_key`` preference, which belongs + to the server in the user's own ``ai_summary_server`` preference. + + The administrator's key is never sent to a server a user configured -- + that would hand every user of the instance a way to capture it.""" + server_id = _server_id(server) + if server_id is not None and server_id == _server_id(cfg.base_url): + return cfg.api_key + return user_api_key + + +def _user_server(request: "SXNG_Request", cfg: SettingsAISummary) -> str: + """The LLM server URL for this request: the user's ``ai_summary_server`` + preference, or the administrator's default.""" + server = str(request.preferences.get_value("ai_summary_server") or "").strip() + # Credentials are stripped from a user's server URL: httpx turns them into + # an Authorization header, and a user should not be able to make SearXNG + # send a header of their choosing to a host of their choosing. An + # administrator can still use credentials in the configured base_url (e.g. + # an LLM server behind basic auth). + if server and "@" in urlparse(server).netloc: + server = "" + return server or cfg.base_url + + +class SXNGPlugin(Plugin): + """Plugin that adds the AI summary placeholder to the result page, the + ``/ai_summary`` endpoint itself is registered in :py:obj:`searx.webapp`.""" + + id = "ai_summary" + + def __init__(self, plg_cfg: "PluginCfg"): + super().__init__(plg_cfg) + + self.info = PluginInfo( + id=self.id, + name=gettext("AI Summary"), + description=gettext( + "Show an AI generated summary of the search query on top of the" + " result page (uses a local LLM server, see the settings below)." + ), + preference_section="ai", + ) + + def init(self, app: "flask.Flask") -> bool: + cfg: SettingsAISummary = get_setting("ai_summary") + + if cfg.base_url: + searx.ai_summary.MODELS = list(cfg.models) or self._probe_models(cfg) + if not cfg.model and searx.ai_summary.MODELS: + cfg.model = searx.ai_summary.MODELS[0] + if cfg.model and cfg.model not in searx.ai_summary.MODELS: + searx.ai_summary.MODELS.insert(0, cfg.model) + + return True + + def _probe_models(self, cfg: SettingsAISummary) -> list[str]: + """Request the list of models from the LLM server (``GET + /v1/models``). The server might not be up when SearXNG starts, a + failing probe only leaves the model suggestion list empty.""" + try: + with _get_client(cfg.base_url, cfg, cfg.api_key) as client: + resp = client.get("/models") + resp.raise_for_status() + models = [model["id"] for model in resp.json().get("data", [])] + except (httpx.HTTPError, ValueError, KeyError) as exc: + self.log.warning("can't request model list from %s: %s", cfg.base_url, exc) + models = [] + return models or ([cfg.model] if cfg.model else []) + + def post_search(self, request: "SXNG_Request", search: "SearchWithPlugins") -> EngineResults | None: + results = EngineResults() + sq = search.search_query + cfg: SettingsAISummary = get_setting("ai_summary") + + skip = ( + sq.pageno > 1 + # post_search is also called for the json, csv and rss formats, + # the placeholder is only useful on the HTML result page + or request.form.get("format", "html") != "html" + or "general" not in sq.categories + # an infobox (e.g. wikipedia / wikidata) or an instant answer + # (e.g. ddg definitions) most likely already answers the query + or bool(search.result_container.infoboxes) + or bool(search.result_container.answers) + or not sq.query.strip() + # without an LLM server (user preference or admin default) + # there is nothing to show + or not _user_server(request, cfg) + ) + if skip: + return None + + grounding = bool(request.preferences.get_value("ai_summary_grounding")) + results.add(results.types.AiSummary(query=sq.query, grounding=grounding)) + return results + + +def _bad_request(msg: str) -> flask.Response: + return flask.Response(json.dumps({"error": msg}), status=400, mimetype="application/json") + + +def _validate_messages(messages: t.Any, cfg: SettingsAISummary) -> list[dict[str, str]]: + if not isinstance(messages, list) or not messages or len(messages) > cfg.max_history_messages: + raise ValueError("invalid messages") + for msg in messages: + if not isinstance(msg, dict) or msg.keys() != {"role", "content"}: + raise ValueError("invalid message") + if msg["role"] not in VALID_ROLES or not isinstance(msg["content"], str): + raise ValueError("invalid message") + if not msg["content"].strip() or len(msg["content"]) > cfg.max_message_length: + raise ValueError("invalid message") + if messages[-1]["role"] != "user": + raise ValueError("last message is not a user message") + return messages + + +def _validate_context(context: t.Any, cfg: SettingsAISummary) -> list[dict[str, str]]: + if not isinstance(context, list) or len(context) > cfg.max_context_items: + raise ValueError("invalid context") + for item in context: + if not isinstance(item, dict) or not item.keys() <= {"title", "url", "snippet"}: + raise ValueError("invalid context item") + for val in item.values(): + if not isinstance(val, str) or len(val) > cfg.max_message_length: + raise ValueError("invalid context item") + return context + + +def _validate_payload(payload: t.Any, cfg: SettingsAISummary) -> tuple[list[dict[str, str]], list[dict[str, str]]]: + """Validate the request body of the ``/ai_summary`` endpoint and return + the ``messages`` and ``context`` lists. Raises a :py:obj:`ValueError` for + any malformed payload.""" + + if not isinstance(payload, dict): + raise ValueError("payload is not an object") + return _validate_messages(payload.get("messages"), cfg), _validate_context(payload.get("context", []), cfg) + + +def _open_upstream(client: httpx.Client, payload: dict[str, t.Any]) -> tuple[t.Any, t.Any]: + """Start the streaming completion on the LLM server. + + Returns the (already entered) stream context and the response, or + ``(None, None)`` if no usable response was received. + + The request is repeated (:py:obj:`UPSTREAM_RETRIES`) when the server did not + answer in time, and when it answered ``5xx`` -- both mean *not right now*, + and the most common reason is a model that is still being loaded. A ``4xx`` + is not repeated: a wrong API key or an unknown model name does not become + right when asked twice.""" + + for attempt in range(UPSTREAM_RETRIES + 1): + stream_ctx = client.stream("POST", "/chat/completions", json=payload) + try: + resp = stream_ctx.__enter__() # pylint: disable=unnecessary-dunder-call + except httpx.TransportError as exc: + if attempt < UPSTREAM_RETRIES: + log.debug("LLM server did not answer (%s), asking again", exc) + continue + log.warning("LLM server did not answer: %s", exc) + return None, None + except httpx.HTTPError as exc: + log.warning("request to the LLM server failed: %s", exc) + return None, None + + if resp.status_code == 200: + return stream_ctx, resp + + # the body of an error response is short and usually names the cause, + # e.g. an unknown model; without it a misconfiguration is invisible + detail = "" + try: + resp.read() + detail = resp.text.strip()[:200] + except (httpx.HTTPError, UnicodeDecodeError): # pragma: no cover + pass + stream_ctx.__exit__(None, None, None) + + # 5xx is the server saying it is not able to answer *right now* -- a + # model still loading, a gateway with no upstream yet. 4xx is the + # server saying the request is wrong, which a second one would be too. + if resp.status_code >= 500 and attempt < UPSTREAM_RETRIES: + log.debug("LLM server replied HTTP %s (%s), asking again", resp.status_code, detail) + continue + log.warning("LLM server responded with HTTP %s %s", resp.status_code, detail) + return None, None + + return None, None # pragma: no cover - the loop always returns + + +def ai_summary_view() -> flask.Response: + """Stream an AI generated answer for the messages in the request body, + response is NDJSON: ``{"delta": ..}`` lines followed by one final + ``{"done": true, ..}`` line.""" + + cfg: SettingsAISummary = get_setting("ai_summary") + + if SXNGPlugin.id not in sxng_request.user_plugins: + return flask.Response(json.dumps({"error": "plugin is not enabled"}), status=403, mimetype="application/json") + + try: + messages, context = _validate_payload(sxng_request.get_json(force=True, silent=True), cfg) + except ValueError as exc: + return _bad_request(str(exc)) + + server = _user_server(sxng_request, cfg) + if not _valid_server(server): + return _bad_request("no valid LLM server configured") + + model = str(sxng_request.preferences.get_value("ai_summary_model") or "").strip() or cfg.model + if not MODEL_NAME_REGEXP.fullmatch(model): + return _bad_request("no valid model configured") + + chat_payload = { + "model": model, + "messages": build_chat_messages(cfg, messages, context), + "stream": True, + } + + # open the upstream connection before streaming, a connection error is + # reported as HTTP 502 instead of a line in an already started stream + user_api_key = str(sxng_request.preferences.get_value("ai_summary_api_key") or "").strip() + client = _get_client(server, cfg, _server_api_key(cfg, server, user_api_key)) + stream_ctx, upstream = _open_upstream(client, chat_payload) + if stream_ctx is None or upstream is None: + client.close() + return flask.Response(json.dumps({"error": "upstream error"}), status=502, mimetype="application/json") + + # from here on nothing must be read from the request context, the + # generator runs after the request context has been torn down + + def ndjson(obj: dict[str, t.Any]) -> bytes: + # the generator bypasses flask's response encoding (direct_passthrough) + return (json.dumps(obj) + "\n").encode() + + def generate(): + start = time.monotonic() + try: + # the upstream is a SSE stream: "data: {..}" lines, terminated by + # a "data: [DONE]" line + for line in upstream.iter_lines(): + if time.monotonic() - start > cfg.stream_timeout: + yield ndjson({"done": True, "error": "timeout"}) + return + line = line.strip() + if not line or line.startswith(":") or not line.startswith("data:"): + continue + payload = line[len("data:") :].strip() + if payload == "[DONE]": + break + data = json.loads(payload) + choices = data.get("choices") or [{}] + delta = choices[0].get("delta", {}).get("content") or "" + if delta: + yield ndjson({"delta": delta}) + yield ndjson({"done": True, "model": model}) + except (httpx.HTTPError, ValueError) as exc: + log.warning("error while streaming from the LLM server: %s", exc) + yield ndjson({"done": True, "error": "upstream error"}) + finally: + stream_ctx.__exit__(None, None, None) + client.close() + + return flask.Response( + generate(), + mimetype="application/x-ndjson", + headers={"Cache-Control": "no-store", "X-Accel-Buffering": "no"}, + direct_passthrough=True, + ) diff --git a/searx/preferences.py b/searx/preferences.py index edc80f8bd..df7d80ecd 100644 --- a/searx/preferences.py +++ b/searx/preferences.py @@ -49,10 +49,14 @@ class ValidationException(Exception): class Setting: """Base class of user settings""" - def __init__(self, default_value: t.Any, locked: bool = False): + def __init__(self, default_value: t.Any, locked: bool = False, secret: bool = False): super().__init__() self.value: t.Any = default_value self.locked: bool = locked + self.secret: bool = secret + """The value is a credential: it is not included in the preferences URL + (:py:obj:`Preferences.get_as_url_params`), which users copy around to + transfer or share their preferences.""" def parse(self, data: str): """Parse ``data`` and store the result at ``self.value`` @@ -462,6 +466,27 @@ class Preferences: locked="doi_resolver" in self.cfg.lock, choices=DOI_RESOLVERS, ), + # empty values fall back to the administrator's defaults in the + # ai_summary: section (searx.ai_summary.SettingsAISummary) + 'ai_summary_server': StringSetting( + "", + locked="ai_summary_server" in self.cfg.lock, + ), + 'ai_summary_api_key': StringSetting( + "", + locked="ai_summary_api_key" in self.cfg.lock, + # a user's API key is only sent to a server the user configured + # themselves, and it is never part of the preferences URL + secret=True, + ), + 'ai_summary_model': StringSetting( + "", + locked="ai_summary_model" in self.cfg.lock, + ), + 'ai_summary_grounding': BooleanSetting( + get_setting("ai_summary").grounding, + locked="ai_summary_grounding" in self.cfg.lock, + ), 'simple_style': EnumStringSetting( get_setting("ui.theme_args.simple_style"), locked="simple_style" in self.cfg.lock, @@ -498,7 +523,7 @@ class Preferences: """Return preferences as URL parameters""" settings_kv = {} for k, v in self.key_value_settings.items(): - if v.locked: + if v.locked or v.secret: continue if isinstance(v, MultipleChoiceSetting): settings_kv[k] = ','.join(v.get_value()) diff --git a/searx/result_types/__init__.py b/searx/result_types/__init__.py index 2ea989149..cd361e31f 100644 --- a/searx/result_types/__init__.py +++ b/searx/result_types/__init__.py @@ -19,6 +19,7 @@ __all__ = [ "EngineResults", "AnswerSet", "Answer", + "AiSummary", "Translations", "WeatherAnswer", "Code", @@ -32,7 +33,7 @@ import typing as t import abc from ._base import Result, MainResult, LegacyResult -from .answer import AnswerSet, Answer, Translations, WeatherAnswer +from .answer import AnswerSet, Answer, AiSummary, Translations, WeatherAnswer from .keyvalue import KeyValue from .code import Code from .paper import Paper @@ -49,6 +50,7 @@ class ResultList(list[Result | LegacyResult], abc.ABC): implemented).""" Answer = Answer + AiSummary = AiSummary KeyValue = KeyValue Code = Code Paper = Paper diff --git a/searx/result_types/answer.py b/searx/result_types/answer.py index 1a24f12f1..74e4bbdfc 100644 --- a/searx/result_types/answer.py +++ b/searx/result_types/answer.py @@ -14,6 +14,10 @@ template. :members: :show-inheritance: +.. autoclass:: AiSummary + :members: + :show-inheritance: + .. autoclass:: Translations :members: :show-inheritance: @@ -29,7 +33,7 @@ template. # pylint: disable=too-few-public-methods -__all__ = ["AnswerSet", "Answer", "Translations", "WeatherAnswer"] +__all__ = ["AnswerSet", "Answer", "AiSummary", "Translations", "WeatherAnswer"] from flask_babel import gettext import msgspec @@ -92,6 +96,28 @@ class Answer(BaseAnswer, kw_only=True): return hash(self.answer) +class AiSummary(BaseAnswer, kw_only=True): + """Placeholder for an AI generated summary of the search query + (:py:obj:`searx.plugins.ai_summary`). The summary itself is fetched + asynchronously by the client after the result page has been rendered.""" + + # The answers of an AnswerSet are sorted by their template name; this + # template sorts before the other answer templates, the AI summary is + # therefore rendered first in the answer area. + template: str = "answer/ai_summary.html" + + query: str + """The search query the summary is generated for.""" + + grounding: bool = False + """Ground the summary on the search results (user's preference).""" + + def __hash__(self): + """The hash value of field *query* is the hash value of the + :py:obj:`AiSummary` object.""" + return hash(self.query) + + class Translations(BaseAnswer, kw_only=True): """Answer type with a list of translations. diff --git a/searx/settings.yml b/searx/settings.yml index a7cc04d23..c5bb899f9 100644 --- a/searx/settings.yml +++ b/searx/settings.yml @@ -256,6 +256,9 @@ plugins: searx.plugins.tracker_url_remover.SXNGPlugin: active: true + searx.plugins.ai_summary.SXNGPlugin: + active: false + # Configuration of the "Hostnames plugin": # @@ -283,6 +286,34 @@ plugins: # '(.*\.)?youtu\.be$': 'yt.example.com' # +# Configuration of the "AI Summary plugin", for more details see +# https://docs.searxng.org/admin/settings/settings_ai_summary.html +# +# ai_summary: +# +# # Base URL of an OpenAI compatible LLM server (Ollama, vLLM, LM Studio, +# # llama.cpp, Hugging Face TGI, ...), used as the default for the +# # ai_summary_server preference. +# base_url: "http://127.0.0.1:11434" +# +# # API key of the server above, if it requires authentication (e.g. vLLM or +# # llama.cpp with --api-key). Sent as "Authorization: Bearer" and only to +# # base_url, never to a server configured by a user in the preferences. +# api_key: "" +# +# # Default model; if empty, the first entry of models: is used. +# model: "llama3.2:3b" +# +# # Models suggested to the user in the preferences; if empty, the list +# # is requested from the LLM server (GET /v1/models) at startup. +# models: +# - "llama3.2:3b" +# - "gemma3:4b" +# +# # Ground summaries on the search results by default (users can still opt +# # in/out in their preferences). +# grounding: true + categories_as_tabs: general: diff --git a/searx/settings_defaults.py b/searx/settings_defaults.py index 5fed08b68..77bfa6365 100644 --- a/searx/settings_defaults.py +++ b/searx/settings_defaults.py @@ -13,6 +13,7 @@ from os.path import dirname, abspath import msgspec from typing_extensions import override +from .ai_summary import SettingsAISummary from .brand import SettingsBrand from .sxng_locales import sxng_locales from ._settings import 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this.opacity_}getRotateWithView(){return this.rotateWithView_}getRotation(){return this.rotation_}getScale(){return this.scale_}getScaleArray(){return this.scaleArray_}getDisplacement(){return this.displacement_}getDeclutterMode(){return this.declutterMode_}getAnchor(){return D()}getImage(e){return D()}getHitDetectionImage(){return D()}getPixelRatio(e){return 1}getImageState(){return D()}getImageSize(){return D()}getOrigin(){return D()}getSize(){return D()}setDisplacement(e){this.displacement_=e}setOpacity(e){this.opacity_=e}setRotateWithView(e){this.rotateWithView_=e}setRotation(e){this.rotation_=e}setScale(e){this.scale_=e,this.scaleArray_=zo(e)}listenImageChange(e){D()}load(){D()}unlistenImageChange(e){D()}ready(){return Promise.resolve()}},Vo=class e extends Bo{constructor(e){super({opacity:1,rotateWithView:e.rotateWithView!==void 0&&e.rotateWithView,rotation:e.rotation===void 0?0:e.rotation,scale:e.scale===void 0?1:e.scale,displacement:e.displacement===void 0?[0,0]:e.displacement,declutterMode:e.declutterMode}),this.hitDetectionCanvas_=null,this.fill_=e.fill===void 0?null:e.fill,this.origin_=[0,0],this.points_=e.points,this.radius=e.radius,this.radius2_=e.radius2,this.angle_=e.angle===void 0?0:e.angle,this.stroke_=e.stroke===void 0?null:e.stroke,this.size_,this.renderOptions_,this.imageState_=this.fill_&&this.fill_.loading()?B.LOADING:B.LOADED,this.imageState_===B.LOADING&&this.ready().then(()=>this.imageState_=B.LOADED),this.render()}clone(){let t=this.getScale(),n=new e({fill:this.getFill()?this.getFill().clone():void 0,points:this.getPoints(),radius:this.getRadius(),radius2:this.getRadius2(),angle:this.getAngle(),stroke:this.getStroke()?this.getStroke().clone():void 0,rotation:this.getRotation(),rotateWithView:this.getRotateWithView(),scale:Array.isArray(t)?t.slice():t,displacement:this.getDisplacement().slice(),declutterMode:this.getDeclutterMode()});return n.setOpacity(this.getOpacity()),n}getAnchor(){let e=this.size_,t=this.getDisplacement(),n=this.getScaleArray();return[e[0]/2-t[0]/n[0],e[1]/2+t[1]/n[1]]}getAngle(){return this.angle_}getFill(){return this.fill_}setFill(e){this.fill_=e,this.render()}getHitDetectionImage(){return this.hitDetectionCanvas_||=this.createHitDetectionCanvas_(this.renderOptions_),this.hitDetectionCanvas_}getImage(e){let t=this.fill_?.getKey(),n=`${e},${this.angle_},${this.radius},${this.radius2_},${this.points_},${t}`+Object.values(this.renderOptions_).join(`,`),r=Yi.get(n,null)?.getImage(1);if(!r){let t=this.renderOptions_,i=Math.ceil(t.size*e),a=H(i,i);this.draw_(t,a,e),r=a.canvas;let o=new Zi(r,void 0,null,B.LOADED,null);Yi.set(n,null,o),createImageBitmap(r).then(e=>{o.setImage(e)})}return r}getPixelRatio(e){return e}getImageSize(){return this.size_}getImageState(){return this.imageState_}getOrigin(){return this.origin_}getPoints(){return this.points_}getRadius(){return this.radius}setRadius(e){this.radius!==e&&(this.radius=e,this.render())}getRadius2(){return this.radius2_}setRadius2(e){this.radius2_!==e&&(this.radius2_=e,this.render())}getSize(){return this.size_}getStroke(){return this.stroke_}setStroke(e){this.stroke_=e,this.render()}listenImageChange(e){}load(){}unlistenImageChange(e){}calculateLineJoinSize_(e,t,n){if(t===0||this.points_===1/0||e!==`bevel`&&e!==`miter`)return t;let r=this.radius,i=this.radius2_===void 0?r:this.radius2_;if(rs&&(this.instructions.push([U.CUSTOM,s,l,e,n,mr,i]),this.hitDetectionInstructions.push([U.CUSTOM,s,l,e,r||n,mr,i]));break;case`Point`:c=e.getFlatCoordinates(),this.coordinates.push(c[0],c[1]),l=this.coordinates.length,this.instructions.push([U.CUSTOM,s,l,e,n,void 0,i]),this.hitDetectionInstructions.push([U.CUSTOM,s,l,e,r||n,void 0,i]);break;default:}this.endGeometry(t)}beginGeometry(e,t,n){this.beginGeometryInstruction1_=[U.BEGIN_GEOMETRY,t,0,e,n],this.instructions.push(this.beginGeometryInstruction1_),this.beginGeometryInstruction2_=[U.BEGIN_GEOMETRY,t,0,e,n],this.hitDetectionInstructions.push(this.beginGeometryInstruction2_)}finish(){return{instructions:this.instructions,hitDetectionInstructions:this.hitDetectionInstructions,coordinates:this.coordinates}}reverseHitDetectionInstructions(){let e=this.hitDetectionInstructions;e.reverse();let t,n=e.length,r,i,a=-1;for(t=0;tthis.maxLineWidth&&(this.maxLineWidth=t.lineWidth,this.bufferedMaxExtent_=null)}else t.strokeStyle=void 0,t.lineCap=void 0,t.lineDash=null,t.lineDashOffset=void 0,t.lineJoin=void 0,t.lineWidth=void 0,t.miterLimit=void 0,t.strokeOffset=void 0;return t}setFillStrokeStyle(e,t){let n=this.state;this.fillStyleToState(e,n),this.strokeStyleToState(t,n)}createFill(e){let t=e.fillStyle,n=[U.SET_FILL_STYLE,t];return typeof t!=`string`&&n.push(e.fillPatternScale),n}applyStroke(e){this.instructions.push(this.createStroke(e))}createStroke(e){return[U.SET_STROKE_STYLE,e.strokeStyle,e.lineWidth*this.pixelRatio,e.lineCap,e.lineJoin,e.miterLimit,e.lineDash?this.applyPixelRatio(e.lineDash):null,e.lineDashOffset*this.pixelRatio]}updateFillStyle(e,t){let n=e.fillStyle;(n!==void 0&&typeof n!=`string`||e.currentFillStyle!=n)&&(this.instructions.push(t.call(this,e)),e.currentFillStyle=n)}updateStrokeStyle(e,t){let n=e.strokeStyle,r=e.lineCap,i=e.lineDash,a=e.lineDashOffset,o=e.lineJoin,s=e.lineWidth,c=e.miterLimit,l=e.strokeOffset;(e.currentStrokeStyle!=n||e.currentLineCap!=r||i!=e.currentLineDash&&!g(e.currentLineDash,i)||e.currentLineDashOffset!=a||e.currentLineJoin!=o||e.currentLineWidth!=s||e.currentMiterLimit!=c||e.currentStrokeOffset!=l)&&(t.call(this,e),e.currentStrokeStyle=n,e.currentLineCap=r,e.currentLineDash=i,e.currentLineDashOffset=a,e.currentLineJoin=o,e.currentLineWidth=s,e.currentMiterLimit=c,e.currentStrokeOffset=l)}endGeometry(e){this.beginGeometryInstruction1_[2]=this.instructions.length,this.beginGeometryInstruction1_=null,this.beginGeometryInstruction2_[2]=this.hitDetectionInstructions.length,this.beginGeometryInstruction2_=null;let t=[U.END_GEOMETRY,e];this.instructions.push(t),this.hitDetectionInstructions.push(t)}getBufferedMaxExtent(){if(!this.bufferedMaxExtent_&&(this.bufferedMaxExtent_=se(this.maxExtent),this.maxLineWidth>0)){let e=this.resolution*(this.maxLineWidth+1)/2;oe(this.bufferedMaxExtent_,e,this.bufferedMaxExtent_)}return this.bufferedMaxExtent_}},ns=class extends ts{constructor(e,t,n,r){super(e,t,n,r),this.hitDetectionImage_=null,this.image_=null,this.imagePixelRatio_=void 0,this.anchorX_=void 0,this.anchorY_=void 0,this.height_=void 0,this.opacity_=void 0,this.originX_=void 0,this.originY_=void 0,this.rotateWithView_=void 0,this.rotation_=void 0,this.scale_=void 0,this.width_=void 0,this.declutterMode_=void 0,this.declutterImageWithText_=void 0}drawPoint(e,t,n){if(!this.image_||this.maxExtent&&!le(this.maxExtent,e.getFlatCoordinates()))return;this.beginGeometry(e,t,n);let r=e.getFlatCoordinates(),i=e.getStride(),a=this.coordinates.length,o=this.appendFlatPointCoordinates(r,i);this.instructions.push([U.DRAW_IMAGE,a,o,this.image_,this.anchorX_*this.imagePixelRatio_,this.anchorY_*this.imagePixelRatio_,Math.ceil(this.height_*this.imagePixelRatio_),this.opacity_,this.originX_*this.imagePixelRatio_,this.originY_*this.imagePixelRatio_,this.rotateWithView_,this.rotation_,[this.scale_[0]*this.pixelRatio/this.imagePixelRatio_,this.scale_[1]*this.pixelRatio/this.imagePixelRatio_],Math.ceil(this.width_*this.imagePixelRatio_),this.declutterMode_,this.declutterImageWithText_]),this.hitDetectionInstructions.push([U.DRAW_IMAGE,a,o,this.hitDetectionImage_,this.anchorX_,this.anchorY_,this.height_,1,this.originX_,this.originY_,this.rotateWithView_,this.rotation_,this.scale_,this.width_,this.declutterMode_,this.declutterImageWithText_]),this.endGeometry(t)}drawMultiPoint(e,t,n){if(!this.image_)return;this.beginGeometry(e,t,n);let r=e.getFlatCoordinates(),i=[];for(let t=0,n=r.length;tthis.drawCircle(e,t,n)))return;this.setFillStrokeStyles_(),this.beginGeometry(e,t,n),r.fillStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_FILL_STYLE,ma]),r.strokeStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_STROKE_STYLE,va,r.lineWidth,r.lineCap,r.lineJoin,r.miterLimit,ga,0]);let s=e.getFlatCoordinates(),c=e.getStride(),l=this.coordinates.length;this.appendFlatLineCoordinates(s,0,s.length,c,!1,!1);let u=[U.CIRCLE,l,o];this.instructions.push($o,u),this.hitDetectionInstructions.push($o,u),r.fillStyle!==void 0&&(this.instructions.push(Zo),this.hitDetectionInstructions.push(Zo)),r.strokeStyle!==void 0&&(this.instructions.push(Qo),this.hitDetectionInstructions.push(Qo)),this.endGeometry(t)}drawPolygon(e,t,n){let r=this.state,i=r.fillStyle,a=r.strokeStyle,o=r.strokeOffset;if(i===void 0&&a===void 0||this.handleStrokeOffset_(()=>this.drawPolygon(e,t,n)))return;this.setFillStrokeStyles_(),this.beginGeometry(e,t,n),r.fillStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_FILL_STYLE,ma]),r.strokeStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_STROKE_STYLE,va,r.lineWidth,r.lineCap,r.lineJoin,r.miterLimit,ga,0]);let s=e.getEnds(),c=e.getOrientedFlatCoordinates(),l=e.getStride();this.drawFlatCoordinatess_(c,0,s,l,o),this.endGeometry(t)}drawMultiPolygon(e,t,n){let r=this.state,i=r.fillStyle,a=r.strokeStyle,o=r.strokeOffset;if(i===void 0&&a===void 0||this.handleStrokeOffset_(()=>this.drawMultiPolygon(e,t,n)))return;this.setFillStrokeStyles_(),this.beginGeometry(e,t,n),r.fillStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_FILL_STYLE,ma]),r.strokeStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_STROKE_STYLE,va,r.lineWidth,r.lineCap,r.lineJoin,r.miterLimit,ga,0]);let s=e.getEndss(),c=e.getOrientedFlatCoordinates(),l=e.getStride(),u=0;for(let e=0,t=s.length;e0&&n!==void 0&&r!==void 0?(t.strokeStyle=void 0,t.strokeOffset=0,e(),t.fillStyle=void 0,t.strokeStyle=r,t.strokeOffset=i,e(),t.fillStyle=n,!0):!1}};function as(e,t,n,r,i){let a=[],o=n,s=0,c=t.slice(n,2);for(;s=e){let t=(e-s+d)/d,f=Ge(n,l,t),p=Ge(r,u,t);c.push(f,p),a.push(c),c=[f,p],s==e&&(o+=i),s=0}else if(s0&&a.push(c),a}function os(e,t,n,r,i){let a=n,o=n,s=0,c=0,l=n,u,d,f,p,m,h,g,_,v,y;for(d=n;de&&(c>s&&(s=c,a=l,o=d),c=0,l=d-i)),f=p,g=v,_=y),m=n,h=r}return c+=p,c>s?[l,d]:[a,o]}var ss={left:0,center:.5,right:1,top:0,middle:.5,hanging:.2,alphabetic:.8,ideographic:.8,bottom:1},cs={Circle:is,Default:ts,Image:ns,LineString:rs,Polygon:is,Text:class extends ts{constructor(e,t,n,r){super(e,t,n,r),this.labels_=null,this.text_=``,this.textOffsetX_=0,this.textOffsetY_=0,this.textRotateWithView_=void 0,this.textKeepUpright_=void 0,this.textRotation_=0,this.textFillState_=null,this.fillStates={},this.fillStates[ma]={fillStyle:ma},this.textStrokeState_=null,this.strokeStates={},this.textState_={},this.textStates={},this.textKey_=``,this.fillKey_=``,this.strokeKey_=``,this.declutterMode_=void 0,this.declutterImageWithText_=void 0}finish(){let e=super.finish();return e.textStates=this.textStates,e.fillStates=this.fillStates,e.strokeStates=this.strokeStates,e}drawText(e,t,n){let r=this.textFillState_,i=this.textStrokeState_,a=this.textState_;if(this.text_===``||!a||!r&&!i)return;let o=this.coordinates,s=o.length,c=e.getType(),l=null,u=e.getStride();if(a.placement===`line`&&(c==`LineString`||c==`MultiLineString`||c==`Polygon`||c==`MultiPolygon`)){if(!Ne(this.maxExtent,e.getExtent()))return;let r;if(l=e.getFlatCoordinates(),c==`LineString`)r=[l.length];else if(c==`MultiLineString`)r=e.getEnds();else if(c==`Polygon`)r=e.getEnds().slice(0,1);else if(c==`MultiPolygon`){let t=e.getEndss();r=[];for(let e=0,n=t.length;e{let r=o[(e+n)*2]===l[n*u]&&o[(e+n)*2+1]===l[n*u+1];return r||--e,r})}this.saveTextStates_();let d=a.backgroundFill?this.createFill(this.fillStyleToState(a.backgroundFill)):null,f=a.backgroundStroke?this.createStroke(this.strokeStyleToState(a.backgroundStroke)):null;this.beginGeometry(e,t,n);let p=a.padding;if(p!=xa&&(a.scale[0]<0||a.scale[1]<0)){let e=a.padding[0],t=a.padding[1],n=a.padding[2],r=a.padding[3];a.scale[0]<0&&(t=-t,r=-r),a.scale[1]<0&&(e=-e,n=-n),p=[e,t,n,r]}let m=this.pixelRatio;this.instructions.push([U.DRAW_IMAGE,s,i,null,NaN,NaN,NaN,1,0,0,this.textRotateWithView_,this.textRotation_,[1,1],NaN,this.declutterMode_,this.declutterImageWithText_,p==xa?xa:p.map(function(e){return e*m}),d,f,this.text_,this.textKey_,this.strokeKey_,this.fillKey_,this.textOffsetX_,this.textOffsetY_,r]);let h=1/m,g=d?d.slice(0):null;g&&(g[1]=ma),this.hitDetectionInstructions.push([U.DRAW_IMAGE,s,i,null,NaN,NaN,NaN,1,0,0,this.textRotateWithView_,this.textRotation_,[h,h],NaN,this.declutterMode_,this.declutterImageWithText_,p,g,f,this.text_,this.textKey_,this.strokeKey_,this.fillKey_?ma:this.fillKey_,this.textOffsetX_,this.textOffsetY_,r]),this.endGeometry(t)}}saveTextStates_(){let e=this.textStrokeState_,t=this.textState_,n=this.textFillState_,r=this.strokeKey_;e&&(r in this.strokeStates||(this.strokeStates[r]={strokeStyle:e.strokeStyle,lineCap:e.lineCap,lineDashOffset:e.lineDashOffset,lineWidth:e.lineWidth,lineJoin:e.lineJoin,miterLimit:e.miterLimit,lineDash:e.lineDash}));let i=this.textKey_;i in this.textStates||(this.textStates[i]={font:t.font,textAlign:t.textAlign||`center`,justify:t.justify,textBaseline:t.textBaseline||`middle`,scale:t.scale});let a=this.fillKey_;n&&(a in this.fillStates||(this.fillStates[a]={fillStyle:n.fillStyle}))}drawChars_(e,t){let n=this.textStrokeState_,r=this.textState_,i=this.strokeKey_,a=this.textKey_,o=this.fillKey_;this.saveTextStates_();let s=this.pixelRatio,c=ss[r.textBaseline],l=this.textOffsetY_*s,u=this.text_,d=n?n.lineWidth*Math.abs(r.scale[0])/2:0;this.instructions.push([U.DRAW_CHARS,e,t,c,r.overflow,o,r.maxAngle,s,l,i,d*s,u,a,1,this.declutterMode_,this.textKeepUpright_]),this.hitDetectionInstructions.push([U.DRAW_CHARS,e,t,c,r.overflow,o&&ma,r.maxAngle,s,l,i,d*s,u,a,1/s,this.declutterMode_,this.textKeepUpright_])}setTextStyle(e,t){let n,r,i;if(!e)this.text_=``;else{let t=e.getFill();t?(r=this.textFillState_,r||(r={},this.textFillState_=r),r.fillStyle=$i(t.getColor()||`#000`)):(r=null,this.textFillState_=r);let a=e.getStroke();if(!a)i=null,this.textStrokeState_=i;else{i=this.textStrokeState_,i||(i={},this.textStrokeState_=i);let e=a.getLineDash(),t=a.getLineDashOffset(),n=a.getWidth(),r=a.getMiterLimit();i.lineCap=a.getLineCap()||`round`,i.lineDash=e?e.slice():ga,i.lineDashOffset=t===void 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ks=class{constructor(e,t,n,r,i,a,o){this.maxExtent_=e,this.overlaps_=r,this.pixelRatio_=n,this.resolution_=t,this.renderBuffer_=a,this.executorsByZIndex_={},this.hitDetectionContext_=null,this.hitDetectionTransform_=Pn(),this.renderedContext_=null,this.deferredZIndexContexts_={},this.createExecutors_(i,o)}clip(e,t){let n=this.getClipCoords(t);e.beginPath(),e.moveTo(n[0],n[1]),e.lineTo(n[2],n[3]),e.lineTo(n[4],n[5]),e.lineTo(n[6],n[7]),e.clip()}createExecutors_(e,t){for(let n in e){let r=this.executorsByZIndex_[n];r===void 0&&(r={},this.executorsByZIndex_[n]=r);let i=e[n];for(let e in i){let n=i[e];r[e]=new Ss(this.resolution_,this.pixelRatio_,this.overlaps_,n,t)}}}hasExecutors(e){for(let t in this.executorsByZIndex_){let n=this.executorsByZIndex_[t];for(let t=0,r=e.length;t0){if(!a||n===`none`||p!==`Image`&&p!==`Text`||a.includes(e)){let n=(f[c]-3)/4,a=r-n%o,s=r-(n/o|0),l=i(e,t,a*a+s*s);if(l)return l}l.clearRect(0,0,o,o);break}}let 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e=this.map_.getOwnerDocument();this.dragListenerKeys_.push(a(e,$.POINTERMOVE,this.handlePointerMove_,this),a(e,$.POINTERUP,this.handlePointerUp_,this),a(this.element_,$.POINTERCANCEL,this.handlePointerUp_,this)),this.element_.getRootNode&&this.element_.getRootNode()!==e&&this.dragListenerKeys_.push(a(this.element_.getRootNode(),$.POINTERUP,this.handlePointerUp_,this))}}handlePointerMove_(e){if(this.isMoving_(e)){this.updateActivePointers_(e),this.dragging_=!0;let t=new Kl($.POINTERDRAG,this.map_,e,this.dragging_,void 0,this.activePointers_);this.dispatchEvent(t)}}relayMoveEvent_(e){this.originalPointerMoveEvent_=e;let t=!!(this.down_&&this.isMoving_(e));this.dispatchEvent(new Kl($.POINTERMOVE,this.map_,e,t))}handleTouchMove_(e){let t=this.originalPointerMoveEvent_;(!t||t.defaultPrevented)&&(typeof e.cancelable!=`boolean`||e.cancelable===!0)&&e.preventDefault()}isMoving_(e){return this.dragging_||Math.abs(e.clientX-this.down_.clientX)>this.moveTolerance_||Math.abs(e.clientY-this.down_.clientY)>this.moveTolerance_}disposeInternal(){this.relayedListenerKey_&&=(s(this.relayedListenerKey_),null),this.element_.removeEventListener(c.TOUCHMOVE,this.boundHandleTouchMove_),this.pointerdownListenerKey_&&=(s(this.pointerdownListenerKey_),null),this.dragListenerKeys_.forEach(s),this.dragListenerKeys_.length=0,this.element_=null,super.disposeInternal()}},Yl={POSTRENDER:`postrender`,MOVESTART:`movestart`,MOVEEND:`moveend`,LOADSTART:`loadstart`,LOADEND:`loadend`},Xl={LAYERGROUP:`layergroup`,SIZE:`size`,TARGET:`target`,VIEW:`view`},Zl=1/0,Ql=class{constructor(e,t){this.priorityFunction_=e,this.keyFunction_=t,this.elements_=[],this.priorities_=[],this.queuedElements_={}}clear(){this.elements_.length=0,this.priorities_.length=0,r(this.queuedElements_)}dequeue(){let e=this.elements_,t=this.priorities_,n=e[0];e.length==1?(e.length=0,t.length=0):(e[0]=e.pop(),t[0]=t.pop(),this.siftUp_(0));let r=this.keyFunction_(n);return delete this.queuedElements_[r],n}enqueue(e){M(!(this.keyFunction_(e)in this.queuedElements_),"Tried to enqueue an `element` that was already added to the queue");let t=this.priorityFunction_(e);return t==1/0?!1:(this.elements_.push(e),this.priorities_.push(t),this.queuedElements_[this.keyFunction_(e)]=!0,this.siftDown_(0,this.elements_.length-1),!0)}getCount(){return this.elements_.length}getLeftChildIndex_(e){return e*2+1}getRightChildIndex_(e){return e*2+2}getParentIndex_(e){return e-1>>1}heapify_(){let e;for(e=(this.elements_.length>>1)-1;e>=0;e--)this.siftUp_(e)}isEmpty(){return this.elements_.length===0}isKeyQueued(e){return e in this.queuedElements_}isQueued(e){return this.isKeyQueued(this.keyFunction_(e))}siftUp_(e){let t=this.elements_,n=this.priorities_,r=t.length,i=t[e],a=n[e],o=e;for(;e>1;){let i=this.getLeftChildIndex_(e),a=this.getRightChildIndex_(e),o=ae;){let e=this.getParentIndex_(t);if(r[e]>a)n[t]=n[e],r[t]=r[e],t=e;else break}n[t]=i,r[t]=a}reprioritize(){let e=this.priorityFunction_,t=this.elements_,n=this.priorities_,r=0,i=t.length,a,o,s;for(o=0;oe.apply(null,t),e=>e[0].getKey()),this.boundHandleTileChange_=this.handleTileChange.bind(this),this.tileChangeCallback_=t,this.tilesLoading_=0,this.tilesLoadingKeys_={}}enqueue(e){let t=super.enqueue(e);return t&&e[0].addEventListener(c.CHANGE,this.boundHandleTileChange_),t}getTilesLoading(){return this.tilesLoading_}handleTileChange(e){let t=e.target,n=t.getState();if(n===V.LOADED||n===V.ERROR||n===V.EMPTY){n!==V.ERROR&&t.removeEventListener(c.CHANGE,this.boundHandleTileChange_);let e=t.getKey();e in this.tilesLoadingKeys_&&(delete this.tilesLoadingKeys_[e],--this.tilesLoading_),this.tileChangeCallback_()}}loadMoreTiles(e,t){let n=0;for(;this.tilesLoading_0;){let e=this.dequeue()[0],t=e.getKey();e.getState()===V.IDLE&&!(t in this.tilesLoadingKeys_)&&(this.tilesLoadingKeys_[t]=!0,++this.tilesLoading_,++n,e.load())}}};function eu(e,t,n,r,i){if(!e||!(n in e.wantedTiles)||!e.wantedTiles[n][t.getKey()])return Zl;let a=e.viewState.center,o=r[0]-a[0],s=r[1]-a[1];return 65536*Math.log(i)+Math.sqrt(o*o+s*s)/i}var tu=class extends j{constructor(e){super();let t=e.element;t&&!e.target&&!t.style.pointerEvents&&(t.style.pointerEvents=`auto`),this.element=t||null,this.target_=null,this.map_=null,this.listenerKeys=[],e.render&&(this.render=e.render),e.target&&this.setTarget(e.target)}disposeInternal(){this.element?.remove(),super.disposeInternal()}getMap(){return this.map_}setMap(e){this.map_&&this.element?.remove();for(let e=0,t=this.listenerKeys.length;et.getAttributions(e)));if(this.attributions_!==void 0&&(Array.isArray(this.attributions_)?this.attributions_.forEach(e=>n.add(e)):n.add(this.attributions_)),!this.overrideCollapsible_){let e=!t.some(e=>e.getSource()?.getAttributionsCollapsible()===!1);this.setCollapsible(e)}return Array.from(n)}async updateElement_(e){if(!e){this.renderedVisible_&&=(this.element.style.display=`none`,!1);return}let t=await Promise.all(this.collectSourceAttributions_(e).map(e=>S(()=>e))),n=t.length>0;if(this.renderedVisible_!=n&&(this.element.style.display=n?``:`none`,this.renderedVisible_=n),!g(t,this.renderedAttributions_)){di(this.ulElement_);for(let e=0,n=t.length;e0&&t%(2*Math.PI)!=0?e.animate({rotation:0,duration:this.duration_,easing:ri}):e.setRotation(0))}render(e){let t=e.frameState;if(!t)return;let n=t.viewState.rotation;if(n!=this.rotation_){let e=`rotate(`+n+`rad)`;if(this.autoHide_){let e=this.element.classList.contains(aa);!e&&n===0?this.element.classList.add(aa):e&&n!==0&&this.element.classList.remove(aa)}this.label_.style.transform=e}this.rotation_=n}},iu=class extends tu{constructor(e){e||={},super({element:document.createElement(`div`),target:e.target});let t=e.className===void 0?`ol-zoom`:e.className,n=e.delta===void 0?1:e.delta,r=e.zoomInClassName===void 0?t+`-in`:e.zoomInClassName,i=e.zoomOutClassName===void 0?t+`-out`:e.zoomOutClassName,a=e.zoomInLabel===void 0?`+`:e.zoomInLabel,o=e.zoomOutLabel===void 0?`–`:e.zoomOutLabel,s=e.zoomInTipLabel===void 0?`Zoom in`:e.zoomInTipLabel,l=e.zoomOutTipLabel===void 0?`Zoom out`:e.zoomOutTipLabel,u=document.createElement(`button`);u.className=r,u.setAttribute(`type`,`button`),u.title=s,u.appendChild(typeof a==`string`?document.createTextNode(a):a),u.addEventListener(c.CLICK,this.handleClick_.bind(this,n),!1);let d=document.createElement(`button`);d.className=i,d.setAttribute(`type`,`button`),d.title=l,d.appendChild(typeof o==`string`?document.createTextNode(o):o),d.addEventListener(c.CLICK,this.handleClick_.bind(this,-n),!1);let f=t+` `+oa+` `+sa,p=this.element;p.className=f,p.appendChild(u),p.appendChild(d),this.duration_=e.duration===void 0?250:e.duration}handleClick_(e,t){t.preventDefault(),this.zoomByDelta_(e)}zoomByDelta_(e){let t=this.getMap().getView();if(!t)return;let n=t.getZoom();if(n!==void 0){let r=t.getConstrainedZoom(n+e);this.duration_>0?(t.getAnimating()&&t.cancelAnimations(),t.animate({zoom:r,duration:this.duration_,easing:ri})):t.setZoom(r)}}};function au(e){e||={};let t=new ne;return(e.zoom===void 0||e.zoom)&&t.push(new iu(e.zoomOptions)),(e.rotate===void 0||e.rotate)&&t.push(new ru(e.rotateOptions)),(e.attribution===void 0||e.attribution)&&t.push(new nu(e.attributionOptions)),t}var ou={ACTIVE:`active`},su=class extends j{constructor(e){super(),this.on,this.once,this.un,e&&e.handleEvent&&(this.handleEvent=e.handleEvent),this.map_=null,this.setActive(!0)}getActive(){return this.get(ou.ACTIVE)}getMap(){return this.map_}handleEvent(e){return!0}setActive(e){this.set(ou.ACTIVE,e)}setMap(e){this.map_=e}};function cu(e,t,n){let r=e.getCenterInternal();if(r){let i=[r[0]+t[0],r[1]+t[1]];e.animateInternal({duration:n===void 0?250:n,easing:ai,center:e.getConstrainedCenter(i)})}}function lu(e,t,n,r){let i=e.getZoom();if(i===void 0)return;let a=e.getConstrainedZoom(i+t),o=e.getResolutionForZoom(a);e.getAnimating()&&e.cancelAnimations(),e.animate({resolution:o,anchor:n,duration:r===void 0?250:r,easing:ri})}var uu=class extends su{constructor(e){super(),e||={},this.delta_=e.delta?e.delta:1,this.duration_=e.duration===void 0?250:e.duration}handleEvent(e){let t=!1;if(e.type==$.DBLCLICK){let n=e.originalEvent,r=e.map,i=e.coordinate,a=n.shiftKey?-this.delta_:this.delta_;lu(r.getView(),a,i,this.duration_),n.preventDefault(),t=!0}return!t}};function du(e){let t=arguments;return function(e){let n=!0;for(let r=0,i=t.length;r0}}else if(e.type==$.POINTERDOWN){let n=this.handleDownEvent(e);this.handlingDownUpSequence=n,t=this.stopDown(n)}else e.type==$.POINTERMOVE&&this.handleMoveEvent(e);return!t}handleMoveEvent(e){}handleUpEvent(e){return!1}stopDown(e){return e}updateTrackedPointers_(e){e.activePointers&&(this.targetPointers=e.activePointers)}};function wu(e){let t=e.length,n=0,r=0;for(let i=0;i0&&this.condition_(e)){let t=e.map.getView();return this.lastCentroid=null,t.getAnimating()&&t.cancelAnimations(),this.kinetic_&&this.kinetic_.begin(),this.noKinetic_=this.targetPointers.length>1,!0}return!1}},Eu=class extends Cu{constructor(e){e||={},super({stopDown:y}),this.condition_=e.condition?e.condition:fu,this.lastAngle_=void 0,this.duration_=e.duration===void 0?250:e.duration}handleDragEvent(e){if(!xu(e))return;let t=e.map,n=t.getView();if(n.getConstraints().rotation===El)return;let r=t.getSize(),i=e.pixel,a=Math.atan2(r[1]/2-i[1],i[0]-r[0]/2);if(this.lastAngle_!==void 0){let e=a-this.lastAngle_;n.adjustRotationInternal(-e)}this.lastAngle_=a}handleUpEvent(e){return xu(e)?(e.map.getView().endInteraction(this.duration_),!1):!0}handleDownEvent(e){return xu(e)&&gu(e)&&this.condition_(e)?(e.map.getView().beginInteraction(),this.lastAngle_=void 0,!0):!1}},Du=class extends l{constructor(e){super(),this.geometry_=null,this.element_=document.createElement(`div`),this.element_.style.position=`absolute`,this.element_.style.pointerEvents=`auto`,this.element_.className=`ol-box `+e,this.map_=null,this.startPixel_=null,this.endPixel_=null}disposeInternal(){this.setMap(null)}render_(){let e=this.startPixel_,t=this.endPixel_,n=this.element_.style;n.left=Math.min(e[0],t[0])+`px`,n.top=Math.min(e[1],t[1])+`px`,n.width=Math.abs(t[0]-e[0])+`px`,n.height=Math.abs(t[1]-e[1])+`px`}setMap(e){if(this.map_){this.map_.getOverlayContainer().removeChild(this.element_);let e=this.element_.style;e.left=`inherit`,e.top=`inherit`,e.width=`inherit`,e.height=`inherit`}this.map_=e,this.map_&&this.map_.getOverlayContainer().appendChild(this.element_)}setPixels(e,t){this.startPixel_=e,this.endPixel_=t,this.createOrUpdateGeometry(),this.render_()}createOrUpdateGeometry(){if(!this.map_)return;let e=this.startPixel_,t=this.endPixel_,n=[e,[e[0],t[1]],t,[t[0],e[1]]].map(this.map_.getCoordinateFromPixelInternal,this.map_);n[4]=n[0].slice(),this.geometry_?this.geometry_.setCoordinates([n]):this.geometry_=new Wr([n])}getGeometry(){return this.geometry_}},Ou={BOXSTART:`boxstart`,BOXDRAG:`boxdrag`,BOXEND:`boxend`,BOXCANCEL:`boxcancel`},ku=class extends C{constructor(e,t,n){super(e),this.coordinate=t,this.mapBrowserEvent=n}},Au=class extends Cu{constructor(e){super(),this.on,this.once,this.un,e??={},this.box_=new Du(e.className||`ol-dragbox`),this.minArea_=e.minArea??64,e.onBoxEnd&&(this.onBoxEnd=e.onBoxEnd),this.startPixel_=null,this.condition_=e.condition??gu,this.boxEndCondition_=e.boxEndCondition??this.defaultBoxEndCondition}defaultBoxEndCondition(e,t,n){let r=n[0]-t[0],i=n[1]-t[1];return r*r+i*i>=this.minArea_}getGeometry(){return this.box_.getGeometry()}handleDragEvent(e){this.startPixel_&&(this.box_.setPixels(this.startPixel_,e.pixel),this.dispatchEvent(new ku(Ou.BOXDRAG,e.coordinate,e)))}handleUpEvent(e){if(!this.startPixel_)return!1;let t=this.boxEndCondition_(e,this.startPixel_,e.pixel);return t&&this.onBoxEnd(e),this.dispatchEvent(new ku(t?Ou.BOXEND:Ou.BOXCANCEL,e.coordinate,e)),this.box_.setMap(null),this.startPixel_=null,!1}handleDownEvent(e){return this.condition_(e)?(this.startPixel_=e.pixel,this.box_.setMap(e.map),this.box_.setPixels(this.startPixel_,this.startPixel_),this.dispatchEvent(new ku(Ou.BOXSTART,e.coordinate,e)),!0):!1}onBoxEnd(e){}setActive(e){e||(this.box_.setMap(null),this.startPixel_&&=(this.dispatchEvent(new ku(Ou.BOXCANCEL,this.startPixel_,null)),null)),super.setActive(e)}setMap(e){this.getMap()&&(this.box_.setMap(null),this.startPixel_&&=(this.dispatchEvent(new ku(Ou.BOXCANCEL,this.startPixel_,null)),null)),super.setMap(e)}},ju=class extends Au{constructor(e){e||={};let t=e.condition?e.condition:yu;super({condition:t,className:e.className||`ol-dragzoom`,minArea:e.minArea}),this.duration_=e.duration===void 0?200:e.duration,this.out_=e.out!==void 0&&e.out}onBoxEnd(e){let t=this.getMap().getView(),n=this.getGeometry();if(this.out_){let e=t.rotatedExtentForGeometry(n),r=t.getResolutionForExtentInternal(e),i=t.getResolution()/r;n=n.clone(),n.scale(i*i)}t.fitInternal(n,{duration:this.duration_,easing:ri})}},Mu={LEFT:`ArrowLeft`,UP:`ArrowUp`,RIGHT:`ArrowRight`,DOWN:`ArrowDown`},Nu=class extends su{constructor(e){super(),e||={},this.defaultCondition_=function(e){return _u(e)&&bu(e)},this.condition_=e.condition===void 0?this.defaultCondition_:e.condition,this.duration_=e.duration===void 0?100:e.duration,this.pixelDelta_=e.pixelDelta===void 0?128:e.pixelDelta}handleEvent(e){let t=!1;if(e.type==c.KEYDOWN){let n=e.originalEvent,r=n.key;if(this.condition_(e)&&(r==Mu.DOWN||r==Mu.LEFT||r==Mu.RIGHT||r==Mu.UP)){let i=e.map.getView(),a=i.getResolution()*this.pixelDelta_,o=0,s=0;r==Mu.DOWN?s=-a:r==Mu.LEFT?o=-a:r==Mu.RIGHT?o=a:s=a;let c=[o,s];nt(c,i.getRotation()),cu(i,c,this.duration_),n.preventDefault(),t=!0}}return!t}},Pu=class extends su{constructor(e){super(),e||={},this.condition_=e.condition?e.condition:function(e){return!vu(e)&&bu(e)},this.delta_=e.delta?e.delta:1,this.duration_=e.duration===void 0?100:e.duration}handleEvent(e){let t=!1;if(e.type==c.KEYDOWN||e.type==c.KEYPRESS){let n=e.originalEvent,r=n.key;if(this.condition_(e)&&(r===`+`||r===`-`)){let i=e.map,a=r===`+`?this.delta_:-this.delta_;lu(i.getView(),a,void 0,this.duration_),n.preventDefault(),t=!0}}return!t}},Fu=40,Iu=300,Lu=3,Ru=class extends su{constructor(e){e||={},super(e),this.totalDelta_=0,this.lastDelta_=0,this.maxDelta_=e.maxDelta===void 0?1:e.maxDelta,this.duration_=e.duration===void 0?250:e.duration,this.timeout_=e.timeout===void 0?80:e.timeout,this.useAnchor_=e.useAnchor===void 0||e.useAnchor,this.constrainResolution_=e.constrainResolution!==void 0&&e.constrainResolution;let t=e.condition?e.condition:hu;this.condition_=e.onFocusOnly?du(mu,t):t,this.lastAnchor_=null,this.startTime_=void 0,this.timeoutId_,this.mode_=void 0,this.trackpadEventGap_=400,this.trackpadTimeoutId_,this.deltaPerZoom_=300,this.ctrlKeyPressed_=!1,this.ctrlKeyListenerKeys_=[]}setMap(e){if(this.ctrlKeyListenerKeys_.forEach(s),this.ctrlKeyListenerKeys_.length=0,this.ctrlKeyPressed_=!1,super.setMap(e),e){let t=e.getOwnerDocument();this.ctrlKeyListenerKeys_.push(a(t,`keydown`,e=>{e.key===`Control`&&(this.ctrlKeyPressed_=!0)}),a(t,`keyup`,e=>{e.key===`Control`&&(this.ctrlKeyPressed_=!1)}))}}endInteraction_(){this.trackpadTimeoutId_=void 0;let e=this.getMap();if(!e)return;let t=e.getView(),n=this.lastDelta_?this.lastDelta_>0?1:-1:0;t.endInteraction(this.constrainResolution_||t.getConstrainResolution()?100:void 0,n,this.lastAnchor_?e.getCoordinateFromPixel(this.lastAnchor_):null)}handleEvent(e){if(!this.condition_(e)||e.type!==c.WHEEL)return!0;let t=e.map,n=e.originalEvent;n.preventDefault();let r=n.ctrlKey&&!this.ctrlKeyPressed_;n.ctrlKey||(this.ctrlKeyPressed_=!1),this.useAnchor_&&(this.lastAnchor_=e.pixel);let i=n.deltaY;switch(n.deltaMode){case WheelEvent.DOM_DELTA_LINE:i*=Fu;break;case WheelEvent.DOM_DELTA_PAGE:i*=Iu;break;default:}if(i===0)return!1;this.lastDelta_=i;let a=Date.now();this.startTime_===void 0&&(this.startTime_=a),(!this.mode_||a-this.startTime_>this.trackpadEventGap_)&&(this.mode_=Math.abs(i)<4?`trackpad`:`wheel`);let o=t.getView();if(this.mode_===`trackpad`)return this.trackpadTimeoutId_?clearTimeout(this.trackpadTimeoutId_):(o.getAnimating()&&o.cancelAnimations(),o.beginInteraction()),this.trackpadTimeoutId_=setTimeout(this.endInteraction_.bind(this),this.timeout_),r&&(i*=Lu),o.adjustZoom(-i/this.deltaPerZoom_,this.lastAnchor_?t.getCoordinateFromPixel(this.lastAnchor_):null),this.startTime_=a,!1;this.totalDelta_+=i;let s=Math.max(this.timeout_-(a-this.startTime_),0);return clearTimeout(this.timeoutId_),this.timeoutId_=setTimeout(this.handleWheelZoom_.bind(this,t),s),!1}handleWheelZoom_(e){let t=e.getView();t.getAnimating()&&t.cancelAnimations();let n=-L(this.totalDelta_,-this.maxDelta_*this.deltaPerZoom_,this.maxDelta_*this.deltaPerZoom_)/this.deltaPerZoom_;(t.getConstrainResolution()||this.constrainResolution_)&&(n=n?n>0?1:-1:0),lu(t,n,this.lastAnchor_?e.getCoordinateFromPixel(this.lastAnchor_):null,this.duration_),this.mode_=void 0,this.totalDelta_=0,this.lastAnchor_=null,this.startTime_=void 0,this.timeoutId_=void 0}setMouseAnchor(e){this.useAnchor_=e,e||(this.lastAnchor_=null)}},zu=class extends Cu{constructor(e){e||={};let t=e;t.stopDown||=y,super(t),this.anchor_=null,this.lastAngle_=void 0,this.rotating_=!1,this.rotationDelta_=0,this.threshold_=e.threshold===void 0?.3:e.threshold,this.duration_=e.duration===void 0?250:e.duration}handleDragEvent(e){let t=0,n=this.targetPointers[0],r=this.targetPointers[1],i=Math.atan2(r.clientY-n.clientY,r.clientX-n.clientX);if(this.lastAngle_!==void 0){let e=i-this.lastAngle_;this.rotationDelta_+=e,!this.rotating_&&Math.abs(this.rotationDelta_)>this.threshold_&&(this.rotating_=!0),t=e}this.lastAngle_=i;let a=e.map,o=a.getView();o.getConstraints().rotation!==El&&(this.anchor_=a.getCoordinateFromPixelInternal(a.getEventPixel(wu(this.targetPointers))),this.rotating_&&(a.render(),o.adjustRotationInternal(t,this.anchor_)))}handleUpEvent(e){return this.targetPointers.length<2?(e.map.getView().endInteraction(this.duration_),!1):!0}handleDownEvent(e){if(this.targetPointers.length>=2){let t=e.map;return this.anchor_=null,this.lastAngle_=void 0,this.rotating_=!1,this.rotationDelta_=0,this.handlingDownUpSequence||t.getView().beginInteraction(),!0}return!1}},Bu=class extends Cu{constructor(e){e||={};let t=e;t.stopDown||=y,super(t),this.anchor_=null,this.duration_=e.duration===void 0?400:e.duration,this.lastDistance_=void 0,this.lastScaleDelta_=1}handleDragEvent(e){let t=1,n=this.targetPointers[0],r=this.targetPointers[1],i=n.clientX-r.clientX,a=n.clientY-r.clientY,o=Math.sqrt(i*i+a*a);this.lastDistance_!==void 0&&(t=this.lastDistance_/o),this.lastDistance_=o;let s=e.map,c=s.getView();t!=1&&(this.lastScaleDelta_=t),this.anchor_=s.getCoordinateFromPixelInternal(s.getEventPixel(wu(this.targetPointers))),s.render(),c.adjustResolutionInternal(t,this.anchor_)}handleUpEvent(e){if(this.targetPointers.length<2){let t=e.map.getView(),n=this.lastScaleDelta_>1?1:-1;return t.endInteraction(this.duration_,n),!1}return!0}handleDownEvent(e){if(this.targetPointers.length>=2){let t=e.map;return this.anchor_=null,this.lastDistance_=void 0,this.lastScaleDelta_=1,this.handlingDownUpSequence||t.getView().beginInteraction(),!0}return!1}};function Vu(e){e||={};let t=new ne,n=new _i(-.005,.05,100);return(e.altShiftDragRotate===void 0||e.altShiftDragRotate)&&t.push(new Eu),(e.doubleClickZoom===void 0||e.doubleClickZoom)&&t.push(new uu({delta:e.zoomDelta,duration:e.zoomDuration})),(e.dragPan===void 0||e.dragPan)&&t.push(new Tu({onFocusOnly:e.onFocusOnly,kinetic:n})),(e.pinchRotate===void 0||e.pinchRotate)&&t.push(new zu),(e.pinchZoom===void 0||e.pinchZoom)&&t.push(new Bu({duration:e.zoomDuration})),(e.keyboard===void 0||e.keyboard)&&(t.push(new Nu),t.push(new Pu({delta:e.zoomDelta,duration:e.zoomDuration}))),(e.mouseWheelZoom===void 0||e.mouseWheelZoom)&&t.push(new Ru({onFocusOnly:e.onFocusOnly,duration:e.zoomDuration})),(e.shiftDragZoom===void 0||e.shiftDragZoom)&&t.push(new ju({duration:e.zoomDuration})),t}var Hu={ADDLAYER:`addlayer`,REMOVELAYER:`removelayer`},Uu=class extends C{constructor(e,t){super(e),this.layer=t}},Wu={LAYERS:`layers`},Gu=class e extends Rl{constructor(e){e||={};let t=Object.assign({},e);delete t.layers;let n=e.layers;super(t),this.on,this.once,this.un,this.layersListenerKeys_=[],this.listenerKeys_={},this.addChangeListener(Wu.LAYERS,this.handleLayersChanged_),n?Array.isArray(n)?n=new ne(n.slice(),{unique:!0}):M(typeof n.getArray==`function`,"Expected `layers` to be an array or a `Collection`"):n=new ne(void 0,{unique:!0}),this.setLayers(n)}handleLayerChange_(){this.changed()}handleLayersChanged_(){this.layersListenerKeys_.forEach(s),this.layersListenerKeys_.length=0;let e=this.getLayers();this.layersListenerKeys_.push(a(e,t.ADD,this.handleLayersAdd_,this),a(e,t.REMOVE,this.handleLayersRemove_,this));for(let e in this.listenerKeys_)this.listenerKeys_[e].forEach(s);r(this.listenerKeys_);let n=e.getArray();for(let e=0,t=n.length;e=0;--i){let a=m[i],d=a.layer;if(d.hasRenderer()&&Bl(a,l)&&o.call(s,d)){let i=d.getRenderer(),o=d.getSource();if(i&&o){let s=o.getWrapX()?f:e,l=u.bind(null,a.managed);_[0]=s[0]+p[r][0],_[1]=s[1]+p[r][1],c=i.forEachFeatureAtCoordinate(_,t,n,l,g)}if(c)return c}}if(g.length===0)return;let v=1/g.length;return g.forEach((e,t)=>e.distanceSq+=t*v),g.sort((e,t)=>e.distanceSq-t.distanceSq),g.some(e=>c=e.callback(e.feature,e.layer,e.geometry)),c}hasFeatureAtCoordinate(e,t,n,r,i,a){return this.forEachFeatureAtCoordinate(e,t,n,r,v,this,i,a)!==void 0}getMap(){return this.map_}renderFrame(e){D()}scheduleExpireIconCache(e){Yi.canExpireCache()&&e.postRenderFunctions.push(qu)}};function qu(e,t){Yi.expire()}var Ju=class extends Ku{constructor(e){super(e),this.fontChangeListenerKey_=a(Sa,n.PROPERTYCHANGE,e.redrawText,e),this.element_=Xr?pi():document.createElement(`div`);let t=this.element_.style;t.position=`absolute`,t.width=`100%`,t.height=`100%`,t.zIndex=`0`,this.element_.className=oa+` ol-layers`;let r=e.getViewport();r&&r.insertBefore(this.element_,r.firstChild||null),this.children_=[],this.renderedVisible_=!0}dispatchRenderEvent(e,t){let n=this.getMap();if(n.hasListener(e)){let r=new Ls(e,void 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r=t[n];if(!(r.getMap()!==this||!r.getActive()||!this.getTargetElement())&&(!r.handleEvent(e)||e.propagationStopped))break}}}handlePostRender(){let e=this.frameState_,t=this.tileQueue_;if(!t.isEmpty()){let n=this.maxTilesLoading_,r=n,i=e?e.viewHints:void 0,a=i?i[Xo.ANIMATING]||i[Xo.INTERACTING]:!1;if(a){let t=Date.now()-e.time>8;n=t?0:8,r=t?0:2}t.getTilesLoading(){this.postRenderTimeoutHandle_=void 0,this.handlePostRender()},0)}setLayerGroup(e){let t=this.getLayerGroup();t&&this.handleLayerRemove_(new Uu(`removelayer`,t)),this.set(Xl.LAYERGROUP,e)}setSize(e){this.set(Xl.SIZE,e)}setTarget(e){this.set(Xl.TARGET,e)}setView(e){if(!e||e instanceof jl){this.set(Xl.VIEW,e);return}this.set(Xl.VIEW,new jl);let t=this;e.then(function(e){t.setView(new jl(e))})}updateSize(){let e=this.getTargetElement(),t;if(e){let n,r;if(mi(e)){let t=e.getContext(`2d`).getTransform();n=e.width/t.a,r=e.height/t.d}else{let t=getComputedStyle(e);n=e.offsetWidth-parseFloat(t.borderLeftWidth)-parseFloat(t.paddingLeft)-parseFloat(t.paddingRight)-parseFloat(t.borderRightWidth),r=e.offsetHeight-parseFloat(t.borderTopWidth)-parseFloat(t.paddingTop)-parseFloat(t.paddingBottom)-parseFloat(t.borderBottomWidth)}!isNaN(n)&&!isNaN(r)&&(t=[Math.max(0,n),Math.max(0,r)],!Lo(t)&&(e.offsetWidth||e.offsetHeight||e.getClientRects().length)&&$e(`No map visible because the map container's width or height are 0.`))}let n=this.getSize();t&&(!n||!g(t,n))&&(this.updateViewportSize_(t),this.setSize(t))}updateViewportSize_(e){let t=this.getView();t&&t.setViewportSize(e)}};function Qu(e){let t=null;e.keyboardEventTarget!==void 0&&(t=typeof e.keyboardEventTarget==`string`?document.getElementById(e.keyboardEventTarget):e.keyboardEventTarget);let n={},r=e.layers&&typeof e.layers.getLayers==`function`?e.layers:new Gu({layers:e.layers});n[Xl.LAYERGROUP]=r,n[Xl.TARGET]=e.target,n[Xl.VIEW]=e.view instanceof jl?e.view:new jl;let i;e.controls!==void 0&&(Array.isArray(e.controls)?i=new ne(e.controls.slice()):(M(typeof e.controls.getArray==`function`,"Expected `controls` to be an array or an `ol/Collection.js`"),i=e.controls));let a;e.interactions!==void 0&&(Array.isArray(e.interactions)?a=new ne(e.interactions.slice()):(M(typeof e.interactions.getArray==`function`,"Expected `interactions` to be an array or an `ol/Collection.js`"),a=e.interactions));let o;return e.overlays===void 0?o=new ne:Array.isArray(e.overlays)?o=new ne(e.overlays.slice()):(M(typeof e.overlays.getArray==`function`,"Expected `overlays` to be an array or an `ol/Collection.js`"),o=e.overlays),{controls:i,interactions:a,keyboardEventTarget:t,overlays:o,values:n}}var $u=class{constructor(e,t,n,r){this.minX=e,this.maxX=t,this.minY=n,this.maxY=r}contains(e){return this.containsXY(e[1],e[2])}containsTileRange(e){return this.minX<=e.minX&&e.maxX<=this.maxX&&this.minY<=e.minY&&e.maxY<=this.maxY}containsXY(e,t){return 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r=Math.min(n[0][0],n[1][0],n[2][0]);Math.max(n[0][0],n[1][0],n[2][0])-r.5&&u<1,p=!1;if(c>0&&(this.targetProj_.isGlobal()&&this.targetWorldWidth_&&(p=I(ae([e,t,n,r]))/this.targetWorldWidth_>Hd||p),!f&&this.sourceProj_.isGlobal()&&u&&(p=u>Hd||p)),!p&&this.maxSourceExtent_&&isFinite(l[0])&&isFinite(l[1])&&isFinite(l[2])&&isFinite(l[3])&&!Ne(l,this.maxSourceExtent_))return;let m=0;if(!p&&(!isFinite(i[0])||!isFinite(i[1])||!isFinite(a[0])||!isFinite(a[1])||!isFinite(o[0])||!isFinite(o[1])||!isFinite(s[0])||!isFinite(s[1]))){if(c>0)p=!0;else if(m=(!isFinite(i[0])||!isFinite(i[1])?8:0)+(!isFinite(a[0])||!isFinite(a[1])?4:0)+(!isFinite(o[0])||!isFinite(o[1])?2:0)+ +(!isFinite(s[0])||!isFinite(s[1])),m!=1&&m!=2&&m!=4&&m!=8)return}if(c>0){if(!p){let t=[(e[0]+n[0])/2,(e[1]+n[1])/2],r=this.transformInv_(t),a;a=f?(We(i[0],d)+We(o[0],d))/2-We(r[0],d):(i[0]+o[0])/2-r[0];let s=(i[1]+o[1])/2-r[1];p=a*a+s*s>this.errorThresholdSquared_}if(p){if(Math.abs(e[0]-n[0])<=Math.abs(e[1]-n[1])){let 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0&&u,this.pixelRatio_=o,this.gutter_=s,this.canvas_=null,this.sourceTileGrid_=t,this.targetTileGrid_=r,this.wrappedTileCoord_=a||i,this.sourceTiles_=[],this.sourcesListenerKeys_=null,this.sourceZ_=0,this.clipExtent_=e.canWrapX()?e.getExtent():void 0;let f=r.getTileCoordExtent(this.wrappedTileCoord_),p=this.targetTileGrid_.getExtent(),m=this.sourceTileGrid_.getExtent(),h=p?Ae(f,p):f;if(Ce(h)===0){this.state=V.EMPTY;return}let g=e.getExtent();g&&(m=m?Ae(m,g):g);let _=r.getResolution(this.wrappedTileCoord_[0]),v=zd(e,n,h,_);if(!isFinite(v)||v<=0){this.state=V.EMPTY;return}let y=l===void 0?Wd:l;if(this.triangulation_=new Ud(e,n,h,m,v*y,_),this.triangulation_.getTriangles().length===0){this.state=V.EMPTY;return}this.sourceZ_=t.getZForResolution(v);let b=this.triangulation_.calculateSourceExtent();if(m&&(e.canWrapX()?(b[1]=L(b[1],m[1],m[3]),b[3]=L(b[3],m[1],m[3])):b=Ae(b,m)),!Ce(b))this.state=V.EMPTY;else{let n=0,r=0;e.canWrapX()&&(n=I(g),r=Math.floor((b[0]-g[0])/n)),Re(b.slice(),e,!0).forEach(e=>{let i=t.getTileRangeForExtentAndZ(e,this.sourceZ_);for(let e=i.minX;e<=i.maxX;e++)for(let t=i.minY;t<=i.maxY;t++){let i=r*n;this.sourceTiles_.push({getTile:()=>c(this.sourceZ_,e,t,o),offset:i})}++r}),this.sourceTiles_.length===0&&(this.state=V.EMPTY)}}getImage(){return this.canvas_}reproject_(){let e=[];if(this.sourceTiles_.forEach(t=>{let n=t.tile;if(n&&n.getState()==V.LOADED){let r=this.sourceTileGrid_.getTileCoordExtent(n.tileCoord);r[0]+=t.offset,r[2]+=t.offset;let i=this.clipExtent_?.slice();i&&(i[0]+=t.offset,i[2]+=t.offset),e.push({extent:r,clipExtent:i,image:n.getImage()})}}),this.sourceTiles_.length=0,e.length===0)this.state=V.ERROR;else{let t=this.wrappedTileCoord_[0],n=this.targetTileGrid_.getTileSize(t),r=typeof n==`number`?n:n[0],i=typeof 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i=t.getState();(i==V.LOADED||i==V.ERROR||i==V.EMPTY)&&(s(n),e--,e===0&&(this.unlistenSources_(),this.reproject_()))});this.sourcesListenerKeys_.push(n)}}),e===0?setTimeout(this.reproject_.bind(this),0):this.sourceTiles_.forEach(function({tile:e},t,n){e.getState()==V.IDLE&&e.load()})}}unlistenSources_(){this.sourcesListenerKeys_.forEach(s),this.sourcesListenerKeys_=null}release(){this.canvas_&&=(li(this.canvas_.getContext(`2d`)),Pd.push(this.canvas_),null),this.sourceTiles_.length=0,super.release()}},Kd=class{constructor(e){this.highWaterMark=e===void 0?2048:e,this.count_=0,this.entries_={},this.oldest_=null,this.newest_=null}deleteOldest(){let e=this.pop();e instanceof l&&e.dispose()}canExpireCache(){return this.highWaterMark>0&&this.getCount()>this.highWaterMark}expireCache(e){for(;this.canExpireCache();)this.deleteOldest()}clear(){for(;this.oldest_;)this.deleteOldest()}containsKey(e){return this.entries_.hasOwnProperty(e)}forEach(e){let 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e}peekLast(){return this.oldest_.value_}peekLastKey(){return this.oldest_.key_}peekFirstKey(){return this.newest_.key_}peek(e){return this.entries_[e]?.value_}pop(){let e=this.oldest_;return delete this.entries_[e.key_],e.newer&&(e.newer.older=null),this.oldest_=e.newer,this.oldest_||(this.newest_=null),--this.count_,e.value_}replace(e,t){this.get(e),this.entries_[e].value_=t}set(e,t){M(!(e in this.entries_),`Tried to set a value for a key that is used already`);let n={key_:e,newer:null,older:this.newest_,value_:t};this.newest_?this.newest_.newer=n:this.oldest_=n,this.newest_=n,this.entries_[e]=n,++this.count_}setSize(e){this.highWaterMark=e}};function qd(e,t,n,r){return r===void 0?[e,t,n]:(r[0]=e,r[1]=t,r[2]=n,r)}function Jd(e,t,n){return e+`/`+t+`/`+n}function Yd(e,t,n,r,i){return`${k(e)},${t},${Jd(n,r,i)}`}function Xd(e){return Zd(e[0],e[1],e[2])}function Zd(e,t,n){return(t<n||n>t.getMaxZoom())return!1;let a=t.getFullTileRange(n);return!a||a.containsXY(r,i)}function $d(e,t,n){if(!(n in e))return e[n]=new Set([t]),!0;let r=e[n],i=r.has(t);return i||r.add(t),!i}function ef(e,t,n){let r=e[n];return r?r.delete(t):!1}function tf(e,t){let n=e.layerStatesArray[e.layerIndex];n.extent&&(t=Ae(t,jn(n.extent,e.viewState.projection)));let r=n.layer.getRenderSource();if(!r.getWrapX()){let n=r.getTileGridForProjection(e.viewState.projection).getExtent();n&&(t=Ae(t,n))}return t}var nf=class extends Us{constructor(e,t){super(e),t||={},this.extentChanged=!0,this.renderComplete=!1,this.renderedExtent_=null,this.renderedPixelRatio,this.renderedProjection=null,this.renderedTiles=[],this.renderedSourceKey_,this.renderedSourceRevision_,this.tempExtent=P(),this.tempTileRange_=new $u(0,0,0,0),this.tempTileCoord_=qd(0,0,0);let n=t.cacheSize===void 0?512:t.cacheSize;this.tileCache_=new Kd(n),this.sourceTileCache_=null,this.layerExtent=null,this.maxStaleKeys=n*.5}getTileCache(){return this.tileCache_}getSourceTileCache(){return this.sourceTileCache_||=new 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u=e.wantedTiles[l],d=o.getMapInternal(),f=Math.max(n-i,c.getMinZoom(),c.getZForResolution(Math.min(o.getMaxResolution(),d?d.getView().getResolutionForZoom(Math.max(o.getMinZoom(),0)):c.getResolution(0)),s.zDirection)),p=a.rotation,m=p?ke(a.center,a.resolution,p,e.size):void 0;for(let i=n;i>=f;--i){let n=c.getTileRangeForExtentAndZ(t,i,this.tempTileRange_),a=c.getResolution(i);for(let t=n.minX;t<=n.maxX;++t)for(let o=n.minY;o<=n.maxY;++o){if(p&&!c.tileCoordIntersectsViewport([i,t,o],m))continue;let n=this.getTile(i,t,o,e);if(!n||!$d(r,n,i))continue;let s=n.getKey();if(u[s]=!0,n.getState()===V.IDLE&&!e.tileQueue.isKeyQueued(s)){let r=qd(i,t,o,this.tempTileCoord_);e.tileQueue.enqueue([n,l,c.getTileCoordCenter(r),a])}}}}findStaleTile_(e,t){let n=this.tileCache_,r=e[0],i=e[1],a=e[2],o=this.getStaleKeys();for(let e=0;e0&&setTimeout(()=>{this.enqueueTiles(e,w,f-1,S,C-1)},0),!(f in S))return this.container;let T=k(this),E=e.time;for(let t of S[f]){let n=t.getState();if(n===V.EMPTY)continue;let r=t.tileCoord;if(n===V.LOADED&&t.getAlpha(T,E)===1){t.endTransition(T);continue}if(n!==V.ERROR&&(this.renderComplete=!1),this.findStaleTile_(r,S)){ef(S,t,f),e.animate=!0;continue}if(this.findAltTiles_(u,r,f+1,S))continue;let i=u.getMinZoom();for(let e=f-1;e>=i&&!this.findAltTiles_(u,r,e,S);--e);}let D=p/a*s/g,O=this.getRenderContext(e);In(this.tempTransform,_/2,v/2,D,D,0,-_/2,-v/2),this.layerExtent&&this.clipUnrotated(O,e,this.layerExtent),l.getInterpolate()||(O.imageSmoothingEnabled=!1),this.preRender(O,e);let A=Object.keys(S).map(Number);A.sort(d);let j,ee=[],te=[];for(let t=A.length-1;t>=0;--t){let n=A[t],r=l.getTilePixelSize(n,s,i),a=u.getResolution(n)/p,o=r[0]*a*D,c=r[1]*a*D,d=u.getTileCoordForCoordAndZ(je(x),n),f=u.getTileCoordExtent(d),m=z(this.tempTransform,[g*(f[0]-x[0])/p,g*(x[3]-f[3])/p]),h=g*l.getGutterForProjection(i);for(let t of S[n]){if(t.getState()!==V.LOADED)continue;let r=t.tileCoord,i=d[1]-r[1],a=Math.round(m[0]-(i-1)*o),s=d[2]-r[2],u=Math.round(m[1]-(s-1)*c),f=Math.round(m[0]-i*o),p=Math.round(m[1]-s*c),g=a-f,_=u-p,v=A.length===1,y=!1;j=[f,p,f+g,p,f+g,p+_,f,p+_];for(let e=0,t=ee.length;e{let n=k(l),r=t.wantedTiles[n],i=r?Object.keys(r).length:0;this.updateCacheSize(i),this.tileCache_.expireCache(),this.sourceTileCache_?.expireCache()}),this.container}updateCacheSize(e){this.tileCache_.highWaterMark=Math.max(this.tileCache_.highWaterMark,e*2)}drawTile(e,t,n,r,i,a,o,s){let c;if(e instanceof Md){if(c=kd(e.getData()),!c)throw Error(`Rendering array data is not yet supported`)}else c=this.getTileImage(e);if(!c)return;let l=this.getRenderContext(t),u=k(this),d=t.layerStatesArray[t.layerIndex],f=d.opacity*(s?e.getAlpha(u,t.time):1),p=f!==l.globalAlpha;p&&(l.save(),l.globalAlpha=f),l.drawImage(c,o,o,c.width-2*o,c.height-2*o,n,r,i,a),p&&l.restore(),f===d.opacity?s&&e.endTransition(u):t.animate=!0}getImage(){let e=this.context;return e?e.canvas:null}getTileImage(e){return e.getImage()}updateUsedTiles(e,t,n){let r=k(t);r in e||(e[r]={}),e[r][n.getKey()]=!0}},rf={PRELOAD:`preload`,USE_INTERIM_TILES_ON_ERROR:`useInterimTilesOnError`},af=class extends zl{constructor(e){e||={};let t=Object.assign({},e),n=e.cacheSize;delete e.cacheSize,delete t.preload,delete t.useInterimTilesOnError,super(t),this.on,this.once,this.un,this.cacheSize_=n,this.setPreload(e.preload===void 0?0:e.preload),this.setUseInterimTilesOnError(e.useInterimTilesOnError===void 0||e.useInterimTilesOnError)}getCacheSize(){return this.cacheSize_}getPreload(){return this.get(rf.PRELOAD)}setPreload(e){this.set(rf.PRELOAD,e)}getUseInterimTilesOnError(){return this.get(rf.USE_INTERIM_TILES_ON_ERROR)}setUseInterimTilesOnError(e){this.set(rf.USE_INTERIM_TILES_ON_ERROR,e)}getData(e){return super.getData(e)}},of=class extends af{constructor(e){super(e)}createRenderer(){return new 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this.width_}setColor(e){this.color_=e}setLineCap(e){this.lineCap_=e}setLineDash(e){this.lineDash_=e}setLineDashOffset(e){this.lineDashOffset_=e}setLineJoin(e){this.lineJoin_=e}setMiterLimit(e){this.miterLimit_=e}setOffset(e){this.offset_=e}setWidth(e){this.width_=e}};function Lo(e){return e[0]>0&&e[1]>0}function Ro(e,t,n){return n===void 0&&(n=[0,0]),n[0]=e[0]*t+.5|0,n[1]=e[1]*t+.5|0,n}function zo(e,t){return Array.isArray(e)?e:(t===void 0?t=[e,e]:(t[0]=e,t[1]=e),t)}var Bo=class e{constructor(e){this.opacity_=e.opacity,this.rotateWithView_=e.rotateWithView,this.rotation_=e.rotation,this.scale_=e.scale,this.scaleArray_=zo(e.scale),this.displacement_=e.displacement,this.declutterMode_=e.declutterMode}clone(){let t=this.getScale();return new e({opacity:this.getOpacity(),scale:Array.isArray(t)?t.slice():t,rotation:this.getRotation(),rotateWithView:this.getRotateWithView(),displacement:this.getDisplacement().slice(),declutterMode:this.getDeclutterMode()})}getOpacity(){return this.opacity_}getRotateWithView(){return this.rotateWithView_}getRotation(){return this.rotation_}getScale(){return this.scale_}getScaleArray(){return this.scaleArray_}getDisplacement(){return this.displacement_}getDeclutterMode(){return this.declutterMode_}getAnchor(){return D()}getImage(e){return D()}getHitDetectionImage(){return D()}getPixelRatio(e){return 1}getImageState(){return D()}getImageSize(){return D()}getOrigin(){return D()}getSize(){return D()}setDisplacement(e){this.displacement_=e}setOpacity(e){this.opacity_=e}setRotateWithView(e){this.rotateWithView_=e}setRotation(e){this.rotation_=e}setScale(e){this.scale_=e,this.scaleArray_=zo(e)}listenImageChange(e){D()}load(){D()}unlistenImageChange(e){D()}ready(){return Promise.resolve()}},Vo=class e extends Bo{constructor(e){super({opacity:1,rotateWithView:e.rotateWithView===void 0?!1:e.rotateWithView,rotation:e.rotation===void 0?0:e.rotation,scale:e.scale===void 0?1:e.scale,displacement:e.displacement===void 0?[0,0]:e.displacement,declutterMode:e.declutterMode}),this.hitDetectionCanvas_=null,this.fill_=e.fill===void 0?null:e.fill,this.origin_=[0,0],this.points_=e.points,this.radius=e.radius,this.radius2_=e.radius2,this.angle_=e.angle===void 0?0:e.angle,this.stroke_=e.stroke===void 0?null:e.stroke,this.size_,this.renderOptions_,this.imageState_=this.fill_&&this.fill_.loading()?B.LOADING:B.LOADED,this.imageState_===B.LOADING&&this.ready().then(()=>this.imageState_=B.LOADED),this.render()}clone(){let t=this.getScale(),n=new e({fill:this.getFill()?this.getFill().clone():void 0,points:this.getPoints(),radius:this.getRadius(),radius2:this.getRadius2(),angle:this.getAngle(),stroke:this.getStroke()?this.getStroke().clone():void 0,rotation:this.getRotation(),rotateWithView:this.getRotateWithView(),scale:Array.isArray(t)?t.slice():t,displacement:this.getDisplacement().slice(),declutterMode:this.getDeclutterMode()});return n.setOpacity(this.getOpacity()),n}getAnchor(){let e=this.size_,t=this.getDisplacement(),n=this.getScaleArray();return[e[0]/2-t[0]/n[0],e[1]/2+t[1]/n[1]]}getAngle(){return this.angle_}getFill(){return this.fill_}setFill(e){this.fill_=e,this.render()}getHitDetectionImage(){return this.hitDetectionCanvas_||=this.createHitDetectionCanvas_(this.renderOptions_),this.hitDetectionCanvas_}getImage(e){let t=this.fill_?.getKey(),n=`${e},${this.angle_},${this.radius},${this.radius2_},${this.points_},${t}`+Object.values(this.renderOptions_).join(`,`),r=Yi.get(n,null)?.getImage(1);if(!r){let t=this.renderOptions_,i=Math.ceil(t.size*e),a=H(i,i);this.draw_(t,a,e),r=a.canvas;let o=new Zi(r,void 0,null,B.LOADED,null);Yi.set(n,null,o),createImageBitmap(r).then(e=>{o.setImage(e)})}return r}getPixelRatio(e){return e}getImageSize(){return this.size_}getImageState(){return this.imageState_}getOrigin(){return this.origin_}getPoints(){return this.points_}getRadius(){return this.radius}setRadius(e){this.radius!==e&&(this.radius=e,this.render())}getRadius2(){return this.radius2_}setRadius2(e){this.radius2_!==e&&(this.radius2_=e,this.render())}getSize(){return this.size_}getStroke(){return this.stroke_}setStroke(e){this.stroke_=e,this.render()}listenImageChange(e){}load(){}unlistenImageChange(e){}calculateLineJoinSize_(e,t,n){if(t===0||this.points_===1/0||e!==`bevel`&&e!==`miter`)return t;let r=this.radius,i=this.radius2_===void 0?r:this.radius2_;if(rs&&(this.instructions.push([U.CUSTOM,s,l,e,n,mr,i]),this.hitDetectionInstructions.push([U.CUSTOM,s,l,e,r||n,mr,i]));break;case`Point`:c=e.getFlatCoordinates(),this.coordinates.push(c[0],c[1]),l=this.coordinates.length,this.instructions.push([U.CUSTOM,s,l,e,n,void 0,i]),this.hitDetectionInstructions.push([U.CUSTOM,s,l,e,r||n,void 0,i]);break;default:}this.endGeometry(t)}beginGeometry(e,t,n){this.beginGeometryInstruction1_=[U.BEGIN_GEOMETRY,t,0,e,n],this.instructions.push(this.beginGeometryInstruction1_),this.beginGeometryInstruction2_=[U.BEGIN_GEOMETRY,t,0,e,n],this.hitDetectionInstructions.push(this.beginGeometryInstruction2_)}finish(){return{instructions:this.instructions,hitDetectionInstructions:this.hitDetectionInstructions,coordinates:this.coordinates}}reverseHitDetectionInstructions(){let e=this.hitDetectionInstructions;e.reverse();let t,n=e.length,r,i,a=-1;for(t=0;tthis.maxLineWidth&&(this.maxLineWidth=t.lineWidth,this.bufferedMaxExtent_=null)}else t.strokeStyle=void 0,t.lineCap=void 0,t.lineDash=null,t.lineDashOffset=void 0,t.lineJoin=void 0,t.lineWidth=void 0,t.miterLimit=void 0,t.strokeOffset=void 0;return t}setFillStrokeStyle(e,t){let n=this.state;this.fillStyleToState(e,n),this.strokeStyleToState(t,n)}createFill(e){let t=e.fillStyle,n=[U.SET_FILL_STYLE,t];return typeof t!=`string`&&n.push(e.fillPatternScale),n}applyStroke(e){this.instructions.push(this.createStroke(e))}createStroke(e){return[U.SET_STROKE_STYLE,e.strokeStyle,e.lineWidth*this.pixelRatio,e.lineCap,e.lineJoin,e.miterLimit,e.lineDash?this.applyPixelRatio(e.lineDash):null,e.lineDashOffset*this.pixelRatio]}updateFillStyle(e,t){let n=e.fillStyle;(n!==void 0&&typeof n!=`string`||e.currentFillStyle!=n)&&(this.instructions.push(t.call(this,e)),e.currentFillStyle=n)}updateStrokeStyle(e,t){let n=e.strokeStyle,r=e.lineCap,i=e.lineDash,a=e.lineDashOffset,o=e.lineJoin,s=e.lineWidth,c=e.miterLimit,l=e.strokeOffset;(e.currentStrokeStyle!=n||e.currentLineCap!=r||i!=e.currentLineDash&&!g(e.currentLineDash,i)||e.currentLineDashOffset!=a||e.currentLineJoin!=o||e.currentLineWidth!=s||e.currentMiterLimit!=c||e.currentStrokeOffset!=l)&&(t.call(this,e),e.currentStrokeStyle=n,e.currentLineCap=r,e.currentLineDash=i,e.currentLineDashOffset=a,e.currentLineJoin=o,e.currentLineWidth=s,e.currentMiterLimit=c,e.currentStrokeOffset=l)}endGeometry(e){this.beginGeometryInstruction1_[2]=this.instructions.length,this.beginGeometryInstruction1_=null,this.beginGeometryInstruction2_[2]=this.hitDetectionInstructions.length,this.beginGeometryInstruction2_=null;let t=[U.END_GEOMETRY,e];this.instructions.push(t),this.hitDetectionInstructions.push(t)}getBufferedMaxExtent(){if(!this.bufferedMaxExtent_&&(this.bufferedMaxExtent_=se(this.maxExtent),this.maxLineWidth>0)){let e=this.resolution*(this.maxLineWidth+1)/2;oe(this.bufferedMaxExtent_,e,this.bufferedMaxExtent_)}return this.bufferedMaxExtent_}},ns=class extends ts{constructor(e,t,n,r){super(e,t,n,r),this.hitDetectionImage_=null,this.image_=null,this.imagePixelRatio_=void 0,this.anchorX_=void 0,this.anchorY_=void 0,this.height_=void 0,this.opacity_=void 0,this.originX_=void 0,this.originY_=void 0,this.rotateWithView_=void 0,this.rotation_=void 0,this.scale_=void 0,this.width_=void 0,this.declutterMode_=void 0,this.declutterImageWithText_=void 0}drawPoint(e,t,n){if(!this.image_||this.maxExtent&&!le(this.maxExtent,e.getFlatCoordinates()))return;this.beginGeometry(e,t,n);let r=e.getFlatCoordinates(),i=e.getStride(),a=this.coordinates.length,o=this.appendFlatPointCoordinates(r,i);this.instructions.push([U.DRAW_IMAGE,a,o,this.image_,this.anchorX_*this.imagePixelRatio_,this.anchorY_*this.imagePixelRatio_,Math.ceil(this.height_*this.imagePixelRatio_),this.opacity_,this.originX_*this.imagePixelRatio_,this.originY_*this.imagePixelRatio_,this.rotateWithView_,this.rotation_,[this.scale_[0]*this.pixelRatio/this.imagePixelRatio_,this.scale_[1]*this.pixelRatio/this.imagePixelRatio_],Math.ceil(this.width_*this.imagePixelRatio_),this.declutterMode_,this.declutterImageWithText_]),this.hitDetectionInstructions.push([U.DRAW_IMAGE,a,o,this.hitDetectionImage_,this.anchorX_,this.anchorY_,this.height_,1,this.originX_,this.originY_,this.rotateWithView_,this.rotation_,this.scale_,this.width_,this.declutterMode_,this.declutterImageWithText_]),this.endGeometry(t)}drawMultiPoint(e,t,n){if(!this.image_)return;this.beginGeometry(e,t,n);let r=e.getFlatCoordinates(),i=[];for(let t=0,n=r.length;tthis.drawCircle(e,t,n)))return;this.setFillStrokeStyles_(),this.beginGeometry(e,t,n),r.fillStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_FILL_STYLE,ma]),r.strokeStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_STROKE_STYLE,va,r.lineWidth,r.lineCap,r.lineJoin,r.miterLimit,ga,0]);let s=e.getFlatCoordinates(),c=e.getStride(),l=this.coordinates.length;this.appendFlatLineCoordinates(s,0,s.length,c,!1,!1);let u=[U.CIRCLE,l,o];this.instructions.push($o,u),this.hitDetectionInstructions.push($o,u),r.fillStyle!==void 0&&(this.instructions.push(Zo),this.hitDetectionInstructions.push(Zo)),r.strokeStyle!==void 0&&(this.instructions.push(Qo),this.hitDetectionInstructions.push(Qo)),this.endGeometry(t)}drawPolygon(e,t,n){let r=this.state,i=r.fillStyle,a=r.strokeStyle,o=r.strokeOffset;if(i===void 0&&a===void 0||this.handleStrokeOffset_(()=>this.drawPolygon(e,t,n)))return;this.setFillStrokeStyles_(),this.beginGeometry(e,t,n),r.fillStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_FILL_STYLE,ma]),r.strokeStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_STROKE_STYLE,va,r.lineWidth,r.lineCap,r.lineJoin,r.miterLimit,ga,0]);let s=e.getEnds(),c=e.getOrientedFlatCoordinates(),l=e.getStride();this.drawFlatCoordinatess_(c,0,s,l,o),this.endGeometry(t)}drawMultiPolygon(e,t,n){let r=this.state,i=r.fillStyle,a=r.strokeStyle,o=r.strokeOffset;if(i===void 0&&a===void 0||this.handleStrokeOffset_(()=>this.drawMultiPolygon(e,t,n)))return;this.setFillStrokeStyles_(),this.beginGeometry(e,t,n),r.fillStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_FILL_STYLE,ma]),r.strokeStyle!==void 0&&this.hitDetectionInstructions.push([U.SET_STROKE_STYLE,va,r.lineWidth,r.lineCap,r.lineJoin,r.miterLimit,ga,0]);let s=e.getEndss(),c=e.getOrientedFlatCoordinates(),l=e.getStride(),u=0;for(let e=0,t=s.length;e0&&n!==void 0&&r!==void 0?(t.strokeStyle=void 0,t.strokeOffset=0,e(),t.fillStyle=void 0,t.strokeStyle=r,t.strokeOffset=i,e(),t.fillStyle=n,!0):!1}};function as(e,t,n,r,i){let a=[],o=n,s=0,c=t.slice(n,2);for(;s=e){let t=(e-s+d)/d,f=Ge(n,l,t),p=Ge(r,u,t);c.push(f,p),a.push(c),c=[f,p],s==e&&(o+=i),s=0}else if(s0&&a.push(c),a}function os(e,t,n,r,i){let a=n,o=n,s=0,c=0,l=n,u,d,f,p,m,h,g,_,v,y;for(d=n;de&&(c>s&&(s=c,a=l,o=d),c=0,l=d-i)),f=p,g=v,_=y),m=n,h=r}return c+=p,c>s?[l,d]:[a,o]}var ss={left:0,center:.5,right:1,top:0,middle:.5,hanging:.2,alphabetic:.8,ideographic:.8,bottom:1},cs={Circle:is,Default:ts,Image:ns,LineString:rs,Polygon:is,Text:class extends ts{constructor(e,t,n,r){super(e,t,n,r),this.labels_=null,this.text_=``,this.textOffsetX_=0,this.textOffsetY_=0,this.textRotateWithView_=void 0,this.textKeepUpright_=void 0,this.textRotation_=0,this.textFillState_=null,this.fillStates={},this.fillStates[ma]={fillStyle:ma},this.textStrokeState_=null,this.strokeStates={},this.textState_={},this.textStates={},this.textKey_=``,this.fillKey_=``,this.strokeKey_=``,this.declutterMode_=void 0,this.declutterImageWithText_=void 0}finish(){let e=super.finish();return e.textStates=this.textStates,e.fillStates=this.fillStates,e.strokeStates=this.strokeStates,e}drawText(e,t,n){let r=this.textFillState_,i=this.textStrokeState_,a=this.textState_;if(this.text_===``||!a||!r&&!i)return;let o=this.coordinates,s=o.length,c=e.getType(),l=null,u=e.getStride();if(a.placement===`line`&&(c==`LineString`||c==`MultiLineString`||c==`Polygon`||c==`MultiPolygon`)){if(!Ne(this.maxExtent,e.getExtent()))return;let r;if(l=e.getFlatCoordinates(),c==`LineString`)r=[l.length];else if(c==`MultiLineString`)r=e.getEnds();else if(c==`Polygon`)r=e.getEnds().slice(0,1);else if(c==`MultiPolygon`){let t=e.getEndss();r=[];for(let e=0,n=t.length;e{let r=o[(e+n)*2]===l[n*u]&&o[(e+n)*2+1]===l[n*u+1];return r||--e,r})}this.saveTextStates_();let d=a.backgroundFill?this.createFill(this.fillStyleToState(a.backgroundFill)):null,f=a.backgroundStroke?this.createStroke(this.strokeStyleToState(a.backgroundStroke)):null;this.beginGeometry(e,t,n);let p=a.padding;if(p!=xa&&(a.scale[0]<0||a.scale[1]<0)){let e=a.padding[0],t=a.padding[1],n=a.padding[2],r=a.padding[3];a.scale[0]<0&&(t=-t,r=-r),a.scale[1]<0&&(e=-e,n=-n),p=[e,t,n,r]}let m=this.pixelRatio;this.instructions.push([U.DRAW_IMAGE,s,i,null,NaN,NaN,NaN,1,0,0,this.textRotateWithView_,this.textRotation_,[1,1],NaN,this.declutterMode_,this.declutterImageWithText_,p==xa?xa:p.map(function(e){return e*m}),d,f,this.text_,this.textKey_,this.strokeKey_,this.fillKey_,this.textOffsetX_,this.textOffsetY_,r]);let h=1/m,g=d?d.slice(0):null;g&&(g[1]=ma),this.hitDetectionInstructions.push([U.DRAW_IMAGE,s,i,null,NaN,NaN,NaN,1,0,0,this.textRotateWithView_,this.textRotation_,[h,h],NaN,this.declutterMode_,this.declutterImageWithText_,p,g,f,this.text_,this.textKey_,this.strokeKey_,this.fillKey_?ma:this.fillKey_,this.textOffsetX_,this.textOffsetY_,r]),this.endGeometry(t)}}saveTextStates_(){let e=this.textStrokeState_,t=this.textState_,n=this.textFillState_,r=this.strokeKey_;e&&(r in this.strokeStates||(this.strokeStates[r]={strokeStyle:e.strokeStyle,lineCap:e.lineCap,lineDashOffset:e.lineDashOffset,lineWidth:e.lineWidth,lineJoin:e.lineJoin,miterLimit:e.miterLimit,lineDash:e.lineDash}));let i=this.textKey_;i in this.textStates||(this.textStates[i]={font:t.font,textAlign:t.textAlign||`center`,justify:t.justify,textBaseline:t.textBaseline||`middle`,scale:t.scale});let a=this.fillKey_;n&&(a in this.fillStates||(this.fillStates[a]={fillStyle:n.fillStyle}))}drawChars_(e,t){let n=this.textStrokeState_,r=this.textState_,i=this.strokeKey_,a=this.textKey_,o=this.fillKey_;this.saveTextStates_();let s=this.pixelRatio,c=ss[r.textBaseline],l=this.textOffsetY_*s,u=this.text_,d=n?n.lineWidth*Math.abs(r.scale[0])/2:0;this.instructions.push([U.DRAW_CHARS,e,t,c,r.overflow,o,r.maxAngle,s,l,i,d*s,u,a,1,this.declutterMode_,this.textKeepUpright_]),this.hitDetectionInstructions.push([U.DRAW_CHARS,e,t,c,r.overflow,o&&ma,r.maxAngle,s,l,i,d*s,u,a,1/s,this.declutterMode_,this.textKeepUpright_])}setTextStyle(e,t){let n,r,i;if(!e)this.text_=``;else{let t=e.getFill();t?(r=this.textFillState_,r||(r={},this.textFillState_=r),r.fillStyle=$i(t.getColor()||`#000`)):(r=null,this.textFillState_=r);let a=e.getStroke();if(!a)i=null,this.textStrokeState_=i;else{i=this.textStrokeState_,i||(i={},this.textStrokeState_=i);let e=a.getLineDash(),t=a.getLineDashOffset(),n=a.getWidth(),r=a.getMiterLimit();i.lineCap=a.getLineCap()||`round`,i.lineDash=e?e.slice():ga,i.lineDashOffset=t===void 0?0:t,i.lineJoin=a.getLineJoin()||`round`,i.lineWidth=n===void 0?1:n,i.miterLimit=r===void 0?10:r,i.strokeStyle=$i(a.getColor()||`#000`)}n=this.textState_;let o=e.getFont()||`10px sans-serif`;Oa(o);let s=e.getScaleArray();n.overflow=e.getOverflow(),n.font=o,n.maxAngle=e.getMaxAngle(),n.placement=e.getPlacement(),n.textAlign=e.getTextAlign(),n.repeat=e.getRepeat(),n.justify=e.getJustify(),n.textBaseline=e.getTextBaseline()||`middle`,n.backgroundFill=e.getBackgroundFill(),n.backgroundStroke=e.getBackgroundStroke(),n.padding=e.getPadding()||xa,n.scale=s===void 0?[1,1]:s;let c=e.getOffsetX(),l=e.getOffsetY(),u=e.getRotateWithView(),d=e.getKeepUpright(),f=e.getRotation();this.text_=e.getText()||``,this.textOffsetX_=c===void 0?0:c,this.textOffsetY_=l===void 0?0:l,this.textRotateWithView_=u===void 0?!1:u,this.textKeepUpright_=d===void 0?!0:d,this.textRotation_=f===void 0?0:f,this.strokeKey_=i?(typeof i.strokeStyle==`string`?i.strokeStyle:k(i.strokeStyle))+i.lineCap+i.lineDashOffset+`|`+i.lineWidth+i.lineJoin+i.miterLimit+`[`+i.lineDash.join()+`]`:``,this.textKey_=n.font+n.scale+(n.textAlign||`?`)+(n.repeat||`?`)+(n.justify||`?`)+(n.textBaseline||`?`),this.fillKey_=r&&r.fillStyle?typeof r.fillStyle==`string`?r.fillStyle:`|`+k(r.fillStyle):``}this.declutterMode_=e.getDeclutterMode(),this.declutterImageWithText_=t}}},ls=class{constructor(e,t,n,r){this.tolerance_=e,this.maxExtent_=t,this.pixelRatio_=r,this.resolution_=n,this.buildersByZIndex_={}}finish(){let e={};for(let t in this.buildersByZIndex_){e[t]=e[t]||{};let n=this.buildersByZIndex_[t];for(let r in n){let i=n[r].finish();e[t][r]=i}}return e}getBuilder(e,t){let n=e===void 0?`0`:e.toString(),r=this.buildersByZIndex_[n];r===void 0&&(r={},this.buildersByZIndex_[n]=r);let i=r[t];if(i===void 0){let e=cs[t];i=new e(this.tolerance_,this.maxExtent_,this.resolution_,this.pixelRatio_),r[t]=i}return i}};function 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ks=class{constructor(e,t,n,r,i,a,o){this.maxExtent_=e,this.overlaps_=r,this.pixelRatio_=n,this.resolution_=t,this.renderBuffer_=a,this.executorsByZIndex_={},this.hitDetectionContext_=null,this.hitDetectionTransform_=Pn(),this.renderedContext_=null,this.deferredZIndexContexts_={},this.createExecutors_(i,o)}clip(e,t){let n=this.getClipCoords(t);e.beginPath(),e.moveTo(n[0],n[1]),e.lineTo(n[2],n[3]),e.lineTo(n[4],n[5]),e.lineTo(n[6],n[7]),e.clip()}createExecutors_(e,t){for(let n in e){let r=this.executorsByZIndex_[n];r===void 0&&(r={},this.executorsByZIndex_[n]=r);let i=e[n];for(let e in i){let n=i[e];r[e]=new Ss(this.resolution_,this.pixelRatio_,this.overlaps_,n,t)}}}hasExecutors(e){for(let t in this.executorsByZIndex_){let n=this.executorsByZIndex_[t];for(let t=0,r=e.length;t0){if(!a||n===`none`||p!==`Image`&&p!==`Text`||a.includes(e)){let n=(f[c]-3)/4,a=r-n%o,s=r-(n/o|0),l=i(e,t,a*a+s*s);if(l)return l}l.clearRect(0,0,o,o);break}}let 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this.dragging_||Math.abs(e.clientX-this.down_.clientX)>this.moveTolerance_||Math.abs(e.clientY-this.down_.clientY)>this.moveTolerance_}disposeInternal(){this.relayedListenerKey_&&=(s(this.relayedListenerKey_),null),this.element_.removeEventListener(c.TOUCHMOVE,this.boundHandleTouchMove_),this.pointerdownListenerKey_&&=(s(this.pointerdownListenerKey_),null),this.dragListenerKeys_.forEach(s),this.dragListenerKeys_.length=0,this.element_=null,super.disposeInternal()}},Yl={POSTRENDER:`postrender`,MOVESTART:`movestart`,MOVEEND:`moveend`,LOADSTART:`loadstart`,LOADEND:`loadend`},Xl={LAYERGROUP:`layergroup`,SIZE:`size`,TARGET:`target`,VIEW:`view`},Zl=1/0,Ql=class{constructor(e,t){this.priorityFunction_=e,this.keyFunction_=t,this.elements_=[],this.priorities_=[],this.queuedElements_={}}clear(){this.elements_.length=0,this.priorities_.length=0,r(this.queuedElements_)}dequeue(){let e=this.elements_,t=this.priorities_,n=e[0];e.length==1?(e.length=0,t.length=0):(e[0]=e.pop(),t[0]=t.pop(),this.siftUp_(0));let r=this.keyFunction_(n);return delete this.queuedElements_[r],n}enqueue(e){M(!(this.keyFunction_(e)in this.queuedElements_),"Tried to enqueue an `element` that was already added to the queue");let t=this.priorityFunction_(e);return t==1/0?!1:(this.elements_.push(e),this.priorities_.push(t),this.queuedElements_[this.keyFunction_(e)]=!0,this.siftDown_(0,this.elements_.length-1),!0)}getCount(){return this.elements_.length}getLeftChildIndex_(e){return e*2+1}getRightChildIndex_(e){return e*2+2}getParentIndex_(e){return e-1>>1}heapify_(){let e;for(e=(this.elements_.length>>1)-1;e>=0;e--)this.siftUp_(e)}isEmpty(){return this.elements_.length===0}isKeyQueued(e){return e in this.queuedElements_}isQueued(e){return this.isKeyQueued(this.keyFunction_(e))}siftUp_(e){let t=this.elements_,n=this.priorities_,r=t.length,i=t[e],a=n[e],o=e;for(;e>1;){let i=this.getLeftChildIndex_(e),a=this.getRightChildIndex_(e),o=ae;){let e=this.getParentIndex_(t);if(r[e]>a)n[t]=n[e],r[t]=r[e],t=e;else break}n[t]=i,r[t]=a}reprioritize(){let e=this.priorityFunction_,t=this.elements_,n=this.priorities_,r=0,i=t.length,a,o,s;for(o=0;oe.apply(null,t),e=>e[0].getKey()),this.boundHandleTileChange_=this.handleTileChange.bind(this),this.tileChangeCallback_=t,this.tilesLoading_=0,this.tilesLoadingKeys_={}}enqueue(e){let t=super.enqueue(e);return t&&e[0].addEventListener(c.CHANGE,this.boundHandleTileChange_),t}getTilesLoading(){return this.tilesLoading_}handleTileChange(e){let t=e.target,n=t.getState();if(n===V.LOADED||n===V.ERROR||n===V.EMPTY){n!==V.ERROR&&t.removeEventListener(c.CHANGE,this.boundHandleTileChange_);let e=t.getKey();e in this.tilesLoadingKeys_&&(delete this.tilesLoadingKeys_[e],--this.tilesLoading_),this.tileChangeCallback_()}}loadMoreTiles(e,t){let n=0;for(;this.tilesLoading_0;){let e=this.dequeue()[0],t=e.getKey();e.getState()===V.IDLE&&!(t in this.tilesLoadingKeys_)&&(this.tilesLoadingKeys_[t]=!0,++this.tilesLoading_,++n,e.load())}}};function eu(e,t,n,r,i){if(!e||!(n in e.wantedTiles)||!e.wantedTiles[n][t.getKey()])return Zl;let a=e.viewState.center,o=r[0]-a[0],s=r[1]-a[1];return 65536*Math.log(i)+Math.sqrt(o*o+s*s)/i}var tu=class extends j{constructor(e){super();let t=e.element;t&&!e.target&&!t.style.pointerEvents&&(t.style.pointerEvents=`auto`),this.element=t||null,this.target_=null,this.map_=null,this.listenerKeys=[],e.render&&(this.render=e.render),e.target&&this.setTarget(e.target)}disposeInternal(){this.element?.remove(),super.disposeInternal()}getMap(){return this.map_}setMap(e){this.map_&&this.element?.remove();for(let e=0,t=this.listenerKeys.length;et.getAttributions(e)));if(this.attributions_!==void 0&&(Array.isArray(this.attributions_)?this.attributions_.forEach(e=>n.add(e)):n.add(this.attributions_)),!this.overrideCollapsible_){let e=!t.some(e=>e.getSource()?.getAttributionsCollapsible()===!1);this.setCollapsible(e)}return Array.from(n)}async updateElement_(e){if(!e){this.renderedVisible_&&=(this.element.style.display=`none`,!1);return}let t=await Promise.all(this.collectSourceAttributions_(e).map(e=>S(()=>e))),n=t.length>0;if(this.renderedVisible_!=n&&(this.element.style.display=n?``:`none`,this.renderedVisible_=n),!g(t,this.renderedAttributions_)){di(this.ulElement_);for(let e=0,n=t.length;e0&&t%(2*Math.PI)!=0?e.animate({rotation:0,duration:this.duration_,easing:ri}):e.setRotation(0))}render(e){let t=e.frameState;if(!t)return;let n=t.viewState.rotation;if(n!=this.rotation_){let e=`rotate(`+n+`rad)`;if(this.autoHide_){let e=this.element.classList.contains(aa);!e&&n===0?this.element.classList.add(aa):e&&n!==0&&this.element.classList.remove(aa)}this.label_.style.transform=e}this.rotation_=n}},iu=class extends tu{constructor(e){e||={},super({element:document.createElement(`div`),target:e.target});let t=e.className===void 0?`ol-zoom`:e.className,n=e.delta===void 0?1:e.delta,r=e.zoomInClassName===void 0?t+`-in`:e.zoomInClassName,i=e.zoomOutClassName===void 0?t+`-out`:e.zoomOutClassName,a=e.zoomInLabel===void 0?`+`:e.zoomInLabel,o=e.zoomOutLabel===void 0?`–`:e.zoomOutLabel,s=e.zoomInTipLabel===void 0?`Zoom in`:e.zoomInTipLabel,l=e.zoomOutTipLabel===void 0?`Zoom out`:e.zoomOutTipLabel,u=document.createElement(`button`);u.className=r,u.setAttribute(`type`,`button`),u.title=s,u.appendChild(typeof a==`string`?document.createTextNode(a):a),u.addEventListener(c.CLICK,this.handleClick_.bind(this,n),!1);let d=document.createElement(`button`);d.className=i,d.setAttribute(`type`,`button`),d.title=l,d.appendChild(typeof o==`string`?document.createTextNode(o):o),d.addEventListener(c.CLICK,this.handleClick_.bind(this,-n),!1);let f=t+` `+oa+` `+sa,p=this.element;p.className=f,p.appendChild(u),p.appendChild(d),this.duration_=e.duration===void 0?250:e.duration}handleClick_(e,t){t.preventDefault(),this.zoomByDelta_(e)}zoomByDelta_(e){let t=this.getMap().getView();if(!t)return;let n=t.getZoom();if(n!==void 0){let r=t.getConstrainedZoom(n+e);this.duration_>0?(t.getAnimating()&&t.cancelAnimations(),t.animate({zoom:r,duration:this.duration_,easing:ri})):t.setZoom(r)}}};function au(e){e||={};let t=new ne;return(e.zoom===void 0||e.zoom)&&t.push(new iu(e.zoomOptions)),(e.rotate===void 0||e.rotate)&&t.push(new ru(e.rotateOptions)),(e.attribution===void 0||e.attribution)&&t.push(new nu(e.attributionOptions)),t}var ou={ACTIVE:`active`},su=class extends j{constructor(e){super(),this.on,this.once,this.un,e&&e.handleEvent&&(this.handleEvent=e.handleEvent),this.map_=null,this.setActive(!0)}getActive(){return this.get(ou.ACTIVE)}getMap(){return this.map_}handleEvent(e){return!0}setActive(e){this.set(ou.ACTIVE,e)}setMap(e){this.map_=e}};function cu(e,t,n){let r=e.getCenterInternal();if(r){let i=[r[0]+t[0],r[1]+t[1]];e.animateInternal({duration:n===void 0?250:n,easing:ai,center:e.getConstrainedCenter(i)})}}function lu(e,t,n,r){let i=e.getZoom();if(i===void 0)return;let a=e.getConstrainedZoom(i+t),o=e.getResolutionForZoom(a);e.getAnimating()&&e.cancelAnimations(),e.animate({resolution:o,anchor:n,duration:r===void 0?250:r,easing:ri})}var uu=class extends su{constructor(e){super(),e||={},this.delta_=e.delta?e.delta:1,this.duration_=e.duration===void 0?250:e.duration}handleEvent(e){let t=!1;if(e.type==$.DBLCLICK){let n=e.originalEvent,r=e.map,i=e.coordinate,a=n.shiftKey?-this.delta_:this.delta_;lu(r.getView(),a,i,this.duration_),n.preventDefault(),t=!0}return!t}};function du(e){let t=arguments;return function(e){let n=!0;for(let r=0,i=t.length;r0}}else if(e.type==$.POINTERDOWN){let n=this.handleDownEvent(e);this.handlingDownUpSequence=n,t=this.stopDown(n)}else e.type==$.POINTERMOVE&&this.handleMoveEvent(e);return!t}handleMoveEvent(e){}handleUpEvent(e){return!1}stopDown(e){return e}updateTrackedPointers_(e){e.activePointers&&(this.targetPointers=e.activePointers)}};function wu(e){let t=e.length,n=0,r=0;for(let i=0;i0&&this.condition_(e)){let t=e.map.getView();return this.lastCentroid=null,t.getAnimating()&&t.cancelAnimations(),this.kinetic_&&this.kinetic_.begin(),this.noKinetic_=this.targetPointers.length>1,!0}return!1}},Eu=class extends Cu{constructor(e){e||={},super({stopDown:y}),this.condition_=e.condition?e.condition:fu,this.lastAngle_=void 0,this.duration_=e.duration===void 0?250:e.duration}handleDragEvent(e){if(!xu(e))return;let t=e.map,n=t.getView();if(n.getConstraints().rotation===El)return;let r=t.getSize(),i=e.pixel,a=Math.atan2(r[1]/2-i[1],i[0]-r[0]/2);if(this.lastAngle_!==void 0){let e=a-this.lastAngle_;n.adjustRotationInternal(-e)}this.lastAngle_=a}handleUpEvent(e){return xu(e)?(e.map.getView().endInteraction(this.duration_),!1):!0}handleDownEvent(e){return xu(e)&&gu(e)&&this.condition_(e)?(e.map.getView().beginInteraction(),this.lastAngle_=void 0,!0):!1}},Du=class extends l{constructor(e){super(),this.geometry_=null,this.element_=document.createElement(`div`),this.element_.style.position=`absolute`,this.element_.style.pointerEvents=`auto`,this.element_.className=`ol-box `+e,this.map_=null,this.startPixel_=null,this.endPixel_=null}disposeInternal(){this.setMap(null)}render_(){let e=this.startPixel_,t=this.endPixel_,n=this.element_.style;n.left=Math.min(e[0],t[0])+`px`,n.top=Math.min(e[1],t[1])+`px`,n.width=Math.abs(t[0]-e[0])+`px`,n.height=Math.abs(t[1]-e[1])+`px`}setMap(e){if(this.map_){this.map_.getOverlayContainer().removeChild(this.element_);let e=this.element_.style;e.left=`inherit`,e.top=`inherit`,e.width=`inherit`,e.height=`inherit`}this.map_=e,this.map_&&this.map_.getOverlayContainer().appendChild(this.element_)}setPixels(e,t){this.startPixel_=e,this.endPixel_=t,this.createOrUpdateGeometry(),this.render_()}createOrUpdateGeometry(){if(!this.map_)return;let e=this.startPixel_,t=this.endPixel_,n=[e,[e[0],t[1]],t,[t[0],e[1]]].map(this.map_.getCoordinateFromPixelInternal,this.map_);n[4]=n[0].slice(),this.geometry_?this.geometry_.setCoordinates([n]):this.geometry_=new Wr([n])}getGeometry(){return this.geometry_}},Ou={BOXSTART:`boxstart`,BOXDRAG:`boxdrag`,BOXEND:`boxend`,BOXCANCEL:`boxcancel`},ku=class extends C{constructor(e,t,n){super(e),this.coordinate=t,this.mapBrowserEvent=n}},Au=class extends Cu{constructor(e){super(),this.on,this.once,this.un,e??={},this.box_=new Du(e.className||`ol-dragbox`),this.minArea_=e.minArea??64,e.onBoxEnd&&(this.onBoxEnd=e.onBoxEnd),this.startPixel_=null,this.condition_=e.condition??gu,this.boxEndCondition_=e.boxEndCondition??this.defaultBoxEndCondition}defaultBoxEndCondition(e,t,n){let r=n[0]-t[0],i=n[1]-t[1];return r*r+i*i>=this.minArea_}getGeometry(){return this.box_.getGeometry()}handleDragEvent(e){this.startPixel_&&(this.box_.setPixels(this.startPixel_,e.pixel),this.dispatchEvent(new ku(Ou.BOXDRAG,e.coordinate,e)))}handleUpEvent(e){if(!this.startPixel_)return!1;let t=this.boxEndCondition_(e,this.startPixel_,e.pixel);return t&&this.onBoxEnd(e),this.dispatchEvent(new ku(t?Ou.BOXEND:Ou.BOXCANCEL,e.coordinate,e)),this.box_.setMap(null),this.startPixel_=null,!1}handleDownEvent(e){return this.condition_(e)?(this.startPixel_=e.pixel,this.box_.setMap(e.map),this.box_.setPixels(this.startPixel_,this.startPixel_),this.dispatchEvent(new ku(Ou.BOXSTART,e.coordinate,e)),!0):!1}onBoxEnd(e){}setActive(e){e||(this.box_.setMap(null),this.startPixel_&&=(this.dispatchEvent(new ku(Ou.BOXCANCEL,this.startPixel_,null)),null)),super.setActive(e)}setMap(e){this.getMap()&&(this.box_.setMap(null),this.startPixel_&&=(this.dispatchEvent(new ku(Ou.BOXCANCEL,this.startPixel_,null)),null)),super.setMap(e)}},ju=class extends Au{constructor(e){e||={};let t=e.condition?e.condition:yu;super({condition:t,className:e.className||`ol-dragzoom`,minArea:e.minArea}),this.duration_=e.duration===void 0?200:e.duration,this.out_=e.out===void 0?!1:e.out}onBoxEnd(e){let t=this.getMap().getView(),n=this.getGeometry();if(this.out_){let e=t.rotatedExtentForGeometry(n),r=t.getResolutionForExtentInternal(e),i=t.getResolution()/r;n=n.clone(),n.scale(i*i)}t.fitInternal(n,{duration:this.duration_,easing:ri})}},Mu={LEFT:`ArrowLeft`,UP:`ArrowUp`,RIGHT:`ArrowRight`,DOWN:`ArrowDown`},Nu=class extends su{constructor(e){super(),e||={},this.defaultCondition_=function(e){return _u(e)&&bu(e)},this.condition_=e.condition===void 0?this.defaultCondition_:e.condition,this.duration_=e.duration===void 0?100:e.duration,this.pixelDelta_=e.pixelDelta===void 0?128:e.pixelDelta}handleEvent(e){let t=!1;if(e.type==c.KEYDOWN){let n=e.originalEvent,r=n.key;if(this.condition_(e)&&(r==Mu.DOWN||r==Mu.LEFT||r==Mu.RIGHT||r==Mu.UP)){let i=e.map.getView(),a=i.getResolution()*this.pixelDelta_,o=0,s=0;r==Mu.DOWN?s=-a:r==Mu.LEFT?o=-a:r==Mu.RIGHT?o=a:s=a;let c=[o,s];nt(c,i.getRotation()),cu(i,c,this.duration_),n.preventDefault(),t=!0}}return!t}},Pu=class extends su{constructor(e){super(),e||={},this.condition_=e.condition?e.condition:function(e){return!vu(e)&&bu(e)},this.delta_=e.delta?e.delta:1,this.duration_=e.duration===void 0?100:e.duration}handleEvent(e){let t=!1;if(e.type==c.KEYDOWN||e.type==c.KEYPRESS){let n=e.originalEvent,r=n.key;if(this.condition_(e)&&(r===`+`||r===`-`)){let i=e.map,a=r===`+`?this.delta_:-this.delta_;lu(i.getView(),a,void 0,this.duration_),n.preventDefault(),t=!0}}return!t}},Fu=40,Iu=300,Lu=3,Ru=class extends su{constructor(e){e||={},super(e),this.totalDelta_=0,this.lastDelta_=0,this.maxDelta_=e.maxDelta===void 0?1:e.maxDelta,this.duration_=e.duration===void 0?250:e.duration,this.timeout_=e.timeout===void 0?80:e.timeout,this.useAnchor_=e.useAnchor===void 0?!0:e.useAnchor,this.constrainResolution_=e.constrainResolution===void 0?!1:e.constrainResolution;let t=e.condition?e.condition:hu;this.condition_=e.onFocusOnly?du(mu,t):t,this.lastAnchor_=null,this.startTime_=void 0,this.timeoutId_,this.mode_=void 0,this.trackpadEventGap_=400,this.trackpadTimeoutId_,this.deltaPerZoom_=300,this.ctrlKeyPressed_=!1,this.ctrlKeyListenerKeys_=[]}setMap(e){if(this.ctrlKeyListenerKeys_.forEach(s),this.ctrlKeyListenerKeys_.length=0,this.ctrlKeyPressed_=!1,super.setMap(e),e){let t=e.getOwnerDocument();this.ctrlKeyListenerKeys_.push(a(t,`keydown`,e=>{e.key===`Control`&&(this.ctrlKeyPressed_=!0)}),a(t,`keyup`,e=>{e.key===`Control`&&(this.ctrlKeyPressed_=!1)}))}}endInteraction_(){this.trackpadTimeoutId_=void 0;let e=this.getMap();if(!e)return;let t=e.getView(),n=this.lastDelta_?this.lastDelta_>0?1:-1:0;t.endInteraction(this.constrainResolution_||t.getConstrainResolution()?100:void 0,n,this.lastAnchor_?e.getCoordinateFromPixel(this.lastAnchor_):null)}handleEvent(e){if(!this.condition_(e)||e.type!==c.WHEEL)return!0;let t=e.map,n=e.originalEvent;n.preventDefault();let r=n.ctrlKey&&!this.ctrlKeyPressed_;n.ctrlKey||(this.ctrlKeyPressed_=!1),this.useAnchor_&&(this.lastAnchor_=e.pixel);let i=n.deltaY;switch(n.deltaMode){case WheelEvent.DOM_DELTA_LINE:i*=Fu;break;case WheelEvent.DOM_DELTA_PAGE:i*=Iu;break;default:}if(i===0)return!1;this.lastDelta_=i;let a=Date.now();this.startTime_===void 0&&(this.startTime_=a),(!this.mode_||a-this.startTime_>this.trackpadEventGap_)&&(this.mode_=Math.abs(i)<4?`trackpad`:`wheel`);let o=t.getView();if(this.mode_===`trackpad`)return this.trackpadTimeoutId_?clearTimeout(this.trackpadTimeoutId_):(o.getAnimating()&&o.cancelAnimations(),o.beginInteraction()),this.trackpadTimeoutId_=setTimeout(this.endInteraction_.bind(this),this.timeout_),r&&(i*=Lu),o.adjustZoom(-i/this.deltaPerZoom_,this.lastAnchor_?t.getCoordinateFromPixel(this.lastAnchor_):null),this.startTime_=a,!1;this.totalDelta_+=i;let s=Math.max(this.timeout_-(a-this.startTime_),0);return clearTimeout(this.timeoutId_),this.timeoutId_=setTimeout(this.handleWheelZoom_.bind(this,t),s),!1}handleWheelZoom_(e){let t=e.getView();t.getAnimating()&&t.cancelAnimations();let n=-L(this.totalDelta_,-this.maxDelta_*this.deltaPerZoom_,this.maxDelta_*this.deltaPerZoom_)/this.deltaPerZoom_;(t.getConstrainResolution()||this.constrainResolution_)&&(n=n?n>0?1:-1:0),lu(t,n,this.lastAnchor_?e.getCoordinateFromPixel(this.lastAnchor_):null,this.duration_),this.mode_=void 0,this.totalDelta_=0,this.lastAnchor_=null,this.startTime_=void 0,this.timeoutId_=void 0}setMouseAnchor(e){this.useAnchor_=e,e||(this.lastAnchor_=null)}},zu=class extends Cu{constructor(e){e||={};let t=e;t.stopDown||=y,super(t),this.anchor_=null,this.lastAngle_=void 0,this.rotating_=!1,this.rotationDelta_=0,this.threshold_=e.threshold===void 0?.3:e.threshold,this.duration_=e.duration===void 0?250:e.duration}handleDragEvent(e){let t=0,n=this.targetPointers[0],r=this.targetPointers[1],i=Math.atan2(r.clientY-n.clientY,r.clientX-n.clientX);if(this.lastAngle_!==void 0){let e=i-this.lastAngle_;this.rotationDelta_+=e,!this.rotating_&&Math.abs(this.rotationDelta_)>this.threshold_&&(this.rotating_=!0),t=e}this.lastAngle_=i;let a=e.map,o=a.getView();o.getConstraints().rotation!==El&&(this.anchor_=a.getCoordinateFromPixelInternal(a.getEventPixel(wu(this.targetPointers))),this.rotating_&&(a.render(),o.adjustRotationInternal(t,this.anchor_)))}handleUpEvent(e){return this.targetPointers.length<2?(e.map.getView().endInteraction(this.duration_),!1):!0}handleDownEvent(e){if(this.targetPointers.length>=2){let t=e.map;return this.anchor_=null,this.lastAngle_=void 0,this.rotating_=!1,this.rotationDelta_=0,this.handlingDownUpSequence||t.getView().beginInteraction(),!0}return!1}},Bu=class extends Cu{constructor(e){e||={};let t=e;t.stopDown||=y,super(t),this.anchor_=null,this.duration_=e.duration===void 0?400:e.duration,this.lastDistance_=void 0,this.lastScaleDelta_=1}handleDragEvent(e){let t=1,n=this.targetPointers[0],r=this.targetPointers[1],i=n.clientX-r.clientX,a=n.clientY-r.clientY,o=Math.sqrt(i*i+a*a);this.lastDistance_!==void 0&&(t=this.lastDistance_/o),this.lastDistance_=o;let s=e.map,c=s.getView();t!=1&&(this.lastScaleDelta_=t),this.anchor_=s.getCoordinateFromPixelInternal(s.getEventPixel(wu(this.targetPointers))),s.render(),c.adjustResolutionInternal(t,this.anchor_)}handleUpEvent(e){if(this.targetPointers.length<2){let t=e.map.getView(),n=this.lastScaleDelta_>1?1:-1;return t.endInteraction(this.duration_,n),!1}return!0}handleDownEvent(e){if(this.targetPointers.length>=2){let t=e.map;return this.anchor_=null,this.lastDistance_=void 0,this.lastScaleDelta_=1,this.handlingDownUpSequence||t.getView().beginInteraction(),!0}return!1}};function Vu(e){e||={};let t=new ne,n=new _i(-.005,.05,100);return(e.altShiftDragRotate===void 0||e.altShiftDragRotate)&&t.push(new Eu),(e.doubleClickZoom===void 0||e.doubleClickZoom)&&t.push(new uu({delta:e.zoomDelta,duration:e.zoomDuration})),(e.dragPan===void 0||e.dragPan)&&t.push(new Tu({onFocusOnly:e.onFocusOnly,kinetic:n})),(e.pinchRotate===void 0||e.pinchRotate)&&t.push(new zu),(e.pinchZoom===void 0||e.pinchZoom)&&t.push(new Bu({duration:e.zoomDuration})),(e.keyboard===void 0||e.keyboard)&&(t.push(new Nu),t.push(new Pu({delta:e.zoomDelta,duration:e.zoomDuration}))),(e.mouseWheelZoom===void 0||e.mouseWheelZoom)&&t.push(new Ru({onFocusOnly:e.onFocusOnly,duration:e.zoomDuration})),(e.shiftDragZoom===void 0||e.shiftDragZoom)&&t.push(new ju({duration:e.zoomDuration})),t}var Hu={ADDLAYER:`addlayer`,REMOVELAYER:`removelayer`},Uu=class extends C{constructor(e,t){super(e),this.layer=t}},Wu={LAYERS:`layers`},Gu=class e extends Rl{constructor(e){e||={};let t=Object.assign({},e);delete t.layers;let n=e.layers;super(t),this.on,this.once,this.un,this.layersListenerKeys_=[],this.listenerKeys_={},this.addChangeListener(Wu.LAYERS,this.handleLayersChanged_),n?Array.isArray(n)?n=new ne(n.slice(),{unique:!0}):M(typeof n.getArray==`function`,"Expected `layers` to be an array or a `Collection`"):n=new ne(void 0,{unique:!0}),this.setLayers(n)}handleLayerChange_(){this.changed()}handleLayersChanged_(){this.layersListenerKeys_.forEach(s),this.layersListenerKeys_.length=0;let e=this.getLayers();this.layersListenerKeys_.push(a(e,t.ADD,this.handleLayersAdd_,this),a(e,t.REMOVE,this.handleLayersRemove_,this));for(let e in this.listenerKeys_)this.listenerKeys_[e].forEach(s);r(this.listenerKeys_);let n=e.getArray();for(let e=0,t=n.length;e=0;--i){let a=m[i],d=a.layer;if(d.hasRenderer()&&Bl(a,l)&&o.call(s,d)){let i=d.getRenderer(),o=d.getSource();if(i&&o){let s=o.getWrapX()?f:e,l=u.bind(null,a.managed);_[0]=s[0]+p[r][0],_[1]=s[1]+p[r][1],c=i.forEachFeatureAtCoordinate(_,t,n,l,g)}if(c)return 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r=t[n];if(!(r.getMap()!==this||!r.getActive()||!this.getTargetElement())&&(!r.handleEvent(e)||e.propagationStopped))break}}}handlePostRender(){let e=this.frameState_,t=this.tileQueue_;if(!t.isEmpty()){let n=this.maxTilesLoading_,r=n,i=e?e.viewHints:void 0,a=i?i[Xo.ANIMATING]||i[Xo.INTERACTING]:!1;if(a){let t=Date.now()-e.time>8;n=t?0:8,r=t?0:2}t.getTilesLoading(){this.postRenderTimeoutHandle_=void 0,this.handlePostRender()},0)}setLayerGroup(e){let t=this.getLayerGroup();t&&this.handleLayerRemove_(new Uu(`removelayer`,t)),this.set(Xl.LAYERGROUP,e)}setSize(e){this.set(Xl.SIZE,e)}setTarget(e){this.set(Xl.TARGET,e)}setView(e){if(!e||e instanceof jl){this.set(Xl.VIEW,e);return}this.set(Xl.VIEW,new jl);let t=this;e.then(function(e){t.setView(new jl(e))})}updateSize(){let e=this.getTargetElement(),t;if(e){let n,r;if(mi(e)){let t=e.getContext(`2d`).getTransform();n=e.width/t.a,r=e.height/t.d}else{let 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l=je(n),u=Me(n),d=Te(n),f=we(n),p=this.transformInv_(l),m=this.transformInv_(u),h=this.transformInv_(d),g=this.transformInv_(f),_=Vd+(a?Math.max(0,Math.ceil(Math.log2(Ce(n)/(a*a*256*256)))):0);if(this.addQuad_(l,u,d,f,p,m,h,g,_),this.wrapsXInSource_){let e=1/0;this.triangles_.forEach(function(t,n,r){e=Math.min(e,t.source[0][0],t.source[1][0],t.source[2][0])}),this.triangles_.forEach(t=>{if(Math.max(t.source[0][0],t.source[1][0],t.source[2][0])-e>this.sourceWorldWidth_/2){let n=[[t.source[0][0],t.source[0][1]],[t.source[1][0],t.source[1][1]],[t.source[2][0],t.source[2][1]]];n[0][0]-e>this.sourceWorldWidth_/2&&(n[0][0]-=this.sourceWorldWidth_),n[1][0]-e>this.sourceWorldWidth_/2&&(n[1][0]-=this.sourceWorldWidth_),n[2][0]-e>this.sourceWorldWidth_/2&&(n[2][0]-=this.sourceWorldWidth_);let r=Math.min(n[0][0],n[1][0],n[2][0]);Math.max(n[0][0],n[1][0],n[2][0])-r.5&&u<1,p=!1;if(c>0&&(this.targetProj_.isGlobal()&&this.targetWorldWidth_&&(p=I(ae([e,t,n,r]))/this.targetWorldWidth_>Hd||p),!f&&this.sourceProj_.isGlobal()&&u&&(p=u>Hd||p)),!p&&this.maxSourceExtent_&&isFinite(l[0])&&isFinite(l[1])&&isFinite(l[2])&&isFinite(l[3])&&!Ne(l,this.maxSourceExtent_))return;let m=0;if(!p&&(!isFinite(i[0])||!isFinite(i[1])||!isFinite(a[0])||!isFinite(a[1])||!isFinite(o[0])||!isFinite(o[1])||!isFinite(s[0])||!isFinite(s[1]))){if(c>0)p=!0;else if(m=(!isFinite(i[0])||!isFinite(i[1])?8:0)+(!isFinite(a[0])||!isFinite(a[1])?4:0)+(!isFinite(o[0])||!isFinite(o[1])?2:0)+ +(!isFinite(s[0])||!isFinite(s[1])),m!=1&&m!=2&&m!=4&&m!=8)return}if(c>0){if(!p){let t=[(e[0]+n[0])/2,(e[1]+n[1])/2],r=this.transformInv_(t),a;a=f?(We(i[0],d)+We(o[0],d))/2-We(r[0],d):(i[0]+o[0])/2-r[0];let s=(i[1]+o[1])/2-r[1];p=a*a+s*s>this.errorThresholdSquared_}if(p){if(Math.abs(e[0]-n[0])<=Math.abs(e[1]-n[1])){let 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u=e.wantedTiles[l],d=o.getMapInternal(),f=Math.max(n-i,c.getMinZoom(),c.getZForResolution(Math.min(o.getMaxResolution(),d?d.getView().getResolutionForZoom(Math.max(o.getMinZoom(),0)):c.getResolution(0)),s.zDirection)),p=a.rotation,m=p?ke(a.center,a.resolution,p,e.size):void 0;for(let i=n;i>=f;--i){let n=c.getTileRangeForExtentAndZ(t,i,this.tempTileRange_),a=c.getResolution(i);for(let t=n.minX;t<=n.maxX;++t)for(let o=n.minY;o<=n.maxY;++o){if(p&&!c.tileCoordIntersectsViewport([i,t,o],m))continue;let n=this.getTile(i,t,o,e);if(!n||!$d(r,n,i))continue;let s=n.getKey();if(u[s]=!0,n.getState()===V.IDLE&&!e.tileQueue.isKeyQueued(s)){let r=qd(i,t,o,this.tempTileCoord_);e.tileQueue.enqueue([n,l,c.getTileCoordCenter(r),a])}}}}findStaleTile_(e,t){let n=this.tileCache_,r=e[0],i=e[1],a=e[2],o=this.getStaleKeys();for(let e=0;e0&&setTimeout(()=>{this.enqueueTiles(e,w,f-1,S,C-1)},0),!(f in S))return this.container;let T=k(this),E=e.time;for(let t of S[f]){let n=t.getState();if(n===V.EMPTY)continue;let r=t.tileCoord;if(n===V.LOADED&&t.getAlpha(T,E)===1){t.endTransition(T);continue}if(n!==V.ERROR&&(this.renderComplete=!1),this.findStaleTile_(r,S)){ef(S,t,f),e.animate=!0;continue}if(this.findAltTiles_(u,r,f+1,S))continue;let i=u.getMinZoom();for(let e=f-1;e>=i&&!this.findAltTiles_(u,r,e,S);--e);}let D=p/a*s/g,O=this.getRenderContext(e);In(this.tempTransform,_/2,v/2,D,D,0,-_/2,-v/2),this.layerExtent&&this.clipUnrotated(O,e,this.layerExtent),l.getInterpolate()||(O.imageSmoothingEnabled=!1),this.preRender(O,e);let A=Object.keys(S).map(Number);A.sort(d);let j,ee=[],te=[];for(let t=A.length-1;t>=0;--t){let n=A[t],r=l.getTilePixelSize(n,s,i),a=u.getResolution(n)/p,o=r[0]*a*D,c=r[1]*a*D,d=u.getTileCoordForCoordAndZ(je(x),n),f=u.getTileCoordExtent(d),m=z(this.tempTransform,[g*(f[0]-x[0])/p,g*(x[3]-f[3])/p]),h=g*l.getGutterForProjection(i);for(let t of S[n]){if(t.getState()!==V.LOADED)continue;let 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0?!0:e.wrapX,transition:e.transition,attributionsCollapsible:e.attributionsCollapsible,zDirection:e.zDirection}),this.gutter_=e.gutter===void 0?0:e.gutter}getGutter(){return this.gutter_}},Nf=`© OpenStreetMap contributors.`,Pf=class extends Mf{constructor(e){e||={};let t;t=e.attributions===void 0?[Nf]:e.attributions;let n=e.url===void 0?`https://tile.openstreetmap.org/{z}/{x}/{y}.png`:e.url;super({attributions:t,attributionsCollapsible:!1,cacheSize:e.cacheSize,crossOrigin:e.crossOrigin===void 0?`anonymous`:e.crossOrigin,referrerPolicy:e.referrerPolicy||`origin-when-cross-origin`,interpolate:e.interpolate,maxZoom:e.maxZoom===void 0?19:e.maxZoom,reprojectionErrorThreshold:e.reprojectionErrorThreshold,tileLoadFunction:e.tileLoadFunction,transition:e.transition,url:n,wrapX:e.wrapX,zDirection:e.zDirection})}},Ff=class extends e{map;constructor(e){super(`mapView`),this.map=e}async 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a/searx/static/themes/simple/chunk/Bc8fcwWx.min.js.map b/searx/static/themes/simple/chunk/BnnvKC7b.min.js.map similarity index 82% rename from searx/static/themes/simple/chunk/Bc8fcwWx.min.js.map rename to searx/static/themes/simple/chunk/BnnvKC7b.min.js.map index 73c2ae16e..05062d97e 100644 --- a/searx/static/themes/simple/chunk/Bc8fcwWx.min.js.map +++ b/searx/static/themes/simple/chunk/BnnvKC7b.min.js.map @@ -1 +1 @@ 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* @module ol/CollectionEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when an item is added to the collection.\n * @event module:ol/Collection.CollectionEvent#add\n * @api\n */\n ADD: 'add',\n /**\n * Triggered when an item is removed from the collection.\n * @event module:ol/Collection.CollectionEvent#remove\n * @api\n */\n REMOVE: 'remove',\n};\n","/**\n * @module ol/ObjectEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when a property is changed.\n * @event module:ol/Object.ObjectEvent#propertychange\n * @api\n */\n PROPERTYCHANGE: 'propertychange',\n};\n\n/**\n * @typedef {'propertychange'} Types\n */\n","/**\n * @module ol/obj\n */\n\n/**\n * Removes all properties from an object.\n * @param {Object} object The object to clear.\n */\nexport function clear(object) {\n for (const property in object) {\n delete object[property];\n }\n}\n\n/**\n * Determine if an object has any properties.\n * @param {Object} object The object to check.\n * @return {boolean} The object is empty.\n */\nexport function isEmpty(object) {\n let property;\n for (property in object) {\n return false;\n }\n return !property;\n}\n","/**\n * @module ol/events\n */\nimport {clear} from './obj.js';\n\n/**\n * Key to use with {@link module:ol/Observable.unByKey}.\n * @typedef {Object} EventsKey\n * @property {ListenerFunction} listener Listener.\n * @property {import(\"./events/Target.js\").EventTargetLike} target Target.\n * @property {string} type Type.\n * @api\n */\n\n/**\n * Listener function. This function is called with an event object as argument.\n * When the function returns `false`, event propagation will stop.\n *\n * @typedef {function((Event|import(\"./events/Event.js\").default)): (void|boolean)} ListenerFunction\n * @api\n */\n\n/**\n * @typedef {Object} ListenerObject\n * @property {ListenerFunction} handleEvent HandleEvent listener function.\n */\n\n/**\n * @typedef {ListenerFunction|ListenerObject} Listener\n */\n\n/**\n * Registers an event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` to a `this` object, and returns\n * a key for use with {@link module:ol/events.unlistenByKey}.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object} [thisArg] Object referenced by the `this` keyword in the\n * listener. Default is the `target`.\n * @param {boolean} [once] If true, add the listener as one-off listener.\n * @return {EventsKey} Unique key for the listener.\n */\nexport function listen(target, type, listener, thisArg, once) {\n if (once) {\n const originalListener = listener;\n /**\n * @param {Event|import('./events/Event.js').default} event The event\n * @return {void|boolean} When the function returns `false`, event propagation will stop.\n * @this {typeof target}\n */\n listener = function (event) {\n target.removeEventListener(type, listener);\n return originalListener.call(thisArg ?? this, event);\n };\n } else if (thisArg && thisArg !== target) {\n listener = listener.bind(thisArg);\n }\n const eventsKey = {\n target: target,\n type: type,\n listener: listener,\n };\n target.addEventListener(type, listener);\n return eventsKey;\n}\n\n/**\n * Registers a one-off event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` as self-unregistering listener\n * to a `this` object, and returns a key for use with\n * {@link module:ol/events.unlistenByKey} in case the listener needs to be\n * unregistered before it is called.\n *\n * When {@link module:ol/events.listen} is called with the same arguments after this\n * function, the self-unregistering listener will be turned into a permanent\n * listener.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object} [thisArg] Object referenced by the `this` keyword in the\n * listener. Default is the `target`.\n * @return {EventsKey} Key for unlistenByKey.\n */\nexport function listenOnce(target, type, listener, thisArg) {\n return listen(target, type, listener, thisArg, true);\n}\n\n/**\n * Unregisters event listeners on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * The argument passed to this function is the key returned from\n * {@link module:ol/events.listen} or {@link module:ol/events.listenOnce}.\n *\n * @param {EventsKey} key The key.\n */\nexport function unlistenByKey(key) {\n if (key && key.target) {\n key.target.removeEventListener(key.type, key.listener);\n clear(key);\n }\n}\n","/**\n * @module ol/events/EventType\n */\n\n/**\n * @enum {string}\n * @const\n */\nexport default {\n /**\n * Generic change event. Triggered when the revision counter is increased.\n * @event module:ol/events/Event~BaseEvent#change\n * @api\n */\n CHANGE: 'change',\n\n /**\n * Generic error event. Triggered when an error occurs.\n * @event module:ol/events/Event~BaseEvent#error\n * @api\n */\n ERROR: 'error',\n\n BLUR: 'blur',\n CLEAR: 'clear',\n CONTEXTMENU: 'contextmenu',\n CLICK: 'click',\n DBLCLICK: 'dblclick',\n DRAGENTER: 'dragenter',\n DRAGOVER: 'dragover',\n DROP: 'drop',\n FOCUS: 'focus',\n KEYDOWN: 'keydown',\n KEYPRESS: 'keypress',\n LOAD: 'load',\n RESIZE: 'resize',\n TOUCHMOVE: 'touchmove',\n WHEEL: 'wheel',\n};\n","/**\n * @module ol/Disposable\n */\n\n/**\n * @classdesc\n * Objects that need to clean up after themselves.\n */\nclass Disposable {\n constructor() {\n /**\n * The object has already been disposed.\n * @type {boolean}\n * @protected\n */\n this.disposed = false;\n }\n\n /**\n * Clean up.\n */\n dispose() {\n if (!this.disposed) {\n this.disposed = true;\n this.disposeInternal();\n }\n }\n\n /**\n * Extension point for disposable objects.\n * @protected\n */\n disposeInternal() {}\n}\n\nexport default Disposable;\n","/**\n * @module ol/array\n */\n\n/**\n * Performs a binary search on the provided sorted list and returns the index of the item if found. If it can't be found it'll return -1.\n * https://github.com/darkskyapp/binary-search\n *\n * @param {Array<*>} haystack Items to search through.\n * @param {*} needle The item to look for.\n * @param {Function} [comparator] Comparator function.\n * @return {number} The index of the item if found, -1 if not.\n */\nexport function binarySearch(haystack, needle, comparator) {\n let mid, cmp;\n comparator = comparator || ascending;\n let low = 0;\n let high = haystack.length;\n let found = false;\n\n while (low < high) {\n /* Note that \"(low + high) >>> 1\" may overflow, and results in a typecast\n * to double (which gives the wrong results). */\n mid = low + ((high - low) >> 1);\n cmp = +comparator(haystack[mid], needle);\n\n if (cmp < 0.0) {\n /* Too low. */\n low = mid + 1;\n } else {\n /* Key found or too high */\n high = mid;\n found = !cmp;\n }\n }\n\n /* Key not found. */\n return found ? low : ~low;\n}\n\n/**\n * Compare function sorting arrays in ascending order. Safe to use for numeric values.\n * @param {*} a The first object to be compared.\n * @param {*} b The second object to be compared.\n * @return {number} A negative number, zero, or a positive number as the first\n * argument is less than, equal to, or greater than the second.\n */\nexport function ascending(a, b) {\n return a > b ? 1 : a < b ? -1 : 0;\n}\n\n/**\n * Compare function sorting arrays in descending order. Safe to use for numeric values.\n * @param {*} a The first object to be compared.\n * @param {*} b The second object to be compared.\n * @return {number} A negative number, zero, or a positive number as the first\n * argument is greater than, equal to, or less than the second.\n */\nexport function descending(a, b) {\n return a < b ? 1 : a > b ? -1 : 0;\n}\n\n/**\n * {@link module:ol/tilegrid/TileGrid~TileGrid#getZForResolution} can use a function\n * of this type to determine which nearest resolution to use.\n *\n * This function takes a `{number}` representing a value between two array entries,\n * a `{number}` representing the value of the nearest higher entry and\n * a `{number}` representing the value of the nearest lower entry\n * as arguments and returns a `{number}`. If a negative number or zero is returned\n * the lower value will be used, if a positive number is returned the higher value\n * will be used.\n * @typedef {function(number, number, number): number} NearestDirectionFunction\n * @api\n */\n\n/**\n * @param {Array} arr Array in descending order.\n * @param {number} target Target.\n * @param {number|NearestDirectionFunction} direction\n * 0 means return the nearest,\n * > 0 means return the largest nearest,\n * < 0 means return the smallest nearest.\n * @return {number} Index.\n */\nexport function linearFindNearest(arr, target, direction) {\n if (arr[0] <= target) {\n return 0;\n }\n\n const n = arr.length;\n if (target <= arr[n - 1]) {\n return n - 1;\n }\n\n if (typeof direction === 'function') {\n for (let i = 1; i < n; ++i) {\n const candidate = arr[i];\n if (candidate === target) {\n return i;\n }\n if (candidate < target) {\n if (direction(target, arr[i - 1], candidate) > 0) {\n return i - 1;\n }\n return i;\n }\n }\n return n - 1;\n }\n\n if (direction > 0) {\n for (let i = 1; i < n; ++i) {\n if (arr[i] < target) {\n return i - 1;\n }\n }\n return n - 1;\n }\n\n if (direction < 0) {\n for (let i = 1; i < n; ++i) {\n if (arr[i] <= target) {\n return i;\n }\n }\n return n - 1;\n }\n\n for (let i = 1; i < n; ++i) {\n if (arr[i] == target) {\n return i;\n }\n if (arr[i] < target) {\n if (arr[i - 1] - target < target - arr[i]) {\n return i - 1;\n }\n return i;\n }\n }\n return n - 1;\n}\n\n/**\n * @param {Array<*>} arr Array.\n * @param {number} begin Begin index.\n * @param {number} end End index.\n */\nexport function reverseSubArray(arr, begin, end) {\n while (begin < end) {\n const tmp = arr[begin];\n arr[begin] = arr[end];\n arr[end] = tmp;\n ++begin;\n --end;\n }\n}\n\n/**\n * @param {Array} arr The array to modify.\n * @param {!Array|VALUE} data The elements or arrays of elements to add to arr.\n * @template VALUE\n */\nexport function extend(arr, data) {\n const extension = Array.isArray(data) ? data : [data];\n const length = extension.length;\n for (let i = 0; i < length; i++) {\n arr[arr.length] = extension[i];\n }\n}\n\n/**\n * @param {Array} arr The array to modify.\n * @param {VALUE} obj The element to remove.\n * @template VALUE\n * @return {boolean} If the element was removed.\n */\nexport function remove(arr, obj) {\n const i = arr.indexOf(obj);\n const found = i > -1;\n if (found) {\n arr.splice(i, 1);\n }\n return found;\n}\n\n/**\n * @param {Array|Uint8ClampedArray} arr1 The first array to compare.\n * @param {Array|Uint8ClampedArray} arr2 The second array to compare.\n * @return {boolean} Whether the two arrays are equal.\n */\nexport function equals(arr1, arr2) {\n const len1 = arr1.length;\n if (len1 !== arr2.length) {\n return false;\n }\n for (let i = 0; i < len1; i++) {\n if (arr1[i] !== arr2[i]) {\n return false;\n }\n }\n return true;\n}\n\n/**\n * Sort the passed array such that the relative order of equal elements is preserved.\n * See https://en.wikipedia.org/wiki/Sorting_algorithm#Stability for details.\n * @param {Array<*>} arr The array to sort (modifies original).\n * @param {!function(*, *): number} compareFnc Comparison function.\n * @api\n * @deprecated\n */\nexport function stableSort(arr, compareFnc) {\n const length = arr.length;\n const tmp = Array(arr.length);\n let i;\n for (i = 0; i < length; i++) {\n tmp[i] = {index: i, value: arr[i]};\n }\n tmp.sort(function (a, b) {\n return compareFnc(a.value, b.value) || a.index - b.index;\n });\n for (i = 0; i < arr.length; i++) {\n arr[i] = tmp[i].value;\n }\n}\n\n/**\n * @param {Array<*>} arr The array to test.\n * @param {Function} [func] Comparison function.\n * @param {boolean} [strict] Strictly sorted (default false).\n * @return {boolean} Return index.\n */\nexport function isSorted(arr, func, strict) {\n const compare = func || ascending;\n return arr.every(function (currentVal, index) {\n if (index === 0) {\n return true;\n }\n const res = compare(arr[index - 1], currentVal);\n return !(res > 0 || (strict && res === 0));\n });\n}\n","/**\n * @module ol/functions\n */\n\nimport {equals as arrayEquals} from './array.js';\n\n/**\n * Always returns true.\n * @return {boolean} true.\n */\nexport function TRUE() {\n return true;\n}\n\n/**\n * Always returns false.\n * @return {boolean} false.\n */\nexport function FALSE() {\n return false;\n}\n\n/**\n * A reusable function, used e.g. as a default for callbacks.\n *\n * @return {void} Nothing.\n */\nexport function VOID() {}\n\n/**\n * Wrap a function in another function that remembers the last return. If the\n * returned function is called twice in a row with the same arguments and the same\n * this object, it will return the value from the first call in the second call.\n *\n * @param {function(...any): ReturnType} fn The function to memoize.\n * @return {function(...any): ReturnType} The memoized function.\n * @template ReturnType\n */\nexport function memoizeOne(fn) {\n /** @type {ReturnType} */\n let lastResult;\n\n /** @type {Array|undefined} */\n let lastArgs;\n\n let lastThis;\n\n /**\n * @this {*} Only need to know if `this` changed, don't care what type\n * @return {ReturnType} Memoized value\n */\n return function () {\n const nextArgs = Array.prototype.slice.call(arguments);\n if (!lastArgs || this !== lastThis || !arrayEquals(nextArgs, lastArgs)) {\n lastThis = this;\n lastArgs = nextArgs;\n lastResult = fn.apply(this, arguments);\n }\n return lastResult;\n };\n}\n\n/**\n * @template T\n * @param {function(): (T | Promise)} getter A function that returns a value or a promise for a value.\n * @return {Promise} A promise for the value.\n */\nexport function toPromise(getter) {\n function promiseGetter() {\n let value;\n try {\n value = getter();\n } catch (err) {\n return Promise.reject(err);\n }\n if (value instanceof Promise) {\n return value;\n }\n return Promise.resolve(value);\n }\n return promiseGetter();\n}\n","/**\n * @module ol/events/Event\n */\n\n/**\n * @classdesc\n * Stripped down implementation of the W3C DOM Level 2 Event interface.\n * See https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-interface.\n *\n * This implementation only provides `type` and `target` properties, and\n * `stopPropagation` and `preventDefault` methods. It is meant as base class\n * for higher level events defined in the library, and works with\n * {@link module:ol/events/Target~Target}.\n */\nclass BaseEvent {\n /**\n * @param {string} type Type.\n */\n constructor(type) {\n /**\n * @type {boolean}\n */\n this.propagationStopped;\n\n /**\n * @type {boolean}\n */\n this.defaultPrevented;\n\n /**\n * The event type.\n * @type {string}\n * @api\n */\n this.type = type;\n\n /**\n * The event target.\n * @type {Object}\n * @api\n */\n this.target = null;\n }\n\n /**\n * Prevent default. This means that no emulated `click`, `singleclick` or `doubleclick` events\n * will be fired.\n * @api\n */\n preventDefault() {\n this.defaultPrevented = true;\n }\n\n /**\n * Stop event propagation.\n * @api\n */\n stopPropagation() {\n this.propagationStopped = true;\n }\n}\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function stopPropagation(evt) {\n evt.stopPropagation();\n}\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function preventDefault(evt) {\n evt.preventDefault();\n}\n\nexport default BaseEvent;\n","/**\n * @module ol/events/Target\n */\nimport Disposable from '../Disposable.js';\nimport {VOID} from '../functions.js';\nimport {clear} from '../obj.js';\nimport Event from './Event.js';\n\n/**\n * @typedef {EventTarget|Target} EventTargetLike\n */\n\n/**\n * @classdesc\n * A simplified implementation of the W3C DOM Level 2 EventTarget interface.\n * See https://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html#Events-EventTarget.\n *\n * There are two important simplifications compared to the specification:\n *\n * 1. The handling of `useCapture` in `addEventListener` and\n * `removeEventListener`. There is no real capture model.\n * 2. The handling of `stopPropagation` and `preventDefault` on `dispatchEvent`.\n * There is no event target hierarchy. When a listener calls\n * `stopPropagation` or `preventDefault` on an event object, it means that no\n * more listeners after this one will be called. Same as when the listener\n * returns false.\n */\nclass Target extends Disposable {\n /**\n * @param {*} [target] Default event target for dispatched events.\n */\n constructor(target) {\n super();\n\n /**\n * @private\n * @type {*}\n */\n this.eventTarget_ = target;\n\n /**\n * @private\n * @type {Object|null}\n */\n this.pendingRemovals_ = null;\n\n /**\n * @private\n * @type {Object|null}\n */\n this.dispatching_ = null;\n\n /**\n * @private\n * @type {Object>|null}\n */\n this.listeners_ = null;\n }\n\n /**\n * @param {string} type Type.\n * @param {import(\"../events.js\").Listener} listener Listener.\n */\n addEventListener(type, listener) {\n if (!type || !listener) {\n return;\n }\n const listeners = this.listeners_ || (this.listeners_ = {});\n const listenersForType = listeners[type] || (listeners[type] = []);\n if (!listenersForType.includes(listener)) {\n listenersForType.push(listener);\n }\n }\n\n /**\n * Dispatches an event and calls all listeners listening for events\n * of this type. The event parameter can either be a string or an\n * Object with a `type` property.\n *\n * @param {import(\"./Event.js\").default|string} event Event object.\n * @return {boolean|undefined} `false` if anyone called preventDefault on the\n * event object or if any of the listeners returned false.\n * @api\n */\n dispatchEvent(event) {\n const isString = typeof event === 'string';\n const type = isString ? event : event.type;\n const listeners = this.listeners_ && this.listeners_[type];\n if (!listeners) {\n return;\n }\n\n const evt = isString ? new Event(event) : /** @type {Event} */ (event);\n if (!evt.target) {\n evt.target = this.eventTarget_ || this;\n }\n const dispatching = this.dispatching_ || (this.dispatching_ = {});\n const pendingRemovals =\n this.pendingRemovals_ || (this.pendingRemovals_ = {});\n if (!(type in dispatching)) {\n dispatching[type] = 0;\n pendingRemovals[type] = 0;\n }\n ++dispatching[type];\n let propagate;\n for (let i = 0, ii = listeners.length; i < ii; ++i) {\n if ('handleEvent' in listeners[i]) {\n propagate = /** @type {import(\"../events.js\").ListenerObject} */ (\n listeners[i]\n ).handleEvent(evt);\n } else {\n propagate = /** @type {import(\"../events.js\").ListenerFunction} */ (\n listeners[i]\n ).call(this, evt);\n }\n if (propagate === false || evt.propagationStopped) {\n propagate = false;\n break;\n }\n }\n if (--dispatching[type] === 0) {\n let pr = pendingRemovals[type];\n delete pendingRemovals[type];\n while (pr--) {\n this.removeEventListener(type, VOID);\n }\n delete dispatching[type];\n }\n return propagate;\n }\n\n /**\n * Clean up.\n * @override\n */\n disposeInternal() {\n this.listeners_ && clear(this.listeners_);\n }\n\n /**\n * Get the listeners for a specified event type. Listeners are returned in the\n * order that they will be called in.\n *\n * @param {string} type Type.\n * @return {Array|undefined} Listeners.\n */\n getListeners(type) {\n return (this.listeners_ && this.listeners_[type]) || undefined;\n }\n\n /**\n * @param {string} [type] Type. If not provided,\n * `true` will be returned if this event target has any listeners.\n * @return {boolean} Has listeners.\n */\n hasListener(type) {\n if (!this.listeners_) {\n return false;\n }\n return type\n ? type in this.listeners_\n : Object.keys(this.listeners_).length > 0;\n }\n\n /**\n * @param {string} type Type.\n * @param {import(\"../events.js\").Listener} listener Listener.\n */\n removeEventListener(type, listener) {\n if (!this.listeners_) {\n return;\n }\n const listeners = this.listeners_[type];\n if (!listeners) {\n return;\n }\n const index = listeners.indexOf(listener);\n if (index !== -1) {\n if (this.pendingRemovals_ && type in this.pendingRemovals_) {\n // make listener a no-op, and remove later in #dispatchEvent()\n listeners[index] = VOID;\n ++this.pendingRemovals_[type];\n } else {\n listeners.splice(index, 1);\n if (listeners.length === 0) {\n delete this.listeners_[type];\n }\n }\n }\n }\n}\n\nexport default Target;\n","/**\n * @module ol/Observable\n */\nimport {listen, listenOnce, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\nimport EventTarget from './events/Target.js';\n\n/***\n * @template {string} Type\n * @template {Event|import(\"./events/Event.js\").default} EventClass\n * @template Return\n * @typedef {(type: Type, listener: (event: EventClass) => ?) => Return} OnSignature\n */\n\n/***\n * @template {string} Type\n * @template Return\n * @typedef {(type: Type[], listener: (event: Event|import(\"./events/Event.js\").default) => ?) => Return extends void ? void : Return[]} CombinedOnSignature\n */\n\n/**\n * @typedef {'change'|'error'} EventTypes\n */\n\n/***\n * @template Return\n * @typedef {OnSignature & CombinedOnSignature} ObservableOnSignature\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * An event target providing convenient methods for listener registration\n * and unregistration. A generic `change` event is always available through\n * {@link module:ol/Observable~Observable#changed}.\n *\n * @fires import(\"./events/Event.js\").default\n * @api\n */\nclass Observable extends EventTarget {\n constructor() {\n super();\n\n this.on =\n /** @type {ObservableOnSignature} */ (\n this.onInternal\n );\n\n this.once =\n /** @type {ObservableOnSignature} */ (\n this.onceInternal\n );\n\n this.un = /** @type {ObservableOnSignature} */ (this.unInternal);\n\n /**\n * @private\n * @type {number}\n */\n this.revision_ = 0;\n }\n\n /**\n * Increases the revision counter and dispatches a 'change' event.\n * @api\n */\n changed() {\n ++this.revision_;\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * Get the version number for this object. Each time the object is modified,\n * its version number will be incremented.\n * @return {number} Revision.\n * @api\n */\n getRevision() {\n return this.revision_;\n }\n\n /**\n * @param {string|Array} type Type.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener Listener.\n * @return {import(\"./events.js\").EventsKey|Array} Event key.\n * @protected\n */\n onInternal(type, listener) {\n if (Array.isArray(type)) {\n const len = type.length;\n const keys = new Array(len);\n for (let i = 0; i < len; ++i) {\n keys[i] = listen(this, type[i], listener);\n }\n return keys;\n }\n return listen(this, /** @type {string} */ (type), listener);\n }\n\n /**\n * @param {string|Array} type Type.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener Listener.\n * @return {import(\"./events.js\").EventsKey|Array} Event key.\n * @protected\n */\n onceInternal(type, listener) {\n let key;\n if (Array.isArray(type)) {\n const len = type.length;\n key = new Array(len);\n for (let i = 0; i < len; ++i) {\n key[i] = listenOnce(this, type[i], listener);\n }\n } else {\n key = listenOnce(this, /** @type {string} */ (type), listener);\n }\n /** @type {Object} */ (listener).ol_key = key;\n return key;\n }\n\n /**\n * Unlisten for a certain type of event.\n * @param {string|Array} type Type.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener Listener.\n * @protected\n */\n unInternal(type, listener) {\n const key = /** @type {Object} */ (listener).ol_key;\n if (key) {\n unByKey(key);\n } else if (Array.isArray(type)) {\n for (let i = 0, ii = type.length; i < ii; ++i) {\n this.removeEventListener(type[i], listener);\n }\n } else {\n this.removeEventListener(type, listener);\n }\n }\n}\n\n/**\n * Listen for a certain type of event.\n * @function\n * @param {string|Array} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener The listener function.\n * @return {import(\"./events.js\").EventsKey|Array} Unique key for the listener. If\n * called with an array of event types as the first argument, the return\n * will be an array of keys.\n * @api\n */\nObservable.prototype.on;\n\n/**\n * Listen once for a certain type of event.\n * @function\n * @param {string|Array} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener The listener function.\n * @return {import(\"./events.js\").EventsKey|Array} Unique key for the listener. If\n * called with an array of event types as the first argument, the return\n * will be an array of keys.\n * @api\n */\nObservable.prototype.once;\n\n/**\n * Unlisten for a certain type of event.\n * @function\n * @param {string|Array} type The event type or array of event types.\n * @param {function((Event|import(\"./events/Event.js\").default)): ?} listener The listener function.\n * @api\n */\nObservable.prototype.un;\n\n/**\n * Removes an event listener using the key returned by `on()` or `once()`.\n * @param {import(\"./events.js\").EventsKey|Array} key The key returned by `on()`\n * or `once()` (or an array of keys).\n * @api\n */\nexport function unByKey(key) {\n if (Array.isArray(key)) {\n for (let i = 0, ii = key.length; i < ii; ++i) {\n unlistenByKey(key[i]);\n }\n } else {\n unlistenByKey(/** @type {import(\"./events.js\").EventsKey} */ (key));\n }\n}\n\nexport default Observable;\n","/**\n * @module ol/util\n */\n\n/**\n * @return {never} Any return.\n */\nexport function abstract() {\n throw new Error('Unimplemented abstract method.');\n}\n\n/**\n * Counter for getUid.\n * @type {number}\n * @private\n */\nlet uidCounter_ = 0;\n\n/**\n * Gets a unique ID for an object. This mutates the object so that further calls\n * with the same object as a parameter returns the same value. Unique IDs are generated\n * as a strictly increasing sequence. Adapted from goog.getUid.\n *\n * @param {Object} obj The object to get the unique ID for.\n * @return {string} The unique ID for the object.\n * @api\n */\nexport function getUid(obj) {\n return obj.ol_uid || (obj.ol_uid = String(++uidCounter_));\n}\n\n/**\n * OpenLayers version.\n * @type {string}\n */\nexport const VERSION = '10.9.0';\n","/**\n * @module ol/Object\n */\nimport ObjectEventType from './ObjectEventType.js';\nimport Observable from './Observable.js';\nimport Event from './events/Event.js';\nimport {isEmpty} from './obj.js';\nimport {getUid} from './util.js';\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Object~BaseObject} instances are instances of this type.\n */\nexport class ObjectEvent extends Event {\n /**\n * @param {string} type The event type.\n * @param {string} key The property name.\n * @param {*} oldValue The old value for `key`.\n */\n constructor(type, key, oldValue) {\n super(type);\n\n /**\n * The name of the property whose value is changing.\n * @type {string}\n * @api\n */\n this.key = key;\n\n /**\n * The old value. To get the new value use `e.target.get(e.key)` where\n * `e` is the event object.\n * @type {*}\n * @api\n */\n this.oldValue = oldValue;\n }\n}\n\n/***\n * @template Return\n * @typedef {import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").CombinedOnSignature} ObjectOnSignature\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Most non-trivial classes inherit from this.\n *\n * This extends {@link module:ol/Observable~Observable} with observable\n * properties, where each property is observable as well as the object as a\n * whole.\n *\n * Classes that inherit from this have pre-defined properties, to which you can\n * add your owns. The pre-defined properties are listed in this documentation as\n * 'Observable Properties', and have their own accessors; for example,\n * {@link module:ol/Map~Map} has a `target` property, accessed with\n * `getTarget()` and changed with `setTarget()`. Not all properties are however\n * settable. There are also general-purpose accessors `get()` and `set()`. For\n * example, `get('target')` is equivalent to `getTarget()`.\n *\n * The `set` accessors trigger a change event, and you can monitor this by\n * registering a listener. For example, {@link module:ol/View~View} has a\n * `center` property, so `view.on('change:center', function(evt) {...});` would\n * call the function whenever the value of the center property changes. Within\n * the function, `evt.target` would be the view, so `evt.target.getCenter()`\n * would return the new center.\n *\n * You can add your own observable properties with\n * `object.set('prop', 'value')`, and retrieve that with `object.get('prop')`.\n * You can listen for changes on that property value with\n * `object.on('change:prop', listener)`. You can get a list of all\n * properties with {@link module:ol/Object~BaseObject#getProperties}.\n *\n * Note that the observable properties are separate from standard JS properties.\n * You can, for example, give your map object a title with\n * `map.title='New title'` and with `map.set('title', 'Another title')`. The\n * first will be a `hasOwnProperty`; the second will appear in\n * `getProperties()`. Only the second is observable.\n *\n * Properties can be deleted by using the unset method. E.g.\n * object.unset('foo').\n *\n * @fires ObjectEvent\n * @template {Object} [Properties=Object]\n * @api\n */\nclass BaseObject extends Observable {\n /**\n * @param {NoInfer} [values] An object with key-value pairs.\n */\n constructor(values) {\n super();\n\n /***\n * @type {ObjectOnSignature}\n */\n this.on;\n\n /***\n * @type {ObjectOnSignature}\n */\n this.once;\n\n /***\n * @type {ObjectOnSignature}\n */\n this.un;\n\n // Call {@link module:ol/util.getUid} to ensure that the order of objects' ids is\n // the same as the order in which they were created. This also helps to\n // ensure that object properties are always added in the same order, which\n // helps many JavaScript engines generate faster code.\n getUid(this);\n\n /**\n * @private\n * @type {Partial>|null}\n */\n this.values_ = null;\n\n if (values !== undefined) {\n this.setProperties(values);\n }\n }\n\n /**\n * Gets a value.\n * @param {string} key Key name.\n * @return {*} Value.\n * @api\n */\n get(key) {\n let value;\n if (this.values_ && this.values_.hasOwnProperty(key)) {\n value = this.values_[key];\n }\n return value;\n }\n\n /**\n * Get a list of object property names.\n * @return {Array} List of property names.\n * @api\n */\n getKeys() {\n return (this.values_ && Object.keys(this.values_)) || [];\n }\n\n /**\n * Get an object of all property names and values.\n * @return {NoInfer} Object.\n * @api\n */\n getProperties() {\n return /** @type {NoInfer} */ (\n (this.values_ && Object.assign({}, this.values_)) || {}\n );\n }\n\n /**\n * Get an object of all property names and values.\n * @return {Partial>?} Object.\n */\n getPropertiesInternal() {\n return this.values_;\n }\n\n /**\n * @return {boolean} The object has properties.\n */\n hasProperties() {\n return !!this.values_;\n }\n\n /**\n * @param {string} key Key name.\n * @param {*} oldValue Old value.\n */\n notify(key, oldValue) {\n let eventType;\n eventType = `change:${key}`;\n if (this.hasListener(eventType)) {\n this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n }\n eventType = ObjectEventType.PROPERTYCHANGE;\n if (this.hasListener(eventType)) {\n this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n }\n }\n\n /**\n * @param {string} key Key name.\n * @param {import(\"./events.js\").Listener} listener Listener.\n */\n addChangeListener(key, listener) {\n this.addEventListener(`change:${key}`, listener);\n }\n\n /**\n * @param {string} key Key name.\n * @param {import(\"./events.js\").Listener} listener Listener.\n */\n removeChangeListener(key, listener) {\n this.removeEventListener(`change:${key}`, listener);\n }\n\n /**\n * Sets a value.\n * @param {string} key Key name.\n * @param {*} value Value.\n * @param {boolean} [silent] Update without triggering an event.\n * @api\n */\n set(key, value, silent) {\n const values = this.values_ || (this.values_ = {});\n if (silent) {\n values[key] = value;\n } else {\n const oldValue = values[key];\n values[key] = value;\n if (oldValue !== value) {\n this.notify(key, oldValue);\n }\n }\n }\n\n /**\n * Sets a collection of key-value pairs. Note that this changes any existing\n * properties and adds new ones (it does not remove any existing properties).\n * @param {Partial>} values Values.\n * @param {boolean} [silent] Update without triggering an event.\n * @api\n */\n setProperties(values, silent) {\n for (const key in values) {\n this.set(key, values[key], silent);\n }\n }\n\n /**\n * Apply any properties from another object without triggering events.\n * @param {BaseObject} source The source object.\n * @protected\n */\n applyProperties(source) {\n if (!source.values_) {\n return;\n }\n Object.assign(this.values_ || (this.values_ = {}), source.values_);\n }\n\n /**\n * Unsets a property.\n * @param {string} key Key name.\n * @param {boolean} [silent] Unset without triggering an event.\n * @api\n */\n unset(key, silent) {\n if (this.values_ && key in this.values_) {\n const oldValue = this.values_[key];\n delete this.values_[key];\n if (isEmpty(this.values_)) {\n this.values_ = null;\n }\n if (!silent) {\n this.notify(key, oldValue);\n }\n }\n }\n}\n\nexport default BaseObject;\n","/**\n * @module ol/Collection\n */\nimport CollectionEventType from './CollectionEventType.js';\nimport BaseObject from './Object.js';\nimport Event from './events/Event.js';\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n LENGTH: 'length',\n};\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Collection~Collection} instances are instances of this\n * type.\n * @template T\n */\nexport class CollectionEvent extends Event {\n /**\n * @param {import(\"./CollectionEventType.js\").default} type Type.\n * @param {T} element Element.\n * @param {number} index The index of the added or removed element.\n */\n constructor(type, element, index) {\n super(type);\n\n /**\n * The element that is added to or removed from the collection.\n * @type {T}\n * @api\n */\n this.element = element;\n\n /**\n * The index of the added or removed element.\n * @type {number}\n * @api\n */\n this.index = index;\n }\n}\n\n/***\n * @template T\n * @template Return\n * @typedef {import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").OnSignature<'add'|'remove', CollectionEvent, Return> &\n * import(\"./Observable.js\").CombinedOnSignature} CollectionOnSignature\n */\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [unique=false] Disallow the same item from being added to\n * the collection twice.\n */\n\n/**\n * @classdesc\n * An expanded version of standard JS Array, adding convenience methods for\n * manipulation. Add and remove changes to the Collection trigger a Collection\n * event. Note that this does not cover changes to the objects _within_ the\n * Collection; they trigger events on the appropriate object, not on the\n * Collection as a whole.\n *\n * @fires CollectionEvent\n *\n * @template T\n * @api\n */\nclass Collection extends BaseObject {\n /**\n * @param {Array} [array] Array.\n * @param {Options} [options] Collection options.\n */\n constructor(array, options) {\n super();\n\n /***\n * @type {CollectionOnSignature}\n */\n this.on;\n\n /***\n * @type {CollectionOnSignature}\n */\n this.once;\n\n /***\n * @type {CollectionOnSignature}\n */\n this.un;\n\n options = options || {};\n\n /**\n * @private\n * @type {boolean}\n */\n this.unique_ = !!options.unique;\n\n /**\n * @private\n * @type {!Array}\n */\n this.array_ = array ?? [];\n\n if (this.unique_) {\n for (let i = 1, ii = this.array_.length; i < ii; ++i) {\n this.assertUnique_(this.array_[i], i);\n }\n }\n\n this.updateLength_();\n }\n\n /**\n * Remove all elements from the collection.\n * @api\n */\n clear() {\n while (this.getLength() > 0) {\n this.pop();\n }\n }\n\n /**\n * Add elements to the collection. This pushes each item in the provided array\n * to the end of the collection.\n * @param {!Array} arr Array.\n * @return {Collection} This collection.\n * @api\n */\n extend(arr) {\n for (let i = 0, ii = arr.length; i < ii; ++i) {\n this.push(arr[i]);\n }\n return this;\n }\n\n /**\n * Iterate over each element, calling the provided callback.\n * @param {function(T, number, Array): *} f The function to call\n * for every element. This function takes 3 arguments (the element, the\n * index and the array). The return value is ignored.\n * @api\n */\n forEach(f) {\n const array = this.array_;\n for (let i = 0, ii = array.length; i < ii; ++i) {\n f(array[i], i, array);\n }\n }\n\n /**\n * Get a reference to the underlying Array object. Warning: if the array\n * is mutated, no events will be dispatched by the collection, and the\n * collection's \"length\" property won't be in sync with the actual length\n * of the array.\n * @return {!Array} Array.\n * @api\n */\n getArray() {\n return this.array_;\n }\n\n /**\n * Get the element at the provided index.\n * @param {number} index Index.\n * @return {T} Element.\n * @api\n */\n item(index) {\n return this.array_[index];\n }\n\n /**\n * Get the length of this collection.\n * @return {number} The length of the array.\n * @observable\n * @api\n */\n getLength() {\n return this.get(Property.LENGTH);\n }\n\n /**\n * Insert an element at the provided index.\n * @param {number} index Index.\n * @param {T} elem Element.\n * @api\n */\n insertAt(index, elem) {\n if (index < 0 || index > this.getLength()) {\n throw new Error('Index out of bounds: ' + index);\n }\n if (this.unique_) {\n this.assertUnique_(elem);\n }\n this.array_.splice(index, 0, elem);\n this.updateLength_();\n this.dispatchEvent(\n new CollectionEvent(CollectionEventType.ADD, elem, index),\n );\n }\n\n /**\n * Remove the last element of the collection and return it.\n * Return `undefined` if the collection is empty.\n * @return {T|undefined} Element.\n * @api\n */\n pop() {\n return this.removeAt(this.getLength() - 1);\n }\n\n /**\n * Insert the provided element at the end of the collection.\n * @param {T} elem Element.\n * @return {number} New length of the collection.\n * @api\n */\n push(elem) {\n const n = this.getLength();\n this.insertAt(n, elem);\n return this.getLength();\n }\n\n /**\n * Remove the first occurrence of an element from the collection.\n * @param {T} elem Element.\n * @return {T|undefined} The removed element or undefined if none found.\n * @api\n */\n remove(elem) {\n const arr = this.array_;\n for (let i = 0, ii = arr.length; i < ii; ++i) {\n if (arr[i] === elem) {\n return this.removeAt(i);\n }\n }\n return undefined;\n }\n\n /**\n * Remove the element at the provided index and return it.\n * Return `undefined` if the collection does not contain this index.\n * @param {number} index Index.\n * @return {T|undefined} Value.\n * @api\n */\n removeAt(index) {\n if (index < 0 || index >= this.getLength()) {\n return undefined;\n }\n const prev = this.array_[index];\n this.array_.splice(index, 1);\n this.updateLength_();\n this.dispatchEvent(\n /** @type {CollectionEvent} */ (\n new CollectionEvent(CollectionEventType.REMOVE, prev, index)\n ),\n );\n return prev;\n }\n\n /**\n * Set the element at the provided index.\n * @param {number} index Index.\n * @param {T} elem Element.\n * @api\n */\n setAt(index, elem) {\n const n = this.getLength();\n if (index >= n) {\n this.insertAt(index, elem);\n return;\n }\n if (index < 0) {\n throw new Error('Index out of bounds: ' + index);\n }\n if (this.unique_) {\n this.assertUnique_(elem, index);\n }\n const prev = this.array_[index];\n this.array_[index] = elem;\n this.dispatchEvent(\n /** @type {CollectionEvent} */ (\n new CollectionEvent(CollectionEventType.REMOVE, prev, index)\n ),\n );\n this.dispatchEvent(\n /** @type {CollectionEvent} */ (\n new CollectionEvent(CollectionEventType.ADD, elem, index)\n ),\n );\n }\n\n /**\n * @private\n */\n updateLength_() {\n this.set(Property.LENGTH, this.array_.length);\n }\n\n /**\n * @private\n * @param {T} elem Element.\n * @param {number} [except] Optional index to ignore.\n */\n assertUnique_(elem, except) {\n const array = this.array_;\n for (let i = 0, ii = array.length; i < ii; ++i) {\n if (array[i] === elem && i !== except) {\n throw new Error('Duplicate item added to a unique collection');\n }\n }\n }\n}\n\nexport default Collection;\n","/**\n * @module ol/asserts\n */\n\n/**\n * @param {*} assertion Assertion we expected to be truthy.\n * @param {string} errorMessage Error message.\n */\nexport function assert(assertion, errorMessage) {\n if (!assertion) {\n throw new Error(errorMessage);\n }\n}\n","/**\n * @module ol/Feature\n */\nimport BaseObject from './Object.js';\nimport {assert} from './asserts.js';\nimport {listen, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\n\n/**\n * @typedef {typeof Feature|typeof import(\"./render/Feature.js\").default} FeatureClass\n */\n\n/**\n * @typedef {Feature|import(\"./render/Feature.js\").default} FeatureLike\n */\n\n/***\n * @template Return\n * @typedef {import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").OnSignature &\n * import(\"./Observable.js\").CombinedOnSignature} FeatureOnSignature\n */\n\n/***\n * @template {import(\"./geom/Geometry.js\").default} [Geometry=import(\"./geom/Geometry.js\").default]\n * @template {Object} [Properties=Object]\n * @typedef {Properties & { geometry?: Geometry }} ObjectWithGeometry\n */\n\n/**\n * @classdesc\n * A vector object for geographic features with a geometry and other\n * attribute properties, similar to the features in vector file formats like\n * GeoJSON.\n *\n * Features can be styled individually with `setStyle`; otherwise they use the\n * style of their vector layer.\n *\n * Note that attribute properties are set as {@link module:ol/Object~BaseObject} properties on\n * the feature object, so they are observable, and have get/set accessors.\n *\n * Typically, a feature has a single geometry property. You can set the\n * geometry using the `setGeometry` method and get it with `getGeometry`.\n * It is possible to store more than one geometry on a feature using attribute\n * properties. By default, the geometry used for rendering is identified by\n * the property name `geometry`. If you want to use another geometry property\n * for rendering, use the `setGeometryName` method to change the attribute\n * property associated with the geometry for the feature. For example:\n *\n * ```js\n *\n * import Feature from 'ol/Feature.js';\n * import Polygon from 'ol/geom/Polygon.js';\n * import Point from 'ol/geom/Point.js';\n *\n * const feature = new Feature({\n * geometry: new Polygon(polyCoords),\n * labelPoint: new Point(labelCoords),\n * name: 'My Polygon',\n * });\n *\n * // get the polygon geometry\n * const poly = feature.getGeometry();\n *\n * // Render the feature as a point using the coordinates from labelPoint\n * feature.setGeometryName('labelPoint');\n *\n * // get the point geometry\n * const point = feature.getGeometry();\n * ```\n *\n * @api\n * @template {import(\"./geom/Geometry.js\").default} [Geometry=import(\"./geom/Geometry.js\").default]\n * @template {Object} [Properties=Object]\n * @extends {BaseObject>}\n */\nclass Feature extends BaseObject {\n /**\n * @param {Geometry|ObjectWithGeometry>} [geometryOrProperties]\n * You may pass a Geometry object directly, or an object literal containing\n * properties. If you pass an object literal, you may include a Geometry\n * associated with a `geometry` key.\n */\n constructor(geometryOrProperties) {\n super();\n\n /***\n * @type {FeatureOnSignature}\n */\n this.on;\n\n /***\n * @type {FeatureOnSignature}\n */\n this.once;\n\n /***\n * @type {FeatureOnSignature}\n */\n this.un;\n\n /**\n * @private\n * @type {number|string|undefined}\n */\n this.id_ = undefined;\n\n /**\n * @type {string}\n * @private\n */\n this.geometryName_ = 'geometry';\n\n /**\n * User provided style.\n * @private\n * @type {import(\"./style/Style.js\").StyleLike}\n */\n this.style_ = null;\n\n /**\n * @private\n * @type {import(\"./style/Style.js\").StyleFunction|undefined}\n */\n this.styleFunction_ = undefined;\n\n /**\n * @private\n * @type {?import(\"./events.js\").EventsKey}\n */\n this.geometryChangeKey_ = null;\n\n this.addChangeListener(this.geometryName_, this.handleGeometryChanged_);\n\n if (geometryOrProperties) {\n if (\n typeof (\n /** @type {?} */ (geometryOrProperties).getSimplifiedGeometry\n ) === 'function'\n ) {\n const geometry = /** @type {Geometry} */ (geometryOrProperties);\n this.setGeometry(geometry);\n } else {\n /** @type {?} */\n const properties = geometryOrProperties;\n this.setProperties(properties);\n }\n }\n }\n\n /**\n * Clone this feature. If the original feature has a geometry it\n * is also cloned. The feature id is not set in the clone.\n * @return {Feature} The clone.\n * @api\n */\n clone() {\n const clone = /** @type {Feature} */ (new Feature());\n const geometryName = this.geometryName_;\n clone.setGeometryName(geometryName);\n\n const properties = this.getPropertiesInternal();\n if (properties) {\n const geometry = this.getGeometry();\n for (const key in properties) {\n if (key === geometryName && geometry) {\n clone.set(key, geometry.clone());\n } else {\n clone.set(key, properties[key], true);\n }\n }\n }\n\n const style = this.getStyle();\n if (style) {\n clone.setStyle(style);\n }\n return clone;\n }\n\n /**\n * Get the feature's default geometry. A feature may have any number of named\n * geometries. The \"default\" geometry (the one that is rendered by default) is\n * set when calling {@link module:ol/Feature~Feature#setGeometry}.\n * @return {Geometry|undefined} The default geometry for the feature.\n * @api\n * @observable\n */\n getGeometry() {\n return /** @type {Geometry|undefined} */ (this.get(this.geometryName_));\n }\n\n /**\n * Get the feature identifier. This is a stable identifier for the feature and\n * is either set when reading data from a remote source or set explicitly by\n * calling {@link module:ol/Feature~Feature#setId}.\n * @return {number|string|undefined} Id.\n * @api\n */\n getId() {\n return this.id_;\n }\n\n /**\n * Get the name of the feature's default geometry. By default, the default\n * geometry is named `geometry`.\n * @return {string} Get the property name associated with the default geometry\n * for this feature.\n * @api\n */\n getGeometryName() {\n return this.geometryName_;\n }\n\n /**\n * Get the feature's style. Will return what was provided to the\n * {@link module:ol/Feature~Feature#setStyle} method.\n * @return {import(\"./style/Style.js\").StyleLike|undefined} The feature style.\n * @api\n */\n getStyle() {\n return this.style_;\n }\n\n /**\n * Get the feature's style function.\n * @return {import(\"./style/Style.js\").StyleFunction|undefined} Return a function\n * representing the current style of this feature.\n * @api\n */\n getStyleFunction() {\n return this.styleFunction_;\n }\n\n /**\n * @private\n */\n handleGeometryChange_() {\n this.changed();\n }\n\n /**\n * @private\n */\n handleGeometryChanged_() {\n if (this.geometryChangeKey_) {\n unlistenByKey(this.geometryChangeKey_);\n this.geometryChangeKey_ = null;\n }\n const geometry = this.getGeometry();\n if (geometry) {\n this.geometryChangeKey_ = listen(\n geometry,\n EventType.CHANGE,\n this.handleGeometryChange_,\n this,\n );\n }\n this.changed();\n }\n\n /**\n * Set the default geometry for the feature. This will update the property\n * with the name returned by {@link module:ol/Feature~Feature#getGeometryName}.\n * @param {Geometry|undefined} geometry The new geometry.\n * @api\n * @observable\n */\n setGeometry(geometry) {\n this.set(this.geometryName_, geometry);\n }\n\n /**\n * Set the style for the feature to override the layer style. This can be a\n * single style object, an array of styles, or a function that takes a\n * resolution and returns an array of styles. To unset the feature style, call\n * `setStyle()` without arguments or a falsey value.\n * @param {import(\"./style/Style.js\").StyleLike} [style] Style for this feature.\n * @api\n * @fires module:ol/events/Event~BaseEvent#event:change\n */\n setStyle(style) {\n this.style_ = style;\n this.styleFunction_ = !style ? undefined : createStyleFunction(style);\n this.changed();\n }\n\n /**\n * Set the feature id. The feature id is considered stable and may be used when\n * requesting features or comparing identifiers returned from a remote source.\n * The feature id can be used with the\n * {@link module:ol/source/Vector~VectorSource#getFeatureById} method.\n * @param {number|string|undefined} id The feature id.\n * @api\n * @fires module:ol/events/Event~BaseEvent#event:change\n */\n setId(id) {\n this.id_ = id;\n this.changed();\n }\n\n /**\n * Set the property name to be used when getting the feature's default geometry.\n * When calling {@link module:ol/Feature~Feature#getGeometry}, the value of the property with\n * this name will be returned.\n * @param {string} name The property name of the default geometry.\n * @api\n */\n setGeometryName(name) {\n if (name === this.geometryName_) {\n return;\n }\n this.removeChangeListener(this.geometryName_, this.handleGeometryChanged_);\n this.geometryName_ = name;\n this.addChangeListener(this.geometryName_, this.handleGeometryChanged_);\n this.handleGeometryChanged_();\n }\n}\n\n/**\n * Convert the provided object into a feature style function. Functions passed\n * through unchanged. Arrays of Style or single style objects wrapped\n * in a new feature style function.\n * @param {!import(\"./style/Style.js\").StyleFunction|!Array|!import(\"./style/Style.js\").default} obj\n * A feature style function, a single style, or an array of styles.\n * @return {import(\"./style/Style.js\").StyleFunction} A style function.\n */\nexport function createStyleFunction(obj) {\n if (typeof obj === 'function') {\n return obj;\n }\n /**\n * @type {Array}\n */\n let styles;\n if (Array.isArray(obj)) {\n styles = obj;\n } else {\n assert(\n typeof (/** @type {?} */ (obj).getZIndex) === 'function',\n 'Expected an `ol/style/Style` or an array of `ol/style/Style.js`',\n );\n const style = /** @type {import(\"./style/Style.js\").default} */ (obj);\n styles = [style];\n }\n return function () {\n return styles;\n };\n}\nexport default Feature;\n","/**\n * @module ol/extent/Relationship\n */\n\n/**\n * Relationship to an extent.\n * @enum {number}\n */\nexport default {\n UNKNOWN: 0,\n INTERSECTING: 1,\n ABOVE: 2,\n RIGHT: 4,\n BELOW: 8,\n LEFT: 16,\n};\n","/**\n * @module ol/extent\n */\nimport Relationship from './extent/Relationship.js';\n\n/**\n * An array of numbers representing an extent: `[minx, miny, maxx, maxy]`.\n * @typedef {Array} Extent\n * @api\n */\n\n/**\n * Extent corner.\n * @typedef {'bottom-left' | 'bottom-right' | 'top-left' | 'top-right'} Corner\n */\n\n/**\n * Build an extent that includes all given coordinates.\n *\n * @param {Array} coordinates Coordinates.\n * @return {Extent} Bounding extent.\n * @api\n */\nexport function boundingExtent(coordinates) {\n const extent = createEmpty();\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n extendCoordinate(extent, coordinates[i]);\n }\n return extent;\n}\n\n/**\n * @param {Array} xs Xs.\n * @param {Array} ys Ys.\n * @param {Extent} [dest] Destination extent.\n * @private\n * @return {Extent} Extent.\n */\nfunction _boundingExtentXYs(xs, ys, dest) {\n const minX = Math.min.apply(null, xs);\n const minY = Math.min.apply(null, ys);\n const maxX = Math.max.apply(null, xs);\n const maxY = Math.max.apply(null, ys);\n return createOrUpdate(minX, minY, maxX, maxY, dest);\n}\n\n/**\n * Return extent increased by the provided value.\n * @param {Extent} extent Extent.\n * @param {number} value The amount by which the extent should be buffered.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n * @api\n */\nexport function buffer(extent, value, dest) {\n if (dest) {\n dest[0] = extent[0] - value;\n dest[1] = extent[1] - value;\n dest[2] = extent[2] + value;\n dest[3] = extent[3] + value;\n return dest;\n }\n return [\n extent[0] - value,\n extent[1] - value,\n extent[2] + value,\n extent[3] + value,\n ];\n}\n\n/**\n * Creates a clone of an extent.\n *\n * @param {Extent} extent Extent to clone.\n * @param {Extent} [dest] Extent.\n * @return {Extent} The clone.\n */\nexport function clone(extent, dest) {\n if (dest) {\n dest[0] = extent[0];\n dest[1] = extent[1];\n dest[2] = extent[2];\n dest[3] = extent[3];\n return dest;\n }\n return extent.slice();\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {number} Closest squared distance.\n */\nexport function closestSquaredDistanceXY(extent, x, y) {\n let dx, dy;\n if (x < extent[0]) {\n dx = extent[0] - x;\n } else if (extent[2] < x) {\n dx = x - extent[2];\n } else {\n dx = 0;\n }\n if (y < extent[1]) {\n dy = extent[1] - y;\n } else if (extent[3] < y) {\n dy = y - extent[3];\n } else {\n dy = 0;\n }\n return dx * dx + dy * dy;\n}\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} The coordinate is contained in the extent.\n * @api\n */\nexport function containsCoordinate(extent, coordinate) {\n return containsXY(extent, coordinate[0], coordinate[1]);\n}\n\n/**\n * Check if one extent contains another.\n *\n * An extent is deemed contained if it lies completely within the other extent,\n * including if they share one or more edges.\n *\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The second extent is contained by or on the edge of the\n * first.\n * @api\n */\nexport function containsExtent(extent1, extent2) {\n return (\n extent1[0] <= extent2[0] &&\n extent2[2] <= extent1[2] &&\n extent1[1] <= extent2[1] &&\n extent2[3] <= extent1[3]\n );\n}\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {number} x X coordinate.\n * @param {number} y Y coordinate.\n * @return {boolean} The x, y values are contained in the extent.\n * @api\n */\nexport function containsXY(extent, x, y) {\n return extent[0] <= x && x <= extent[2] && extent[1] <= y && y <= extent[3];\n}\n\n/**\n * Get the relationship between a coordinate and extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate The coordinate.\n * @return {import(\"./extent/Relationship.js\").default} The relationship (bitwise compare with\n * import(\"./extent/Relationship.js\").Relationship).\n */\nexport function coordinateRelationship(extent, coordinate) {\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const x = coordinate[0];\n const y = coordinate[1];\n let relationship = Relationship.UNKNOWN;\n if (x < minX) {\n relationship = relationship | Relationship.LEFT;\n } else if (x > maxX) {\n relationship = relationship | Relationship.RIGHT;\n }\n if (y < minY) {\n relationship = relationship | Relationship.BELOW;\n } else if (y > maxY) {\n relationship = relationship | Relationship.ABOVE;\n }\n if (relationship === Relationship.UNKNOWN) {\n relationship = Relationship.INTERSECTING;\n }\n return relationship;\n}\n\n/**\n * Create an empty extent.\n * @return {Extent} Empty extent.\n * @api\n */\nexport function createEmpty() {\n return [Infinity, Infinity, -Infinity, -Infinity];\n}\n\n/**\n * Create a new extent or update the provided extent.\n * @param {number} minX Minimum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxX Maximum X.\n * @param {number} maxY Maximum Y.\n * @param {Extent} [dest] Destination extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdate(minX, minY, maxX, maxY, dest) {\n if (dest) {\n dest[0] = minX;\n dest[1] = minY;\n dest[2] = maxX;\n dest[3] = maxY;\n return dest;\n }\n return [minX, minY, maxX, maxY];\n}\n\n/**\n * Create a new empty extent or make the provided one empty.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateEmpty(dest) {\n return createOrUpdate(Infinity, Infinity, -Infinity, -Infinity, dest);\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinate(coordinate, dest) {\n const x = coordinate[0];\n const y = coordinate[1];\n return createOrUpdate(x, y, x, y, dest);\n}\n\n/**\n * @param {Array} coordinates Coordinates.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinates(coordinates, dest) {\n const extent = createOrUpdateEmpty(dest);\n return extendCoordinates(extent, coordinates);\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromFlatCoordinates(\n flatCoordinates,\n offset,\n end,\n stride,\n dest,\n) {\n const extent = createOrUpdateEmpty(dest);\n return extendFlatCoordinates(extent, flatCoordinates, offset, end, stride);\n}\n\n/**\n * @param {Array>} rings Rings.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromRings(rings, dest) {\n const extent = createOrUpdateEmpty(dest);\n return extendRings(extent, rings);\n}\n\n/**\n * Determine if two extents are equivalent.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The two extents are equivalent.\n * @api\n */\nexport function equals(extent1, extent2) {\n return (\n extent1[0] == extent2[0] &&\n extent1[2] == extent2[2] &&\n extent1[1] == extent2[1] &&\n extent1[3] == extent2[3]\n );\n}\n\n/**\n * Determine if two extents are approximately equivalent.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @param {number} tolerance Tolerance in extent coordinate units.\n * @return {boolean} The two extents differ by less than the tolerance.\n */\nexport function approximatelyEquals(extent1, extent2, tolerance) {\n return (\n Math.abs(extent1[0] - extent2[0]) < tolerance &&\n Math.abs(extent1[2] - extent2[2]) < tolerance &&\n Math.abs(extent1[1] - extent2[1]) < tolerance &&\n Math.abs(extent1[3] - extent2[3]) < tolerance\n );\n}\n\n/**\n * Modify an extent to include another extent.\n * @param {Extent} extent1 The extent to be modified.\n * @param {Extent} extent2 The extent that will be included in the first.\n * @return {Extent} A reference to the first (extended) extent.\n * @api\n */\nexport function extend(extent1, extent2) {\n if (extent2[0] < extent1[0]) {\n extent1[0] = extent2[0];\n }\n if (extent2[2] > extent1[2]) {\n extent1[2] = extent2[2];\n }\n if (extent2[1] < extent1[1]) {\n extent1[1] = extent2[1];\n }\n if (extent2[3] > extent1[3]) {\n extent1[3] = extent2[3];\n }\n return extent1;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n */\nexport function extendCoordinate(extent, coordinate) {\n if (coordinate[0] < extent[0]) {\n extent[0] = coordinate[0];\n }\n if (coordinate[0] > extent[2]) {\n extent[2] = coordinate[0];\n }\n if (coordinate[1] < extent[1]) {\n extent[1] = coordinate[1];\n }\n if (coordinate[1] > extent[3]) {\n extent[3] = coordinate[1];\n }\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array} coordinates Coordinates.\n * @return {Extent} Extent.\n */\nexport function extendCoordinates(extent, coordinates) {\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n extendCoordinate(extent, coordinates[i]);\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {Extent} Extent.\n */\nexport function extendFlatCoordinates(\n extent,\n flatCoordinates,\n offset,\n end,\n stride,\n) {\n for (; offset < end; offset += stride) {\n extendXY(extent, flatCoordinates[offset], flatCoordinates[offset + 1]);\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array>} rings Rings.\n * @return {Extent} Extent.\n */\nexport function extendRings(extent, rings) {\n for (let i = 0, ii = rings.length; i < ii; ++i) {\n extendCoordinates(extent, rings[i]);\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n */\nexport function extendXY(extent, x, y) {\n extent[0] = Math.min(extent[0], x);\n extent[1] = Math.min(extent[1], y);\n extent[2] = Math.max(extent[2], x);\n extent[3] = Math.max(extent[3], y);\n}\n\n/**\n * This function calls `callback` for each corner of the extent. If the\n * callback returns a truthy value the function returns that value\n * immediately. Otherwise the function returns `false`.\n * @param {Extent} extent Extent.\n * @param {function(import(\"./coordinate.js\").Coordinate): S} callback Callback.\n * @return {S|boolean} Value.\n * @template S\n */\nexport function forEachCorner(extent, callback) {\n let val;\n val = callback(getBottomLeft(extent));\n if (val) {\n return val;\n }\n val = callback(getBottomRight(extent));\n if (val) {\n return val;\n }\n val = callback(getTopRight(extent));\n if (val) {\n return val;\n }\n val = callback(getTopLeft(extent));\n if (val) {\n return val;\n }\n return false;\n}\n\n/**\n * Get the size of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Area.\n * @api\n */\nexport function getArea(extent) {\n let area = 0;\n if (!isEmpty(extent)) {\n area = getWidth(extent) * getHeight(extent);\n }\n return area;\n}\n\n/**\n * Get the bottom left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom left coordinate.\n * @api\n */\nexport function getBottomLeft(extent) {\n return [extent[0], extent[1]];\n}\n\n/**\n * Get the bottom right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom right coordinate.\n * @api\n */\nexport function getBottomRight(extent) {\n return [extent[2], extent[1]];\n}\n\n/**\n * Get the center coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Center.\n * @api\n */\nexport function getCenter(extent) {\n return [(extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2];\n}\n\n/**\n * Get a corner coordinate of an extent.\n * @param {Extent} extent Extent.\n * @param {Corner} corner Corner.\n * @return {import(\"./coordinate.js\").Coordinate} Corner coordinate.\n */\nexport function getCorner(extent, corner) {\n let coordinate;\n if (corner === 'bottom-left') {\n coordinate = getBottomLeft(extent);\n } else if (corner === 'bottom-right') {\n coordinate = getBottomRight(extent);\n } else if (corner === 'top-left') {\n coordinate = getTopLeft(extent);\n } else if (corner === 'top-right') {\n coordinate = getTopRight(extent);\n } else {\n throw new Error('Invalid corner');\n }\n return coordinate;\n}\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Enlarged area.\n */\nexport function getEnlargedArea(extent1, extent2) {\n const minX = Math.min(extent1[0], extent2[0]);\n const minY = Math.min(extent1[1], extent2[1]);\n const maxX = Math.max(extent1[2], extent2[2]);\n const maxY = Math.max(extent1[3], extent2[3]);\n return (maxX - minX) * (maxY - minY);\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {import(\"./size.js\").Size} size Size.\n * @param {Extent} [dest] Destination extent.\n * @return {Extent} Extent.\n */\nexport function getForViewAndSize(center, resolution, rotation, size, dest) {\n const [x0, y0, x1, y1, x2, y2, x3, y3] = getRotatedViewport(\n center,\n resolution,\n rotation,\n size,\n );\n return createOrUpdate(\n Math.min(x0, x1, x2, x3),\n Math.min(y0, y1, y2, y3),\n Math.max(x0, x1, x2, x3),\n Math.max(y0, y1, y2, y3),\n dest,\n );\n}\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {import(\"./size.js\").Size} size Size.\n * @return {Array} Linear ring representing the viewport.\n */\nexport function getRotatedViewport(center, resolution, rotation, size) {\n const dx = (resolution * size[0]) / 2;\n const dy = (resolution * size[1]) / 2;\n const cosRotation = Math.cos(rotation);\n const sinRotation = Math.sin(rotation);\n const xCos = dx * cosRotation;\n const xSin = dx * sinRotation;\n const yCos = dy * cosRotation;\n const ySin = dy * sinRotation;\n const x = center[0];\n const y = center[1];\n return [\n x - xCos + ySin,\n y - xSin - yCos,\n x - xCos - ySin,\n y - xSin + yCos,\n x + xCos - ySin,\n y + xSin + yCos,\n x + xCos + ySin,\n y + xSin - yCos,\n x - xCos + ySin,\n y - xSin - yCos,\n ];\n}\n\n/**\n * Get the height of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Height.\n * @api\n */\nexport function getHeight(extent) {\n return extent[3] - extent[1];\n}\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Intersection area.\n */\nexport function getIntersectionArea(extent1, extent2) {\n const intersection = getIntersection(extent1, extent2);\n return getArea(intersection);\n}\n\n/**\n * Get the intersection of two extents.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @param {Extent} [dest] Optional extent to populate with intersection.\n * @return {Extent} Intersecting extent.\n * @api\n */\nexport function getIntersection(extent1, extent2, dest) {\n const intersection = dest ? dest : createEmpty();\n if (intersects(extent1, extent2)) {\n if (extent1[0] > extent2[0]) {\n intersection[0] = extent1[0];\n } else {\n intersection[0] = extent2[0];\n }\n if (extent1[1] > extent2[1]) {\n intersection[1] = extent1[1];\n } else {\n intersection[1] = extent2[1];\n }\n if (extent1[2] < extent2[2]) {\n intersection[2] = extent1[2];\n } else {\n intersection[2] = extent2[2];\n }\n if (extent1[3] < extent2[3]) {\n intersection[3] = extent1[3];\n } else {\n intersection[3] = extent2[3];\n }\n } else {\n createOrUpdateEmpty(intersection);\n }\n return intersection;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @return {number} Margin.\n */\nexport function getMargin(extent) {\n return getWidth(extent) + getHeight(extent);\n}\n\n/**\n * Get the size (width, height) of an extent.\n * @param {Extent} extent The extent.\n * @return {import(\"./size.js\").Size} The extent size.\n * @api\n */\nexport function getSize(extent) {\n return [extent[2] - extent[0], extent[3] - extent[1]];\n}\n\n/**\n * Get the top left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top left coordinate.\n * @api\n */\nexport function getTopLeft(extent) {\n return [extent[0], extent[3]];\n}\n\n/**\n * Get the top right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top right coordinate.\n * @api\n */\nexport function getTopRight(extent) {\n return [extent[2], extent[3]];\n}\n\n/**\n * Get the width of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Width.\n * @api\n */\nexport function getWidth(extent) {\n return extent[2] - extent[0];\n}\n\n/**\n * Determine if one extent intersects another.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent.\n * @return {boolean} The two extents intersect.\n * @api\n */\nexport function intersects(extent1, extent2) {\n return (\n extent1[0] <= extent2[2] &&\n extent1[2] >= extent2[0] &&\n extent1[1] <= extent2[3] &&\n extent1[3] >= extent2[1]\n );\n}\n\n/**\n * Determine if an extent is empty.\n * @param {Extent} extent Extent.\n * @return {boolean} Is empty.\n * @api\n */\nexport function isEmpty(extent) {\n return extent[2] < extent[0] || extent[3] < extent[1];\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {Extent} [dest] Extent.\n * @return {Extent} Extent.\n */\nexport function returnOrUpdate(extent, dest) {\n if (dest) {\n dest[0] = extent[0];\n dest[1] = extent[1];\n dest[2] = extent[2];\n dest[3] = extent[3];\n return dest;\n }\n return extent;\n}\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} value Value.\n */\nexport function scaleFromCenter(extent, value) {\n const deltaX = ((extent[2] - extent[0]) / 2) * (value - 1);\n const deltaY = ((extent[3] - extent[1]) / 2) * (value - 1);\n extent[0] -= deltaX;\n extent[2] += deltaX;\n extent[1] -= deltaY;\n extent[3] += deltaY;\n}\n\n/**\n * Determine if the segment between two coordinates intersects (crosses,\n * touches, or is contained by) the provided extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} start Segment start coordinate.\n * @param {import(\"./coordinate.js\").Coordinate} end Segment end coordinate.\n * @return {boolean} The segment intersects the extent.\n */\nexport function intersectsSegment(extent, start, end) {\n let intersects = false;\n const startRel = coordinateRelationship(extent, start);\n const endRel = coordinateRelationship(extent, end);\n if (\n startRel === Relationship.INTERSECTING ||\n endRel === Relationship.INTERSECTING\n ) {\n intersects = true;\n } else {\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const startX = start[0];\n const startY = start[1];\n const endX = end[0];\n const endY = end[1];\n const slope = (endY - startY) / (endX - startX);\n let x, y;\n if (!!(endRel & Relationship.ABOVE) && !(startRel & Relationship.ABOVE)) {\n // potentially intersects top\n x = endX - (endY - maxY) / slope;\n intersects = x >= minX && x <= maxX;\n }\n if (\n !intersects &&\n !!(endRel & Relationship.RIGHT) &&\n !(startRel & Relationship.RIGHT)\n ) {\n // potentially intersects right\n y = endY - (endX - maxX) * slope;\n intersects = y >= minY && y <= maxY;\n }\n if (\n !intersects &&\n !!(endRel & Relationship.BELOW) &&\n !(startRel & Relationship.BELOW)\n ) {\n // potentially intersects bottom\n x = endX - (endY - minY) / slope;\n intersects = x >= minX && x <= maxX;\n }\n if (\n !intersects &&\n !!(endRel & Relationship.LEFT) &&\n !(startRel & Relationship.LEFT)\n ) {\n // potentially intersects left\n y = endY - (endX - minX) * slope;\n intersects = y >= minY && y <= maxY;\n }\n }\n return intersects;\n}\n\n/**\n * Apply a transform function to the extent.\n * @param {Extent} extent Extent.\n * @param {import(\"./proj.js\").TransformFunction} transformFn Transform function.\n * Called with `[minX, minY, maxX, maxY]` extent coordinates.\n * @param {Extent} [dest] Destination extent.\n * @param {number} [stops] Number of stops per side used for the transform.\n * By default only the corners are used.\n * @return {Extent} Extent.\n * @api\n */\nexport function applyTransform(extent, transformFn, dest, stops) {\n if (isEmpty(extent)) {\n return createOrUpdateEmpty(dest);\n }\n let coordinates = [];\n if (stops > 1) {\n const width = extent[2] - extent[0];\n const height = extent[3] - extent[1];\n for (let i = 0; i < stops; ++i) {\n coordinates.push(\n extent[0] + (width * i) / stops,\n extent[1],\n extent[2],\n extent[1] + (height * i) / stops,\n extent[2] - (width * i) / stops,\n extent[3],\n extent[0],\n extent[3] - (height * i) / stops,\n );\n }\n } else {\n coordinates = [\n extent[0],\n extent[1],\n extent[2],\n extent[1],\n extent[2],\n extent[3],\n extent[0],\n extent[3],\n ];\n }\n transformFn(coordinates, coordinates, 2);\n const xs = [];\n const ys = [];\n for (let i = 0, l = coordinates.length; i < l; i += 2) {\n xs.push(coordinates[i]);\n ys.push(coordinates[i + 1]);\n }\n return _boundingExtentXYs(xs, ys, dest);\n}\n\n/**\n * Modifies the provided extent in-place to be within the real world\n * extent.\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./proj/Projection.js\").default} projection Projection\n * @return {Extent} The extent within the real world extent.\n */\nexport function wrapX(extent, projection) {\n const projectionExtent = projection.getExtent();\n const center = getCenter(extent);\n if (\n projection.canWrapX() &&\n (center[0] < projectionExtent[0] || center[0] >= projectionExtent[2])\n ) {\n const worldWidth = getWidth(projectionExtent);\n const worldsAway = Math.floor(\n (center[0] - projectionExtent[0]) / worldWidth,\n );\n const offset = worldsAway * worldWidth;\n extent[0] -= offset;\n extent[2] -= offset;\n }\n return extent;\n}\n\n/**\n * Fits the extent to the real world\n *\n * If the extent does not cross the anti meridian, this will return the extent in an array\n * If the extent crosses the anti meridian, the extent will be sliced, so each part fits within the\n * real world\n *\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./proj/Projection.js\").default} projection Projection\n * @param {boolean} [multiWorld] Return all worlds\n * @return {Array} The extent within the real world extent.\n */\nexport function wrapAndSliceX(extent, projection, multiWorld) {\n if (projection.canWrapX()) {\n const projectionExtent = projection.getExtent();\n\n if (!isFinite(extent[0]) || !isFinite(extent[2])) {\n return [[projectionExtent[0], extent[1], projectionExtent[2], extent[3]]];\n }\n\n wrapX(extent, projection);\n const worldWidth = getWidth(projectionExtent);\n\n if (getWidth(extent) > worldWidth && !multiWorld) {\n // the extent wraps around on itself\n return [[projectionExtent[0], extent[1], projectionExtent[2], extent[3]]];\n }\n if (extent[0] < projectionExtent[0]) {\n // the extent crosses the anti meridian, so it needs to be sliced\n return [\n [extent[0] + worldWidth, extent[1], projectionExtent[2], extent[3]],\n [projectionExtent[0], extent[1], extent[2], extent[3]],\n ];\n }\n if (extent[2] > projectionExtent[2]) {\n // the extent crosses the anti meridian, so it needs to be sliced\n return [\n [extent[0], extent[1], projectionExtent[2], extent[3]],\n [projectionExtent[0], extent[1], extent[2] - worldWidth, extent[3]],\n ];\n }\n }\n\n return [extent];\n}\n","/**\n * @module ol/math\n */\n\n/**\n * Takes a number and clamps it to within the provided bounds.\n * @param {number} value The input number.\n * @param {number} min The minimum value to return.\n * @param {number} max The maximum value to return.\n * @return {number} The input number if it is within bounds, or the nearest\n * number within the bounds.\n */\nexport function clamp(value, min, max) {\n return Math.min(Math.max(value, min), max);\n}\n\n/**\n * Returns the square of the closest distance between the point (x, y) and the\n * line segment (x1, y1) to (x2, y2).\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredSegmentDistance(x, y, x1, y1, x2, y2) {\n const dx = x2 - x1;\n const dy = y2 - y1;\n if (dx !== 0 || dy !== 0) {\n const t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n if (t > 1) {\n x1 = x2;\n y1 = y2;\n } else if (t > 0) {\n x1 += dx * t;\n y1 += dy * t;\n }\n }\n return squaredDistance(x, y, x1, y1);\n}\n\n/**\n * Returns the square of the distance between the points (x1, y1) and (x2, y2).\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredDistance(x1, y1, x2, y2) {\n const dx = x2 - x1;\n const dy = y2 - y1;\n return dx * dx + dy * dy;\n}\n\n/**\n * Solves system of linear equations using Gaussian elimination method.\n *\n * @param {Array>} mat Augmented matrix (n x n + 1 column)\n * in row-major order.\n * @return {Array|null} The resulting vector.\n */\nexport function solveLinearSystem(mat) {\n const n = mat.length;\n\n for (let i = 0; i < n; i++) {\n // Find max in the i-th column (ignoring i - 1 first rows)\n let maxRow = i;\n let maxEl = Math.abs(mat[i][i]);\n for (let r = i + 1; r < n; r++) {\n const absValue = Math.abs(mat[r][i]);\n if (absValue > maxEl) {\n maxEl = absValue;\n maxRow = r;\n }\n }\n\n if (maxEl === 0) {\n return null; // matrix is singular\n }\n\n // Swap max row with i-th (current) row\n const tmp = mat[maxRow];\n mat[maxRow] = mat[i];\n mat[i] = tmp;\n\n // Subtract the i-th row to make all the remaining rows 0 in the i-th column\n for (let j = i + 1; j < n; j++) {\n const coef = -mat[j][i] / mat[i][i];\n for (let k = i; k < n + 1; k++) {\n if (i == k) {\n mat[j][k] = 0;\n } else {\n mat[j][k] += coef * mat[i][k];\n }\n }\n }\n }\n\n // Solve Ax=b for upper triangular matrix A (mat)\n const x = new Array(n);\n for (let l = n - 1; l >= 0; l--) {\n x[l] = mat[l][n] / mat[l][l];\n for (let m = l - 1; m >= 0; m--) {\n mat[m][n] -= mat[m][l] * x[l];\n }\n }\n return x;\n}\n\n/**\n * Converts radians to to degrees.\n *\n * @param {number} angleInRadians Angle in radians.\n * @return {number} Angle in degrees.\n */\nexport function toDegrees(angleInRadians) {\n return (angleInRadians * 180) / Math.PI;\n}\n\n/**\n * Converts degrees to radians.\n *\n * @param {number} angleInDegrees Angle in degrees.\n * @return {number} Angle in radians.\n */\nexport function toRadians(angleInDegrees) {\n return (angleInDegrees * Math.PI) / 180;\n}\n\n/**\n * Returns the modulo of a / b, depending on the sign of b.\n *\n * @param {number} a Dividend.\n * @param {number} b Divisor.\n * @return {number} Modulo.\n */\nexport function modulo(a, b) {\n const r = a % b;\n return r * b < 0 ? r + b : r;\n}\n\n/**\n * Calculates the linearly interpolated value of x between a and b.\n *\n * @param {number} a Number\n * @param {number} b Number\n * @param {number} x Value to be interpolated.\n * @return {number} Interpolated value.\n */\nexport function lerp(a, b, x) {\n return a + x * (b - a);\n}\n\n/**\n * Returns a number with a limited number of decimal digits.\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The input number with a limited number of decimal digits.\n */\nexport function toFixed(n, decimals) {\n const factor = Math.pow(10, decimals);\n return Math.round(n * factor) / factor;\n}\n\n/**\n * Rounds a number to the nearest integer value considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The nearest integer.\n */\nexport function round(n, decimals) {\n return Math.round(toFixed(n, decimals));\n}\n\n/**\n * Rounds a number to the next smaller integer considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The next smaller integer.\n */\nexport function floor(n, decimals) {\n return Math.floor(toFixed(n, decimals));\n}\n\n/**\n * Rounds a number to the next bigger integer considering only the given number\n * of decimal digits (with rounding on the final digit).\n * @param {number} n The input number.\n * @param {number} decimals The maximum number of decimal digits.\n * @return {number} The next bigger integer.\n */\nexport function ceil(n, decimals) {\n return Math.ceil(toFixed(n, decimals));\n}\n\n/**\n * Wraps a number between some minimum and maximum values.\n * @param {number} n The number to wrap.\n * @param {number} min The minimum of the range (inclusive).\n * @param {number} max The maximum of the range (exclusive).\n * @return {number} The wrapped number.\n */\nexport function wrap(n, min, max) {\n if (n >= min && n < max) {\n return n;\n }\n const range = max - min;\n return ((((n - min) % range) + range) % range) + min;\n}\n","/**\n * @module ol/sphere\n */\nimport {toDegrees, toRadians} from './math.js';\n\n/**\n * Object literal with options for the {@link getLength} or {@link getArea}\n * functions.\n * @typedef {Object} SphereMetricOptions\n * @property {import(\"./proj.js\").ProjectionLike} [projection='EPSG:3857']\n * Projection of the geometry. By default, the geometry is assumed to be in\n * Web Mercator.\n * @property {number} [radius=6371008.8] Sphere radius. By default, the\n * [mean Earth radius](https://en.wikipedia.org/wiki/Earth_radius#Mean_radius)\n * for the WGS84 ellipsoid is used.\n */\n\n/**\n * The mean Earth radius (1/3 * (2a + b)) for the WGS84 ellipsoid.\n * https://en.wikipedia.org/wiki/Earth_radius#Mean_radius\n * @type {number}\n */\nexport const DEFAULT_RADIUS = 6371008.8;\n\n/**\n * Get the great circle distance (in meters) between two geographic coordinates.\n * @param {Array} c1 Starting coordinate.\n * @param {Array} c2 Ending coordinate.\n * @param {number} [radius] The sphere radius to use. Defaults to the Earth's\n * mean radius using the WGS84 ellipsoid.\n * @return {number} The great circle distance between the points (in meters).\n * @api\n */\nexport function getDistance(c1, c2, radius) {\n radius = radius || DEFAULT_RADIUS;\n const lat1 = toRadians(c1[1]);\n const lat2 = toRadians(c2[1]);\n const deltaLatBy2 = (lat2 - lat1) / 2;\n const deltaLonBy2 = toRadians(c2[0] - c1[0]) / 2;\n const a =\n Math.sin(deltaLatBy2) * Math.sin(deltaLatBy2) +\n Math.sin(deltaLonBy2) *\n Math.sin(deltaLonBy2) *\n Math.cos(lat1) *\n Math.cos(lat2);\n return 2 * radius * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));\n}\n\n/**\n * Get the cumulative great circle length of linestring coordinates (geographic).\n * @param {Array} coordinates Linestring coordinates.\n * @param {number} radius The sphere radius to use.\n * @return {number} The length (in meters).\n */\nfunction getLengthInternal(coordinates, radius) {\n let length = 0;\n for (let i = 0, ii = coordinates.length; i < ii - 1; ++i) {\n length += getDistance(coordinates[i], coordinates[i + 1], radius);\n }\n return length;\n}\n\n/**\n * Get the spherical length of a geometry. This length is the sum of the\n * great circle distances between coordinates. For polygons, the length is\n * the sum of all rings. For points, the length is zero. For multi-part\n * geometries, the length is the sum of the length of each part.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions} [options] Options for the\n * length calculation. By default, geometries are assumed to be in 'EPSG:3857'.\n * You can change this by providing a `projection` option.\n * @return {number} The spherical length (in meters).\n * @api\n */\nexport function getLength(geometry, options) {\n options = options || {};\n const radius = options.radius || DEFAULT_RADIUS;\n const projection = options.projection || 'EPSG:3857';\n const type = geometry.getType();\n if (type !== 'GeometryCollection') {\n geometry = geometry.clone().transform(projection, 'EPSG:4326');\n }\n let length = 0;\n let coordinates, coords, i, ii, j, jj;\n switch (type) {\n case 'Point':\n case 'MultiPoint': {\n break;\n }\n case 'LineString':\n case 'LinearRing': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n length = getLengthInternal(coordinates, radius);\n break;\n }\n case 'MultiLineString':\n case 'Polygon': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n length += getLengthInternal(coordinates[i], radius);\n }\n break;\n }\n case 'MultiPolygon': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n coords = coordinates[i];\n for (j = 0, jj = coords.length; j < jj; ++j) {\n length += getLengthInternal(coords[j], radius);\n }\n }\n break;\n }\n case 'GeometryCollection': {\n const geometries =\n /** @type {import(\"./geom/GeometryCollection.js\").default} */ (\n geometry\n ).getGeometries();\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n length += getLength(geometries[i], options);\n }\n break;\n }\n default: {\n throw new Error('Unsupported geometry type: ' + type);\n }\n }\n return length;\n}\n\n/**\n * Returns the spherical area for a list of coordinates.\n *\n * [Reference](https://trs.jpl.nasa.gov/handle/2014/40409)\n * Robert. G. Chamberlain and William H. Duquette, \"Some Algorithms for\n * Polygons on a Sphere\", JPL Publication 07-03, Jet Propulsion\n * Laboratory, Pasadena, CA, June 2007\n *\n * @param {Array} coordinates List of coordinates of a linear\n * ring. If the ring is oriented clockwise, the area will be positive,\n * otherwise it will be negative.\n * @param {number} radius The sphere radius.\n * @return {number} Area (in square meters).\n */\nfunction getAreaInternal(coordinates, radius) {\n let area = 0;\n const len = coordinates.length;\n let x1 = coordinates[len - 1][0];\n let y1 = coordinates[len - 1][1];\n for (let i = 0; i < len; i++) {\n const x2 = coordinates[i][0];\n const y2 = coordinates[i][1];\n area +=\n toRadians(x2 - x1) *\n (2 + Math.sin(toRadians(y1)) + Math.sin(toRadians(y2)));\n x1 = x2;\n y1 = y2;\n }\n return (area * radius * radius) / 2.0;\n}\n\n/**\n * Get the spherical area of a geometry. This is the area (in meters) assuming\n * that polygon edges are segments of great circles on a sphere.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions} [options] Options for the area\n * calculation. By default, geometries are assumed to be in 'EPSG:3857'.\n * You can change this by providing a `projection` option.\n * @return {number} The spherical area (in square meters).\n * @api\n */\nexport function getArea(geometry, options) {\n options = options || {};\n const radius = options.radius || DEFAULT_RADIUS;\n const projection = options.projection || 'EPSG:3857';\n const type = geometry.getType();\n if (type !== 'GeometryCollection') {\n geometry = geometry.clone().transform(projection, 'EPSG:4326');\n }\n let area = 0;\n let coordinates, coords, i, ii, j, jj;\n switch (type) {\n case 'Point':\n case 'MultiPoint':\n case 'LineString':\n case 'MultiLineString':\n case 'LinearRing': {\n break;\n }\n case 'Polygon': {\n coordinates = /** @type {import(\"./geom/Polygon.js\").default} */ (\n geometry\n ).getCoordinates();\n area = Math.abs(getAreaInternal(coordinates[0], radius));\n for (i = 1, ii = coordinates.length; i < ii; ++i) {\n area -= Math.abs(getAreaInternal(coordinates[i], radius));\n }\n break;\n }\n case 'MultiPolygon': {\n coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (\n geometry\n ).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n coords = coordinates[i];\n area += Math.abs(getAreaInternal(coords[0], radius));\n for (j = 1, jj = coords.length; j < jj; ++j) {\n area -= Math.abs(getAreaInternal(coords[j], radius));\n }\n }\n break;\n }\n case 'GeometryCollection': {\n const geometries =\n /** @type {import(\"./geom/GeometryCollection.js\").default} */ (\n geometry\n ).getGeometries();\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n area += getArea(geometries[i], options);\n }\n break;\n }\n default: {\n throw new Error('Unsupported geometry type: ' + type);\n }\n }\n return area;\n}\n\n/**\n * Returns the coordinate at the given distance and bearing from `c1`.\n *\n * @param {import(\"./coordinate.js\").Coordinate} c1 The origin point (`[lon, lat]` in degrees).\n * @param {number} distance The great-circle distance between the origin\n * point and the target point.\n * @param {number} bearing The bearing (in radians).\n * @param {number} [radius] The sphere radius to use. Defaults to the Earth's\n * mean radius using the WGS84 ellipsoid.\n * @return {import(\"./coordinate.js\").Coordinate} The target point.\n */\nexport function offset(c1, distance, bearing, radius) {\n radius = radius || DEFAULT_RADIUS;\n const lat1 = toRadians(c1[1]);\n const lon1 = toRadians(c1[0]);\n const dByR = distance / radius;\n const lat = Math.asin(\n Math.sin(lat1) * Math.cos(dByR) +\n Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing),\n );\n const lon =\n lon1 +\n Math.atan2(\n Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1),\n Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat),\n );\n return [toDegrees(lon), toDegrees(lat)];\n}\n","/**\n * @module ol/console\n */\n\n/**\n * @typedef {'info'|'warn'|'error'|'none'} Level\n */\n\n/**\n * @type {Object}\n */\nconst levels = {\n info: 1,\n warn: 2,\n error: 3,\n none: 4,\n};\n\n/**\n * @type {number}\n */\nlet level = levels.info;\n\n/**\n * Set the logging level. By default, the level is set to 'info' and all\n * messages will be logged. Set to 'warn' to only display warnings and errors.\n * Set to 'error' to only display errors. Set to 'none' to silence all messages.\n *\n * @param {Level} l The new level.\n */\nexport function setLevel(l) {\n level = levels[l];\n}\n\n/**\n * @param {...any} args Arguments to log\n */\nexport function log(...args) {\n if (level > levels.info) {\n return;\n }\n console.log(...args); // eslint-disable-line no-console\n}\n\n/**\n * @param {...any} args Arguments to log\n */\nexport function warn(...args) {\n if (level > levels.warn) {\n return;\n }\n console.warn(...args); // eslint-disable-line no-console\n}\n\n/**\n * @param {...any} args Arguments to log\n */\nexport function error(...args) {\n if (level > levels.error) {\n return;\n }\n console.error(...args); // eslint-disable-line no-console\n}\n","/**\n * @module ol/coordinate\n */\nimport {getWidth} from './extent.js';\nimport {clamp, modulo, toFixed} from './math.js';\nimport {padNumber} from './string.js';\n\n/**\n * An array of numbers representing an `xy`, `xyz` or `xyzm` coordinate.\n * Example: `[16, 48]`.\n * @typedef {Array} Coordinate\n * @api\n */\n\n/**\n * A function that takes a {@link module:ol/coordinate~Coordinate} and\n * transforms it into a `{string}`.\n *\n * @typedef {function((Coordinate|undefined)): string} CoordinateFormat\n * @api\n */\n\n/**\n * Add `delta` to `coordinate`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n * import {add} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * add(coord, [-2, 4]);\n * // coord is now [5.85, 51.983333]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {Coordinate} delta Delta.\n * @return {Coordinate} The input coordinate adjusted by\n * the given delta.\n * @api\n */\nexport function add(coordinate, delta) {\n coordinate[0] += +delta[0];\n coordinate[1] += +delta[1];\n return coordinate;\n}\n\n/**\n * Calculates the point closest to the passed coordinate on the passed circle.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {import(\"./geom/Circle.js\").default} circle The circle.\n * @return {Coordinate} Closest point on the circumference.\n */\nexport function closestOnCircle(coordinate, circle) {\n const r = circle.getRadius();\n const center = circle.getCenter();\n const x0 = center[0];\n const y0 = center[1];\n const x1 = coordinate[0];\n const y1 = coordinate[1];\n\n let dx = x1 - x0;\n const dy = y1 - y0;\n if (dx === 0 && dy === 0) {\n dx = 1;\n }\n const d = Math.sqrt(dx * dx + dy * dy);\n\n const x = x0 + (r * dx) / d;\n const y = y0 + (r * dy) / d;\n\n return [x, y];\n}\n\n/**\n * Calculates the point closest to the passed coordinate on the passed segment.\n * This is the foot of the perpendicular of the coordinate to the segment when\n * the foot is on the segment, or the closest segment coordinate when the foot\n * is outside the segment.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {Array} segment The two coordinates\n * of the segment.\n * @return {Coordinate} The foot of the perpendicular of\n * the coordinate to the segment.\n */\nexport function closestOnSegment(coordinate, segment) {\n const x0 = coordinate[0];\n const y0 = coordinate[1];\n const start = segment[0];\n const end = segment[1];\n const x1 = start[0];\n const y1 = start[1];\n const x2 = end[0];\n const y2 = end[1];\n const dx = x2 - x1;\n const dy = y2 - y1;\n const along =\n dx === 0 && dy === 0\n ? 0\n : (dx * (x0 - x1) + dy * (y0 - y1)) / (dx * dx + dy * dy || 0);\n let x, y;\n if (along <= 0) {\n x = x1;\n y = y1;\n } else if (along >= 1) {\n x = x2;\n y = y2;\n } else {\n x = x1 + along * dx;\n y = y1 + along * dy;\n }\n return [x, y];\n}\n\n/**\n * Returns a {@link module:ol/coordinate~CoordinateFormat} function that can be\n * used to format\n * a {Coordinate} to a string.\n *\n * Example without specifying the fractional digits:\n *\n * import {createStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const stringifyFunc = createStringXY();\n * const out = stringifyFunc(coord);\n * // out is now '8, 48'\n *\n * Example with explicitly specifying 2 fractional digits:\n *\n * import {createStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const stringifyFunc = createStringXY(2);\n * const out = stringifyFunc(coord);\n * // out is now '7.85, 47.98'\n *\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {CoordinateFormat} Coordinate format.\n * @api\n */\nexport function createStringXY(fractionDigits) {\n return (\n /**\n * @param {Coordinate} coordinate Coordinate.\n * @return {string} String XY.\n */\n function (coordinate) {\n return toStringXY(coordinate, fractionDigits);\n }\n );\n}\n\n/**\n * @param {string} hemispheres Hemispheres.\n * @param {number} degrees Degrees.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} String.\n */\nexport function degreesToStringHDMS(hemispheres, degrees, fractionDigits) {\n const normalizedDegrees = modulo(degrees + 180, 360) - 180;\n const x = Math.abs(3600 * normalizedDegrees);\n const decimals = fractionDigits || 0;\n\n let deg = Math.floor(x / 3600);\n let min = Math.floor((x - deg * 3600) / 60);\n let sec = toFixed(x - deg * 3600 - min * 60, decimals);\n\n if (sec >= 60) {\n sec = 0;\n min += 1;\n }\n\n if (min >= 60) {\n min = 0;\n deg += 1;\n }\n\n let hdms = deg + '\\u00b0';\n if (min !== 0 || sec !== 0) {\n hdms += ' ' + padNumber(min, 2) + '\\u2032';\n }\n if (sec !== 0) {\n hdms += ' ' + padNumber(sec, 2, decimals) + '\\u2033';\n }\n if (normalizedDegrees !== 0) {\n hdms += ' ' + hemispheres.charAt(normalizedDegrees < 0 ? 1 : 0);\n }\n\n return hdms;\n}\n\n/**\n * Transforms the given {@link module:ol/coordinate~Coordinate} to a string\n * using the given string template. The strings `{x}` and `{y}` in the template\n * will be replaced with the first and second coordinate values respectively.\n *\n * Example without specifying the fractional digits:\n *\n * import {format} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const template = 'Coordinate is ({x}|{y}).';\n * const out = format(coord, template);\n * // out is now 'Coordinate is (8|48).'\n *\n * Example explicitly specifying the fractional digits:\n *\n * import {format} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const template = 'Coordinate is ({x}|{y}).';\n * const out = format(coord, template, 2);\n * // out is now 'Coordinate is (7.85|47.98).'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {string} template A template string with `{x}` and `{y}` placeholders\n * that will be replaced by first and second coordinate values.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} Formatted coordinate.\n * @api\n */\nexport function format(coordinate, template, fractionDigits) {\n if (coordinate) {\n return template\n .replace('{x}', coordinate[0].toFixed(fractionDigits))\n .replace('{y}', coordinate[1].toFixed(fractionDigits));\n }\n return '';\n}\n\n/**\n * @param {Coordinate} coordinate1 First coordinate.\n * @param {Coordinate} coordinate2 Second coordinate.\n * @return {boolean} The two coordinates are equal.\n */\nexport function equals(coordinate1, coordinate2) {\n let equals = true;\n for (let i = coordinate1.length - 1; i >= 0; --i) {\n if (coordinate1[i] != coordinate2[i]) {\n equals = false;\n break;\n }\n }\n return equals;\n}\n\n/**\n * Rotate `coordinate` by `angle`. `coordinate` is modified in place and\n * returned by the function.\n *\n * Example:\n *\n * import {rotate} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const rotateRadians = Math.PI / 2; // 90 degrees\n * rotate(coord, rotateRadians);\n * // coord is now [-47.983333, 7.85]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} angle Angle in radian.\n * @return {Coordinate} Coordinate.\n * @api\n */\nexport function rotate(coordinate, angle) {\n const cosAngle = Math.cos(angle);\n const sinAngle = Math.sin(angle);\n const x = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n const y = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n coordinate[0] = x;\n coordinate[1] = y;\n return coordinate;\n}\n\n/**\n * Scale `coordinate` by `scale`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n * import {scale as scaleCoordinate} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const scale = 1.2;\n * scaleCoordinate(coord, scale);\n * // coord is now [9.42, 57.5799996]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} scale Scale factor.\n * @return {Coordinate} Coordinate.\n */\nexport function scale(coordinate, scale) {\n coordinate[0] *= scale;\n coordinate[1] *= scale;\n return coordinate;\n}\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Squared distance between coord1 and coord2.\n */\nexport function squaredDistance(coord1, coord2) {\n const dx = coord1[0] - coord2[0];\n const dy = coord1[1] - coord2[1];\n return dx * dx + dy * dy;\n}\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Distance between coord1 and coord2.\n */\nexport function distance(coord1, coord2) {\n return Math.sqrt(squaredDistance(coord1, coord2));\n}\n\n/**\n * Calculate the squared distance from a coordinate to a line segment.\n *\n * @param {Coordinate} coordinate Coordinate of the point.\n * @param {Array} segment Line segment (2\n * coordinates).\n * @return {number} Squared distance from the point to the line segment.\n */\nexport function squaredDistanceToSegment(coordinate, segment) {\n return squaredDistance(coordinate, closestOnSegment(coordinate, segment));\n}\n\n/**\n * Format a geographic coordinate with the hemisphere, degrees, minutes, and\n * seconds.\n *\n * Example without specifying fractional digits:\n *\n * import {toStringHDMS} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringHDMS(coord);\n * // out is now '47° 58′ 60″ N 7° 50′ 60″ E'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n * import {toStringHDMS} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringHDMS(coord, 1);\n * // out is now '47° 58′ 60.0″ N 7° 50′ 60.0″ E'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} Hemisphere, degrees, minutes and seconds.\n * @api\n */\nexport function toStringHDMS(coordinate, fractionDigits) {\n if (coordinate) {\n return (\n degreesToStringHDMS('NS', coordinate[1], fractionDigits) +\n ' ' +\n degreesToStringHDMS('EW', coordinate[0], fractionDigits)\n );\n }\n return '';\n}\n\n/**\n * Format a coordinate as a comma delimited string.\n *\n * Example without specifying fractional digits:\n *\n * import {toStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringXY(coord);\n * // out is now '8, 48'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n * import {toStringXY} from 'ol/coordinate.js';\n *\n * const coord = [7.85, 47.983333];\n * const out = toStringXY(coord, 1);\n * // out is now '7.8, 48.0'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} [fractionDigits] The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} XY.\n * @api\n */\nexport function toStringXY(coordinate, fractionDigits) {\n return format(coordinate, '{x}, {y}', fractionDigits);\n}\n\n/**\n * Modifies the provided coordinate in-place to be within the real world\n * extent. The lower projection extent boundary is inclusive, the upper one\n * exclusive.\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {Coordinate} The coordinate within the real world extent.\n */\nexport function wrapX(coordinate, projection) {\n if (projection.canWrapX()) {\n const worldWidth = getWidth(projection.getExtent());\n const worldsAway = getWorldsAway(coordinate, projection, worldWidth);\n if (worldsAway) {\n coordinate[0] -= worldsAway * worldWidth;\n }\n }\n return coordinate;\n}\n/**\n * @param {Coordinate} coordinate Coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @param {number} [sourceExtentWidth] Width of the source extent.\n * @return {number} Offset in world widths.\n */\nexport function getWorldsAway(coordinate, projection, sourceExtentWidth) {\n const projectionExtent = projection.getExtent();\n let worldsAway = 0;\n if (\n projection.canWrapX() &&\n (coordinate[0] < projectionExtent[0] || coordinate[0] > projectionExtent[2])\n ) {\n sourceExtentWidth = sourceExtentWidth || getWidth(projectionExtent);\n worldsAway = Math.floor(\n (coordinate[0] - projectionExtent[0]) / sourceExtentWidth,\n );\n }\n return worldsAway;\n}\n\n/**\n * Compute the angle between p0pA and p0pB\n * @param {Coordinate} p0 Point 0\n * @param {Coordinate} pA Point A\n * @param {Coordinate} pB Point B\n * @return {number} a value in [0, 2PI]\n */\nexport function angleBetween(p0, pA, pB) {\n const lenA = Math.sqrt(\n (pA[0] - p0[0]) * (pA[0] - p0[0]) + (pA[1] - p0[1]) * (pA[1] - p0[1]),\n );\n const tangentA = [(pA[0] - p0[0]) / lenA, (pA[1] - p0[1]) / lenA];\n const orthoA = [-tangentA[1], tangentA[0]];\n const lenB = Math.sqrt(\n (pB[0] - p0[0]) * (pB[0] - p0[0]) + (pB[1] - p0[1]) * (pB[1] - p0[1]),\n );\n const tangentB = [(pB[0] - p0[0]) / lenB, (pB[1] - p0[1]) / lenB];\n\n // this angle can be clockwise or anticlockwise; hence the computation afterwards\n let angle =\n lenA === 0 || lenB === 0\n ? 0\n : Math.acos(\n clamp(tangentB[0] * tangentA[0] + tangentB[1] * tangentA[1], -1, 1),\n );\n angle = Math.max(angle, 0.00001); // avoid a zero angle otherwise this is detected as a line cap\n const isClockwise = tangentB[0] * orthoA[0] + tangentB[1] * orthoA[1] > 0;\n return !isClockwise ? Math.PI * 2 - angle : angle;\n}\n","/**\n * @module ol/proj/Units\n */\n\n/**\n * @typedef {'radians' | 'degrees' | 'ft' | 'm' | 'pixels' | 'tile-pixels' | 'us-ft'} Units\n * Projection units.\n */\n\n/**\n * See http://duff.ess.washington.edu/data/raster/drg/docs/geotiff.txt\n * @type {Object}\n */\nconst unitByCode = {\n '9001': 'm',\n '9002': 'ft',\n '9003': 'us-ft',\n '9101': 'radians',\n '9102': 'degrees',\n};\n\n/**\n * @param {number} code Unit code.\n * @return {Units} Units.\n */\nexport function fromCode(code) {\n return unitByCode[code];\n}\n\n/**\n * @typedef {Object} MetersPerUnitLookup\n * @property {number} radians Radians\n * @property {number} degrees Degrees\n * @property {number} ft Feet\n * @property {number} m Meters\n * @property {number} us-ft US feet\n */\n\n/**\n * Meters per unit lookup table.\n * @const\n * @type {MetersPerUnitLookup}\n * @api\n */\nexport const METERS_PER_UNIT = {\n // use the radius of the Normal sphere\n 'radians': 6370997 / (2 * Math.PI),\n 'degrees': (2 * Math.PI * 6370997) / 360,\n 'ft': 0.3048,\n 'm': 1,\n 'us-ft': 1200 / 3937,\n};\n","/**\n * @module ol/proj/Projection\n */\nimport {METERS_PER_UNIT} from './Units.js';\n\n/**\n * The function is called with a `number` view resolution and a\n * {@link module:ol/coordinate~Coordinate} as arguments, and returns the `number` resolution\n * in projection units at the passed coordinate.\n * @typedef {function(number, import(\"../coordinate.js\").Coordinate):number} GetPointResolution\n * @api\n */\n\n/**\n * @typedef {Object} Options\n * @property {string} code The SRS identifier code, e.g. `EPSG:4326`.\n * @property {import(\"./Units.js\").Units} [units] Units. Required unless a\n * proj4 projection is defined for `code`.\n * @property {import(\"../extent.js\").Extent} [extent] The validity extent for the SRS.\n * @property {string} [axisOrientation='enu'] The axis orientation as specified in Proj4.\n * @property {boolean} [global=false] Whether the projection is valid for the whole globe.\n * @property {number} [metersPerUnit] The meters per unit for the SRS.\n * If not provided, the `units` are used to get the meters per unit from the {@link METERS_PER_UNIT}\n * lookup table.\n * @property {import(\"../extent.js\").Extent} [worldExtent] The world extent for the SRS.\n * @property {GetPointResolution} [getPointResolution]\n * Function to determine resolution at a point. The function is called with a\n * `number` view resolution and a {@link module:ol/coordinate~Coordinate} as arguments, and returns\n * the `number` resolution in projection units at the passed coordinate. If this is `undefined`,\n * the default {@link module:ol/proj.getPointResolution} function will be used.\n */\n\n/**\n * @classdesc\n * In most cases, you should not need to create instances of this class.\n * Instead, where projection information is required, you can use a string\n * projection code or identifier (e.g. `EPSG:4326`) instead of a projection\n * instance.\n *\n * The library includes support for transforming coordinates between the following\n * projections:\n *\n * WGS 84 / Geographic - Using codes `EPSG:4326`, `CRS:84`, `urn:ogc:def:crs:EPSG:6.6:4326`,\n * `urn:ogc:def:crs:OGC:1.3:CRS84`, `urn:ogc:def:crs:OGC:2:84`, `http://www.opengis.net/gml/srs/epsg.xml#4326`,\n * or `urn:x-ogc:def:crs:EPSG:4326`\n * WGS 84 / Spherical Mercator - Using codes `EPSG:3857`, `EPSG:102100`, `EPSG:102113`, `EPSG:900913`,\n * `urn:ogc:def:crs:EPSG:6.18:3:3857`, or `http://www.opengis.net/gml/srs/epsg.xml#3857`\n * WGS 84 / UTM zones - Using codes `EPSG:32601` through `EPSG:32660` for northern zones\n * and `EPSG:32701` through `EPSG:32760` for southern zones. Note that the built-in UTM transforms\n * are lower accuracy (with errors on the order of 0.1 m) than those that you might get in a\n * library like [proj4js](https://github.com/proj4js/proj4js).\n *\n * For additional projection support, or to use higher accuracy transforms than the built-in ones, you can use\n * the [proj4js](https://github.com/proj4js/proj4js) library. With `proj4js`, after adding any new projection\n * definitions, call the {@link module:ol/proj/proj4.register} function.\n *\n * You can use the {@link module:ol/proj.get} function to retrieve a projection instance\n * for one of the registered projections.\n *\n * @api\n */\nclass Projection {\n /**\n * @param {Options} options Projection options.\n */\n constructor(options) {\n /**\n * @private\n * @type {string}\n */\n this.code_ = options.code;\n\n /**\n * Units of projected coordinates. When set to `TILE_PIXELS`, a\n * `this.extent_` and `this.worldExtent_` must be configured properly for each\n * tile.\n * @private\n * @type {import(\"./Units.js\").Units}\n */\n this.units_ = /** @type {import(\"./Units.js\").Units} */ (options.units);\n\n /**\n * Validity extent of the projection in projected coordinates. For projections\n * with `TILE_PIXELS` units, this is the extent of the tile in\n * tile pixel space.\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.extent_ = options.extent !== undefined ? options.extent : null;\n\n /**\n * Extent of the world in EPSG:4326. For projections with\n * `TILE_PIXELS` units, this is the extent of the tile in\n * projected coordinate space.\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.worldExtent_ =\n options.worldExtent !== undefined ? options.worldExtent : null;\n\n /**\n * @private\n * @type {string}\n */\n this.axisOrientation_ =\n options.axisOrientation !== undefined ? options.axisOrientation : 'enu';\n\n /**\n * @private\n * @type {boolean}\n */\n this.global_ = options.global !== undefined ? options.global : false;\n\n /**\n * @private\n * @type {boolean}\n */\n this.canWrapX_ = !!(this.global_ && this.extent_);\n\n /**\n * @private\n * @type {GetPointResolution|undefined}\n */\n this.getPointResolutionFunc_ = options.getPointResolution;\n\n /**\n * @private\n * @type {import(\"../tilegrid/TileGrid.js\").default}\n */\n this.defaultTileGrid_ = null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.metersPerUnit_ = options.metersPerUnit;\n }\n\n /**\n * @return {boolean} The projection is suitable for wrapping the x-axis\n */\n canWrapX() {\n return this.canWrapX_;\n }\n\n /**\n * Get the code for this projection, e.g. 'EPSG:4326'.\n * @return {string} Code.\n * @api\n */\n getCode() {\n return this.code_;\n }\n\n /**\n * Get the validity extent for this projection.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\n getExtent() {\n return this.extent_;\n }\n\n /**\n * Get the units of this projection.\n * @return {import(\"./Units.js\").Units} Units.\n * @api\n */\n getUnits() {\n return this.units_;\n }\n\n /**\n * Get the amount of meters per unit of this projection. If the projection is\n * not configured with `metersPerUnit` or a units identifier, the return is\n * `undefined`.\n * @return {number|undefined} Meters.\n * @api\n */\n getMetersPerUnit() {\n return this.metersPerUnit_ || METERS_PER_UNIT[this.units_];\n }\n\n /**\n * Get the world extent for this projection.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\n getWorldExtent() {\n return this.worldExtent_;\n }\n\n /**\n * Get the axis orientation of this projection.\n * Example values are:\n * enu - the default easting, northing, elevation.\n * neu - northing, easting, up - useful for \"lat/long\" geographic coordinates,\n * or south orientated transverse mercator.\n * wnu - westing, northing, up - some planetary coordinate systems have\n * \"west positive\" coordinate systems\n * @return {string} Axis orientation.\n * @api\n */\n getAxisOrientation() {\n return this.axisOrientation_;\n }\n\n /**\n * Is this projection a global projection which spans the whole world?\n * @return {boolean} Whether the projection is global.\n * @api\n */\n isGlobal() {\n return this.global_;\n }\n\n /**\n * Set if the projection is a global projection which spans the whole world\n * @param {boolean} global Whether the projection is global.\n * @api\n */\n setGlobal(global) {\n this.global_ = global;\n this.canWrapX_ = !!(global && this.extent_);\n }\n\n /**\n * @return {import(\"../tilegrid/TileGrid.js\").default} The default tile grid.\n */\n getDefaultTileGrid() {\n return this.defaultTileGrid_;\n }\n\n /**\n * @param {import(\"../tilegrid/TileGrid.js\").default} tileGrid The default tile grid.\n */\n setDefaultTileGrid(tileGrid) {\n this.defaultTileGrid_ = tileGrid;\n }\n\n /**\n * Set the validity extent for this projection.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @api\n */\n setExtent(extent) {\n this.extent_ = extent;\n this.canWrapX_ = !!(this.global_ && extent);\n }\n\n /**\n * Set the world extent for this projection.\n * @param {import(\"../extent.js\").Extent} worldExtent World extent\n * [minlon, minlat, maxlon, maxlat].\n * @api\n */\n setWorldExtent(worldExtent) {\n this.worldExtent_ = worldExtent;\n }\n\n /**\n * Set the getPointResolution function (see {@link module:ol/proj.getPointResolution}\n * for this projection.\n * @param {function(number, import(\"../coordinate.js\").Coordinate):number} func Function\n * @api\n */\n setGetPointResolution(func) {\n this.getPointResolutionFunc_ = func;\n }\n\n /**\n * Get the custom point resolution function for this projection (if set).\n * @return {GetPointResolution|undefined} The custom point\n * resolution function (if set).\n */\n getPointResolutionFunc() {\n return this.getPointResolutionFunc_;\n }\n}\n\nexport default Projection;\n","/**\n * @module ol/proj/epsg3857\n */\nimport Projection from './Projection.js';\n\n/**\n * Radius of WGS84 sphere\n *\n * @const\n * @type {number}\n */\nexport const RADIUS = 6378137;\n\n/**\n * @const\n * @type {number}\n */\nexport const HALF_SIZE = Math.PI * RADIUS;\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const EXTENT = [-HALF_SIZE, -HALF_SIZE, HALF_SIZE, HALF_SIZE];\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const WORLD_EXTENT = [-180, -85, 180, 85];\n\n/**\n * Maximum safe value in y direction\n * @const\n * @type {number}\n */\nexport const MAX_SAFE_Y = RADIUS * Math.log(Math.tan(Math.PI / 2));\n\n/**\n * @classdesc\n * Projection object for web/spherical Mercator (EPSG:3857).\n */\nclass EPSG3857Projection extends Projection {\n /**\n * @param {string} code Code.\n */\n constructor(code) {\n super({\n code: code,\n units: 'm',\n extent: EXTENT,\n global: true,\n worldExtent: WORLD_EXTENT,\n getPointResolution: function (resolution, point) {\n return resolution / Math.cosh(point[1] / RADIUS);\n },\n });\n }\n}\n\n/**\n * Projections equal to EPSG:3857.\n *\n * @const\n * @type {Array}\n */\nexport const PROJECTIONS = [\n new EPSG3857Projection('EPSG:3857'),\n new EPSG3857Projection('EPSG:102100'),\n new EPSG3857Projection('EPSG:102113'),\n new EPSG3857Projection('EPSG:900913'),\n new EPSG3857Projection('http://www.opengis.net/def/crs/EPSG/0/3857'),\n new EPSG3857Projection('http://www.opengis.net/gml/srs/epsg.xml#3857'),\n];\n\n/**\n * Transformation from EPSG:4326 to EPSG:3857.\n *\n * @param {Array} input Input array of coordinate values.\n * @param {Array} [output] Output array of coordinate values.\n * @param {number} [dimension] Dimension (default is `2`).\n * @param {number} [stride] Stride (default is `dimension`).\n * @return {Array} Output array of coordinate values.\n */\nexport function fromEPSG4326(input, output, dimension, stride) {\n const length = input.length;\n dimension = dimension > 1 ? dimension : 2;\n stride = stride ?? dimension;\n if (output === undefined) {\n if (dimension > 2) {\n // preserve values beyond second dimension\n output = input.slice();\n } else {\n output = new Array(length);\n }\n }\n for (let i = 0; i < length; i += stride) {\n output[i] = (HALF_SIZE * input[i]) / 180;\n let y = RADIUS * Math.log(Math.tan((Math.PI * (+input[i + 1] + 90)) / 360));\n if (y > MAX_SAFE_Y) {\n y = MAX_SAFE_Y;\n } else if (y < -MAX_SAFE_Y) {\n y = -MAX_SAFE_Y;\n }\n output[i + 1] = y;\n }\n return output;\n}\n\n/**\n * Transformation from EPSG:3857 to EPSG:4326.\n *\n * @param {Array} input Input array of coordinate values.\n * @param {Array} [output] Output array of coordinate values.\n * @param {number} [dimension] Dimension (default is `2`).\n * @param {number} [stride] Stride (default is `dimension`).\n * @return {Array} Output array of coordinate values.\n */\nexport function toEPSG4326(input, output, dimension, stride) {\n const length = input.length;\n dimension = dimension > 1 ? dimension : 2;\n stride = stride ?? dimension;\n if (output === undefined) {\n if (dimension > 2) {\n // preserve values beyond second dimension\n output = input.slice();\n } else {\n output = new Array(length);\n }\n }\n for (let i = 0; i < length; i += stride) {\n output[i] = (180 * input[i]) / HALF_SIZE;\n output[i + 1] =\n (360 * Math.atan(Math.exp(input[i + 1] / RADIUS))) / Math.PI - 90;\n }\n return output;\n}\n","/**\n * @module ol/proj/epsg4326\n */\nimport Projection from './Projection.js';\n\n/**\n * Semi-major radius of the WGS84 ellipsoid.\n *\n * @const\n * @type {number}\n */\nexport const RADIUS = 6378137;\n\n/**\n * Extent of the EPSG:4326 projection which is the whole world.\n *\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport const EXTENT = [-180, -90, 180, 90];\n\n/**\n * @const\n * @type {number}\n */\nexport const METERS_PER_UNIT = (Math.PI * RADIUS) / 180;\n\n/**\n * @classdesc\n * Projection object for WGS84 geographic coordinates (EPSG:4326).\n *\n * Note that OpenLayers does not strictly comply with the EPSG definition.\n * The EPSG registry defines 4326 as a CRS for Latitude,Longitude (y,x).\n * OpenLayers treats EPSG:4326 as a pseudo-projection, with x,y coordinates.\n */\nclass EPSG4326Projection extends Projection {\n /**\n * @param {string} code Code.\n * @param {string} [axisOrientation] Axis orientation.\n */\n constructor(code, axisOrientation) {\n super({\n code: code,\n units: 'degrees',\n extent: EXTENT,\n axisOrientation: axisOrientation,\n global: true,\n metersPerUnit: METERS_PER_UNIT,\n worldExtent: EXTENT,\n });\n }\n}\n\n/**\n * Projections equal to EPSG:4326.\n *\n * @const\n * @type {Array}\n */\nexport const PROJECTIONS = [\n new EPSG4326Projection('CRS:84'),\n new EPSG4326Projection('EPSG:4326', 'neu'),\n new EPSG4326Projection('urn:ogc:def:crs:OGC:1.3:CRS84'),\n new EPSG4326Projection('urn:ogc:def:crs:OGC:2:84'),\n new EPSG4326Projection('http://www.opengis.net/def/crs/OGC/1.3/CRS84'),\n new EPSG4326Projection('http://www.opengis.net/gml/srs/epsg.xml#4326', 'neu'),\n new EPSG4326Projection('http://www.opengis.net/def/crs/EPSG/0/4326', 'neu'),\n];\n","/**\n * @module ol/proj/projections\n */\n\n/**\n * @type {Object}\n */\nlet cache = {};\n\n/**\n * Clear the projections cache.\n */\nexport function clear() {\n cache = {};\n}\n\n/**\n * Get a cached projection by code.\n * @param {string} code The code for the projection.\n * @return {import(\"./Projection.js\").default|null} The projection (if cached).\n */\nexport function get(code) {\n return (\n cache[code] ||\n cache[code.replace(/urn:(x-)?ogc:def:crs:EPSG:(.*:)?(\\w+)$/, 'EPSG:$3')] ||\n null\n );\n}\n\n/**\n * Add a projection to the cache.\n * @param {string} code The projection code.\n * @param {import(\"./Projection.js\").default} projection The projection to cache.\n */\nexport function add(code, projection) {\n cache[code] = projection;\n}\n","/**\n * @module ol/proj/transforms\n */\nimport {isEmpty} from '../obj.js';\n\n/**\n * @private\n * @type {!Object>}\n */\nlet transforms = {};\n\n/**\n * Clear the transform cache.\n */\nexport function clear() {\n transforms = {};\n}\n\n/**\n * Registers a conversion function to convert coordinates from the source\n * projection to the destination projection.\n *\n * @param {import(\"./Projection.js\").default} source Source.\n * @param {import(\"./Projection.js\").default} destination Destination.\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform.\n */\nexport function add(source, destination, transformFn) {\n const sourceCode = source.getCode();\n const destinationCode = destination.getCode();\n if (!(sourceCode in transforms)) {\n transforms[sourceCode] = {};\n }\n transforms[sourceCode][destinationCode] = transformFn;\n}\n\n/**\n * Unregisters the conversion function to convert coordinates from the source\n * projection to the destination projection. This method is used to clean up\n * cached transforms during testing.\n *\n * @param {import(\"./Projection.js\").default} source Source projection.\n * @param {import(\"./Projection.js\").default} destination Destination projection.\n * @return {import(\"../proj.js\").TransformFunction} transformFn The unregistered transform.\n */\nexport function remove(source, destination) {\n const sourceCode = source.getCode();\n const destinationCode = destination.getCode();\n const transform = transforms[sourceCode][destinationCode];\n delete transforms[sourceCode][destinationCode];\n if (isEmpty(transforms[sourceCode])) {\n delete transforms[sourceCode];\n }\n return transform;\n}\n\n/**\n * Get a transform given a source code and a destination code.\n * @param {string} sourceCode The code for the source projection.\n * @param {string} destinationCode The code for the destination projection.\n * @return {import(\"../proj.js\").TransformFunction|null} The transform function (if found).\n */\nexport function get(sourceCode, destinationCode) {\n if (sourceCode in transforms && destinationCode in transforms[sourceCode]) {\n return transforms[sourceCode][destinationCode];\n }\n return null;\n}\n","/**\n * @module ol/proj/utm\n */\n\n/**\n * Adapted from https://github.com/Turbo87/utm\n * Copyright (c) 2012-2017 Tobias Bieniek\n *\n * The functions here provide approximate transforms to and from UTM.\n * They are not appropriate for use beyond the validity extend of a UTM\n * zone, and the accuracy of the transform decreases toward the zone\n * edges.\n */\n\nimport {toDegrees, toRadians, wrap} from '../math.js';\nimport Projection from './Projection.js';\n\n/**\n * @typedef {Object} UTMZone\n * @property {number} number The zone number (1 - 60).\n * @property {boolean} north The northern hemisphere.\n */\n\nconst K0 = 0.9996;\n\nconst E = 0.00669438;\nconst E2 = E * E;\nconst E3 = E2 * E;\nconst E_P2 = E / (1 - E);\n\nconst SQRT_E = Math.sqrt(1 - E);\nconst _E = (1 - SQRT_E) / (1 + SQRT_E);\nconst _E2 = _E * _E;\nconst _E3 = _E2 * _E;\nconst _E4 = _E3 * _E;\nconst _E5 = _E4 * _E;\n\nconst M1 = 1 - E / 4 - (3 * E2) / 64 - (5 * E3) / 256;\nconst M2 = (3 * E) / 8 + (3 * E2) / 32 + (45 * E3) / 1024;\nconst M3 = (15 * E2) / 256 + (45 * E3) / 1024;\nconst M4 = (35 * E3) / 3072;\n\nconst P2 = (3 / 2) * _E - (27 / 32) * _E3 + (269 / 512) * _E5;\nconst P3 = (21 / 16) * _E2 - (55 / 32) * _E4;\nconst P4 = (151 / 96) * _E3 - (417 / 128) * _E5;\nconst P5 = (1097 / 512) * _E4;\n\nconst R = 6378137;\n\n/**\n * @param {number} easting Easting value of coordinate.\n * @param {number} northing Northing value of coordinate.\n * @param {UTMZone} zone The UTM zone.\n * @return {import(\"../coordinate.js\").Coordinate} The transformed coordinate.\n */\nfunction toLonLat(easting, northing, zone) {\n const x = easting - 500000;\n const y = zone.north ? northing : northing - 10000000;\n\n const m = y / K0;\n const mu = m / (R * M1);\n\n const pRad =\n mu +\n P2 * Math.sin(2 * mu) +\n P3 * Math.sin(4 * mu) +\n P4 * Math.sin(6 * mu) +\n P5 * Math.sin(8 * mu);\n\n const pSin = Math.sin(pRad);\n const pSin2 = pSin * pSin;\n\n const pCos = Math.cos(pRad);\n\n const pTan = pSin / pCos;\n const pTan2 = pTan * pTan;\n const pTan4 = pTan2 * pTan2;\n\n const epSin = 1 - E * pSin2;\n const epSinSqrt = Math.sqrt(1 - E * pSin2);\n\n const n = R / epSinSqrt;\n const r = (1 - E) / epSin;\n\n const c = E_P2 * pCos ** 2;\n const c2 = c * c;\n\n const d = x / (n * K0);\n const d2 = d * d;\n const d3 = d2 * d;\n const d4 = d3 * d;\n const d5 = d4 * d;\n const d6 = d5 * d;\n\n const latitude =\n pRad -\n (pTan / r) *\n (d2 / 2 - (d4 / 24) * (5 + 3 * pTan2 + 10 * c - 4 * c2 - 9 * E_P2)) +\n (d6 / 720) * (61 + 90 * pTan2 + 298 * c + 45 * pTan4 - 252 * E_P2 - 3 * c2);\n\n let longitude =\n (d -\n (d3 / 6) * (1 + 2 * pTan2 + c) +\n (d5 / 120) * (5 - 2 * c + 28 * pTan2 - 3 * c2 + 8 * E_P2 + 24 * pTan4)) /\n pCos;\n\n longitude = wrap(\n longitude + toRadians(zoneToCentralLongitude(zone.number)),\n -Math.PI,\n Math.PI,\n );\n\n return [toDegrees(longitude), toDegrees(latitude)];\n}\n\nconst MIN_LATITUDE = -80;\nconst MAX_LATITUDE = 84;\nconst MIN_LONGITUDE = -180;\nconst MAX_LONGITUDE = 180;\n\n/**\n * @param {number} longitude The longitude.\n * @param {number} latitude The latitude.\n * @param {UTMZone} zone The UTM zone.\n * @return {import('../coordinate.js').Coordinate} The UTM coordinate.\n */\nfunction fromLonLat(longitude, latitude, zone) {\n longitude = wrap(longitude, MIN_LONGITUDE, MAX_LONGITUDE);\n\n if (latitude < MIN_LATITUDE) {\n latitude = MIN_LATITUDE;\n } else if (latitude > MAX_LATITUDE) {\n latitude = MAX_LATITUDE;\n }\n\n const latRad = toRadians(latitude);\n const latSin = Math.sin(latRad);\n const latCos = Math.cos(latRad);\n\n const latTan = latSin / latCos;\n const latTan2 = latTan * latTan;\n const latTan4 = latTan2 * latTan2;\n\n const lonRad = toRadians(longitude);\n const centralLon = zoneToCentralLongitude(zone.number);\n const centralLonRad = toRadians(centralLon);\n\n const n = R / Math.sqrt(1 - E * latSin ** 2);\n const c = E_P2 * latCos ** 2;\n\n const a = latCos * wrap(lonRad - centralLonRad, -Math.PI, Math.PI);\n const a2 = a * a;\n const a3 = a2 * a;\n const a4 = a3 * a;\n const a5 = a4 * a;\n const a6 = a5 * a;\n\n const m =\n R *\n (M1 * latRad -\n M2 * Math.sin(2 * latRad) +\n M3 * Math.sin(4 * latRad) -\n M4 * Math.sin(6 * latRad));\n\n const easting =\n K0 *\n n *\n (a +\n (a3 / 6) * (1 - latTan2 + c) +\n (a5 / 120) * (5 - 18 * latTan2 + latTan4 + 72 * c - 58 * E_P2)) +\n 500000;\n\n let northing =\n K0 *\n (m +\n n *\n latTan *\n (a2 / 2 +\n (a4 / 24) * (5 - latTan2 + 9 * c + 4 * c ** 2) +\n (a6 / 720) * (61 - 58 * latTan2 + latTan4 + 600 * c - 330 * E_P2)));\n\n if (!zone.north) {\n northing += 10000000;\n }\n\n return [easting, northing];\n}\n\n/**\n * @param {number} zone The zone number.\n * @return {number} The central longitude in degrees.\n */\nfunction zoneToCentralLongitude(zone) {\n return (zone - 1) * 6 - 180 + 3;\n}\n\n/**\n * @type {Array}\n */\nconst epsgRegExes = [\n /^EPSG:(\\d+)$/,\n /^urn:ogc:def:crs:EPSG::(\\d+)$/,\n /^http:\\/\\/www\\.opengis\\.net\\/def\\/crs\\/EPSG\\/0\\/(\\d+)$/,\n];\n\n/**\n * @param {string} code The projection code.\n * @return {UTMZone|null} The UTM zone info (or null if not UTM).\n */\nexport function zoneFromCode(code) {\n let epsgId = 0;\n for (const re of epsgRegExes) {\n const match = code.match(re);\n if (match) {\n epsgId = parseInt(match[1]);\n break;\n }\n }\n if (!epsgId) {\n return null;\n }\n\n let number = 0;\n let north = false;\n if (epsgId > 32700 && epsgId < 32761) {\n number = epsgId - 32700;\n } else if (epsgId > 32600 && epsgId < 32661) {\n north = true;\n number = epsgId - 32600;\n }\n if (!number) {\n return null;\n }\n\n return {number, north};\n}\n\n/**\n * @param {function(number, number, UTMZone): import('../coordinate.js').Coordinate} transformer The transformer.\n * @param {UTMZone} zone The UTM zone.\n * @return {import('../proj.js').TransformFunction} The transform function.\n */\nfunction makeTransformFunction(transformer, zone) {\n return function (input, output, dimension, stride) {\n const length = input.length;\n dimension = dimension > 1 ? dimension : 2;\n stride = stride ?? dimension;\n if (!output) {\n if (dimension > 2) {\n output = input.slice();\n } else {\n output = new Array(length);\n }\n }\n for (let i = 0; i < length; i += stride) {\n const x = input[i];\n const y = input[i + 1];\n const coord = transformer(x, y, zone);\n output[i] = coord[0];\n output[i + 1] = coord[1];\n }\n return output;\n };\n}\n\n/**\n * @param {string} code The projection code.\n * @return {import('./Projection.js').default|null} A projection or null if unable to create one.\n */\nexport function makeProjection(code) {\n const zone = zoneFromCode(code);\n if (!zone) {\n return null;\n }\n return new Projection({code, units: 'm'});\n}\n\n/**\n * @param {import('./Projection.js').default} projection The projection.\n * @return {import('../proj.js').Transforms|null} The transforms lookup or null if unable to handle projection.\n */\nexport function makeTransforms(projection) {\n const zone = zoneFromCode(projection.getCode());\n if (!zone) {\n return null;\n }\n\n return {\n forward: makeTransformFunction(fromLonLat, zone),\n inverse: makeTransformFunction(toLonLat, zone),\n };\n}\n","/**\n * @module ol/proj\n */\n\n/**\n * The ol/proj module stores:\n * a list of {@link module:ol/proj/Projection~Projection}\n * objects, one for each projection supported by the application\n * a list of transform functions needed to convert coordinates in one projection\n * into another.\n *\n * The static functions are the methods used to maintain these.\n * Each transform function can handle not only simple coordinate pairs, but also\n * large arrays of coordinates such as vector geometries.\n *\n * When loaded, the library adds projection objects for EPSG:4326 (WGS84\n * geographic coordinates) and EPSG:3857 (Web or Spherical Mercator, as used\n * for example by Bing Maps or OpenStreetMap), together with the relevant\n * transform functions.\n *\n * Additional transforms may be added by using the http://proj4js.org/\n * library (version 2.2 or later). You can use the full build supplied by\n * Proj4js, or create a custom build to support those projections you need; see\n * the Proj4js website for how to do this. You also need the Proj4js definitions\n * for the required projections. These definitions can be obtained from\n * https://spatialreference.org/, and are a JS function, so can be loaded in a\n * script tag (as in the examples) or pasted into your application.\n *\n * After all required projection definitions are added to proj4's registry (by\n * using `proj4.defs()`), simply call `register(proj4)` from the `ol/proj/proj4`\n * package. Existing transforms are not changed by this function. See\n * examples/wms-image-custom-proj for an example of this.\n *\n * Additional projection definitions can be registered with `proj4.defs()` any\n * time. Just make sure to call `register(proj4)` again; for example, with user-supplied data where you don't\n * know in advance what projections are needed, you can initially load minimal\n * support and then load whichever are requested.\n *\n * Note that Proj4js does not support projection extents. If you want to add\n * one for creating default tile grids, you can add it after the Projection\n * object has been created with `setExtent`, for example,\n * `get('EPSG:1234').setExtent(extent)`.\n *\n * In addition to Proj4js support, any transform functions can be added with\n * {@link module:ol/proj.addCoordinateTransforms}. To use this, you must first create\n * a {@link module:ol/proj/Projection~Projection} object for the new projection and add it with\n * {@link module:ol/proj.addProjection}. You can then add the forward and inverse\n * functions with {@link module:ol/proj.addCoordinateTransforms}. See\n * examples/wms-custom-proj for an example of this.\n *\n * Note that if no transforms are needed and you only need to define the\n * projection, just add a {@link module:ol/proj/Projection~Projection} with\n * {@link module:ol/proj.addProjection}. See examples/wms-no-proj for an example of\n * this.\n */\nimport {warn} from './console.js';\nimport {equals, getWorldsAway} from './coordinate.js';\nimport {applyTransform, getWidth} from './extent.js';\nimport {clamp, modulo} from './math.js';\nimport Projection from './proj/Projection.js';\nimport {METERS_PER_UNIT} from './proj/Units.js';\nimport {\n PROJECTIONS as EPSG3857_PROJECTIONS,\n fromEPSG4326,\n toEPSG4326,\n} from './proj/epsg3857.js';\nimport {PROJECTIONS as EPSG4326_PROJECTIONS} from './proj/epsg4326.js';\nimport {\n add as addProj,\n clear as clearProj,\n get as getProj,\n} from './proj/projections.js';\nimport {\n add as addTransformFunc,\n clear as clearTransformFuncs,\n get as getTransformFunc,\n} from './proj/transforms.js';\nimport {\n makeProjection as makeUTMProjection,\n makeTransforms as makeUTMTransforms,\n} from './proj/utm.js';\nimport {getDistance} from './sphere.js';\n\n/**\n * A projection as {@link module:ol/proj/Projection~Projection}, SRS identifier\n * string or undefined.\n * @typedef {Projection|string|undefined} ProjectionLike\n * @api\n */\n\n/**\n * @typedef {Object} Transforms\n * @property {TransformFunction} forward The forward transform (from geographic).\n * @property {TransformFunction} inverse The inverse transform (to geographic).\n */\n\n/**\n * @type {Array}\n */\nconst transformFactories = [makeUTMTransforms];\n\n/**\n * @type {Array}\n */\nconst projectionFactories = [makeUTMProjection];\n\n/**\n * A transform function accepts an array of input coordinate values, an optional\n * output array, and an optional dimension (default should be 2). The function\n * transforms the input coordinate values, populates the output array, and\n * returns the output array.\n *\n * @callback TransformFunction\n * @param {Array} input\n * @param {Array} [output]\n * @param {number} [dimension]\n * @param {number} [stride]\n * @return {Array}\n *\n * @api\n */\n\nexport {METERS_PER_UNIT};\n\nexport {Projection};\n\nlet showCoordinateWarning = true;\n\n/**\n * @param {boolean} [disable] Disable console info about `useGeographic()`\n */\nexport function disableCoordinateWarning(disable) {\n const hide = disable === undefined ? true : disable;\n showCoordinateWarning = !hide;\n}\n\n/**\n * @param {Array} input Input coordinate array.\n * @param {Array} [output] Output array of coordinate values.\n * @return {Array} Output coordinate array (new array, same coordinate\n * values).\n */\nexport function cloneTransform(input, output) {\n if (output !== undefined) {\n for (let i = 0, ii = input.length; i < ii; ++i) {\n output[i] = input[i];\n }\n output = output;\n } else {\n output = input.slice();\n }\n return output;\n}\n\n/**\n * @param {Array} input Input coordinate array.\n * @param {Array} [output] Output array of coordinate values.\n * @return {Array} Input coordinate array (same array as input).\n */\nexport function identityTransform(input, output) {\n if (output !== undefined && input !== output) {\n for (let i = 0, ii = input.length; i < ii; ++i) {\n output[i] = input[i];\n }\n input = output;\n }\n return input;\n}\n\n/**\n * Add a Projection object to the list of supported projections that can be\n * looked up by their code.\n *\n * @param {Projection} projection Projection instance.\n * @api\n */\nexport function addProjection(projection) {\n addProj(projection.getCode(), projection);\n addTransformFunc(projection, projection, cloneTransform);\n}\n\n/**\n * @param {Array} projections Projections.\n */\nexport function addProjections(projections) {\n projections.forEach(addProjection);\n}\n\n/**\n * Fetches a Projection object for the code specified.\n *\n * @param {ProjectionLike} projectionLike Either a code string which is\n * a combination of authority and identifier such as \"EPSG:4326\", or an\n * existing projection object, or undefined.\n * @return {Projection|null} Projection object, or null if not in list.\n * @api\n */\nexport function get(projectionLike) {\n if (!(typeof projectionLike === 'string')) {\n return projectionLike;\n }\n const projection = getProj(projectionLike);\n if (projection) {\n return projection;\n }\n for (const makeProjection of projectionFactories) {\n const projection = makeProjection(projectionLike);\n if (projection) {\n return projection;\n }\n }\n return null;\n}\n\n/**\n * Get the resolution of the point in degrees or distance units.\n * For projections with degrees as the unit this will simply return the\n * provided resolution. For other projections the point resolution is\n * by default estimated by transforming the `point` pixel to EPSG:4326,\n * measuring its width and height on the normal sphere,\n * and taking the average of the width and height.\n * A custom function can be provided for a specific projection, either\n * by setting the `getPointResolution` option in the\n * {@link module:ol/proj/Projection~Projection} constructor or by using\n * {@link module:ol/proj/Projection~Projection#setGetPointResolution} to change an existing\n * projection object.\n * @param {ProjectionLike} projection The projection.\n * @param {number} resolution Nominal resolution in projection units.\n * @param {import(\"./coordinate.js\").Coordinate} point Point to find adjusted resolution at.\n * @param {import(\"./proj/Units.js\").Units} [units] Units to get the point resolution in.\n * Default is the projection's units.\n * @return {number} Point resolution.\n * @api\n */\nexport function getPointResolution(projection, resolution, point, units) {\n projection = get(projection);\n let pointResolution;\n const getter = projection.getPointResolutionFunc();\n if (getter) {\n pointResolution = getter(resolution, point);\n if (units && units !== projection.getUnits()) {\n const metersPerUnit = projection.getMetersPerUnit();\n if (metersPerUnit) {\n pointResolution =\n (pointResolution * metersPerUnit) / METERS_PER_UNIT[units];\n }\n }\n } else {\n const projUnits = projection.getUnits();\n if ((projUnits == 'degrees' && !units) || units == 'degrees') {\n pointResolution = resolution;\n } else {\n // Estimate point resolution by transforming the center pixel to EPSG:4326,\n // measuring its width and height on the normal sphere, and taking the\n // average of the width and height.\n const toEPSG4326 = getTransformFromProjections(\n projection,\n get('EPSG:4326'),\n );\n if (!toEPSG4326 && projUnits !== 'degrees') {\n // no transform is available\n pointResolution = resolution * projection.getMetersPerUnit();\n } else {\n let vertices = [\n point[0] - resolution / 2,\n point[1],\n point[0] + resolution / 2,\n point[1],\n point[0],\n point[1] - resolution / 2,\n point[0],\n point[1] + resolution / 2,\n ];\n vertices = toEPSG4326(vertices, vertices, 2);\n const width = getDistance(vertices.slice(0, 2), vertices.slice(2, 4));\n const height = getDistance(vertices.slice(4, 6), vertices.slice(6, 8));\n pointResolution = (width + height) / 2;\n }\n const metersPerUnit = units\n ? METERS_PER_UNIT[units]\n : projection.getMetersPerUnit();\n if (metersPerUnit !== undefined) {\n pointResolution /= metersPerUnit;\n }\n }\n }\n return pointResolution;\n}\n\n/**\n * Registers transformation functions that don't alter coordinates. Those allow\n * to transform between projections with equal meaning.\n *\n * @param {Array} projections Projections.\n * @api\n */\nexport function addEquivalentProjections(projections) {\n addProjections(projections);\n projections.forEach(function (source) {\n projections.forEach(function (destination) {\n if (source !== destination) {\n addTransformFunc(source, destination, cloneTransform);\n }\n });\n });\n}\n\n/**\n * Registers transformation functions to convert coordinates in any projection\n * in projection1 to any projection in projection2.\n *\n * @param {Array} projections1 Projections with equal\n * meaning.\n * @param {Array} projections2 Projections with equal\n * meaning.\n * @param {TransformFunction} forwardTransform Transformation from any\n * projection in projection1 to any projection in projection2.\n * @param {TransformFunction} inverseTransform Transform from any projection\n * in projection2 to any projection in projection1..\n */\nexport function addEquivalentTransforms(\n projections1,\n projections2,\n forwardTransform,\n inverseTransform,\n) {\n projections1.forEach(function (projection1) {\n projections2.forEach(function (projection2) {\n addTransformFunc(projection1, projection2, forwardTransform);\n addTransformFunc(projection2, projection1, inverseTransform);\n });\n });\n}\n\n/**\n * Clear all cached projections and transforms.\n */\nexport function clearAllProjections() {\n clearProj();\n clearTransformFuncs();\n}\n\n/**\n * @param {Projection|string|undefined} projection Projection.\n * @param {string} defaultCode Default code.\n * @return {Projection} Projection.\n */\nexport function createProjection(projection, defaultCode) {\n if (!projection) {\n return get(defaultCode);\n }\n if (typeof projection === 'string') {\n return get(projection);\n }\n return /** @type {Projection} */ (projection);\n}\n\n/**\n * Creates a {@link module:ol/proj~TransformFunction} from a simple 2D coordinate transform\n * function.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} coordTransform Coordinate\n * transform.\n * @return {TransformFunction} Transform function.\n */\nexport function createTransformFromCoordinateTransform(coordTransform) {\n return (\n /**\n * @param {Array} input Input.\n * @param {Array} [output] Output.\n * @param {number} [dimension] Dimensions that should be transformed.\n * @param {number} [stride] Stride.\n * @return {Array} Output.\n */\n function (input, output, dimension, stride) {\n const length = input.length;\n dimension = dimension !== undefined ? dimension : 2;\n stride = stride ?? dimension;\n output = output !== undefined ? output : new Array(length);\n for (let i = 0; i < length; i += stride) {\n const point = coordTransform(input.slice(i, i + dimension));\n const pointLength = point.length;\n for (let j = 0, jj = stride; j < jj; ++j) {\n output[i + j] = j >= pointLength ? input[i + j] : point[j];\n }\n }\n return output;\n }\n );\n}\n\n/**\n * Registers coordinate transform functions to convert coordinates between the\n * source projection and the destination projection.\n * The forward and inverse functions convert coordinate pairs; this function\n * converts these into the functions used internally which also handle\n * extents and coordinate arrays.\n *\n * @param {ProjectionLike} source Source projection.\n * @param {ProjectionLike} destination Destination projection.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} forward The forward transform\n * function (that is, from the source projection to the destination\n * projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n * the transformed {@link module:ol/coordinate~Coordinate}.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} inverse The inverse transform\n * function (that is, from the destination projection to the source\n * projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n * the transformed {@link module:ol/coordinate~Coordinate}. If the transform function can only\n * transform less dimensions than the input coordinate, it is supposeed to return a coordinate\n * with only the length it can transform. The other dimensions will be taken unchanged from the\n * source.\n * @api\n */\nexport function addCoordinateTransforms(source, destination, forward, inverse) {\n const sourceProj = get(source);\n const destProj = get(destination);\n addTransformFunc(\n sourceProj,\n destProj,\n createTransformFromCoordinateTransform(forward),\n );\n addTransformFunc(\n destProj,\n sourceProj,\n createTransformFromCoordinateTransform(inverse),\n );\n}\n\n/**\n * Transforms a coordinate from longitude/latitude to a different projection.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate as longitude and latitude, i.e.\n * an array with longitude as 1st and latitude as 2nd element.\n * @param {ProjectionLike} [projection] Target projection. The\n * default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate projected to the target projection.\n * @api\n */\nexport function fromLonLat(coordinate, projection) {\n disableCoordinateWarning();\n return transform(\n coordinate,\n 'EPSG:4326',\n projection !== undefined ? projection : 'EPSG:3857',\n );\n}\n\n/**\n * Transforms a coordinate to longitude/latitude.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Projected coordinate.\n * @param {ProjectionLike} [projection] Projection of the coordinate.\n * The default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate as longitude and latitude, i.e. an array\n * with longitude as 1st and latitude as 2nd element.\n * @api\n */\nexport function toLonLat(coordinate, projection) {\n const lonLat = transform(\n coordinate,\n projection !== undefined ? projection : 'EPSG:3857',\n 'EPSG:4326',\n );\n const lon = lonLat[0];\n if (lon < -180 || lon > 180) {\n lonLat[0] = modulo(lon + 180, 360) - 180;\n }\n return lonLat;\n}\n\n/**\n * Checks if two projections are the same, that is every coordinate in one\n * projection does represent the same geographic point as the same coordinate in\n * the other projection.\n *\n * @param {Projection} projection1 Projection 1.\n * @param {Projection} projection2 Projection 2.\n * @return {boolean} Equivalent.\n * @api\n */\nexport function equivalent(projection1, projection2) {\n if (projection1 === projection2) {\n return true;\n }\n const equalUnits = projection1.getUnits() === projection2.getUnits();\n if (projection1.getCode() === projection2.getCode()) {\n return equalUnits;\n }\n const transformFunc = getTransformFromProjections(projection1, projection2);\n return transformFunc === cloneTransform && equalUnits;\n}\n\n/**\n * Searches in the list of transform functions for the function for converting\n * coordinates from the source projection to the destination projection.\n *\n * @param {Projection} source Source Projection object.\n * @param {Projection} destination Destination Projection\n * object.\n * @return {TransformFunction|null} Transform function.\n */\nexport function getTransformFromProjections(source, destination) {\n const sourceCode = source.getCode();\n const destinationCode = destination.getCode();\n let transformFunc = getTransformFunc(sourceCode, destinationCode);\n if (transformFunc) {\n return transformFunc;\n }\n\n /**\n * @type {Transforms|null}\n */\n let sourceTransforms = null;\n\n /**\n * @type {Transforms|null}\n */\n let destinationTransforms = null;\n\n // lazily add projections if we have supported transforms\n for (const makeTransforms of transformFactories) {\n if (!sourceTransforms) {\n sourceTransforms = makeTransforms(source);\n }\n if (!destinationTransforms) {\n destinationTransforms = makeTransforms(destination);\n }\n }\n\n if (!sourceTransforms && !destinationTransforms) {\n return null;\n }\n\n const intermediateCode = 'EPSG:4326';\n if (!destinationTransforms) {\n const toDestination = getTransformFunc(intermediateCode, destinationCode);\n if (toDestination) {\n transformFunc = composeTransformFuncs(\n sourceTransforms.inverse,\n toDestination,\n );\n }\n } else if (!sourceTransforms) {\n const fromSource = getTransformFunc(sourceCode, intermediateCode);\n if (fromSource) {\n transformFunc = composeTransformFuncs(\n fromSource,\n destinationTransforms.forward,\n );\n }\n } else {\n transformFunc = composeTransformFuncs(\n sourceTransforms.inverse,\n destinationTransforms.forward,\n );\n }\n\n if (transformFunc) {\n addProjection(source);\n addProjection(destination);\n addTransformFunc(source, destination, transformFunc);\n }\n\n return transformFunc;\n}\n\n/**\n * @param {TransformFunction} t1 The first transform function.\n * @param {TransformFunction} t2 The second transform function.\n * @return {TransformFunction} The composed transform function.\n */\nfunction composeTransformFuncs(t1, t2) {\n return function (input, output, dimensions, stride) {\n output = t1(input, output, dimensions, stride);\n return t2(output, output, dimensions, stride);\n };\n}\n\n/**\n * Given the projection-like objects, searches for a transformation\n * function to convert a coordinates array from the source projection to the\n * destination projection.\n *\n * @param {ProjectionLike} source Source.\n * @param {ProjectionLike} destination Destination.\n * @return {TransformFunction} Transform function.\n * @api\n */\nexport function getTransform(source, destination) {\n const sourceProjection = get(source);\n const destinationProjection = get(destination);\n return getTransformFromProjections(sourceProjection, destinationProjection);\n}\n\n/**\n * Transforms a coordinate from source projection to destination projection.\n * This returns a new coordinate (and does not modify the original). If there\n * is no available transform between the two projection, the function will throw\n * an error.\n *\n * See {@link module:ol/proj.transformExtent} for extent transformation.\n * See the transform method of {@link module:ol/geom/Geometry~Geometry} and its\n * subclasses for geometry transforms.\n *\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n * @api\n */\nexport function transform(coordinate, source, destination) {\n const transformFunc = getTransform(source, destination);\n if (!transformFunc) {\n const sourceCode = get(source).getCode();\n const destinationCode = get(destination).getCode();\n throw new Error(\n `No transform available between ${sourceCode} and ${destinationCode}`,\n );\n }\n return transformFunc(coordinate, undefined, coordinate.length);\n}\n\n/**\n * Transforms an extent from source projection to destination projection. This\n * returns a new extent (and does not modify the original).\n *\n * @param {import(\"./extent.js\").Extent} extent The extent to transform.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @param {number} [stops] Number of stops per side used for the transform.\n * By default only the corners are used.\n * @return {import(\"./extent.js\").Extent} The transformed extent.\n * @api\n */\nexport function transformExtent(extent, source, destination, stops) {\n const transformFunc = getTransform(source, destination);\n return applyTransform(extent, transformFunc, undefined, stops);\n}\n\n/**\n * Transforms the given point to the destination projection.\n *\n * @param {import(\"./coordinate.js\").Coordinate} point Point.\n * @param {Projection} sourceProjection Source projection.\n * @param {Projection} destinationProjection Destination projection.\n * @return {import(\"./coordinate.js\").Coordinate} Point.\n */\nexport function transformWithProjections(\n point,\n sourceProjection,\n destinationProjection,\n) {\n const transformFunc = getTransformFromProjections(\n sourceProjection,\n destinationProjection,\n );\n return transformFunc(point);\n}\n\n/**\n * @type {Projection|null}\n */\nlet userProjection = null;\n\n/**\n * Set the projection for coordinates supplied from and returned by API methods.\n * This includes all API methods except for those interacting with tile grids,\n * plus {@link import(\"./Map.js\").FrameState} and {@link import(\"./View.js\").State}.\n * @param {ProjectionLike} projection The user projection.\n * @api\n */\nexport function setUserProjection(projection) {\n userProjection = get(projection);\n}\n\n/**\n * Clear the user projection if set.\n * @api\n */\nexport function clearUserProjection() {\n userProjection = null;\n}\n\n/**\n * Get the projection for coordinates supplied from and returned by API methods.\n * @return {Projection|null} The user projection (or null if not set).\n * @api\n */\nexport function getUserProjection() {\n return userProjection;\n}\n\n/**\n * Use geographic coordinates (WGS-84 datum) in API methods.\n * This includes all API methods except for those interacting with tile grids,\n * plus {@link import(\"./Map.js\").FrameState} and {@link import(\"./View.js\").State}.\n * @api\n */\nexport function useGeographic() {\n setUserProjection('EPSG:4326');\n}\n\n/**\n * Return a coordinate transformed into the user projection. If no user projection\n * is set, the original coordinate is returned.\n * @param {Array} coordinate Input coordinate.\n * @param {ProjectionLike} sourceProjection The input coordinate projection.\n * @return {Array} The input coordinate in the user projection.\n */\nexport function toUserCoordinate(coordinate, sourceProjection) {\n if (!userProjection) {\n return coordinate;\n }\n return transform(coordinate, sourceProjection, userProjection);\n}\n\n/**\n * Return a coordinate transformed from the user projection. If no user projection\n * is set, the original coordinate is returned.\n * @param {Array} coordinate Input coordinate.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {Array} The input coordinate transformed.\n */\nexport function fromUserCoordinate(coordinate, destProjection) {\n if (!userProjection) {\n if (\n showCoordinateWarning &&\n !equals(coordinate, [0, 0]) &&\n coordinate[0] >= -180 &&\n coordinate[0] <= 180 &&\n coordinate[1] >= -90 &&\n coordinate[1] <= 90\n ) {\n showCoordinateWarning = false;\n warn(\n 'Call useGeographic() from ol/proj once to work with [longitude, latitude] coordinates.',\n );\n }\n return coordinate;\n }\n return transform(coordinate, userProjection, destProjection);\n}\n\n/**\n * Return an extent transformed into the user projection. If no user projection\n * is set, the original extent is returned.\n * @param {import(\"./extent.js\").Extent} extent Input extent.\n * @param {ProjectionLike} sourceProjection The input extent projection.\n * @return {import(\"./extent.js\").Extent} The input extent in the user projection.\n */\nexport function toUserExtent(extent, sourceProjection) {\n if (!userProjection) {\n return extent;\n }\n return transformExtent(extent, sourceProjection, userProjection);\n}\n\n/**\n * Return an extent transformed from the user projection. If no user projection\n * is set, the original extent is returned.\n * @param {import(\"./extent.js\").Extent} extent Input extent.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {import(\"./extent.js\").Extent} The input extent transformed.\n */\nexport function fromUserExtent(extent, destProjection) {\n if (!userProjection) {\n return extent;\n }\n return transformExtent(extent, userProjection, destProjection);\n}\n\n/**\n * Return the resolution in user projection units per pixel. If no user projection\n * is set, or source or user projection are missing units, the original resolution\n * is returned.\n * @param {number} resolution Resolution in input projection units per pixel.\n * @param {ProjectionLike} sourceProjection The input projection.\n * @return {number} Resolution in user projection units per pixel.\n */\nexport function toUserResolution(resolution, sourceProjection) {\n if (!userProjection) {\n return resolution;\n }\n const sourceMetersPerUnit = get(sourceProjection).getMetersPerUnit();\n const userMetersPerUnit = userProjection.getMetersPerUnit();\n return sourceMetersPerUnit && userMetersPerUnit\n ? (resolution * sourceMetersPerUnit) / userMetersPerUnit\n : resolution;\n}\n\n/**\n * Return the resolution in user projection units per pixel. If no user projection\n * is set, or source or user projection are missing units, the original resolution\n * is returned.\n * @param {number} resolution Resolution in user projection units per pixel.\n * @param {ProjectionLike} destProjection The destination projection.\n * @return {number} Resolution in destination projection units per pixel.\n */\nexport function fromUserResolution(resolution, destProjection) {\n if (!userProjection) {\n return resolution;\n }\n const destMetersPerUnit = get(destProjection).getMetersPerUnit();\n const userMetersPerUnit = userProjection.getMetersPerUnit();\n return destMetersPerUnit && userMetersPerUnit\n ? (resolution * userMetersPerUnit) / destMetersPerUnit\n : resolution;\n}\n\n/**\n * Creates a safe coordinate transform function from a coordinate transform function.\n * \"Safe\" means that it can handle wrapping of x-coordinates for global projections,\n * and that coordinates exceeding the source projection validity extent's range will be\n * clamped to the validity range.\n * @param {Projection} sourceProj Source projection.\n * @param {Projection} destProj Destination projection.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} transform Transform function (source to destination).\n * @return {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} Safe transform function (source to destination).\n */\nexport function createSafeCoordinateTransform(sourceProj, destProj, transform) {\n return function (coord) {\n let transformed, worldsAway;\n if (sourceProj.canWrapX()) {\n const sourceExtent = sourceProj.getExtent();\n const sourceExtentWidth = getWidth(sourceExtent);\n coord = coord.slice(0);\n worldsAway = getWorldsAway(coord, sourceProj, sourceExtentWidth);\n if (worldsAway) {\n // Move x to the real world\n coord[0] = coord[0] - worldsAway * sourceExtentWidth;\n }\n coord[0] = clamp(coord[0], sourceExtent[0], sourceExtent[2]);\n coord[1] = clamp(coord[1], sourceExtent[1], sourceExtent[3]);\n transformed = transform(coord);\n } else {\n transformed = transform(coord);\n }\n if (worldsAway && destProj.canWrapX()) {\n // Move transformed coordinate back to the offset world\n transformed[0] += worldsAway * getWidth(destProj.getExtent());\n }\n return transformed;\n };\n}\n\n/**\n * Add transforms to and from EPSG:4326 and EPSG:3857. This function is called\n * by when this module is executed and should only need to be called again after\n * `clearAllProjections()` is called (e.g. in tests).\n */\nexport function addCommon() {\n // Add transformations that don't alter coordinates to convert within set of\n // projections with equal meaning.\n addEquivalentProjections(EPSG3857_PROJECTIONS);\n addEquivalentProjections(EPSG4326_PROJECTIONS);\n // Add transformations to convert EPSG:4326 like coordinates to EPSG:3857 like\n // coordinates and back.\n addEquivalentTransforms(\n EPSG4326_PROJECTIONS,\n EPSG3857_PROJECTIONS,\n fromEPSG4326,\n toEPSG4326,\n );\n}\n\naddCommon();\n","/**\n * @module ol/transform\n */\nimport {assert} from './asserts.js';\n\n/**\n * An array representing an affine 2d transformation for use with\n * {@link module:ol/transform} functions. The array has 6 elements.\n * @typedef {!Array} Transform\n * @api\n */\n\n/**\n * Collection of affine 2d transformation functions. The functions work on an\n * array of 6 elements. The element order is compatible with the [SVGMatrix\n * interface](https://developer.mozilla.org/en-US/docs/Web/API/SVGMatrix) and is\n * a subset (elements a to f) of a 3×3 matrix:\n * ```\n * [ a c e ]\n * [ b d f ]\n * [ 0 0 1 ]\n * ```\n */\n\n/**\n * @private\n * @type {Transform}\n */\nconst tmp_ = new Array(6);\n\n/**\n * Create an identity transform.\n * @return {!Transform} Identity transform.\n */\nexport function create() {\n return [1, 0, 0, 1, 0, 0];\n}\n\n/**\n * Resets the given transform to an identity transform.\n * @param {!Transform} transform Transform.\n * @return {!Transform} Transform.\n */\nexport function reset(transform) {\n return set(transform, 1, 0, 0, 1, 0, 0);\n}\n\n/**\n * Multiply the underlying matrices of two transforms and return the result in\n * the first transform.\n * @param {!Transform} transform1 Transform parameters of matrix 1.\n * @param {!Transform} transform2 Transform parameters of matrix 2.\n * @return {!Transform} transform1 multiplied with transform2.\n */\nexport function multiply(transform1, transform2) {\n const a1 = transform1[0];\n const b1 = transform1[1];\n const c1 = transform1[2];\n const d1 = transform1[3];\n const e1 = transform1[4];\n const f1 = transform1[5];\n const a2 = transform2[0];\n const b2 = transform2[1];\n const c2 = transform2[2];\n const d2 = transform2[3];\n const e2 = transform2[4];\n const f2 = transform2[5];\n\n transform1[0] = a1 * a2 + c1 * b2;\n transform1[1] = b1 * a2 + d1 * b2;\n transform1[2] = a1 * c2 + c1 * d2;\n transform1[3] = b1 * c2 + d1 * d2;\n transform1[4] = a1 * e2 + c1 * f2 + e1;\n transform1[5] = b1 * e2 + d1 * f2 + f1;\n\n return transform1;\n}\n\n/**\n * Set the transform components a-f on a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} a The a component of the transform.\n * @param {number} b The b component of the transform.\n * @param {number} c The c component of the transform.\n * @param {number} d The d component of the transform.\n * @param {number} e The e component of the transform.\n * @param {number} f The f component of the transform.\n * @return {!Transform} Matrix with transform applied.\n */\nexport function set(transform, a, b, c, d, e, f) {\n transform[0] = a;\n transform[1] = b;\n transform[2] = c;\n transform[3] = d;\n transform[4] = e;\n transform[5] = f;\n return transform;\n}\n\n/**\n * Set transform on one matrix from another matrix.\n * @param {!Transform} transform1 Matrix to set transform to.\n * @param {!Transform} transform2 Matrix to set transform from.\n * @return {!Transform} transform1 with transform from transform2 applied.\n */\nexport function setFromArray(transform1, transform2) {\n transform1[0] = transform2[0];\n transform1[1] = transform2[1];\n transform1[2] = transform2[2];\n transform1[3] = transform2[3];\n transform1[4] = transform2[4];\n transform1[5] = transform2[5];\n return transform1;\n}\n\n/**\n * Transforms the given coordinate with the given transform returning the\n * resulting, transformed coordinate. The coordinate will be modified in-place.\n *\n * @param {Transform} transform The transformation.\n * @param {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} coordinate The coordinate to transform.\n * @return {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} return coordinate so that operations can be\n * chained together.\n */\nexport function apply(transform, coordinate) {\n const x = coordinate[0];\n const y = coordinate[1];\n coordinate[0] = transform[0] * x + transform[2] * y + transform[4];\n coordinate[1] = transform[1] * x + transform[3] * y + transform[5];\n return coordinate;\n}\n\n/**\n * Applies rotation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} angle Angle in radians.\n * @return {!Transform} The rotated transform.\n */\nexport function rotate(transform, angle) {\n const cos = Math.cos(angle);\n const sin = Math.sin(angle);\n return multiply(transform, set(tmp_, cos, sin, -sin, cos, 0, 0));\n}\n\n/**\n * Applies scale to a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} x Scale factor x.\n * @param {number} y Scale factor y.\n * @return {!Transform} The scaled transform.\n */\nexport function scale(transform, x, y) {\n return multiply(transform, set(tmp_, x, 0, 0, y, 0, 0));\n}\n\n/**\n * Creates a scale transform.\n * @param {!Transform} target Transform to overwrite.\n * @param {number} x Scale factor x.\n * @param {number} y Scale factor y.\n * @return {!Transform} The scale transform.\n */\nexport function makeScale(target, x, y) {\n return set(target, x, 0, 0, y, 0, 0);\n}\n\n/**\n * Applies translation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} dx Translation x.\n * @param {number} dy Translation y.\n * @return {!Transform} The translated transform.\n */\nexport function translate(transform, dx, dy) {\n return multiply(transform, set(tmp_, 1, 0, 0, 1, dx, dy));\n}\n\n/**\n * Creates a composite transform given an initial translation, scale, rotation, and\n * final translation (in that order only, not commutative).\n * @param {!Transform} transform The transform (will be modified in place).\n * @param {number} dx1 Initial translation x.\n * @param {number} dy1 Initial translation y.\n * @param {number} sx Scale factor x.\n * @param {number} sy Scale factor y.\n * @param {number} angle Rotation (in counter-clockwise radians).\n * @param {number} dx2 Final translation x.\n * @param {number} dy2 Final translation y.\n * @return {!Transform} The composite transform.\n */\nexport function compose(transform, dx1, dy1, sx, sy, angle, dx2, dy2) {\n const sin = Math.sin(angle);\n const cos = Math.cos(angle);\n transform[0] = sx * cos;\n transform[1] = sy * sin;\n transform[2] = -sx * sin;\n transform[3] = sy * cos;\n transform[4] = dx2 * sx * cos - dy2 * sx * sin + dx1;\n transform[5] = dx2 * sy * sin + dy2 * sy * cos + dy1;\n return transform;\n}\n\n/**\n * Creates a composite transform given an initial translation, scale, rotation, and\n * final translation (in that order only, not commutative). The resulting transform\n * string can be applied as `transform` property of an HTMLElement's style.\n * @param {number} dx1 Initial translation x.\n * @param {number} dy1 Initial translation y.\n * @param {number} sx Scale factor x.\n * @param {number} sy Scale factor y.\n * @param {number} angle Rotation (in counter-clockwise radians).\n * @param {number} dx2 Final translation x.\n * @param {number} dy2 Final translation y.\n * @return {string} The composite css transform.\n * @api\n */\nexport function composeCssTransform(dx1, dy1, sx, sy, angle, dx2, dy2) {\n return toString(compose(create(), dx1, dy1, sx, sy, angle, dx2, dy2));\n}\n\n/**\n * Invert the given transform.\n * @param {!Transform} source The source transform to invert.\n * @return {!Transform} The inverted (source) transform.\n */\nexport function invert(source) {\n return makeInverse(source, source);\n}\n\n/**\n * Invert the given transform.\n * @param {!Transform} target Transform to be set as the inverse of\n * the source transform.\n * @param {!Transform} source The source transform to invert.\n * @return {!Transform} The inverted (target) transform.\n */\nexport function makeInverse(target, source) {\n const det = determinant(source);\n assert(det !== 0, 'Transformation matrix cannot be inverted');\n\n const a = source[0];\n const b = source[1];\n const c = source[2];\n const d = source[3];\n const e = source[4];\n const f = source[5];\n\n target[0] = d / det;\n target[1] = -b / det;\n target[2] = -c / det;\n target[3] = a / det;\n target[4] = (c * f - d * e) / det;\n target[5] = -(a * f - b * e) / det;\n\n return target;\n}\n\n/**\n * Returns the determinant of the given matrix.\n * @param {!Transform} mat Matrix.\n * @return {number} Determinant.\n */\nexport function determinant(mat) {\n return mat[0] * mat[3] - mat[1] * mat[2];\n}\n\n/**\n * @type {Array}\n */\nconst matrixPrecision = [1e5, 1e5, 1e5, 1e5, 2, 2];\n\n/**\n * A matrix string version of the transform. This can be used\n * for CSS transforms.\n * @param {!Transform} mat Matrix.\n * @return {string} The transform as a string.\n */\nexport function toString(mat) {\n const transformString = 'matrix(' + mat.join(', ') + ')';\n return transformString;\n}\n\n/**\n * Create a transform from a CSS transform matrix string.\n * @param {string} cssTransform The CSS string to parse.\n * @return {!Transform} The transform.\n */\nexport function fromString(cssTransform) {\n const values = cssTransform.substring(7, cssTransform.length - 1).split(',');\n return values.map(parseFloat);\n}\n\n/**\n * Compare two matrices for equality.\n * @param {!string} cssTransform1 A CSS transform matrix string.\n * @param {!string} cssTransform2 A CSS transform matrix string.\n * @return {boolean} The two matrices are equal.\n */\nexport function equivalent(cssTransform1, cssTransform2) {\n const mat1 = fromString(cssTransform1);\n const mat2 = fromString(cssTransform2);\n for (let i = 0; i < 6; ++i) {\n if (Math.round((mat1[i] - mat2[i]) * matrixPrecision[i]) !== 0) {\n return false;\n }\n }\n return true;\n}\n","/**\n * @module ol/geom/flat/transform\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n * @param {Array} [dest] Destination.\n * @param {number} [destinationStride] Stride of destination coordinates; if unspecified, assumed to be 2.\n * @return {Array} Transformed coordinates.\n */\nexport function transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n transform,\n dest,\n destinationStride,\n) {\n dest = dest ? dest : [];\n destinationStride = destinationStride ? destinationStride : 2;\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const x = flatCoordinates[j];\n const y = flatCoordinates[j + 1];\n dest[i++] = transform[0] * x + transform[2] * y + transform[4];\n dest[i++] = transform[1] * x + transform[3] * y + transform[5];\n\n for (let k = 2; k < destinationStride; k++) {\n dest[i++] = flatCoordinates[j + k];\n }\n }\n\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} angle Angle.\n * @param {Array} anchor Rotation anchor point.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed coordinates.\n */\nexport function rotate(\n flatCoordinates,\n offset,\n end,\n stride,\n angle,\n anchor,\n dest,\n) {\n dest = dest ? dest : [];\n const cos = Math.cos(angle);\n const sin = Math.sin(angle);\n const anchorX = anchor[0];\n const anchorY = anchor[1];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const deltaX = flatCoordinates[j] - anchorX;\n const deltaY = flatCoordinates[j + 1] - anchorY;\n dest[i++] = anchorX + deltaX * cos - deltaY * sin;\n dest[i++] = anchorY + deltaX * sin + deltaY * cos;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n/**\n * Scale the coordinates.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} sx Scale factor in the x-direction.\n * @param {number} sy Scale factor in the y-direction.\n * @param {Array} anchor Scale anchor point.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed coordinates.\n */\nexport function scale(\n flatCoordinates,\n offset,\n end,\n stride,\n sx,\n sy,\n anchor,\n dest,\n) {\n dest = dest ? dest : [];\n const anchorX = anchor[0];\n const anchorY = anchor[1];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const deltaX = flatCoordinates[j] - anchorX;\n const deltaY = flatCoordinates[j + 1] - anchorY;\n dest[i++] = anchorX + sx * deltaX;\n dest[i++] = anchorY + sy * deltaY;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed coordinates.\n */\nexport function translate(\n flatCoordinates,\n offset,\n end,\n stride,\n deltaX,\n deltaY,\n dest,\n) {\n dest = dest ? dest : [];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n dest[i++] = flatCoordinates[j] + deltaX;\n dest[i++] = flatCoordinates[j + 1] + deltaY;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n","/**\n * @module ol/geom/Geometry\n */\nimport BaseObject from '../Object.js';\nimport {\n createEmpty,\n createOrUpdateEmpty,\n getHeight,\n returnOrUpdate,\n} from '../extent.js';\nimport {memoizeOne} from '../functions.js';\nimport {get as getProjection, getTransform} from '../proj.js';\nimport {\n compose as composeTransform,\n create as createTransform,\n} from '../transform.js';\nimport {abstract} from '../util.js';\nimport {transform2D} from './flat/transform.js';\n\n/**\n * @typedef {'XY' | 'XYZ' | 'XYM' | 'XYZM'} GeometryLayout\n * The coordinate layout for geometries, indicating whether a 3rd or 4th z ('Z')\n * or measure ('M') coordinate is available.\n */\n\n/**\n * @typedef {'Point' | 'LineString' | 'LinearRing' | 'Polygon' | 'MultiPoint' | 'MultiLineString' | 'MultiPolygon' | 'GeometryCollection' | 'Circle'} Type\n * The geometry type. One of `'Point'`, `'LineString'`, `'LinearRing'`,\n * `'Polygon'`, `'MultiPoint'`, `'MultiLineString'`, `'MultiPolygon'`,\n * `'GeometryCollection'`, or `'Circle'`.\n */\n\n/**\n * @type {import(\"../transform.js\").Transform}\n */\nconst tmpTransform = createTransform();\n\n/** @type {import('../coordinate.js').Coordinate} */\nconst tmpPoint = [NaN, NaN];\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for vector geometries.\n *\n * To get notified of changes to the geometry, register a listener for the\n * generic `change` event on your geometry instance.\n *\n * @abstract\n * @api\n */\nclass Geometry extends BaseObject {\n constructor() {\n super();\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent}\n */\n this.extent_ = createEmpty();\n\n /**\n * @private\n * @type {number}\n */\n this.extentRevision_ = -1;\n\n /**\n * @protected\n * @type {number}\n */\n this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n\n /**\n * @protected\n * @type {number}\n */\n this.simplifiedGeometryRevision = 0;\n\n /**\n * Get a transformed and simplified version of the geometry.\n * @abstract\n * @param {number} revision The geometry revision.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @return {Geometry} Simplified geometry.\n */\n this.simplifyTransformedInternal = memoizeOne(\n (revision, squaredTolerance, transform) => {\n if (!transform) {\n return this.getSimplifiedGeometry(squaredTolerance);\n }\n const clone = this.clone();\n clone.applyTransform(transform);\n return clone.getSimplifiedGeometry(squaredTolerance);\n },\n );\n }\n\n /**\n * Get a transformed and simplified version of the geometry.\n * @abstract\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @return {Geometry} Simplified geometry.\n */\n simplifyTransformed(squaredTolerance, transform) {\n return this.simplifyTransformedInternal(\n this.getRevision(),\n squaredTolerance,\n transform,\n );\n }\n\n /**\n * Make a complete copy of the geometry.\n * @abstract\n * @return {!Geometry} Clone.\n */\n clone() {\n return abstract();\n }\n\n /**\n * @abstract\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n return abstract();\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\n containsXY(x, y) {\n return this.closestPointXY(x, y, tmpPoint, Number.MIN_VALUE) === 0;\n }\n\n /**\n * Return the closest point of the geometry to the passed point as\n * {@link module:ol/coordinate~Coordinate coordinate}.\n * @param {import(\"../coordinate.js\").Coordinate} point Point.\n * @param {import(\"../coordinate.js\").Coordinate} [closestPoint] Closest point.\n * @return {import(\"../coordinate.js\").Coordinate} Closest point.\n * @api\n */\n getClosestPoint(point, closestPoint) {\n closestPoint = closestPoint ? closestPoint : [NaN, NaN];\n this.closestPointXY(point[0], point[1], closestPoint, Infinity);\n return closestPoint;\n }\n\n /**\n * Returns true if this geometry includes the specified coordinate. If the\n * coordinate is on the boundary of the geometry, returns false.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} Contains coordinate.\n * @api\n */\n intersectsCoordinate(coordinate) {\n return this.containsXY(coordinate[0], coordinate[1]);\n }\n\n /**\n * @abstract\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @protected\n * @return {import(\"../extent.js\").Extent} extent Extent.\n */\n computeExtent(extent) {\n return abstract();\n }\n\n /**\n * Get the extent of the geometry.\n * @param {import(\"../extent.js\").Extent} [extent] Extent.\n * @return {import(\"../extent.js\").Extent} extent Extent.\n * @api\n */\n getExtent(extent) {\n if (this.extentRevision_ != this.getRevision()) {\n const extent = this.computeExtent(this.extent_);\n if (isNaN(extent[0]) || isNaN(extent[1])) {\n createOrUpdateEmpty(extent);\n }\n this.extentRevision_ = this.getRevision();\n }\n return returnOrUpdate(this.extent_, extent);\n }\n\n /**\n * Rotate the geometry around a given coordinate. This modifies the geometry\n * coordinates in place.\n * @abstract\n * @param {number} angle Rotation angle in radians.\n * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n * @api\n */\n rotate(angle, anchor) {\n abstract();\n }\n\n /**\n * Scale the geometry (with an optional origin). This modifies the geometry\n * coordinates in place.\n * @abstract\n * @param {number} sx The scaling factor in the x-direction.\n * @param {number} [sy] The scaling factor in the y-direction (defaults to sx).\n * @param {import(\"../coordinate.js\").Coordinate} [anchor] The scale origin (defaults to the center\n * of the geometry extent).\n * @api\n */\n scale(sx, sy, anchor) {\n abstract();\n }\n\n /**\n * Create a simplified version of this geometry. For linestrings, this uses\n * the [Douglas Peucker](https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm)\n * algorithm. For polygons, a quantization-based\n * simplification is used to preserve topology.\n * @param {number} tolerance The tolerance distance for simplification.\n * @return {Geometry} A new, simplified version of the original geometry.\n * @api\n */\n simplify(tolerance) {\n return this.getSimplifiedGeometry(tolerance * tolerance);\n }\n\n /**\n * Create a simplified version of this geometry using the Douglas Peucker\n * algorithm.\n * See https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm.\n * @abstract\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Geometry} Simplified geometry.\n */\n getSimplifiedGeometry(squaredTolerance) {\n return abstract();\n }\n\n /**\n * Get the type of this geometry.\n * @abstract\n * @return {Type} Geometry type.\n */\n getType() {\n return abstract();\n }\n\n /**\n * Apply a transform function to the coordinates of the geometry.\n * The geometry is modified in place.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n * @abstract\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform function.\n * Called with a flat array of geometry coordinates.\n */\n applyTransform(transformFn) {\n abstract();\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @abstract\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n */\n intersectsExtent(extent) {\n return abstract();\n }\n\n /**\n * Translate the geometry. This modifies the geometry coordinates in place. If\n * instead you want a new geometry, first `clone()` this geometry.\n * @abstract\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @api\n */\n translate(deltaX, deltaY) {\n abstract();\n }\n\n /**\n * Transform each coordinate of the geometry from one coordinate reference\n * system to another. The geometry is modified in place.\n * For example, a line will be transformed to a line and a circle to a circle.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n *\n * @param {import(\"../proj.js\").ProjectionLike} source The current projection. Can be a\n * string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @param {import(\"../proj.js\").ProjectionLike} destination The desired projection. Can be a\n * string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @return {this} This geometry. Note that original geometry is\n * modified in place.\n * @api\n */\n transform(source, destination) {\n /** @type {import(\"../proj/Projection.js\").default} */\n const sourceProj = getProjection(source);\n const transformFn =\n sourceProj.getUnits() == 'tile-pixels'\n ? function (inCoordinates, outCoordinates, stride) {\n const pixelExtent = sourceProj.getExtent();\n const projectedExtent = sourceProj.getWorldExtent();\n const scale = getHeight(projectedExtent) / getHeight(pixelExtent);\n composeTransform(\n tmpTransform,\n projectedExtent[0],\n projectedExtent[3],\n scale,\n -scale,\n 0,\n 0,\n 0,\n );\n const transformed = transform2D(\n inCoordinates,\n 0,\n inCoordinates.length,\n stride,\n tmpTransform,\n outCoordinates,\n );\n const projTransform = getTransform(sourceProj, destination);\n if (projTransform) {\n return projTransform(transformed, transformed, stride);\n }\n return transformed;\n }\n : getTransform(sourceProj, destination);\n this.applyTransform(transformFn);\n return this;\n }\n}\n\nexport default Geometry;\n","/**\n * @module ol/geom/SimpleGeometry\n */\nimport {createOrUpdateFromFlatCoordinates, getCenter} from '../extent.js';\nimport {abstract} from '../util.js';\nimport Geometry from './Geometry.js';\nimport {rotate, scale, transform2D, translate} from './flat/transform.js';\n\n/**\n * @classdesc\n * Abstract base class; only used for creating subclasses; do not instantiate\n * in apps, as cannot be rendered.\n *\n * @abstract\n * @api\n */\nclass SimpleGeometry extends Geometry {\n constructor() {\n super();\n\n /**\n * @protected\n * @type {import(\"./Geometry.js\").GeometryLayout}\n */\n this.layout = 'XY';\n\n /**\n * @protected\n * @type {number}\n */\n this.stride = 2;\n\n /**\n * @protected\n * @type {Array}\n */\n this.flatCoordinates;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @protected\n * @return {import(\"../extent.js\").Extent} extent Extent.\n * @override\n */\n computeExtent(extent) {\n return createOrUpdateFromFlatCoordinates(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n extent,\n );\n }\n\n /**\n * @abstract\n * @return {Array<*> | null} Coordinates.\n */\n getCoordinates() {\n return abstract();\n }\n\n /**\n * Return the first coordinate of the geometry.\n * @return {import(\"../coordinate.js\").Coordinate} First coordinate.\n * @api\n */\n getFirstCoordinate() {\n return this.flatCoordinates.slice(0, this.stride);\n }\n\n /**\n * @return {Array} Flat coordinates.\n */\n getFlatCoordinates() {\n return this.flatCoordinates;\n }\n\n /**\n * Return the last coordinate of the geometry.\n * @return {import(\"../coordinate.js\").Coordinate} Last point.\n * @api\n */\n getLastCoordinate() {\n return this.flatCoordinates.slice(\n this.flatCoordinates.length - this.stride,\n );\n }\n\n /**\n * Return the {@link import(\"./Geometry.js\").GeometryLayout layout} of the geometry.\n * @return {import(\"./Geometry.js\").GeometryLayout} Layout.\n * @api\n */\n getLayout() {\n return this.layout;\n }\n\n /**\n * Create a simplified version of this geometry using the Douglas Peucker algorithm.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {SimpleGeometry} Simplified geometry.\n * @override\n */\n getSimplifiedGeometry(squaredTolerance) {\n if (this.simplifiedGeometryRevision !== this.getRevision()) {\n this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n this.simplifiedGeometryRevision = this.getRevision();\n }\n // If squaredTolerance is negative or if we know that simplification will not\n // have any effect then just return this.\n if (\n squaredTolerance < 0 ||\n (this.simplifiedGeometryMaxMinSquaredTolerance !== 0 &&\n squaredTolerance <= this.simplifiedGeometryMaxMinSquaredTolerance)\n ) {\n return this;\n }\n\n const simplifiedGeometry =\n this.getSimplifiedGeometryInternal(squaredTolerance);\n const simplifiedFlatCoordinates = simplifiedGeometry.getFlatCoordinates();\n if (simplifiedFlatCoordinates.length < this.flatCoordinates.length) {\n return simplifiedGeometry;\n }\n // Simplification did not actually remove any coordinates. We now know\n // that any calls to getSimplifiedGeometry with a squaredTolerance less\n // than or equal to the current squaredTolerance will also not have any\n // effect. This allows us to short circuit simplification (saving CPU\n // cycles) and prevents the cache of simplified geometries from filling\n // up with useless identical copies of this geometry (saving memory).\n this.simplifiedGeometryMaxMinSquaredTolerance = squaredTolerance;\n return this;\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {SimpleGeometry} Simplified geometry.\n * @protected\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n return this;\n }\n\n /**\n * @return {number} Stride.\n */\n getStride() {\n return this.stride;\n }\n\n /**\n * @param {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n * @param {Array} flatCoordinates Flat coordinates.\n */\n setFlatCoordinates(layout, flatCoordinates) {\n this.stride = getStrideForLayout(layout);\n this.layout = layout;\n this.flatCoordinates = flatCoordinates;\n }\n\n /**\n * @abstract\n * @param {!Array<*>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n setCoordinates(coordinates, layout) {\n abstract();\n }\n\n /**\n * @param {import(\"./Geometry.js\").GeometryLayout|undefined} layout Layout.\n * @param {Array<*>} coordinates Coordinates.\n * @param {number} nesting Nesting.\n * @protected\n */\n setLayout(layout, coordinates, nesting) {\n let stride;\n if (layout) {\n stride = getStrideForLayout(layout);\n } else {\n for (let i = 0; i < nesting; ++i) {\n if (coordinates.length === 0) {\n this.layout = 'XY';\n this.stride = 2;\n return;\n }\n coordinates = /** @type {Array} */ (coordinates[0]);\n }\n stride = coordinates.length;\n layout = getLayoutForStride(stride);\n }\n this.layout = layout;\n this.stride = stride;\n }\n\n /**\n * Apply a transform function to the coordinates of the geometry.\n * The geometry is modified in place.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform function.\n * Called with a flat array of geometry coordinates.\n * @api\n * @override\n */\n applyTransform(transformFn) {\n if (this.flatCoordinates) {\n transformFn(\n this.flatCoordinates,\n this.flatCoordinates,\n this.layout.startsWith('XYZ') ? 3 : 2,\n this.stride,\n );\n this.changed();\n }\n }\n\n /**\n * Rotate the geometry around a given coordinate. This modifies the geometry\n * coordinates in place.\n * @param {number} angle Rotation angle in counter-clockwise radians.\n * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n * @api\n * @override\n */\n rotate(angle, anchor) {\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n rotate(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n angle,\n anchor,\n flatCoordinates,\n );\n this.changed();\n }\n }\n\n /**\n * Scale the geometry (with an optional origin). This modifies the geometry\n * coordinates in place.\n * @param {number} sx The scaling factor in the x-direction.\n * @param {number} [sy] The scaling factor in the y-direction (defaults to sx).\n * @param {import(\"../coordinate.js\").Coordinate} [anchor] The scale origin (defaults to the center\n * of the geometry extent).\n * @api\n * @override\n */\n scale(sx, sy, anchor) {\n if (sy === undefined) {\n sy = sx;\n }\n if (!anchor) {\n anchor = getCenter(this.getExtent());\n }\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n scale(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n sx,\n sy,\n anchor,\n flatCoordinates,\n );\n this.changed();\n }\n }\n\n /**\n * Translate the geometry. This modifies the geometry coordinates in place. If\n * instead you want a new geometry, first `clone()` this geometry.\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @api\n * @override\n */\n translate(deltaX, deltaY) {\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n translate(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n deltaX,\n deltaY,\n flatCoordinates,\n );\n this.changed();\n }\n }\n}\n\n/**\n * @param {number} stride Stride.\n * @return {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n */\nexport function getLayoutForStride(stride) {\n let layout;\n if (stride == 2) {\n layout = 'XY';\n } else if (stride == 3) {\n layout = 'XYZ';\n } else if (stride == 4) {\n layout = 'XYZM';\n }\n return /** @type {import(\"./Geometry.js\").GeometryLayout} */ (layout);\n}\n\n/**\n * @param {import(\"./Geometry.js\").GeometryLayout} layout Layout.\n * @return {number} Stride.\n */\nexport function getStrideForLayout(layout) {\n let stride;\n if (layout == 'XY') {\n stride = 2;\n } else if (layout == 'XYZ' || layout == 'XYM') {\n stride = 3;\n } else if (layout == 'XYZM') {\n stride = 4;\n }\n return /** @type {number} */ (stride);\n}\n\n/**\n * @param {SimpleGeometry} simpleGeometry Simple geometry.\n * @param {import(\"../transform.js\").Transform} transform Transform.\n * @param {Array} [dest] Destination.\n * @return {Array} Transformed flat coordinates.\n */\nexport function transformGeom2D(simpleGeometry, transform, dest) {\n const flatCoordinates = simpleGeometry.getFlatCoordinates();\n if (!flatCoordinates) {\n return null;\n }\n const stride = simpleGeometry.getStride();\n return transform2D(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n stride,\n transform,\n dest,\n );\n}\n\nexport default SimpleGeometry;\n","/**\n * @module ol/geom/flat/area\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRing(flatCoordinates, offset, end, stride) {\n let twiceArea = 0;\n const x0 = flatCoordinates[end - stride];\n const y0 = flatCoordinates[end - stride + 1];\n let dx1 = 0;\n let dy1 = 0;\n for (; offset < end; offset += stride) {\n const dx2 = flatCoordinates[offset] - x0;\n const dy2 = flatCoordinates[offset + 1] - y0;\n twiceArea += dy1 * dx2 - dx1 * dy2;\n dx1 = dx2;\n dy1 = dy2;\n }\n return twiceArea / 2;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRings(flatCoordinates, offset, ends, stride) {\n let area = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n area += linearRing(flatCoordinates, offset, end, stride);\n offset = end;\n }\n return area;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n let area = 0;\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n area += linearRings(flatCoordinates, offset, ends, stride);\n offset = ends[ends.length - 1];\n }\n return area;\n}\n","/**\n * @module ol/geom/flat/closest\n */\nimport {lerp, squaredDistance as squaredDx} from '../../math.js';\n\n/**\n * Returns the point on the 2D line segment flatCoordinates[offset1] to\n * flatCoordinates[offset2] that is closest to the point (x, y). Extra\n * dimensions are linearly interpolated.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset1 Offset 1.\n * @param {number} offset2 Offset 2.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n */\nfunction assignClosest(\n flatCoordinates,\n offset1,\n offset2,\n stride,\n x,\n y,\n closestPoint,\n) {\n const x1 = flatCoordinates[offset1];\n const y1 = flatCoordinates[offset1 + 1];\n const dx = flatCoordinates[offset2] - x1;\n const dy = flatCoordinates[offset2 + 1] - y1;\n let offset;\n if (dx === 0 && dy === 0) {\n offset = offset1;\n } else {\n const t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n if (t > 1) {\n offset = offset2;\n } else if (t > 0) {\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = lerp(\n flatCoordinates[offset1 + i],\n flatCoordinates[offset2 + i],\n t,\n );\n }\n closestPoint.length = stride;\n return;\n } else {\n offset = offset1;\n }\n }\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[offset + i];\n }\n closestPoint.length = stride;\n}\n\n/**\n * Return the squared of the largest distance between any pair of consecutive\n * coordinates.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function maxSquaredDelta(flatCoordinates, offset, end, stride, max) {\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n for (offset += stride; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n const squaredDelta = squaredDx(x1, y1, x2, y2);\n if (squaredDelta > max) {\n max = squaredDelta;\n }\n x1 = x2;\n y1 = y2;\n }\n return max;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function arrayMaxSquaredDelta(\n flatCoordinates,\n offset,\n ends,\n stride,\n max,\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n max = maxSquaredDelta(flatCoordinates, offset, end, stride, max);\n offset = end;\n }\n return max;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function multiArrayMaxSquaredDelta(\n flatCoordinates,\n offset,\n endss,\n stride,\n max,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n max = arrayMaxSquaredDelta(flatCoordinates, offset, ends, stride, max);\n offset = ends[ends.length - 1];\n }\n return max;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestPoint(\n flatCoordinates,\n offset,\n end,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint,\n) {\n if (offset == end) {\n return minSquaredDistance;\n }\n let i, squaredDistance;\n if (maxDelta === 0) {\n // All points are identical, so just test the first point.\n squaredDistance = squaredDx(\n x,\n y,\n flatCoordinates[offset],\n flatCoordinates[offset + 1],\n );\n if (squaredDistance < minSquaredDistance) {\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[offset + i];\n }\n closestPoint.length = stride;\n return squaredDistance;\n }\n return minSquaredDistance;\n }\n tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n let index = offset + stride;\n while (index < end) {\n assignClosest(\n flatCoordinates,\n index - stride,\n index,\n stride,\n x,\n y,\n tmpPoint,\n );\n squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n if (squaredDistance < minSquaredDistance) {\n minSquaredDistance = squaredDistance;\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = tmpPoint[i];\n }\n closestPoint.length = stride;\n index += stride;\n } else {\n // Skip ahead multiple points, because we know that all the skipped\n // points cannot be any closer than the closest point we have found so\n // far. We know this because we know how close the current point is, how\n // close the closest point we have found so far is, and the maximum\n // distance between consecutive points. For example, if we're currently\n // at distance 10, the best we've found so far is 3, and that the maximum\n // distance between consecutive points is 2, then we'll need to skip at\n // least (10 - 3) / 2 == 3 (rounded down) points to have any chance of\n // finding a closer point. We use Math.max(..., 1) to ensure that we\n // always advance at least one point, to avoid an infinite loop.\n index +=\n stride *\n Math.max(\n ((Math.sqrt(squaredDistance) - Math.sqrt(minSquaredDistance)) /\n maxDelta) |\n 0,\n 1,\n );\n }\n }\n if (isRing) {\n // Check the closing segment.\n assignClosest(\n flatCoordinates,\n end - stride,\n offset,\n stride,\n x,\n y,\n tmpPoint,\n );\n squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n if (squaredDistance < minSquaredDistance) {\n minSquaredDistance = squaredDistance;\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = tmpPoint[i];\n }\n closestPoint.length = stride;\n }\n }\n return minSquaredDistance;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestArrayPoint(\n flatCoordinates,\n offset,\n ends,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint,\n) {\n tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n minSquaredDistance = assignClosestPoint(\n flatCoordinates,\n offset,\n end,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint,\n );\n offset = end;\n }\n return minSquaredDistance;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array} [tmpPoint] Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestMultiArrayPoint(\n flatCoordinates,\n offset,\n endss,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint,\n) {\n tmpPoint = tmpPoint ? tmpPoint : [NaN, NaN];\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n minSquaredDistance = assignClosestArrayPoint(\n flatCoordinates,\n offset,\n ends,\n stride,\n maxDelta,\n isRing,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n tmpPoint,\n );\n offset = ends[ends.length - 1];\n }\n return minSquaredDistance;\n}\n","/**\n * @module ol/geom/flat/deflate\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinate(flatCoordinates, offset, coordinate, stride) {\n for (let i = 0, ii = coordinate.length; i < ii; ++i) {\n flatCoordinates[offset++] = coordinate[i];\n }\n return offset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} coordinates Coordinates.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinates(\n flatCoordinates,\n offset,\n coordinates,\n stride,\n) {\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n const coordinate = coordinates[i];\n for (let j = 0; j < stride; ++j) {\n flatCoordinates[offset++] = coordinate[j];\n }\n }\n return offset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} coordinatess Coordinatess.\n * @param {number} stride Stride.\n * @param {Array} [ends] Ends.\n * @return {Array} Ends.\n */\nexport function deflateCoordinatesArray(\n flatCoordinates,\n offset,\n coordinatess,\n stride,\n ends,\n) {\n ends = ends ? ends : [];\n let i = 0;\n for (let j = 0, jj = coordinatess.length; j < jj; ++j) {\n const end = deflateCoordinates(\n flatCoordinates,\n offset,\n coordinatess[j],\n stride,\n );\n ends[i++] = end;\n offset = end;\n }\n ends.length = i;\n return ends;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>>} coordinatesss Coordinatesss.\n * @param {number} stride Stride.\n * @param {Array>} [endss] Endss.\n * @return {Array>} Endss.\n */\nexport function deflateMultiCoordinatesArray(\n flatCoordinates,\n offset,\n coordinatesss,\n stride,\n endss,\n) {\n endss = endss ? endss : [];\n let i = 0;\n for (let j = 0, jj = coordinatesss.length; j < jj; ++j) {\n const ends = deflateCoordinatesArray(\n flatCoordinates,\n offset,\n coordinatesss[j],\n stride,\n endss[i],\n );\n if (ends.length === 0) {\n ends[0] = offset;\n }\n endss[i++] = ends;\n offset = ends[ends.length - 1];\n }\n endss.length = i;\n return endss;\n}\n","/**\n * @module ol/geom/flat/inflate\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Array} [coordinates] Coordinates.\n * @return {Array} Coordinates.\n */\nexport function inflateCoordinates(\n flatCoordinates,\n offset,\n end,\n stride,\n coordinates,\n) {\n coordinates = coordinates !== undefined ? coordinates : [];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n coordinates[i++] = flatCoordinates.slice(j, j + stride);\n }\n coordinates.length = i;\n return coordinates;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {Array>} [coordinatess] Coordinatess.\n * @return {Array>} Coordinatess.\n */\nexport function inflateCoordinatesArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n coordinatess,\n) {\n coordinatess = coordinatess !== undefined ? coordinatess : [];\n let i = 0;\n for (let j = 0, jj = ends.length; j < jj; ++j) {\n const end = ends[j];\n coordinatess[i++] = inflateCoordinates(\n flatCoordinates,\n offset,\n end,\n stride,\n coordinatess[i],\n );\n offset = end;\n }\n coordinatess.length = i;\n return coordinatess;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array>>} [coordinatesss]\n * Coordinatesss.\n * @return {Array>>} Coordinatesss.\n */\nexport function inflateMultiCoordinatesArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n coordinatesss,\n) {\n coordinatesss = coordinatesss !== undefined ? coordinatesss : [];\n let i = 0;\n for (let j = 0, jj = endss.length; j < jj; ++j) {\n const ends = endss[j];\n coordinatesss[i++] =\n ends.length === 1 && ends[0] === offset\n ? []\n : inflateCoordinatesArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n coordinatesss[i],\n );\n offset = ends[ends.length - 1];\n }\n coordinatesss.length = i;\n return coordinatesss;\n}\n","/**\n * @module ol/geom/flat/simplify\n */\n// Based on simplify-js https://github.com/mourner/simplify-js\n// Copyright (c) 2012, Vladimir Agafonkin\n// All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are met:\n//\n// 1. Redistributions of source code must retain the above copyright notice,\n// this list of conditions and the following disclaimer.\n//\n// 2. Redistributions in binary form must reproduce the above copyright\n// notice, this list of conditions and the following disclaimer in the\n// documentation and/or other materials provided with the distribution.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE\n// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\n// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\n// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\n// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\n// POSSIBILITY OF SUCH DAMAGE.\n\nimport {squaredDistance, squaredSegmentDistance} from '../../math.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {boolean} highQuality Highest quality.\n * @param {Array} [simplifiedFlatCoordinates] Simplified flat\n * coordinates.\n * @return {Array} Simplified line string.\n */\nexport function simplifyLineString(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n highQuality,\n simplifiedFlatCoordinates,\n) {\n simplifiedFlatCoordinates =\n simplifiedFlatCoordinates !== undefined ? simplifiedFlatCoordinates : [];\n if (!highQuality) {\n end = radialDistance(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n );\n flatCoordinates = simplifiedFlatCoordinates;\n offset = 0;\n stride = 2;\n }\n simplifiedFlatCoordinates.length = douglasPeucker(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n );\n return simplifiedFlatCoordinates;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function douglasPeucker(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n) {\n const n = (end - offset) / stride;\n if (n < 3) {\n for (; offset < end; offset += stride) {\n simplifiedFlatCoordinates[simplifiedOffset++] = flatCoordinates[offset];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + 1];\n }\n return simplifiedOffset;\n }\n /** @type {Array} */\n const markers = new Array(n);\n markers[0] = 1;\n markers[n - 1] = 1;\n /** @type {Array} */\n const stack = [offset, end - stride];\n let index = 0;\n while (stack.length > 0) {\n const last = stack.pop();\n const first = stack.pop();\n let maxSquaredDistance = 0;\n const x1 = flatCoordinates[first];\n const y1 = flatCoordinates[first + 1];\n const x2 = flatCoordinates[last];\n const y2 = flatCoordinates[last + 1];\n for (let i = first + stride; i < last; i += stride) {\n const x = flatCoordinates[i];\n const y = flatCoordinates[i + 1];\n const squaredDistance = squaredSegmentDistance(x, y, x1, y1, x2, y2);\n if (squaredDistance > maxSquaredDistance) {\n index = i;\n maxSquaredDistance = squaredDistance;\n }\n }\n if (maxSquaredDistance > squaredTolerance) {\n markers[(index - offset) / stride] = 1;\n if (first + stride < index) {\n stack.push(first, index);\n }\n if (index + stride < last) {\n stack.push(index, last);\n }\n }\n }\n for (let i = 0; i < n; ++i) {\n if (markers[i]) {\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + i * stride];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + i * stride + 1];\n }\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds,\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n simplifiedOffset = douglasPeucker(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n );\n simplifiedEnds.push(simplifiedOffset);\n offset = end;\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEndss,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n /** @type {Array} */\n const simplifiedEnds = [];\n simplifiedOffset = douglasPeuckerArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds,\n );\n simplifiedEndss.push(simplifiedEnds);\n offset = ends[ends.length - 1];\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function radialDistance(\n flatCoordinates,\n offset,\n end,\n stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n) {\n if (end <= offset + stride) {\n // zero or one point, no simplification possible, so copy and return\n for (; offset < end; offset += stride) {\n simplifiedFlatCoordinates[simplifiedOffset++] = flatCoordinates[offset];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + 1];\n }\n return simplifiedOffset;\n }\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n // copy first point\n simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n let x2 = x1;\n let y2 = y1;\n for (offset += stride; offset < end; offset += stride) {\n x2 = flatCoordinates[offset];\n y2 = flatCoordinates[offset + 1];\n if (squaredDistance(x1, y1, x2, y2) > squaredTolerance) {\n // copy point at offset\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n x1 = x2;\n y1 = y2;\n }\n }\n if (x2 != x1 || y2 != y1) {\n // copy last point\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {number} value Value.\n * @param {number} tolerance Tolerance.\n * @return {number} Rounded value.\n */\nexport function snap(value, tolerance) {\n return tolerance * Math.round(value / tolerance);\n}\n\n/**\n * Simplifies a line string using an algorithm designed by Tim Schaub.\n * Coordinates are snapped to the nearest value in a virtual grid and\n * consecutive duplicate coordinates are discarded. This effectively preserves\n * topology as the simplification of any subsection of a line string is\n * independent of the rest of the line string. This means that, for examples,\n * the common edge between two polygons will be simplified to the same line\n * string independently in both polygons. This implementation uses a single\n * pass over the coordinates and eliminates intermediate collinear points.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function quantize(\n flatCoordinates,\n offset,\n end,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n) {\n // do nothing if the line is empty\n if (offset == end) {\n return simplifiedOffset;\n }\n // snap the first coordinate (P1)\n let x1 = snap(flatCoordinates[offset], tolerance);\n let y1 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n // add the first coordinate to the output\n simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n // find the next coordinate that does not snap to the same value as the first\n // coordinate (P2)\n let x2, y2;\n do {\n x2 = snap(flatCoordinates[offset], tolerance);\n y2 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n if (offset == end) {\n // all coordinates snap to the same value, the line collapses to a point\n // push the last snapped value anyway to ensure that the output contains\n // at least two points\n // FIXME should we really return at least two points anyway?\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n return simplifiedOffset;\n }\n } while (x2 == x1 && y2 == y1);\n while (offset < end) {\n // snap the next coordinate (P3)\n const x3 = snap(flatCoordinates[offset], tolerance);\n const y3 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n // skip P3 if it is equal to P2\n if (x3 == x2 && y3 == y2) {\n continue;\n }\n // calculate the delta between P1 and P2\n const dx1 = x2 - x1;\n const dy1 = y2 - y1;\n // calculate the delta between P3 and P1\n const dx2 = x3 - x1;\n const dy2 = y3 - y1;\n // if P1, P2, and P3 are colinear and P3 is further from P1 than P2 is from\n // P1 in the same direction then P2 is on the straight line between P1 and\n // P3\n if (\n dx1 * dy2 == dy1 * dx2 &&\n ((dx1 < 0 && dx2 < dx1) || dx1 == dx2 || (dx1 > 0 && dx2 > dx1)) &&\n ((dy1 < 0 && dy2 < dy1) || dy1 == dy2 || (dy1 > 0 && dy2 > dy1))\n ) {\n // discard P2 and set P2 = P3\n x2 = x3;\n y2 = y3;\n continue;\n }\n // either P1, P2, and P3 are not colinear, or they are colinear but P3 is\n // between P3 and P1 or on the opposite half of the line to P2. add P2,\n // and continue with P1 = P2 and P2 = P3\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n x1 = x2;\n y1 = y2;\n x2 = x3;\n y2 = y3;\n }\n // add the last point (P2)\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function quantizeArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds,\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n simplifiedOffset = quantize(\n flatCoordinates,\n offset,\n end,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n );\n simplifiedEnds.push(simplifiedOffset);\n offset = end;\n }\n return simplifiedOffset;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function quantizeMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEndss,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n /** @type {Array} */\n const simplifiedEnds = [];\n simplifiedOffset = quantizeArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n tolerance,\n simplifiedFlatCoordinates,\n simplifiedOffset,\n simplifiedEnds,\n );\n simplifiedEndss.push(simplifiedEnds);\n offset = ends[ends.length - 1];\n }\n return simplifiedOffset;\n}\n","/**\n * @module ol/geom/LinearRing\n */\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {linearRing as linearRingArea} from './flat/area.js';\nimport {assignClosestPoint, maxSquaredDelta} from './flat/closest.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {douglasPeucker} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Linear ring geometry. Only used as part of polygon; cannot be rendered\n * on its own.\n *\n * @api\n */\nclass LinearRing extends SimpleGeometry {\n /**\n * @param {Array|Array} coordinates Coordinates.\n * For internal use, flat coordinates in combination with `layout` are also accepted.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n constructor(coordinates, layout) {\n super();\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n if (layout !== undefined && !Array.isArray(coordinates[0])) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n } else {\n this.setCoordinates(\n /** @type {Array} */ (\n coordinates\n ),\n layout,\n );\n }\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!LinearRing} Clone.\n * @api\n * @override\n */\n clone() {\n return new LinearRing(this.flatCoordinates.slice(), this.layout);\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n maxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n 0,\n ),\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestPoint(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n this.maxDelta_,\n true,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n );\n }\n\n /**\n * Return the area of the linear ring on projected plane.\n * @return {number} Area (on projected plane).\n * @api\n */\n getArea() {\n return linearRingArea(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n );\n }\n\n /**\n * Return the coordinates of the linear ring.\n * @return {Array} Coordinates.\n * @api\n * @override\n */\n getCoordinates() {\n return inflateCoordinates(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n );\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {LinearRing} Simplified LinearRing.\n * @protected\n * @override\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n /** @type {Array} */\n const simplifiedFlatCoordinates = [];\n simplifiedFlatCoordinates.length = douglasPeucker(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n );\n return new LinearRing(simplifiedFlatCoordinates, 'XY');\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'LinearRing';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return false;\n }\n\n /**\n * Set the coordinates of the linear ring.\n * @param {!Array} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 1);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinates(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n );\n this.changed();\n }\n}\n\nexport default LinearRing;\n","/**\n * @module ol/geom/Point\n */\nimport {containsXY, createOrUpdateFromCoordinate} from '../extent.js';\nimport {squaredDistance as squaredDx} from '../math.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {deflateCoordinate} from './flat/deflate.js';\n\n/**\n * @classdesc\n * Point geometry.\n *\n * @api\n */\nclass Point extends SimpleGeometry {\n /**\n * @param {import(\"../coordinate.js\").Coordinate} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n constructor(coordinates, layout) {\n super();\n this.setCoordinates(coordinates, layout);\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!Point} Clone.\n * @api\n * @override\n */\n clone() {\n const point = new Point(this.flatCoordinates.slice(), this.layout);\n point.applyProperties(this);\n return point;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n const flatCoordinates = this.flatCoordinates;\n const squaredDistance = squaredDx(\n x,\n y,\n flatCoordinates[0],\n flatCoordinates[1],\n );\n if (squaredDistance < minSquaredDistance) {\n const stride = this.stride;\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[i];\n }\n closestPoint.length = stride;\n return squaredDistance;\n }\n return minSquaredDistance;\n }\n\n /**\n * Return the coordinate of the point.\n * @return {import(\"../coordinate.js\").Coordinate} Coordinates.\n * @api\n * @override\n */\n getCoordinates() {\n return this.flatCoordinates.slice();\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @protected\n * @return {import(\"../extent.js\").Extent} extent Extent.\n * @override\n */\n computeExtent(extent) {\n return createOrUpdateFromCoordinate(this.flatCoordinates, extent);\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'Point';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return containsXY(extent, this.flatCoordinates[0], this.flatCoordinates[1]);\n }\n\n /**\n * @param {!Array<*>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 0);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinate(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n );\n this.changed();\n }\n}\n\nexport default Point;\n","/**\n * @module ol/geom/flat/contains\n */\nimport {forEachCorner} from '../../extent.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} Contains extent.\n */\nexport function linearRingContainsExtent(\n flatCoordinates,\n offset,\n end,\n stride,\n extent,\n) {\n const outside = forEachCorner(\n extent,\n /**\n * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} Contains (x, y).\n */\n function (coordinate) {\n return !linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n coordinate[0],\n coordinate[1],\n );\n },\n );\n return !outside;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n x,\n y,\n) {\n // https://web.archive.org/web/20210504233957/http://geomalgorithms.com/a03-_inclusion.html\n // Copyright 2000 softSurfer, 2012 Dan Sunday\n // This code may be freely used and modified for any purpose\n // providing that this copyright notice is included with it.\n // SoftSurfer makes no warranty for this code, and cannot be held\n // liable for any real or imagined damage resulting from its use.\n // Users of this code must verify correctness for their application.\n let wn = 0;\n let x1 = flatCoordinates[end - stride];\n let y1 = flatCoordinates[end - stride + 1];\n for (; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n if (y1 <= y) {\n if (y2 > y && (x2 - x1) * (y - y1) - (x - x1) * (y2 - y1) > 0) {\n wn++;\n }\n } else if (y2 <= y && (x2 - x1) * (y - y1) - (x - x1) * (y2 - y1) < 0) {\n wn--;\n }\n x1 = x2;\n y1 = y2;\n }\n return wn !== 0;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingsContainsXY(\n flatCoordinates,\n offset,\n ends,\n stride,\n x,\n y,\n) {\n if (ends.length === 0) {\n return false;\n }\n if (!linearRingContainsXY(flatCoordinates, offset, ends[0], stride, x, y)) {\n return false;\n }\n for (let i = 1, ii = ends.length; i < ii; ++i) {\n if (\n linearRingContainsXY(flatCoordinates, ends[i - 1], ends[i], stride, x, y)\n ) {\n return false;\n }\n }\n return true;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingssContainsXY(\n flatCoordinates,\n offset,\n endss,\n stride,\n x,\n y,\n) {\n if (endss.length === 0) {\n return false;\n }\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n return true;\n }\n offset = ends[ends.length - 1];\n }\n return false;\n}\n","/**\n * @module ol/geom/flat/interiorpoint\n */\nimport {ascending} from '../../array.js';\nimport {linearRingsContainsXY} from './contains.js';\n\n/**\n * Calculates a point that is likely to lie in the interior of the linear rings.\n * Inspired by JTS's com.vividsolutions.jts.geom.Geometry#getInteriorPoint.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {Array} flatCenters Flat centers.\n * @param {number} flatCentersOffset Flat center offset.\n * @param {Array} [dest] Destination.\n * @return {Array} Destination point as XYM coordinate, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointOfArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n flatCenters,\n flatCentersOffset,\n dest,\n) {\n let i, ii, x, x1, x2, y1, y2;\n const y = flatCenters[flatCentersOffset + 1];\n /** @type {Array} */\n const intersections = [];\n // Calculate intersections with the horizontal line\n for (let r = 0, rr = ends.length; r < rr; ++r) {\n const end = ends[r];\n x1 = flatCoordinates[end - stride];\n y1 = flatCoordinates[end - stride + 1];\n for (i = offset; i < end; i += stride) {\n x2 = flatCoordinates[i];\n y2 = flatCoordinates[i + 1];\n if ((y <= y1 && y2 <= y) || (y1 <= y && y <= y2)) {\n x = ((y - y1) / (y2 - y1)) * (x2 - x1) + x1;\n intersections.push(x);\n }\n x1 = x2;\n y1 = y2;\n }\n }\n // Find the longest segment of the horizontal line that has its center point\n // inside the linear ring.\n let pointX = NaN;\n let maxSegmentLength = -Infinity;\n intersections.sort(ascending);\n x1 = intersections[0];\n for (i = 1, ii = intersections.length; i < ii; ++i) {\n x2 = intersections[i];\n const segmentLength = Math.abs(x2 - x1);\n if (segmentLength > maxSegmentLength) {\n x = (x1 + x2) / 2;\n if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n pointX = x;\n maxSegmentLength = segmentLength;\n }\n }\n x1 = x2;\n }\n if (isNaN(pointX)) {\n // There is no horizontal line that has its center point inside the linear\n // ring. Use the center of the the linear ring's extent.\n pointX = flatCenters[flatCentersOffset];\n }\n if (dest) {\n dest.push(pointX, y, maxSegmentLength);\n return dest;\n }\n return [pointX, y, maxSegmentLength];\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array} flatCenters Flat centers.\n * @return {Array} Interior points as XYM coordinates, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointsOfMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n flatCenters,\n) {\n /** @type {Array} */\n let interiorPoints = [];\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n interiorPoints = getInteriorPointOfArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n flatCenters,\n 2 * i,\n interiorPoints,\n );\n offset = ends[ends.length - 1];\n }\n return interiorPoints;\n}\n","/**\n * @module ol/geom/flat/segments\n */\n\n/**\n * This function calls `callback` for each segment of the flat coordinates\n * array. If the callback returns a truthy value the function returns that\n * value immediately. Otherwise the function returns `false`.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {function(import(\"../../coordinate.js\").Coordinate, import(\"../../coordinate.js\").Coordinate): T} callback Function\n * called for each segment.\n * @return {T|boolean} Value.\n * @template T\n */\nexport function forEach(flatCoordinates, offset, end, stride, callback) {\n let ret;\n offset += stride;\n for (; offset < end; offset += stride) {\n ret = callback(\n flatCoordinates.slice(offset - stride, offset),\n flatCoordinates.slice(offset, offset + stride),\n );\n if (ret) {\n return ret;\n }\n }\n return false;\n}\n\n/**\n * Calculate the intersection point of two line segments.\n * Reference: https://stackoverflow.com/a/72474223/2389327\n * @param {Array} segment1 The first line segment as an array of two points.\n * @param {Array} segment2 The second line segment as an array of two points.\n * @return {import(\"../../coordinate.js\").Coordinate|undefined} The intersection point or `undefined` if no intersection.\n */\nexport function getIntersectionPoint(segment1, segment2) {\n const [a, b] = segment1;\n const [c, d] = segment2;\n const t =\n ((a[0] - c[0]) * (c[1] - d[1]) - (a[1] - c[1]) * (c[0] - d[0])) /\n ((a[0] - b[0]) * (c[1] - d[1]) - (a[1] - b[1]) * (c[0] - d[0]));\n const u =\n ((a[0] - c[0]) * (a[1] - b[1]) - (a[1] - c[1]) * (a[0] - b[0])) /\n ((a[0] - b[0]) * (c[1] - d[1]) - (a[1] - b[1]) * (c[0] - d[0]));\n\n // Check if lines actually intersect\n if (0 <= t && t <= 1 && 0 <= u && u <= 1) {\n return [a[0] + t * (b[0] - a[0]), a[1] + t * (b[1] - a[1])];\n }\n return undefined;\n}\n","/**\n * @module ol/geom/flat/intersectsextent\n */\nimport {\n createEmpty,\n extendFlatCoordinates,\n intersects,\n intersectsSegment,\n} from '../../extent.js';\nimport {linearRingContainsExtent, linearRingContainsXY} from './contains.js';\nimport {forEach as forEachSegment} from './segments.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @param {import('../../extent.js').Extent} [coordinatesExtent] Coordinates extent\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineString(\n flatCoordinates,\n offset,\n end,\n stride,\n extent,\n coordinatesExtent,\n) {\n coordinatesExtent =\n coordinatesExtent ??\n extendFlatCoordinates(createEmpty(), flatCoordinates, offset, end, stride);\n if (!intersects(extent, coordinatesExtent)) {\n return false;\n }\n if (\n (coordinatesExtent[0] >= extent[0] && coordinatesExtent[2] <= extent[2]) ||\n (coordinatesExtent[1] >= extent[1] && coordinatesExtent[3] <= extent[3])\n ) {\n return true;\n }\n return forEachSegment(\n flatCoordinates,\n offset,\n end,\n stride,\n /**\n * @param {import(\"../../coordinate.js\").Coordinate} point1 Start point.\n * @param {import(\"../../coordinate.js\").Coordinate} point2 End point.\n * @return {boolean} `true` if the segment and the extent intersect,\n * `false` otherwise.\n */\n function (point1, point2) {\n return intersectsSegment(extent, point1, point2);\n },\n );\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineStringArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n extent,\n) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n if (\n intersectsLineString(flatCoordinates, offset, ends[i], stride, extent)\n ) {\n return true;\n }\n offset = ends[i];\n }\n return false;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRing(\n flatCoordinates,\n offset,\n end,\n stride,\n extent,\n) {\n if (intersectsLineString(flatCoordinates, offset, end, stride, extent)) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[0],\n extent[1],\n )\n ) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[0],\n extent[3],\n )\n ) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[2],\n extent[1],\n )\n ) {\n return true;\n }\n if (\n linearRingContainsXY(\n flatCoordinates,\n offset,\n end,\n stride,\n extent[2],\n extent[3],\n )\n ) {\n return true;\n }\n return false;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingArray(\n flatCoordinates,\n offset,\n ends,\n stride,\n extent,\n) {\n if (!intersectsLinearRing(flatCoordinates, offset, ends[0], stride, extent)) {\n return false;\n }\n if (ends.length === 1) {\n return true;\n }\n for (let i = 1, ii = ends.length; i < ii; ++i) {\n if (\n linearRingContainsExtent(\n flatCoordinates,\n ends[i - 1],\n ends[i],\n stride,\n extent,\n )\n ) {\n if (\n !intersectsLineString(\n flatCoordinates,\n ends[i - 1],\n ends[i],\n stride,\n extent,\n )\n ) {\n return false;\n }\n }\n }\n return true;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingMultiArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n extent,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (\n intersectsLinearRingArray(flatCoordinates, offset, ends, stride, extent)\n ) {\n return true;\n }\n offset = ends[ends.length - 1];\n }\n return false;\n}\n","/**\n * @module ol/geom/flat/reverse\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n */\nexport function coordinates(flatCoordinates, offset, end, stride) {\n while (offset < end - stride) {\n for (let i = 0; i < stride; ++i) {\n const tmp = flatCoordinates[offset + i];\n flatCoordinates[offset + i] = flatCoordinates[end - stride + i];\n flatCoordinates[end - stride + i] = tmp;\n }\n offset += stride;\n end -= stride;\n }\n}\n","/**\n * @module ol/geom/flat/orient\n */\nimport {coordinates as reverseCoordinates} from './reverse.js';\n\n/**\n * Is the linear ring oriented clockwise in a coordinate system with a bottom-left\n * coordinate origin? For a coordinate system with a top-left coordinate origin,\n * the ring's orientation is clockwise when this function returns false.\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean|undefined} Is clockwise.\n */\nexport function linearRingIsClockwise(flatCoordinates, offset, end, stride) {\n // https://stackoverflow.com/q/1165647/clockwise-method#1165943\n // https://github.com/OSGeo/gdal/blob/master/gdal/ogr/ogrlinearring.cpp\n let edge = 0;\n let x1 = flatCoordinates[end - stride];\n let y1 = flatCoordinates[end - stride + 1];\n for (; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n edge += (x2 - x1) * (y2 + y1);\n x1 = x2;\n y1 = y2;\n }\n return edge === 0 ? undefined : edge > 0;\n}\n\n/**\n * Determines if linear rings are oriented. By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Test for right-hand orientation\n * (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingsAreOriented(\n flatCoordinates,\n offset,\n ends,\n stride,\n right,\n) {\n right = right !== undefined ? right : false;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const isClockwise = linearRingIsClockwise(\n flatCoordinates,\n offset,\n end,\n stride,\n );\n if (i === 0) {\n if ((right && isClockwise) || (!right && !isClockwise)) {\n return false;\n }\n } else {\n if ((right && !isClockwise) || (!right && isClockwise)) {\n return false;\n }\n }\n offset = end;\n }\n return true;\n}\n\n/**\n * Determines if linear rings are oriented. By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Test for right-hand orientation\n * (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingssAreOriented(\n flatCoordinates,\n offset,\n endss,\n stride,\n right,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (!linearRingsAreOriented(flatCoordinates, offset, ends, stride, right)) {\n return false;\n }\n if (ends.length) {\n offset = ends[ends.length - 1];\n }\n }\n return true;\n}\n\n/**\n * Orient coordinates in a flat array of linear rings. By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings). To orient according to the\n * right-hand rule, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {boolean} [right] Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRings(\n flatCoordinates,\n offset,\n ends,\n stride,\n right,\n) {\n right = right !== undefined ? right : false;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const isClockwise = linearRingIsClockwise(\n flatCoordinates,\n offset,\n end,\n stride,\n );\n const reverse =\n i === 0\n ? (right && isClockwise) || (!right && !isClockwise)\n : (right && !isClockwise) || (!right && isClockwise);\n if (reverse) {\n reverseCoordinates(flatCoordinates, offset, end, stride);\n }\n offset = end;\n }\n return offset;\n}\n\n/**\n * Orient coordinates in a flat array of linear rings. By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings). To orient according to the\n * right-hand rule, use the `right` argument.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean} [right] Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRingsArray(\n flatCoordinates,\n offset,\n endss,\n stride,\n right,\n) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n offset = orientLinearRings(\n flatCoordinates,\n offset,\n endss[i],\n stride,\n right,\n );\n }\n return offset;\n}\n\n/**\n * Return a two-dimensional endss\n * @param {Array} flatCoordinates Flat coordinates\n * @param {Array} ends Linear ring end indexes\n * @return {Array>} Two dimensional endss array that can\n * be used to construct a MultiPolygon\n */\nexport function inflateEnds(flatCoordinates, ends) {\n const endss = [];\n let offset = 0;\n let prevEndIndex = 0;\n let startOrientation;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n // classifies an array of rings into polygons with outer rings and holes\n const orientation = linearRingIsClockwise(flatCoordinates, offset, end, 2);\n if (startOrientation === undefined) {\n startOrientation = orientation;\n }\n if (orientation === startOrientation) {\n endss.push(ends.slice(prevEndIndex, i + 1));\n } else {\n if (endss.length === 0) {\n continue;\n }\n endss[endss.length - 1].push(ends[prevEndIndex]);\n }\n prevEndIndex = i + 1;\n offset = end;\n }\n return endss;\n}\n","/**\n * @module ol/geom/Polygon\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY, getCenter, isEmpty} from '../extent.js';\nimport {modulo} from '../math.js';\nimport {offset as sphereOffset} from '../sphere.js';\nimport LinearRing from './LinearRing.js';\nimport Point from './Point.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {linearRings as linearRingsArea} from './flat/area.js';\nimport {arrayMaxSquaredDelta, assignClosestArrayPoint} from './flat/closest.js';\nimport {linearRingsContainsXY} from './flat/contains.js';\nimport {deflateCoordinatesArray} from './flat/deflate.js';\nimport {inflateCoordinatesArray} from './flat/inflate.js';\nimport {getInteriorPointOfArray} from './flat/interiorpoint.js';\nimport {intersectsLinearRingArray} from './flat/intersectsextent.js';\nimport {linearRingsAreOriented, orientLinearRings} from './flat/orient.js';\nimport {quantizeArray} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Polygon geometry.\n *\n * @api\n */\nclass Polygon extends SimpleGeometry {\n /**\n * @param {!Array>|!Array} coordinates\n * Array of linear rings that define the polygon. The first linear ring of the\n * array defines the outer-boundary or surface of the polygon. Each subsequent\n * linear ring defines a hole in the surface of the polygon. A linear ring is\n * an array of vertices' coordinates where the first coordinate and the last are\n * equivalent. (For internal use, flat coordinates in combination with\n * `layout` and `ends` are also accepted.)\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @param {Array} [ends] Ends (for internal use with flat coordinates).\n */\n constructor(coordinates, layout, ends) {\n super();\n\n /**\n * @type {Array}\n * @private\n */\n this.ends_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.flatInteriorPointRevision_ = -1;\n\n /**\n * @private\n * @type {import(\"../coordinate.js\").Coordinate|null}\n */\n this.flatInteriorPoint_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.orientedRevision_ = -1;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.orientedFlatCoordinates_ = null;\n\n if (layout !== undefined && ends) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n this.ends_ = ends;\n } else {\n this.setCoordinates(\n /** @type {Array>} */ (\n coordinates\n ),\n layout,\n );\n }\n }\n\n /**\n * Append the passed linear ring to this polygon.\n * @param {LinearRing} linearRing Linear ring.\n * @api\n */\n appendLinearRing(linearRing) {\n if (!this.flatCoordinates) {\n this.flatCoordinates = linearRing.getFlatCoordinates().slice();\n } else {\n extend(this.flatCoordinates, linearRing.getFlatCoordinates());\n }\n this.ends_.push(this.flatCoordinates.length);\n this.changed();\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!Polygon} Clone.\n * @api\n * @override\n */\n clone() {\n const polygon = new Polygon(\n this.flatCoordinates.slice(),\n this.layout,\n this.ends_.slice(),\n );\n polygon.applyProperties(this);\n return polygon;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n arrayMaxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n 0,\n ),\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestArrayPoint(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n this.maxDelta_,\n true,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n );\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n * @override\n */\n containsXY(x, y) {\n return linearRingsContainsXY(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride,\n x,\n y,\n );\n }\n\n /**\n * Return the area of the polygon on projected plane.\n * @return {number} Area (on projected plane).\n * @api\n */\n getArea() {\n return linearRingsArea(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride,\n );\n }\n\n /**\n * Get the coordinate array for this geometry. This array has the structure\n * of a GeoJSON coordinate array for polygons.\n *\n * @param {boolean} [right] Orient coordinates according to the right-hand\n * rule (counter-clockwise for exterior and clockwise for interior rings).\n * If `false`, coordinates will be oriented according to the left-hand rule\n * (clockwise for exterior and counter-clockwise for interior rings).\n * By default, coordinate orientation will depend on how the geometry was\n * constructed.\n * @return {Array>} Coordinates.\n * @api\n * @override\n */\n getCoordinates(right) {\n let flatCoordinates;\n if (right !== undefined) {\n flatCoordinates = this.getOrientedFlatCoordinates().slice();\n orientLinearRings(flatCoordinates, 0, this.ends_, this.stride, right);\n } else {\n flatCoordinates = this.flatCoordinates;\n }\n\n return inflateCoordinatesArray(flatCoordinates, 0, this.ends_, this.stride);\n }\n\n /**\n * @return {Array} Ends.\n */\n getEnds() {\n return this.ends_;\n }\n\n /**\n * @return {Array} Interior point.\n */\n getFlatInteriorPoint() {\n if (this.flatInteriorPointRevision_ != this.getRevision()) {\n const flatCenter = getCenter(this.getExtent());\n this.flatInteriorPoint_ = getInteriorPointOfArray(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride,\n flatCenter,\n 0,\n );\n this.flatInteriorPointRevision_ = this.getRevision();\n }\n return /** @type {import(\"../coordinate.js\").Coordinate} */ (\n this.flatInteriorPoint_\n );\n }\n\n /**\n * Return an interior point of the polygon.\n * @return {Point} Interior point as XYM coordinate, where M is the\n * length of the horizontal intersection that the point belongs to.\n * @api\n */\n getInteriorPoint() {\n return new Point(this.getFlatInteriorPoint(), 'XYM');\n }\n\n /**\n * Return the number of rings of the polygon, this includes the exterior\n * ring and any interior rings.\n *\n * @return {number} Number of rings.\n * @api\n */\n getLinearRingCount() {\n return this.ends_.length;\n }\n\n /**\n * Return the Nth linear ring of the polygon geometry. Return `null` if the\n * given index is out of range.\n * The exterior linear ring is available at index `0` and the interior rings\n * at index `1` and beyond.\n *\n * @param {number} index Index.\n * @return {LinearRing|null} Linear ring.\n * @api\n */\n getLinearRing(index) {\n if (index < 0 || this.ends_.length <= index) {\n return null;\n }\n return new LinearRing(\n this.flatCoordinates.slice(\n index === 0 ? 0 : this.ends_[index - 1],\n this.ends_[index],\n ),\n this.layout,\n );\n }\n\n /**\n * Return the linear rings of the polygon.\n * @return {Array} Linear rings.\n * @api\n */\n getLinearRings() {\n const layout = this.layout;\n const flatCoordinates = this.flatCoordinates;\n const ends = this.ends_;\n const linearRings = [];\n let offset = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const linearRing = new LinearRing(\n flatCoordinates.slice(offset, end),\n layout,\n );\n linearRings.push(linearRing);\n offset = end;\n }\n return linearRings;\n }\n\n /**\n * @return {Array} Oriented flat coordinates.\n */\n getOrientedFlatCoordinates() {\n if (this.orientedRevision_ != this.getRevision()) {\n const flatCoordinates = this.flatCoordinates;\n if (linearRingsAreOriented(flatCoordinates, 0, this.ends_, this.stride)) {\n this.orientedFlatCoordinates_ = flatCoordinates;\n } else {\n this.orientedFlatCoordinates_ = flatCoordinates.slice();\n this.orientedFlatCoordinates_.length = orientLinearRings(\n this.orientedFlatCoordinates_,\n 0,\n this.ends_,\n this.stride,\n );\n }\n this.orientedRevision_ = this.getRevision();\n }\n return /** @type {Array} */ (this.orientedFlatCoordinates_);\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Polygon} Simplified Polygon.\n * @protected\n * @override\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n /** @type {Array} */\n const simplifiedFlatCoordinates = [];\n /** @type {Array} */\n const simplifiedEnds = [];\n simplifiedFlatCoordinates.length = quantizeArray(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n Math.sqrt(squaredTolerance),\n simplifiedFlatCoordinates,\n 0,\n simplifiedEnds,\n );\n return new Polygon(simplifiedFlatCoordinates, 'XY', simplifiedEnds);\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'Polygon';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return intersectsLinearRingArray(\n this.getOrientedFlatCoordinates(),\n 0,\n this.ends_,\n this.stride,\n extent,\n );\n }\n\n /**\n * Set the coordinates of the polygon.\n * @param {!Array>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 2);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n const ends = deflateCoordinatesArray(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n this.ends_,\n );\n this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n this.changed();\n }\n}\n\nexport default Polygon;\n\n/**\n * Create an approximation of a circle on the surface of a sphere.\n * @param {import(\"../coordinate.js\").Coordinate} center Center (`[lon, lat]` in degrees).\n * @param {number} radius The great-circle distance from the center to\n * the polygon vertices in meters.\n * @param {number} [n] Optional number of vertices for the resulting\n * polygon. Default is `32`.\n * @param {number} [sphereRadius] Optional radius for the sphere (defaults to\n * the Earth's mean radius using the WGS84 ellipsoid).\n * @return {Polygon} The \"circular\" polygon.\n * @api\n */\nexport function circular(center, radius, n, sphereRadius) {\n n = n ? n : 32;\n /** @type {Array} */\n const flatCoordinates = [];\n for (let i = 0; i < n; ++i) {\n extend(\n flatCoordinates,\n sphereOffset(center, radius, (2 * Math.PI * i) / n, sphereRadius),\n );\n }\n flatCoordinates.push(flatCoordinates[0], flatCoordinates[1]);\n return new Polygon(flatCoordinates, 'XY', [flatCoordinates.length]);\n}\n\n/**\n * Create a polygon from an extent. The layout used is `XY`.\n * @param {import(\"../extent.js\").Extent} extent The extent.\n * @return {Polygon} The polygon.\n * @api\n */\nexport function fromExtent(extent) {\n if (isEmpty(extent)) {\n throw new Error('Cannot create polygon from empty extent');\n }\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const flatCoordinates = [\n minX,\n minY,\n minX,\n maxY,\n maxX,\n maxY,\n maxX,\n minY,\n minX,\n minY,\n ];\n return new Polygon(flatCoordinates, 'XY', [flatCoordinates.length]);\n}\n\n/**\n * Create a regular polygon from a circle.\n * @param {import(\"./Circle.js\").default} circle Circle geometry.\n * @param {number} [sides] Number of sides of the polygon. Default is 32.\n * @param {number} [angle] Start angle for the first vertex of the polygon in\n * counter-clockwise radians. 0 means East. Default is 0.\n * @return {Polygon} Polygon geometry.\n * @api\n */\nexport function fromCircle(circle, sides, angle) {\n sides = sides ? sides : 32;\n const stride = circle.getStride();\n const layout = circle.getLayout();\n const center = circle.getCenter();\n const arrayLength = stride * (sides + 1);\n const flatCoordinates = new Array(arrayLength);\n for (let i = 0; i < arrayLength; i += stride) {\n flatCoordinates[i] = 0;\n flatCoordinates[i + 1] = 0;\n for (let j = 2; j < stride; j++) {\n flatCoordinates[i + j] = center[j];\n }\n }\n const ends = [flatCoordinates.length];\n const polygon = new Polygon(flatCoordinates, layout, ends);\n makeRegular(polygon, center, circle.getRadius(), angle);\n return polygon;\n}\n\n/**\n * Modify the coordinates of a polygon to make it a regular polygon.\n * @param {Polygon} polygon Polygon geometry.\n * @param {import(\"../coordinate.js\").Coordinate} center Center of the regular polygon.\n * @param {number} radius Radius of the regular polygon.\n * @param {number} [angle] Start angle for the first vertex of the polygon in\n * counter-clockwise radians. 0 means East. Default is 0.\n */\nexport function makeRegular(polygon, center, radius, angle) {\n const flatCoordinates = polygon.getFlatCoordinates();\n const stride = polygon.getStride();\n const sides = flatCoordinates.length / stride - 1;\n const startAngle = angle ? angle : 0;\n for (let i = 0; i <= sides; ++i) {\n const offset = i * stride;\n const angle = startAngle + (modulo(i, sides) * 2 * Math.PI) / sides;\n flatCoordinates[offset] = center[0] + radius * Math.cos(angle);\n flatCoordinates[offset + 1] = center[1] + radius * Math.sin(angle);\n }\n polygon.changed();\n}\n","/**\n * @module ol/ImageState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n IDLE: 0,\n LOADING: 1,\n LOADED: 2,\n ERROR: 3,\n EMPTY: 4,\n};\n","/**\n * @module ol/has\n */\n\nconst ua =\n typeof navigator !== 'undefined' && typeof navigator.userAgent !== 'undefined'\n ? navigator.userAgent.toLowerCase()\n : '';\n\n/**\n * User agent string says we are dealing with Safari as browser.\n * @type {boolean}\n */\nexport const SAFARI = ua.includes('safari') && !ua.includes('chrom');\n\n/**\n * https://bugs.webkit.org/show_bug.cgi?id=237906\n * @type {boolean}\n */\nexport const SAFARI_BUG_237906 =\n SAFARI &&\n (ua.includes('version/15.4') ||\n /cpu (os|iphone os) 15_4 like mac os x/.test(ua));\n\n/**\n * User agent string says we are dealing with a WebKit engine.\n * @type {boolean}\n */\nexport const WEBKIT = ua.includes('webkit') && !ua.includes('edge');\n\n/**\n * User agent string says we are dealing with a Mac as platform.\n * @type {boolean}\n */\nexport const MAC = ua.includes('macintosh');\n\n/**\n * The ratio between physical pixels and device-independent pixels\n * (dips) on the device (`window.devicePixelRatio`).\n * @const\n * @type {number}\n * @api\n */\nexport const DEVICE_PIXEL_RATIO =\n typeof devicePixelRatio !== 'undefined' ? devicePixelRatio : 1;\n\n/**\n * The execution context is a worker with OffscreenCanvas available.\n * @const\n * @type {boolean}\n */\nexport const WORKER_OFFSCREEN_CANVAS =\n typeof WorkerGlobalScope !== 'undefined' &&\n typeof OffscreenCanvas !== 'undefined' &&\n self instanceof WorkerGlobalScope; //eslint-disable-line\n\n/**\n * Image.prototype.decode() is supported.\n * @type {boolean}\n */\nexport const IMAGE_DECODE =\n typeof Image !== 'undefined' && Image.prototype.decode;\n\n/**\n * createImageBitmap() is supported.\n * @type {boolean}\n */\nexport const CREATE_IMAGE_BITMAP = typeof createImageBitmap === 'function';\n\n/**\n * @type {boolean}\n */\nexport const PASSIVE_EVENT_LISTENERS = (function () {\n let passive = false;\n try {\n const options = Object.defineProperty({}, 'passive', {\n get: function () {\n passive = true;\n },\n });\n\n // @ts-ignore Ignore invalid event type '_'\n window.addEventListener('_', null, options);\n // @ts-ignore Ignore invalid event type '_'\n window.removeEventListener('_', null, options);\n } catch {\n // passive not supported\n }\n return passive;\n})();\n","/**\n * @module ol/Image\n */\nimport ImageState from './ImageState.js';\nimport {listenOnce, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\nimport EventTarget from './events/Target.js';\nimport {toPromise} from './functions.js';\nimport {CREATE_IMAGE_BITMAP, IMAGE_DECODE} from './has.js';\n\n/**\n * A function that takes an {@link module:ol/Image~ImageWrapper} for the image and a\n * `{string}` for the src as arguments. It is supposed to make it so the\n * underlying image {@link module:ol/Image~ImageWrapper#getImage} is assigned the\n * content specified by the src. If not specified, the default is\n *\n * function(image, src) {\n * image.getImage().src = src;\n * }\n *\n * Providing a custom `imageLoadFunction` can be useful to load images with\n * post requests or - in general - through XHR requests, where the src of the\n * image element would be set to a data URI when the content is loaded.\n *\n * @typedef {function(import(\"./Image.js\").default, string): void} LoadFunction\n * @api\n */\n\n/**\n * @typedef {Object} ImageObject\n * @property {import(\"./extent.js\").Extent} [extent] Extent, if different from the requested one.\n * @property {import(\"./resolution.js\").ResolutionLike} [resolution] Resolution, if different from the requested one.\n * When x and y resolution are different, use the array type (`[xResolution, yResolution]`).\n * @property {number} [pixelRatio] Pixel ratio, if different from the requested one.\n * @property {import('./DataTile.js').ImageLike} image Image.\n */\n\n/**\n * Loader function used for image sources. Receives extent, resolution and pixel ratio as arguments.\n * For images that cover any extent and resolution (static images), the loader function should not accept\n * any arguments. The function returns an {@link import(\"./DataTile.js\").ImageLike image}, an\n * {@link import(\"./Image.js\").ImageObject image object}, or a promise for the same.\n * For loaders that generate images, the promise should not resolve until the image is loaded.\n * If the returned image does not match the extent, resolution or pixel ratio passed to the loader,\n * it has to return an {@link import(\"./Image.js\").ImageObject image object} with the `image` and the\n * correct `extent`, `resolution` and `pixelRatio`.\n *\n * @typedef {function(import(\"./extent.js\").Extent, number, number, (function(HTMLImageElement, string): void)=): import(\"./DataTile.js\").ImageLike|ImageObject|Promise} Loader\n * @api\n */\n\n/**\n * Loader function used for image sources. Receives extent, resolution and pixel ratio as arguments.\n * The function returns a promise for an {@link import(\"./Image.js\").ImageObject image object}.\n *\n * @typedef {function(import(\"./extent.js\").Extent, number, number, (function(HTMLImageElement, string): void)=): Promise} ImageObjectPromiseLoader\n */\n\nclass ImageWrapper extends EventTarget {\n /**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number|Array|undefined} resolution Resolution. If provided as array, x and y\n * resolution will be assumed.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"./ImageState.js\").default|Loader} stateOrLoader State.\n */\n constructor(extent, resolution, pixelRatio, stateOrLoader) {\n super();\n\n /**\n * @protected\n * @type {import(\"./extent.js\").Extent}\n */\n this.extent = extent;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @protected\n * @type {number|Array|undefined}\n */\n this.resolution = resolution;\n\n /**\n * @protected\n * @type {import(\"./ImageState.js\").default}\n */\n this.state =\n typeof stateOrLoader === 'function' ? ImageState.IDLE : stateOrLoader;\n\n /**\n * @private\n * @type {import('./DataTile.js').ImageLike|null}\n */\n this.image_ = null;\n\n /**\n * @protected\n * @type {Loader|null}\n */\n this.loader = typeof stateOrLoader === 'function' ? stateOrLoader : null;\n }\n\n /**\n * @protected\n */\n changed() {\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * @return {import(\"./extent.js\").Extent} Extent.\n */\n getExtent() {\n return this.extent;\n }\n\n /**\n * @return {import('./DataTile.js').ImageLike} Image.\n */\n getImage() {\n return this.image_;\n }\n\n /**\n * @return {number} PixelRatio.\n */\n getPixelRatio() {\n return this.pixelRatio_;\n }\n\n /**\n * @return {number|Array} Resolution.\n */\n getResolution() {\n return /** @type {number} */ (this.resolution);\n }\n\n /**\n * @return {import(\"./ImageState.js\").default} State.\n */\n getState() {\n return this.state;\n }\n\n /**\n * Load not yet loaded URI.\n */\n load() {\n if (this.state == ImageState.IDLE) {\n if (this.loader) {\n this.state = ImageState.LOADING;\n this.changed();\n const resolution = this.getResolution();\n const requestResolution = Array.isArray(resolution)\n ? resolution[0]\n : resolution;\n toPromise(() =>\n this.loader(\n this.getExtent(),\n requestResolution,\n this.getPixelRatio(),\n ),\n )\n .then((image) => {\n if ('image' in image) {\n this.image_ = image.image;\n }\n if ('extent' in image) {\n this.extent = image.extent;\n }\n if ('resolution' in image) {\n this.resolution = image.resolution;\n }\n if ('pixelRatio' in image) {\n this.pixelRatio_ = image.pixelRatio;\n }\n if (\n image instanceof HTMLImageElement ||\n (CREATE_IMAGE_BITMAP && image instanceof ImageBitmap) ||\n image instanceof HTMLCanvasElement ||\n image instanceof HTMLVideoElement\n ) {\n this.image_ = image;\n }\n this.state = ImageState.LOADED;\n })\n .catch((error) => {\n this.state = ImageState.ERROR;\n console.error(error); // eslint-disable-line no-console\n })\n .finally(() => this.changed());\n }\n }\n }\n\n /**\n * @param {import('./DataTile.js').ImageLike} image The image.\n */\n setImage(image) {\n this.image_ = image;\n }\n\n /**\n * @param {number|Array} resolution Resolution.\n */\n setResolution(resolution) {\n this.resolution = resolution;\n }\n}\n\n/**\n * @param {import('./DataTile.js').ImageLike} image Image element.\n * @param {function():any} loadHandler Load callback function.\n * @param {function():any} errorHandler Error callback function.\n * @return {function():void} Callback to stop listening.\n */\nexport function listenImage(image, loadHandler, errorHandler) {\n const img = /** @type {HTMLImageElement} */ (image);\n let listening = true;\n let decoding = false;\n let loaded = false;\n\n const listenerKeys = [\n listenOnce(img, EventType.LOAD, function () {\n loaded = true;\n if (!decoding) {\n loadHandler();\n }\n }),\n ];\n\n if (img.src && IMAGE_DECODE) {\n decoding = true;\n img\n .decode()\n .then(function () {\n if (listening) {\n loadHandler();\n }\n })\n .catch(function (error) {\n if (listening) {\n if (loaded) {\n loadHandler();\n } else {\n errorHandler();\n }\n }\n });\n } else {\n listenerKeys.push(listenOnce(img, EventType.ERROR, errorHandler));\n }\n\n return function unlisten() {\n listening = false;\n listenerKeys.forEach(unlistenByKey);\n };\n}\n\n/**\n * Loads an image.\n * @param {HTMLImageElement} image Image, not yet loaded.\n * @param {string} [src] `src` attribute of the image. Optional, not required if already present.\n * @return {Promise} Promise resolving to an `HTMLImageElement`.\n * @api\n */\nexport function load(image, src) {\n return new Promise((resolve, reject) => {\n function handleLoad() {\n unlisten();\n resolve(image);\n }\n function handleError() {\n unlisten();\n reject(new Error('Image load error'));\n }\n function unlisten() {\n image.removeEventListener('load', handleLoad);\n image.removeEventListener('error', handleError);\n }\n image.addEventListener('load', handleLoad);\n image.addEventListener('error', handleError);\n if (src) {\n image.src = src;\n }\n });\n}\n\n/**\n * @param {HTMLImageElement} image Image, not yet loaded.\n * @param {string} [src] `src` attribute of the image. Optional, not required if already present.\n * @return {Promise} Promise resolving to an `HTMLImageElement`.\n */\nexport function decodeFallback(image, src) {\n if (src) {\n image.src = src;\n }\n return image.src && IMAGE_DECODE\n ? new Promise((resolve, reject) =>\n image\n .decode()\n .then(() => resolve(image))\n .catch((e) =>\n image.complete && image.width ? resolve(image) : reject(e),\n ),\n )\n : load(image);\n}\n\n/**\n * Loads an image and decodes it to an `ImageBitmap` if `createImageBitmap()` is supported. Returns\n * the loaded image otherwise.\n * @param {HTMLImageElement} image Image, not yet loaded.\n * @param {string} [src] `src` attribute of the image. Optional, not required if already present.\n * @return {Promise} Promise resolving to an `ImageBitmap` or an\n * `HTMLImageElement` if `createImageBitmap()` is not supported.\n * @api\n */\nexport function decode(image, src) {\n if (src) {\n image.src = src;\n }\n return image.src && IMAGE_DECODE && CREATE_IMAGE_BITMAP\n ? image\n .decode()\n .then(() => createImageBitmap(image))\n .catch((e) => {\n if (image.complete && image.width) {\n return image;\n }\n throw e;\n })\n : decodeFallback(image);\n}\n\nexport default ImageWrapper;\n","/**\n * @module ol/TileState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n IDLE: 0,\n LOADING: 1,\n LOADED: 2,\n /**\n * Indicates that tile loading failed\n * @type {number}\n */\n ERROR: 3,\n EMPTY: 4,\n};\n","/**\n * @module ol/easing\n */\n\n/**\n * Start slow and speed up.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeIn(t) {\n return Math.pow(t, 3);\n}\n\n/**\n * Start fast and slow down.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeOut(t) {\n return 1 - easeIn(1 - t);\n}\n\n/**\n * Start slow, speed up, and then slow down again.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function inAndOut(t) {\n return 3 * t * t - 2 * t * t * t;\n}\n\n/**\n * Maintain a constant speed over time.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function linear(t) {\n return t;\n}\n\n/**\n * Start slow, speed up, and at the very end slow down again. This has the\n * same general behavior as {@link module:ol/easing.inAndOut}, but the final\n * slowdown is delayed.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function upAndDown(t) {\n if (t < 0.5) {\n return inAndOut(2 * t);\n }\n return 1 - inAndOut(2 * (t - 0.5));\n}\n","/**\n * @module ol/Tile\n */\nimport TileState from './TileState.js';\nimport {easeIn} from './easing.js';\nimport EventType from './events/EventType.js';\nimport EventTarget from './events/Target.js';\nimport {abstract} from './util.js';\n\n/**\n * A function that takes a {@link module:ol/Tile~Tile} for the tile and a\n * `{string}` for the url as arguments. The default is\n * ```js\n * source.setTileLoadFunction(function(tile, src) {\n * tile.getImage().src = src;\n * });\n * ```\n * For more fine grained control, the load function can use fetch or XMLHttpRequest and involve\n * error handling:\n *\n * ```js\n * import TileState from 'ol/TileState.js';\n *\n * source.setTileLoadFunction(function(tile, src) {\n * const xhr = new XMLHttpRequest();\n * xhr.responseType = 'blob';\n * xhr.addEventListener('loadend', function (evt) {\n * const data = this.response;\n * if (data !== undefined) {\n * tile.getImage().src = URL.createObjectURL(data);\n * } else {\n * tile.setState(TileState.ERROR);\n * }\n * });\n * xhr.addEventListener('error', function () {\n * tile.setState(TileState.ERROR);\n * });\n * xhr.open('GET', src);\n * xhr.send();\n * });\n * ```\n *\n * @typedef {function(Tile, string): void} LoadFunction\n * @api\n */\n\n/**\n * {@link module:ol/source/Tile~TileSource} sources use a function of this type to get\n * the url that provides a tile for a given tile coordinate.\n *\n * This function takes a {@link module:ol/tilecoord~TileCoord} for the tile\n * coordinate, a `{number}` representing the pixel ratio and a\n * {@link module:ol/proj/Projection~Projection} for the projection as arguments\n * and returns a `{string}` representing the tile URL, or undefined if no tile\n * should be requested for the passed tile coordinate.\n *\n * @typedef {function(import(\"./tilecoord.js\").TileCoord, number,\n * import(\"./proj/Projection.js\").default): (string|undefined)} UrlFunction\n * @api\n */\n\n/**\n * @typedef {Object} Options\n * @property {number} [transition=250] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling. By default,\n * the nearest neighbor is used when resampling.\n * @api\n */\n\n/**\n * @classdesc\n * Base class for tiles.\n *\n * @abstract\n */\nclass Tile extends EventTarget {\n /**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./TileState.js\").default} state State.\n * @param {Options} [options] Tile options.\n */\n constructor(tileCoord, state, options) {\n super();\n\n options = options ? options : {};\n\n /**\n * @type {import(\"./tilecoord.js\").TileCoord}\n */\n this.tileCoord = tileCoord;\n\n /**\n * @protected\n * @type {import(\"./TileState.js\").default}\n */\n this.state = state;\n\n /**\n * A key assigned to the tile. This is used in conjunction with a source key\n * to determine if a cached version of this tile may be used by the renderer.\n * @type {string}\n */\n this.key = '';\n\n /**\n * The duration for the opacity transition.\n * @private\n * @type {number}\n */\n this.transition_ =\n options.transition === undefined ? 250 : options.transition;\n\n /**\n * Lookup of start times for rendering transitions. If the start time is\n * equal to -1, the transition is complete.\n * @private\n * @type {Object}\n */\n this.transitionStarts_ = {};\n\n /**\n * @type {boolean}\n */\n this.interpolate = !!options.interpolate;\n }\n\n /**\n * @protected\n */\n changed() {\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * Called by the tile cache when the tile is removed from the cache due to expiry\n */\n release() {\n // to remove the `change` listener on this tile in `ol/TileQueue#handleTileChange`\n this.setState(TileState.EMPTY);\n }\n\n /**\n * @return {string} Key.\n */\n getKey() {\n return this.key + '/' + this.tileCoord;\n }\n\n /**\n * Get the tile coordinate for this tile.\n * @return {import(\"./tilecoord.js\").TileCoord} The tile coordinate.\n * @api\n */\n getTileCoord() {\n return this.tileCoord;\n }\n\n /**\n * @return {import(\"./TileState.js\").default} State.\n */\n getState() {\n return this.state;\n }\n\n /**\n * Sets the state of this tile. If you write your own {@link module:ol/Tile~LoadFunction tileLoadFunction} ,\n * it is important to set the state correctly to {@link module:ol/TileState~ERROR}\n * when the tile cannot be loaded. Otherwise the tile cannot be removed from\n * the tile queue and will block other requests.\n * @param {import(\"./TileState.js\").default} state State.\n * @api\n */\n setState(state) {\n if (this.state === TileState.EMPTY) {\n // no more state changes\n return;\n }\n if (this.state !== TileState.ERROR && this.state > state) {\n throw new Error('Tile load sequence violation');\n }\n this.state = state;\n this.changed();\n }\n\n /**\n * Load the image or retry if loading previously failed.\n * Loading is taken care of by the tile queue, and calling this method is\n * only needed for preloading or for reloading in case of an error.\n * @abstract\n * @api\n */\n load() {\n abstract();\n }\n\n /**\n * Get the alpha value for rendering.\n * @param {string} id An id for the renderer.\n * @param {number} time The render frame time.\n * @return {number} A number between 0 and 1.\n */\n getAlpha(id, time) {\n if (!this.transition_) {\n return 1;\n }\n\n let start = this.transitionStarts_[id];\n if (!start) {\n start = time;\n this.transitionStarts_[id] = start;\n } else if (start === -1) {\n return 1;\n }\n\n const delta = time - start + 1000 / 60; // avoid rendering at 0\n if (delta >= this.transition_) {\n return 1;\n }\n return easeIn(delta / this.transition_);\n }\n\n /**\n * Determine if a tile is in an alpha transition. A tile is considered in\n * transition if tile.getAlpha() has not yet been called or has been called\n * and returned 1.\n * @param {string} id An id for the renderer.\n * @return {boolean} The tile is in transition.\n */\n inTransition(id) {\n if (!this.transition_) {\n return false;\n }\n return this.transitionStarts_[id] !== -1;\n }\n\n /**\n * Mark a transition as complete.\n * @param {string} id An id for the renderer.\n */\n endTransition(id) {\n if (this.transition_) {\n this.transitionStarts_[id] = -1;\n }\n }\n\n /**\n * @override\n */\n disposeInternal() {\n this.release();\n super.disposeInternal();\n }\n}\n\nexport default Tile;\n","import {WORKER_OFFSCREEN_CANVAS} from './has.js';\n\n/**\n * @module ol/dom\n */\n\n/**\n * @typedef {Object} ImageAttributes\n * @property {string|null} [crossOrigin] Cross origin.\n * @property {ReferrerPolicy} [referrerPolicy] Referrer policy.\n */\n\n//FIXME Move this function to the canvas module\n/**\n * Create an html canvas element and returns its 2d context.\n * @param {number} [width] Canvas width.\n * @param {number} [height] Canvas height.\n * @param {Array} [canvasPool] Canvas pool to take existing canvas from.\n * @param {CanvasRenderingContext2DSettings} [settings] CanvasRenderingContext2DSettings\n * @return {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} The context.\n */\nexport function createCanvasContext2D(width, height, canvasPool, settings) {\n /** @type {HTMLCanvasElement|OffscreenCanvas} */\n let canvas;\n if (canvasPool && canvasPool.length) {\n canvas = /** @type {HTMLCanvasElement} */ (canvasPool.shift());\n } else if (WORKER_OFFSCREEN_CANVAS) {\n canvas = new (class extends OffscreenCanvas {\n style = {};\n })(width ?? 300, height ?? 150);\n } else {\n canvas = document.createElement('canvas');\n }\n if (width) {\n canvas.width = width;\n }\n if (height) {\n canvas.height = height;\n }\n return /** @type {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} */ (\n canvas.getContext('2d', settings)\n );\n}\n\n/**\n * @type {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D}\n */\nlet sharedCanvasContext;\n\n/**\n * @return {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} Shared canvas context.\n */\nexport function getSharedCanvasContext2D() {\n if (!sharedCanvasContext) {\n sharedCanvasContext = createCanvasContext2D(1, 1);\n }\n return sharedCanvasContext;\n}\n\n/**\n * Releases canvas memory to avoid exceeding memory limits in Safari.\n * See https://pqina.nl/blog/total-canvas-memory-use-exceeds-the-maximum-limit/\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context Context.\n */\nexport function releaseCanvas(context) {\n const canvas = context.canvas;\n canvas.width = 1;\n canvas.height = 1;\n context.clearRect(0, 0, 1, 1);\n}\n\n/**\n * Get the current computed width for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerWidth(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The width.\n */\nexport function outerWidth(element) {\n let width = element.offsetWidth;\n const style = getComputedStyle(element);\n width += parseInt(style.marginLeft, 10) + parseInt(style.marginRight, 10);\n\n return width;\n}\n\n/**\n * Get the current computed height for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerHeight(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The height.\n */\nexport function outerHeight(element) {\n let height = element.offsetHeight;\n const style = getComputedStyle(element);\n height += parseInt(style.marginTop, 10) + parseInt(style.marginBottom, 10);\n\n return height;\n}\n\n/**\n * @param {Node} newNode Node to replace old node\n * @param {Node} oldNode The node to be replaced\n */\nexport function replaceNode(newNode, oldNode) {\n const parent = oldNode.parentNode;\n if (parent) {\n parent.replaceChild(newNode, oldNode);\n }\n}\n\n/**\n * @param {Node} node The node to remove the children from.\n */\nexport function removeChildren(node) {\n while (node.lastChild) {\n node.lastChild.remove();\n }\n}\n\n/**\n * Transform the children of a parent node so they match the\n * provided list of children. This function aims to efficiently\n * remove, add, and reorder child nodes while maintaining a simple\n * implementation (it is not guaranteed to minimize DOM operations).\n * @param {Node} node The parent node whose children need reworking.\n * @param {Array} children The desired children.\n */\nexport function replaceChildren(node, children) {\n const oldChildren = node.childNodes;\n\n for (let i = 0; true; ++i) {\n const oldChild = oldChildren[i];\n const newChild = children[i];\n\n // check if our work is done\n if (!oldChild && !newChild) {\n break;\n }\n\n // check if children match\n if (oldChild === newChild) {\n continue;\n }\n\n // check if a new child needs to be added\n if (!oldChild) {\n node.appendChild(newChild);\n continue;\n }\n\n // check if an old child needs to be removed\n if (!newChild) {\n node.removeChild(oldChild);\n --i;\n continue;\n }\n\n // reorder\n node.insertBefore(newChild, oldChild);\n }\n}\n\n/**\n * Creates a minimal structure that mocks a DIV to be used by the composite and\n * layer renderer in a worker environment\n * @return {HTMLDivElement} mocked DIV\n */\nexport function createMockDiv() {\n const mockedDiv = new Proxy(\n {\n /**\n * @type {Array}\n */\n childNodes: [],\n /**\n * @param {HTMLElement} node html node.\n * @return {HTMLElement} html node.\n */\n appendChild: function (node) {\n this.childNodes.push(node);\n return node;\n },\n /**\n * dummy function, as this structure is not supposed to have a parent.\n */\n remove: function () {},\n /**\n * @param {HTMLElement} node html node.\n * @return {HTMLElement} html node.\n */\n removeChild: function (node) {\n const index = this.childNodes.indexOf(node);\n if (index === -1) {\n throw new Error('Node to remove was not found');\n }\n this.childNodes.splice(index, 1);\n return node;\n },\n /**\n * @param {HTMLElement} newNode new html node.\n * @param {HTMLElement} referenceNode reference html node.\n * @return {HTMLElement} new html node.\n */\n insertBefore: function (newNode, referenceNode) {\n const index = this.childNodes.indexOf(referenceNode);\n if (index === -1) {\n throw new Error('Reference node not found');\n }\n this.childNodes.splice(index, 0, newNode);\n return newNode;\n },\n style: {},\n },\n {\n get(target, prop, receiver) {\n if (prop === 'firstElementChild') {\n return target.childNodes.length > 0 ? target.childNodes[0] : null;\n }\n return Reflect.get(target, prop, receiver);\n },\n },\n );\n return /** @type {HTMLDivElement} */ (/** @type {*} */ (mockedDiv));\n}\n\n/***\n * @param {*} obj The object to check.\n * @return {obj is (HTMLCanvasElement | OffscreenCanvas)} The object is a canvas.\n */\nexport function isCanvas(obj) {\n return (\n (typeof HTMLCanvasElement !== 'undefined' &&\n obj instanceof HTMLCanvasElement) ||\n (typeof OffscreenCanvas !== 'undefined' && obj instanceof OffscreenCanvas)\n );\n}\n","/**\n * @module ol/ImageTile\n */\nimport {listenImage} from './Image.js';\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\nimport {createCanvasContext2D} from './dom.js';\nimport {WORKER_OFFSCREEN_CANVAS} from './has.js';\n\nclass ImageTile extends Tile {\n /**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./TileState.js\").default} state State.\n * @param {string} src Image source URI.\n * @param {import('./dom.js').ImageAttributes} imageAttributes Image attributes options.\n * @param {import(\"./Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n * @param {import(\"./Tile.js\").Options} [options] Tile options.\n */\n constructor(\n tileCoord,\n state,\n src,\n imageAttributes,\n tileLoadFunction,\n options,\n ) {\n super(tileCoord, state, options);\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ = imageAttributes?.crossOrigin;\n\n /**\n * @private\n * @type {ReferrerPolicy}\n */\n this.referrerPolicy_ = imageAttributes?.referrerPolicy;\n\n /**\n * Image URI\n *\n * @private\n * @type {string}\n */\n this.src_ = src;\n\n this.key = src;\n\n /**\n * @private\n * @type {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas}\n */\n this.image_;\n\n if (WORKER_OFFSCREEN_CANVAS) {\n this.image_ = new OffscreenCanvas(1, 1);\n } else {\n this.image_ = new Image();\n if (this.crossOrigin_ !== null) {\n this.image_.crossOrigin = this.crossOrigin_;\n }\n if (this.referrerPolicy_ !== undefined) {\n this.image_.referrerPolicy = this.referrerPolicy_;\n }\n }\n\n /**\n * @private\n * @type {?function():void}\n */\n this.unlisten_ = null;\n\n /**\n * @private\n * @type {import(\"./Tile.js\").LoadFunction}\n */\n this.tileLoadFunction_ = tileLoadFunction;\n }\n\n /**\n * Get the HTML image element for this tile (may be a Canvas, OffscreenCanvas, Image, or Video).\n * @return {HTMLCanvasElement|OffscreenCanvas|HTMLImageElement|HTMLVideoElement} Image.\n * @api\n */\n getImage() {\n return this.image_;\n }\n\n /**\n * Sets an HTML image element for this tile (may be a Canvas or preloaded Image).\n * @param {HTMLCanvasElement|OffscreenCanvas|HTMLImageElement} element Element.\n */\n setImage(element) {\n this.image_ = element;\n this.state = TileState.LOADED;\n this.unlistenImage_();\n this.changed();\n }\n\n /**\n * Get the cross origin of the ImageTile.\n * @return {string} Cross origin.\n */\n getCrossOrigin() {\n return this.crossOrigin_;\n }\n\n /**\n * Get the referrer policy of the ImageTile.\n * @return {ReferrerPolicy} Referrer policy.\n */\n getReferrerPolicy() {\n return this.referrerPolicy_;\n }\n\n /**\n * Tracks loading or read errors.\n *\n * @private\n */\n handleImageError_() {\n this.state = TileState.ERROR;\n this.unlistenImage_();\n this.image_ = getBlankImage();\n this.changed();\n }\n\n /**\n * Tracks successful image load.\n *\n * @private\n */\n handleImageLoad_() {\n if (WORKER_OFFSCREEN_CANVAS) {\n // OffscreenCanvas does not have naturalWidth and naturalHeight\n this.state = TileState.LOADED;\n } else {\n const image = /** @type {HTMLImageElement} */ (this.image_);\n if (image.naturalWidth && image.naturalHeight) {\n this.state = TileState.LOADED;\n } else {\n this.state = TileState.EMPTY;\n }\n }\n this.unlistenImage_();\n this.changed();\n }\n\n /**\n * Load the image or retry if loading previously failed.\n * Loading is taken care of by the tile queue, and calling this method is\n * only needed for preloading or for reloading in case of an error.\n *\n * To retry loading tiles on failed requests, use a custom `tileLoadFunction`\n * that checks for error status codes and reloads only when the status code is\n * 408, 429, 500, 502, 503 and 504, and only when not too many retries have been\n * made already:\n *\n * ```js\n * const retryCodes = [408, 429, 500, 502, 503, 504];\n * const retries = {};\n * source.setTileLoadFunction((tile, src) => {\n * const image = tile.getImage();\n * fetch(src)\n * .then((response) => {\n * if (retryCodes.includes(response.status)) {\n * retries[src] = (retries[src] || 0) + 1;\n * if (retries[src] <= 3) {\n * setTimeout(() => tile.load(), retries[src] * 1000);\n * }\n * return Promise.reject();\n * }\n * return response.blob();\n * })\n * .then((blob) => {\n * const imageUrl = URL.createObjectURL(blob);\n * image.src = imageUrl;\n * setTimeout(() => URL.revokeObjectURL(imageUrl), 5000);\n * })\n * .catch(() => tile.setState(3)); // error\n * });\n * ```\n * @api\n * @override\n */\n load() {\n if (this.state == TileState.ERROR) {\n this.state = TileState.IDLE;\n this.image_ = new Image();\n if (this.crossOrigin_ !== null) {\n this.image_.crossOrigin = this.crossOrigin_;\n }\n if (this.referrerPolicy_ !== undefined) {\n this.image_.referrerPolicy = this.referrerPolicy_;\n }\n }\n if (this.state == TileState.IDLE) {\n this.state = TileState.LOADING;\n this.changed();\n this.tileLoadFunction_(this, this.src_);\n this.unlisten_ = listenImage(\n this.image_,\n this.handleImageLoad_.bind(this),\n this.handleImageError_.bind(this),\n );\n }\n }\n\n /**\n * Discards event handlers which listen for load completion or errors.\n *\n * @private\n */\n unlistenImage_() {\n if (this.unlisten_) {\n this.unlisten_();\n this.unlisten_ = null;\n }\n }\n\n /**\n * @override\n */\n disposeInternal() {\n this.unlistenImage_();\n this.image_ = null;\n super.disposeInternal();\n }\n}\n\n/**\n * Get a 1-pixel blank image.\n * @return {HTMLCanvasElement|OffscreenCanvas} Blank image.\n */\nfunction getBlankImage() {\n const ctx = createCanvasContext2D(1, 1);\n ctx.fillStyle = 'rgba(0,0,0,0)';\n ctx.fillRect(0, 0, 1, 1);\n return ctx.canvas;\n}\n\nexport default ImageTile;\n","/**\n * @module ol/Kinetic\n */\n\n/**\n * @classdesc\n * Implementation of inertial deceleration for map movement.\n *\n * @api\n */\nclass Kinetic {\n /**\n * @param {number} decay Rate of decay (must be negative).\n * @param {number} minVelocity Minimum velocity (pixels/millisecond).\n * @param {number} delay Delay to consider to calculate the kinetic\n * initial values (milliseconds).\n */\n constructor(decay, minVelocity, delay) {\n /**\n * @private\n * @type {number}\n */\n this.decay_ = decay;\n\n /**\n * @private\n * @type {number}\n */\n this.minVelocity_ = minVelocity;\n\n /**\n * @private\n * @type {number}\n */\n this.delay_ = delay;\n\n /**\n * @private\n * @type {Array}\n */\n this.points_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.angle_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.initialVelocity_ = 0;\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n begin() {\n this.points_.length = 0;\n this.angle_ = 0;\n this.initialVelocity_ = 0;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n */\n update(x, y) {\n this.points_.push(x, y, Date.now());\n }\n\n /**\n * @return {boolean} Whether we should do kinetic animation.\n */\n end() {\n if (this.points_.length < 6) {\n // at least 2 points are required (i.e. there must be at least 6 elements\n // in the array)\n return false;\n }\n const delay = Date.now() - this.delay_;\n const lastIndex = this.points_.length - 3;\n if (this.points_[lastIndex + 2] < delay) {\n // the last tracked point is too old, which means that the user stopped\n // panning before releasing the map\n return false;\n }\n\n // get the first point which still falls into the delay time\n let firstIndex = lastIndex - 3;\n while (firstIndex > 0 && this.points_[firstIndex + 2] > delay) {\n firstIndex -= 3;\n }\n\n const duration = this.points_[lastIndex + 2] - this.points_[firstIndex + 2];\n // we don't want a duration of 0 (divide by zero)\n // we also make sure the user panned for a duration of at least one frame\n // (1/60s) to compute sane displacement values\n if (duration < 1000 / 60) {\n return false;\n }\n\n const dx = this.points_[lastIndex] - this.points_[firstIndex];\n const dy = this.points_[lastIndex + 1] - this.points_[firstIndex + 1];\n this.angle_ = Math.atan2(dy, dx);\n this.initialVelocity_ = Math.sqrt(dx * dx + dy * dy) / duration;\n return this.initialVelocity_ > this.minVelocity_;\n }\n\n /**\n * @return {number} Total distance travelled (pixels).\n */\n getDistance() {\n return (this.minVelocity_ - this.initialVelocity_) / this.decay_;\n }\n\n /**\n * @return {number} Angle of the kinetic panning animation (radians).\n */\n getAngle() {\n return this.angle_;\n }\n}\n\nexport default Kinetic;\n","/**\n * @module ol/geom/flat/interpolate\n */\nimport {binarySearch} from '../../array.js';\nimport {lerp} from '../../math.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} fraction Fraction.\n * @param {Array} [dest] Destination.\n * @param {number} [dimension] Destination dimension (default is `2`)\n * @return {Array} Destination.\n */\nexport function interpolatePoint(\n flatCoordinates,\n offset,\n end,\n stride,\n fraction,\n dest,\n dimension,\n) {\n let o, t;\n const n = (end - offset) / stride;\n if (n === 1) {\n o = offset;\n } else if (n === 2) {\n o = offset;\n t = fraction;\n } else if (n !== 0) {\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n let length = 0;\n const cumulativeLengths = [0];\n for (let i = offset + stride; i < end; i += stride) {\n const x2 = flatCoordinates[i];\n const y2 = flatCoordinates[i + 1];\n length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n cumulativeLengths.push(length);\n x1 = x2;\n y1 = y2;\n }\n const target = fraction * length;\n const index = binarySearch(cumulativeLengths, target);\n if (index < 0) {\n t =\n (target - cumulativeLengths[-index - 2]) /\n (cumulativeLengths[-index - 1] - cumulativeLengths[-index - 2]);\n o = offset + (-index - 2) * stride;\n } else {\n o = offset + index * stride;\n }\n }\n dimension = dimension > 1 ? dimension : 2;\n dest = dest ? dest : new Array(dimension);\n for (let i = 0; i < dimension; ++i) {\n dest[i] =\n o === undefined\n ? NaN\n : t === undefined\n ? flatCoordinates[o + i]\n : lerp(flatCoordinates[o + i], flatCoordinates[o + stride + i], t);\n }\n return dest;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @return {import(\"../../coordinate.js\").Coordinate|null} Coordinate.\n */\nexport function lineStringCoordinateAtM(\n flatCoordinates,\n offset,\n end,\n stride,\n m,\n extrapolate,\n) {\n if (end == offset) {\n return null;\n }\n let coordinate;\n if (m < flatCoordinates[offset + stride - 1]) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(offset, offset + stride);\n coordinate[stride - 1] = m;\n return coordinate;\n }\n return null;\n }\n if (flatCoordinates[end - 1] < m) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(end - stride, end);\n coordinate[stride - 1] = m;\n return coordinate;\n }\n return null;\n }\n // FIXME use O(1) search\n if (m == flatCoordinates[offset + stride - 1]) {\n return flatCoordinates.slice(offset, offset + stride);\n }\n let lo = offset / stride;\n let hi = end / stride;\n while (lo < hi) {\n const mid = (lo + hi) >> 1;\n if (m < flatCoordinates[(mid + 1) * stride - 1]) {\n hi = mid;\n } else {\n lo = mid + 1;\n }\n }\n const m0 = flatCoordinates[lo * stride - 1];\n if (m == m0) {\n return flatCoordinates.slice((lo - 1) * stride, (lo - 1) * stride + stride);\n }\n const m1 = flatCoordinates[(lo + 1) * stride - 1];\n const t = (m - m0) / (m1 - m0);\n coordinate = [];\n for (let i = 0; i < stride - 1; ++i) {\n coordinate.push(\n lerp(\n flatCoordinates[(lo - 1) * stride + i],\n flatCoordinates[lo * stride + i],\n t,\n ),\n );\n }\n coordinate.push(m);\n return coordinate;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @param {boolean} interpolate Interpolate.\n * @return {import(\"../../coordinate.js\").Coordinate|null} Coordinate.\n */\nexport function lineStringsCoordinateAtM(\n flatCoordinates,\n offset,\n ends,\n stride,\n m,\n extrapolate,\n interpolate,\n) {\n if (interpolate) {\n return lineStringCoordinateAtM(\n flatCoordinates,\n offset,\n ends[ends.length - 1],\n stride,\n m,\n extrapolate,\n );\n }\n let coordinate;\n if (m < flatCoordinates[stride - 1]) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(0, stride);\n coordinate[stride - 1] = m;\n return coordinate;\n }\n return null;\n }\n if (flatCoordinates[flatCoordinates.length - 1] < m) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(flatCoordinates.length - stride);\n coordinate[stride - 1] = m;\n return coordinate;\n }\n return null;\n }\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n if (offset == end) {\n continue;\n }\n if (m < flatCoordinates[offset + stride - 1]) {\n return null;\n }\n if (m <= flatCoordinates[end - 1]) {\n return lineStringCoordinateAtM(\n flatCoordinates,\n offset,\n end,\n stride,\n m,\n false,\n );\n }\n offset = end;\n }\n return null;\n}\n","/**\n * @module ol/geom/flat/length\n */\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Length.\n */\nexport function lineStringLength(flatCoordinates, offset, end, stride) {\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n let length = 0;\n for (let i = offset + stride; i < end; i += stride) {\n const x2 = flatCoordinates[i];\n const y2 = flatCoordinates[i + 1];\n length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n x1 = x2;\n y1 = y2;\n }\n return length;\n}\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Perimeter.\n */\nexport function linearRingLength(flatCoordinates, offset, end, stride) {\n let perimeter = lineStringLength(flatCoordinates, offset, end, stride);\n const dx = flatCoordinates[end - stride] - flatCoordinates[offset];\n const dy = flatCoordinates[end - stride + 1] - flatCoordinates[offset + 1];\n perimeter += Math.sqrt(dx * dx + dy * dy);\n return perimeter;\n}\n","/**\n * @module ol/geom/LineString\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {assignClosestPoint, maxSquaredDelta} from './flat/closest.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {interpolatePoint, lineStringCoordinateAtM} from './flat/interpolate.js';\nimport {intersectsLineString} from './flat/intersectsextent.js';\nimport {lineStringLength} from './flat/length.js';\nimport {forEach as forEachSegment} from './flat/segments.js';\nimport {douglasPeucker} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Linestring geometry.\n *\n * @api\n */\nclass LineString extends SimpleGeometry {\n /**\n * @param {Array|Array} coordinates Coordinates.\n * For internal use, flat coordinates in combination with `layout` are also accepted.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n constructor(coordinates, layout) {\n super();\n\n /**\n * @private\n * @type {import(\"../coordinate.js\").Coordinate|null}\n */\n this.flatMidpoint_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.flatMidpointRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n if (layout !== undefined && !Array.isArray(coordinates[0])) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n } else {\n this.setCoordinates(\n /** @type {Array} */ (\n coordinates\n ),\n layout,\n );\n }\n }\n\n /**\n * Append the passed coordinate to the coordinates of the linestring.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @api\n */\n appendCoordinate(coordinate) {\n extend(this.flatCoordinates, coordinate);\n this.changed();\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!LineString} Clone.\n * @api\n * @override\n */\n clone() {\n const lineString = new LineString(\n this.flatCoordinates.slice(),\n this.layout,\n );\n lineString.applyProperties(this);\n return lineString;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n maxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n 0,\n ),\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestPoint(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n this.maxDelta_,\n false,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n );\n }\n\n /**\n * Iterate over each segment, calling the provided callback.\n * If the callback returns a truthy value the function returns that\n * value immediately. Otherwise the function returns `false`.\n *\n * @param {function(this: S, import(\"../coordinate.js\").Coordinate, import(\"../coordinate.js\").Coordinate): T} callback Function\n * called for each segment. The function will receive two arguments, the start and end coordinates of the segment.\n * @return {T|boolean} Value.\n * @template T,S\n * @api\n */\n forEachSegment(callback) {\n return forEachSegment(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n callback,\n );\n }\n\n /**\n * Returns the coordinate at `m` using linear interpolation, or `null` if no\n * such coordinate exists.\n *\n * `extrapolate` controls extrapolation beyond the range of Ms in the\n * MultiLineString. If `extrapolate` is `true` then Ms less than the first\n * M will return the first coordinate and Ms greater than the last M will\n * return the last coordinate.\n *\n * @param {number} m M.\n * @param {boolean} [extrapolate] Extrapolate. Default is `false`.\n * @return {import(\"../coordinate.js\").Coordinate|null} Coordinate.\n * @api\n */\n getCoordinateAtM(m, extrapolate) {\n if (this.layout != 'XYM' && this.layout != 'XYZM') {\n return null;\n }\n extrapolate = extrapolate !== undefined ? extrapolate : false;\n return lineStringCoordinateAtM(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n m,\n extrapolate,\n );\n }\n\n /**\n * Return the coordinates of the linestring.\n * @return {Array} Coordinates.\n * @api\n * @override\n */\n getCoordinates() {\n return inflateCoordinates(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n );\n }\n\n /**\n * Return the coordinate at the provided fraction along the linestring.\n * The `fraction` is a number between 0 and 1, where 0 is the start of the\n * linestring and 1 is the end.\n * @param {number} fraction Fraction.\n * @param {import(\"../coordinate.js\").Coordinate} [dest] Optional coordinate whose values will\n * be modified. If not provided, a new coordinate will be returned.\n * @return {import(\"../coordinate.js\").Coordinate} Coordinate of the interpolated point.\n * @api\n */\n getCoordinateAt(fraction, dest) {\n return interpolatePoint(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n fraction,\n dest,\n this.stride,\n );\n }\n\n /**\n * Return the length of the linestring on projected plane.\n * @return {number} Length (on projected plane).\n * @api\n */\n getLength() {\n return lineStringLength(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n );\n }\n\n /**\n * @return {Array} Flat midpoint.\n */\n getFlatMidpoint() {\n if (this.flatMidpointRevision_ != this.getRevision()) {\n this.flatMidpoint_ = this.getCoordinateAt(\n 0.5,\n this.flatMidpoint_ ?? undefined,\n );\n this.flatMidpointRevision_ = this.getRevision();\n }\n return /** @type {Array} */ (this.flatMidpoint_);\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {LineString} Simplified LineString.\n * @protected\n * @override\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n /** @type {Array} */\n const simplifiedFlatCoordinates = [];\n simplifiedFlatCoordinates.length = douglasPeucker(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n );\n return new LineString(simplifiedFlatCoordinates, 'XY');\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'LineString';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return intersectsLineString(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n extent,\n this.getExtent(),\n );\n }\n\n /**\n * Set the coordinates of the linestring.\n * @param {!Array} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 1);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinates(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n );\n this.changed();\n }\n}\n\nexport default LineString;\n","/**\n * @module ol/color\n */\nimport {createCanvasContext2D} from './dom.js';\nimport {clamp, toFixed} from './math.js';\n\n/**\n * A color represented as a short array [red, green, blue, alpha].\n * red, green, and blue should be integers in the range 0..255 inclusive.\n * alpha should be a float in the range 0..1 inclusive. If no alpha value is\n * given then `1` will be used.\n * @typedef {Array} Color\n * @api\n */\n\n/**\n * Color to indicate that no color should be rendered. This is meant to be used for per-reference\n * comparisons only.\n * @type {Color}\n */\nexport const NO_COLOR = [NaN, NaN, NaN, 0];\n\nlet colorParseContext;\n/**\n * @return {CanvasRenderingContext2D} The color parse context\n */\nfunction getColorParseContext() {\n if (!colorParseContext) {\n colorParseContext = createCanvasContext2D(1, 1, undefined, {\n willReadFrequently: true,\n desynchronized: true,\n });\n }\n return colorParseContext;\n}\n\nconst rgbModernRegEx =\n /^rgba?\\(\\s*(\\d+%?)\\s+(\\d+%?)\\s+(\\d+%?)(?:\\s*\\/\\s*(\\d+%|\\d*\\.\\d+|[01]))?\\s*\\)$/i;\nconst rgbLegacyAbsoluteRegEx =\n /^rgba?\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)(?:\\s*,\\s*(\\d+%|\\d*\\.\\d+|[01]))?\\s*\\)$/i;\nconst rgbLegacyPercentageRegEx =\n /^rgba?\\(\\s*(\\d+%)\\s*,\\s*(\\d+%)\\s*,\\s*(\\d+%)(?:\\s*,\\s*(\\d+%|\\d*\\.\\d+|[01]))?\\s*\\)$/i;\nconst hexRegEx = /^#([\\da-f]{3,4}|[\\da-f]{6}|[\\da-f]{8})$/i;\n\n/**\n * @param {string} s Color component as number or percentage.\n * @param {number} divider Divider for percentage.\n * @return {number} Color component.\n */\nfunction toColorComponent(s, divider) {\n return s.endsWith('%')\n ? Number(s.substring(0, s.length - 1)) / divider\n : Number(s);\n}\n\n/**\n * @param {string} color Color string.\n */\nfunction throwInvalidColor(color) {\n throw new Error('failed to parse \"' + color + '\" as color');\n}\n\n/**\n * @param {string} color Color string.\n * @return {Color} RGBa color array.\n */\nfunction parseRgba(color) {\n // Fast lane for rgb(a) colors\n if (color.toLowerCase().startsWith('rgb')) {\n const rgb =\n color.match(rgbLegacyAbsoluteRegEx) ||\n color.match(rgbModernRegEx) ||\n color.match(rgbLegacyPercentageRegEx);\n if (rgb) {\n const alpha = rgb[4];\n const rgbDivider = 100 / 255;\n return [\n clamp((toColorComponent(rgb[1], rgbDivider) + 0.5) | 0, 0, 255),\n clamp((toColorComponent(rgb[2], rgbDivider) + 0.5) | 0, 0, 255),\n clamp((toColorComponent(rgb[3], rgbDivider) + 0.5) | 0, 0, 255),\n alpha !== undefined ? clamp(toColorComponent(alpha, 100), 0, 1) : 1,\n ];\n }\n throwInvalidColor(color);\n }\n // Fast lane for hex colors (also with alpha)\n if (color.startsWith('#')) {\n if (hexRegEx.test(color)) {\n const hex = color.substring(1);\n const step = hex.length <= 4 ? 1 : 2;\n const colorFromHex = [0, 0, 0, 255];\n for (let i = 0, ii = hex.length; i < ii; i += step) {\n let colorComponent = parseInt(hex.substring(i, i + step), 16);\n if (step === 1) {\n colorComponent += colorComponent << 4;\n }\n colorFromHex[i / step] = colorComponent;\n }\n colorFromHex[3] = colorFromHex[3] / 255;\n return colorFromHex;\n }\n throwInvalidColor(color);\n }\n // Use canvas color serialization to parse the color into hex or rgba\n // See https://www.w3.org/TR/2021/SPSD-2dcontext-20210128/#serialization-of-a-color\n const context = getColorParseContext();\n context.fillStyle = '#abcdef';\n let invalidCheckFillStyle = context.fillStyle;\n context.fillStyle = color;\n if (context.fillStyle === invalidCheckFillStyle) {\n context.fillStyle = '#fedcba';\n invalidCheckFillStyle = context.fillStyle;\n context.fillStyle = color;\n if (context.fillStyle === invalidCheckFillStyle) {\n throwInvalidColor(color);\n }\n }\n const colorString = context.fillStyle;\n if (colorString.startsWith('#') || colorString.startsWith('rgba')) {\n return parseRgba(colorString);\n }\n context.clearRect(0, 0, 1, 1);\n context.fillRect(0, 0, 1, 1);\n const colorFromImage = Array.from(context.getImageData(0, 0, 1, 1).data);\n colorFromImage[3] = toFixed(colorFromImage[3] / 255, 3);\n return colorFromImage;\n}\n\n/**\n * Return the color as an rgba string.\n * @param {Color|string} color Color.\n * @return {string} Rgba string.\n * @api\n */\nexport function asString(color) {\n if (typeof color === 'string') {\n return color;\n }\n return toString(color);\n}\n\n/**\n * @type {number}\n */\nconst MAX_CACHE_SIZE = 1024;\n\n/**\n * We maintain a small cache of parsed strings. Whenever the cache grows too large,\n * we delete an arbitrary set of the entries.\n *\n * @type {Object}\n */\nconst cache = {};\n\n/**\n * @type {number}\n */\nlet cacheSize = 0;\n\n/**\n * @param {Color} color A color that may or may not have an alpha channel.\n * @return {Color} The input color with an alpha channel. If the input color has\n * an alpha channel, the input color will be returned unchanged. Otherwise, a new\n * array will be returned with the input color and an alpha channel of 1.\n */\nexport function withAlpha(color) {\n if (color.length === 4) {\n return color;\n }\n const output = color.slice();\n output[3] = 1;\n return output;\n}\n\n// The functions b1, b2, a1, a2, rgbaToLcha and lchaToRgba below are adapted from\n// https://stackoverflow.com/a/67219995/2389327\n\n/**\n * @param {number} v Input value.\n * @return {number} Output value.\n */\nfunction b1(v) {\n return v > 0.0031308 ? Math.pow(v, 1 / 2.4) * 269.025 - 14.025 : v * 3294.6;\n}\n\n/**\n * @param {number} v Input value.\n * @return {number} Output value.\n */\nfunction b2(v) {\n return v > 0.2068965 ? Math.pow(v, 3) : (v - 4 / 29) * (108 / 841);\n}\n\n/**\n * @param {number} v Input value.\n * @return {number} Output value.\n */\nfunction a1(v) {\n return v > 10.314724 ? Math.pow((v + 14.025) / 269.025, 2.4) : v / 3294.6;\n}\n\n/**\n * @param {number} v Input value.\n * @return {number} Output value.\n */\nfunction a2(v) {\n return v > 0.0088564 ? Math.pow(v, 1 / 3) : v / (108 / 841) + 4 / 29;\n}\n\n/**\n * @param {Color} color RGBA color.\n * @return {Color} LCHuv color with alpha.\n */\nexport function rgbaToLcha(color) {\n const r = a1(color[0]);\n const g = a1(color[1]);\n const b = a1(color[2]);\n const y = a2(r * 0.222488403 + g * 0.716873169 + b * 0.06060791);\n const l = 500 * (a2(r * 0.452247074 + g * 0.399439023 + b * 0.148375274) - y);\n const q = 200 * (y - a2(r * 0.016863605 + g * 0.117638439 + b * 0.865350722));\n const h = Math.atan2(q, l) * (180 / Math.PI);\n return [\n 116 * y - 16,\n Math.sqrt(l * l + q * q),\n h < 0 ? h + 360 : h,\n color[3],\n ];\n}\n\n/**\n * @param {Color} color LCHuv color with alpha.\n * @return {Color} RGBA color.\n */\nexport function lchaToRgba(color) {\n const l = (color[0] + 16) / 116;\n const c = color[1];\n const h = (color[2] * Math.PI) / 180;\n const y = b2(l);\n const x = b2(l + (c / 500) * Math.cos(h));\n const z = b2(l - (c / 200) * Math.sin(h));\n const r = b1(x * 3.021973625 - y * 1.617392459 - z * 0.404875592);\n const g = b1(x * -0.943766287 + y * 1.916279586 + z * 0.027607165);\n const b = b1(x * 0.069407491 - y * 0.22898585 + z * 1.159737864);\n return [\n clamp((r + 0.5) | 0, 0, 255),\n clamp((g + 0.5) | 0, 0, 255),\n clamp((b + 0.5) | 0, 0, 255),\n color[3],\n ];\n}\n\n/**\n * @param {string} s String.\n * @return {Color} Color.\n */\nexport function fromString(s) {\n if (s === 'none') {\n return NO_COLOR;\n }\n if (cache.hasOwnProperty(s)) {\n return cache[s];\n }\n if (cacheSize >= MAX_CACHE_SIZE) {\n let i = 0;\n for (const key in cache) {\n if ((i++ & 3) === 0) {\n delete cache[key];\n --cacheSize;\n }\n }\n }\n\n const color = parseRgba(s);\n if (color.length !== 4) {\n throwInvalidColor(s);\n }\n for (const c of color) {\n if (isNaN(c)) {\n throwInvalidColor(s);\n }\n }\n cache[s] = color;\n ++cacheSize;\n return color;\n}\n\n/**\n * Return the color as an array. This function maintains a cache of calculated\n * arrays which means the result should not be modified.\n * @param {Color|string} color Color.\n * @return {Color} Color.\n * @api\n */\nexport function asArray(color) {\n if (Array.isArray(color)) {\n return color;\n }\n return fromString(color);\n}\n\n/**\n * @param {Color} color Color.\n * @return {string} String.\n */\nexport function toString(color) {\n let r = color[0];\n if (r != (r | 0)) {\n r = (r + 0.5) | 0;\n }\n let g = color[1];\n if (g != (g | 0)) {\n g = (g + 0.5) | 0;\n }\n let b = color[2];\n if (b != (b | 0)) {\n b = (b + 0.5) | 0;\n }\n const a = color[3] === undefined ? 1 : Math.round(color[3] * 1000) / 1000;\n return 'rgba(' + r + ',' + g + ',' + b + ',' + a + ')';\n}\n\n/**\n * @param {string} s String.\n * @return {boolean} Whether the string is actually a valid color\n */\nexport function isStringColor(s) {\n try {\n fromString(s);\n return true;\n } catch {\n return false;\n }\n}\n","/**\n * @module ol/style/IconImageCache\n */\nimport ImageState from '../ImageState.js';\nimport {asArray} from '../color.js';\nimport {getSharedCanvasContext2D} from '../dom.js';\n\n/**\n * @classdesc\n * Singleton class. Available through {@link module:ol/style/IconImageCache.shared}.\n */\nclass IconImageCache {\n constructor() {\n /**\n * @type {!Object}\n * @private\n */\n this.cache_ = {};\n\n /**\n * @type {!Object}\n * @private\n */\n this.patternCache_ = {};\n\n /**\n * @type {number}\n * @private\n */\n this.cacheSize_ = 0;\n\n /**\n * @type {number}\n * @private\n */\n this.maxCacheSize_ = 1024;\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n clear() {\n this.cache_ = {};\n this.patternCache_ = {};\n this.cacheSize_ = 0;\n }\n\n /**\n * @return {boolean} Can expire cache.\n */\n canExpireCache() {\n return this.cacheSize_ > this.maxCacheSize_;\n }\n\n /**\n * FIXME empty description for jsdoc\n */\n expire() {\n if (this.canExpireCache()) {\n let i = 0;\n for (const key in this.cache_) {\n const iconImage = this.cache_[key];\n if ((i++ & 3) === 0 && !iconImage.hasListener()) {\n delete this.cache_[key];\n delete this.patternCache_[key];\n --this.cacheSize_;\n }\n }\n }\n }\n\n /**\n * @param {string} src Src.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n * @return {import(\"./IconImage.js\").default} Icon image.\n */\n get(src, color) {\n const key = getCacheKey(src, color);\n\n const icon = key in this.cache_ ? this.cache_[key] : null;\n return icon;\n }\n\n /**\n * @param {string} src Src.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n * @return {CanvasPattern} Icon image.\n */\n getPattern(src, color) {\n const key = getCacheKey(src, color);\n return key in this.patternCache_ ? this.patternCache_[key] : null;\n }\n\n /**\n * @param {string} src Src.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n * @param {import(\"./IconImage.js\").default|null} iconImage Icon image.\n * @param {boolean} [pattern] Also cache a `'repeat'` pattern with this `iconImage`.\n */\n set(src, color, iconImage, pattern) {\n const key = getCacheKey(src, color);\n const update = key in this.cache_;\n this.cache_[key] = iconImage;\n if (pattern) {\n if (iconImage.getImageState() === ImageState.IDLE) {\n iconImage.load();\n }\n if (iconImage.getImageState() === ImageState.LOADING) {\n iconImage.ready().then(() => {\n this.patternCache_[key] = getSharedCanvasContext2D().createPattern(\n iconImage.getImage(1),\n 'repeat',\n );\n });\n } else {\n this.patternCache_[key] = getSharedCanvasContext2D().createPattern(\n iconImage.getImage(1),\n 'repeat',\n );\n }\n }\n if (!update) {\n ++this.cacheSize_;\n }\n }\n\n /**\n * Set the cache size of the icon cache. Default is `1024`. Change this value when\n * your map uses more than 1024 different icon images and you are not caching icon\n * styles on the application level.\n * @param {number} maxCacheSize Cache max size.\n * @api\n */\n setSize(maxCacheSize) {\n this.maxCacheSize_ = maxCacheSize;\n this.expire();\n }\n}\n\n/**\n * @param {string} src Src.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n * @return {string} Cache key.\n */\nexport function getCacheKey(src, color) {\n const colorString = color ? asArray(color) : 'null';\n return src + ':' + colorString;\n}\n\nexport default IconImageCache;\n\n/**\n * The {@link module:ol/style/IconImageCache~IconImageCache} for\n * {@link module:ol/style/Icon~Icon} images.\n * @api\n */\nexport const shared = new IconImageCache();\n","/**\n * @module ol/style/IconImage\n */\n\nimport {decodeFallback} from '../Image.js';\nimport ImageState from '../ImageState.js';\nimport {asString} from '../color.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport EventType from '../events/EventType.js';\nimport EventTarget from '../events/Target.js';\nimport {shared as iconImageCache} from './IconImageCache.js';\n\n/**\n * @type {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D}\n */\nlet taintedTestContext = null;\n\nclass IconImage extends EventTarget {\n /**\n * @param {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap|null} image Image.\n * @param {string|undefined} src Src.\n * @param {import('../dom.js').ImageAttributes} imageAttributes Image attributes options.\n * @param {import(\"../ImageState.js\").default|undefined} imageState Image state.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n */\n constructor(image, src, imageAttributes, imageState, color) {\n super();\n\n /**\n * @private\n * @type {HTMLImageElement|OffscreenCanvas|HTMLCanvasElement|ImageBitmap}\n */\n this.hitDetectionImage_ = null;\n\n /**\n * @private\n * @type {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap|null}\n */\n this.image_ = image;\n\n /**\n * @private\n * @type {string|null}\n */\n this.crossOrigin_ = imageAttributes?.crossOrigin;\n\n /**\n * @private\n * @type {ReferrerPolicy}\n */\n this.referrerPolicy_ = imageAttributes?.referrerPolicy;\n\n /**\n * @private\n * @type {Object}\n */\n this.canvas_ = {};\n\n /**\n * @private\n * @type {import(\"../color.js\").Color|string|null}\n */\n this.color_ = color;\n\n /**\n * @private\n * @type {import(\"../ImageState.js\").default}\n */\n this.imageState_ = imageState === undefined ? ImageState.IDLE : imageState;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size|null}\n */\n this.size_ =\n image && image.width && image.height ? [image.width, image.height] : null;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.src_ = src;\n\n /**\n * @private\n */\n this.tainted_;\n\n /**\n * @private\n * @type {Promise|null}\n */\n this.ready_ = null;\n }\n\n /**\n * @private\n */\n initializeImage_() {\n this.image_ = new Image();\n if (this.crossOrigin_ !== null) {\n this.image_.crossOrigin = this.crossOrigin_;\n }\n if (this.referrerPolicy_ !== undefined) {\n this.image_.referrerPolicy = this.referrerPolicy_;\n }\n }\n\n /**\n * @private\n * @return {boolean} The image canvas is tainted.\n */\n isTainted_() {\n if (this.tainted_ === undefined && this.imageState_ === ImageState.LOADED) {\n if (!taintedTestContext) {\n taintedTestContext = createCanvasContext2D(1, 1, undefined, {\n willReadFrequently: true,\n });\n }\n taintedTestContext.drawImage(this.image_, 0, 0);\n try {\n taintedTestContext.getImageData(0, 0, 1, 1);\n this.tainted_ = false;\n } catch {\n taintedTestContext = null;\n this.tainted_ = true;\n }\n }\n return this.tainted_ === true;\n }\n\n /**\n * @private\n */\n dispatchChangeEvent_() {\n this.dispatchEvent(EventType.CHANGE);\n }\n\n /**\n * @private\n */\n handleImageError_() {\n this.imageState_ = ImageState.ERROR;\n this.dispatchChangeEvent_();\n }\n\n /**\n * @private\n */\n handleImageLoad_() {\n this.imageState_ = ImageState.LOADED;\n this.size_ = [this.image_.width, this.image_.height];\n this.dispatchChangeEvent_();\n }\n\n /**\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap} Image or Canvas element or image bitmap.\n */\n getImage(pixelRatio) {\n if (!this.image_) {\n this.initializeImage_();\n }\n this.replaceColor_(pixelRatio);\n return this.canvas_[pixelRatio] ? this.canvas_[pixelRatio] : this.image_;\n }\n\n /**\n * @param {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap} image Image.\n */\n setImage(image) {\n this.image_ = image;\n }\n\n /**\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Image or Canvas element.\n */\n getPixelRatio(pixelRatio) {\n this.replaceColor_(pixelRatio);\n return this.canvas_[pixelRatio] ? pixelRatio : 1;\n }\n\n /**\n * @return {import(\"../ImageState.js\").default} Image state.\n */\n getImageState() {\n return this.imageState_;\n }\n\n /**\n * @return {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap} Image element.\n */\n getHitDetectionImage() {\n if (!this.image_) {\n this.initializeImage_();\n }\n if (!this.hitDetectionImage_) {\n if (this.isTainted_()) {\n const width = this.size_[0];\n const height = this.size_[1];\n const context = createCanvasContext2D(width, height);\n context.fillRect(0, 0, width, height);\n this.hitDetectionImage_ = context.canvas;\n } else {\n this.hitDetectionImage_ = this.image_;\n }\n }\n return this.hitDetectionImage_;\n }\n\n /**\n * Get the size of the icon (in pixels).\n * @return {import(\"../size.js\").Size} Image size.\n */\n getSize() {\n return this.size_;\n }\n\n /**\n * @return {string|undefined} Image src.\n */\n getSrc() {\n return this.src_;\n }\n\n /**\n * Load not yet loaded URI.\n */\n load() {\n if (this.imageState_ !== ImageState.IDLE) {\n return;\n }\n if (!this.image_) {\n this.initializeImage_();\n }\n\n this.imageState_ = ImageState.LOADING;\n try {\n if (this.src_ !== undefined) {\n /** @type {HTMLImageElement} */ (this.image_).src = this.src_;\n }\n } catch {\n this.handleImageError_();\n }\n if (this.image_ instanceof HTMLImageElement) {\n decodeFallback(this.image_, this.src_)\n .then((image) => {\n this.image_ = image;\n this.handleImageLoad_();\n })\n .catch(this.handleImageError_.bind(this));\n }\n }\n\n /**\n * @param {number} pixelRatio Pixel ratio.\n * @private\n */\n replaceColor_(pixelRatio) {\n if (\n !this.color_ ||\n this.canvas_[pixelRatio] ||\n this.imageState_ !== ImageState.LOADED\n ) {\n return;\n }\n\n const image = this.image_;\n const ctx = createCanvasContext2D(\n Math.ceil(image.width * pixelRatio),\n Math.ceil(image.height * pixelRatio),\n );\n const canvas = ctx.canvas;\n\n ctx.scale(pixelRatio, pixelRatio);\n ctx.drawImage(image, 0, 0);\n\n ctx.globalCompositeOperation = 'multiply';\n ctx.fillStyle = asString(this.color_);\n ctx.fillRect(0, 0, canvas.width / pixelRatio, canvas.height / pixelRatio);\n\n ctx.globalCompositeOperation = 'destination-in';\n ctx.drawImage(image, 0, 0);\n\n this.canvas_[pixelRatio] = canvas;\n }\n\n /**\n * @return {Promise} Promise that resolves when the image is loaded.\n */\n ready() {\n if (!this.ready_) {\n this.ready_ = new Promise((resolve) => {\n if (\n this.imageState_ === ImageState.LOADED ||\n this.imageState_ === ImageState.ERROR\n ) {\n resolve();\n } else {\n const onChange = () => {\n if (\n this.imageState_ === ImageState.LOADED ||\n this.imageState_ === ImageState.ERROR\n ) {\n this.removeEventListener(EventType.CHANGE, onChange);\n resolve();\n }\n };\n this.addEventListener(EventType.CHANGE, onChange);\n }\n });\n }\n return this.ready_;\n }\n}\n\n/**\n * @param {HTMLImageElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap|null} image Image.\n * @param {string|undefined} src Src.\n * @param {import('../dom.js').ImageAttributes} imageAttributes Image attributes options.\n * @param {import(\"../ImageState.js\").default|undefined} imageState Image state.\n * @param {import(\"../color.js\").Color|string|null} color Color.\n * @param {boolean} [pattern] Also cache a `repeat` pattern with the icon image.\n * @return {IconImage} Icon image.\n */\nexport function get(image, src, imageAttributes, imageState, color, pattern) {\n let iconImage =\n src === undefined ? undefined : iconImageCache.get(src, color);\n if (!iconImage) {\n iconImage = new IconImage(\n image,\n image && 'src' in image ? image.src || undefined : src,\n imageAttributes,\n imageState,\n color,\n );\n iconImageCache.set(src, color, iconImage, pattern);\n }\n if (pattern && iconImage && !iconImageCache.getPattern(src, color)) {\n iconImageCache.set(src, color, iconImage, pattern);\n }\n return iconImage;\n}\n\nexport default IconImage;\n","/**\n * @module ol/colorlike\n */\nimport ImageState from './ImageState.js';\nimport {toString} from './color.js';\nimport {createCanvasContext2D} from './dom.js';\nimport {get as getIconImage} from './style/IconImage.js';\nimport {shared as iconCache} from './style/IconImageCache.js';\n\n/**\n * @typedef {Object} PatternDescriptor\n * @property {string} src Pattern image URL\n * @property {import(\"./color.js\").Color|string} [color] Color to tint the pattern with.\n * @property {import(\"./size.js\").Size} [size] Size of the desired slice from the pattern image.\n * Use this together with `offset` when the pattern image is a sprite sheet.\n * @property {import(\"./size.js\").Size} [offset] Offset of the desired slice from the pattern image.\n * Use this together with `size` when the pattern image is a sprite sheet.\n */\n\n/**\n * A type accepted by CanvasRenderingContext2D.fillStyle\n * or CanvasRenderingContext2D.strokeStyle.\n * Represents a color, [CanvasPattern](https://developer.mozilla.org/en-US/docs/Web/API/CanvasPattern),\n * or [CanvasGradient](https://developer.mozilla.org/en-US/docs/Web/API/CanvasGradient). The origin for\n * patterns and gradients as fill style is an increment of 512 css pixels from map coordinate\n * `[0, 0]`. For seamless repeat patterns, width and height of the pattern image\n * must be a factor of two (2, 4, 8, ..., 512).\n *\n * @typedef {string|CanvasPattern|CanvasGradient} ColorLike\n * @api\n */\n\n/**\n * @param {import(\"./color.js\").Color|ColorLike|PatternDescriptor|null} color Color.\n * @return {ColorLike|null} The color as an {@link ol/colorlike~ColorLike}.\n * @api\n */\nexport function asColorLike(color) {\n if (!color) {\n return null;\n }\n if (Array.isArray(color)) {\n return toString(color);\n }\n if (typeof color === 'object' && 'src' in color) {\n return asCanvasPattern(color);\n }\n return color;\n}\n\n/**\n * @param {PatternDescriptor} pattern Pattern descriptor.\n * @return {CanvasPattern|null} Canvas pattern or null if the pattern referenced in the\n * PatternDescriptor was not found in the icon image cache.\n */\nfunction asCanvasPattern(pattern) {\n if (!pattern.offset || !pattern.size) {\n return iconCache.getPattern(pattern.src, pattern.color);\n }\n\n const cacheKey = pattern.src + ':' + pattern.offset;\n\n const canvasPattern = iconCache.getPattern(cacheKey, pattern.color);\n if (canvasPattern) {\n return canvasPattern;\n }\n\n const iconImage = iconCache.get(pattern.src, null);\n if (iconImage.getImageState() !== ImageState.LOADED) {\n return null;\n }\n const patternCanvasContext = createCanvasContext2D(\n pattern.size[0],\n pattern.size[1],\n );\n patternCanvasContext.drawImage(\n iconImage.getImage(1),\n pattern.offset[0],\n pattern.offset[1],\n pattern.size[0],\n pattern.size[1],\n 0,\n 0,\n pattern.size[0],\n pattern.size[1],\n );\n getIconImage(\n patternCanvasContext.canvas,\n cacheKey,\n undefined,\n ImageState.LOADED,\n pattern.color,\n true,\n );\n return iconCache.getPattern(cacheKey, pattern.color);\n}\n","import {angleBetween} from '../../coordinate.js';\n\n/**\n * Offsets a line string to the left / right along its segments direction.\n * Offset is applied to each segment of the line in the direciton of the segment normal (positive offset goes \"right\" relative to the line direction).\n * For very sharp angles between segments, the function falls back to offsetting along the segment normal direction to avoid excessively long miters.\n *\n * Coordinates and the offset should be in the same units — either pixels or the same spatial reference system as the input line coordinates.\n *\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} start Start index.\n * @param {number} end End index.\n * @param {number} stride Stride.\n * @param {number} offset Offset distance along the segment normal direction.\n * Positive values offset to the right relative to the direction of the line.\n * Negative values offset to the left.\n * @param {boolean} isClosedRing If coordinates build a closed circle (in this the first and the last coordinate offsets will consider previous / next ring coordinate)\n * @param {Array} [dest] Destination coordinate array. If not provided a new one will be created\n * @param {number} [destinationStride] Stride of destination coordinates. If unspecified, assumed to be same as the source coordinates stride.\n * @return {Array} Result flat coordinates of the offset line.\n */\nexport function offsetLineString(\n flatCoordinates,\n start,\n end,\n stride,\n offset,\n isClosedRing,\n dest,\n destinationStride,\n) {\n dest = dest ?? [];\n destinationStride = destinationStride ?? stride;\n\n const secondPointX = flatCoordinates[start + stride];\n const secondPointY = flatCoordinates[start + stride + 1];\n const secondToLastPointX = flatCoordinates[end - 2 * stride];\n const secondToLastPointY = flatCoordinates[end - 2 * stride + 1];\n let x, y, prevX, prevY, nextX, nextY, offsetX, offsetY;\n\n let i = 0;\n for (let j = start; j < end; j += stride) {\n // 1. Detect previous and next coordinates of a current vertex\n prevX = x;\n prevY = y;\n nextX = undefined;\n nextY = undefined;\n if (j + stride < end) {\n nextX = flatCoordinates[j + stride];\n nextY = flatCoordinates[j + stride + 1];\n }\n // First coordinate of a closed ring -> previous coordinate is the second to last one\n if (isClosedRing && j === start) {\n prevX = secondToLastPointX;\n prevY = secondToLastPointY;\n }\n // Last coordinate of a closed ring -> next coordinate is the second vertex of a line string (the last one is same as the first one for a closed ring)\n if (isClosedRing && j === end - stride) {\n nextX = secondPointX;\n nextY = secondPointY;\n }\n\n // 2. Current vertex to offset\n x = flatCoordinates[j];\n y = flatCoordinates[j + 1];\n\n // 3. Offset the vertex\n [offsetX, offsetY] = offsetLineVertex(\n x,\n y,\n prevX,\n prevY,\n nextX,\n nextY,\n offset,\n );\n dest[i++] = offsetX;\n dest[i++] = offsetY;\n\n // 4. Copy over other dimension values if any\n for (let k = 2; k < destinationStride; k++) {\n dest[i++] = flatCoordinates[j + k];\n }\n }\n\n if (dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n/**\n * Computes the offset of a single vertex of a line string.\n *\n * The function calculates a new vertex coordinate offset along the normal/miter direction of the line at this vertex.\n * Offset is applied along the segment normal (positive offset goes \"right\" relative to the line direction).\n * It handles first and last vertices (caps) as well as joins between two segments (mitering).\n * For very sharp angles, the function falls back to offsetting along the segment normal direction to avoid excessively long miters.\n *\n * Coordinates and the offset should be in the same units — either pixels or the same spatial reference system as the input line coordinates.\n *\n * @param {number} x Vertex x-coordinate.\n * @param {number} y Vertex y-coordinate.\n * @param {number|undefined} prevX Previous vertex x-coordinate.\n * Pass undefined if computing the offset for the first vertex (no previous vertex).\n * @param {number|undefined} prevY Previous vertex y-coordinate.\n * Pass undefined if computing the offset for the first vertex (no previous vertex).\n * @param {number|undefined} nextX Next vertex x-coordinate.\n * Pass undefined if computing the offset for the last vertex (no next vertex).\n * @param {number|undefined} nextY Next vertex y-coordinate.\n * Pass undefined if computing the offset for the last vertex (no next vertex).\n * @param {number} offset Offset distance along the segment normal direction.\n * Positive values offset to the right relative to the direction from previous to next vertex.\n * Negative values offset to the left.\n * @return {import(\"../../coordinate.js\").Coordinate} Offset vertex coordinate as `[x, y]`.\n */\nfunction offsetLineVertex(x, y, prevX, prevY, nextX, nextY, offset) {\n // Compute segment direction\n let nx, ny;\n if (prevX !== undefined && prevY !== undefined) {\n nx = x - prevX;\n ny = y - prevY;\n } else if (nextX !== undefined && nextY !== undefined) {\n nx = nextX - x;\n ny = nextY - y;\n } else {\n // no next, no previous point given -> just assume some default (horizontal) direction\n nx = 1;\n ny = 0;\n }\n\n // Normalize -> tangent\n const len = Math.hypot(nx, ny);\n const tx = nx / len;\n const ty = ny / len;\n\n // Rotate tangent 90° -> normal\n nx = -ty;\n ny = tx;\n\n // First / last vertex -> offset the point in the direction of the normal vector\n if (prevX === undefined || prevY === undefined) {\n return [x + nx * offset, y + ny * offset];\n }\n if (nextX === undefined || nextY === undefined) {\n return [x + nx * offset, y + ny * offset];\n }\n\n // Compute join angle - angle between 2 segments of the vertex.\n const joinAngle = angleBetween([x, y], [prevX, prevY], [nextX, nextY]);\n\n // Avoid huge or infinite miter joins for very sharp angles, offset in the segment direction in this case.\n if (Math.cos(joinAngle) > 0.998) {\n return [x + tx * offset, y + ty * offset];\n }\n\n // Compute join offset direction.\n // We rotate the normal vector by half of the join angle.\n // This gives the direction of the miter at the vertex.\n const cos = Math.cos(joinAngle / 2);\n const sin = Math.sin(joinAngle / 2);\n\n // Rotate the normal vector (nx, ny) by half of the join angle.\n // bx/by = bisector direction before normalization\n const bx = sin * nx + cos * ny;\n const by = -cos * nx + sin * ny;\n\n // Scale the bisector so that moving along it preserves the correct offset distance.\n // Dividing by sin(half of angle) converts the bisector into the true miter vector.\n // (This expands the miter for sharp angles and shortens it for wide ones.)\n const dx = bx * (1 / sin);\n const dy = by * (1 / sin);\n\n // Offset final vertex along miter direction\n return [x + dx * offset, y + dy * offset];\n}\n\n/**\n * Removes self-intersection loops (cycles) from an offset line.\n * When a polyline is offset, sharp turns can create self-intersecting loops.\n * This function detects those crossings and splices out the looped portions,\n * replacing them with the intersection point.\n *\n * @param {Array} coords Flat offset coordinates (modified in-place).\n * @param {number} stride Coordinate stride (typically 2).\n * @return {Array} The cleaned coordinate array.\n */\nexport function removeOffsetCycles(coords, stride) {\n for (let i = 0, ii = coords.length - 2; i < ii; i += stride) {\n for (let j = coords.length - 2 * stride; j > i + stride; j -= stride) {\n const p1x = coords[i];\n const p1y = coords[i + 1];\n const p2x = coords[i + stride];\n const p2y = coords[i + stride + 1];\n const p3x = coords[j];\n const p3y = coords[j + 1];\n const p4x = coords[j + stride];\n const p4y = coords[j + stride + 1];\n const d = (p4y - p3y) * (p2x - p1x) - (p4x - p3x) * (p2y - p1y);\n if (d === 0) {\n continue;\n }\n const t = ((p4x - p3x) * (p1y - p3y) - (p4y - p3y) * (p1x - p3x)) / d;\n const u = ((p2x - p1x) * (p1y - p3y) - (p2y - p1y) * (p1x - p3x)) / d;\n if (t > 0 && t < 1 && u > 0 && u < 1) {\n const ix = p1x + t * (p2x - p1x);\n const iy = p1y + t * (p2y - p1y);\n coords[i + stride] = ix;\n coords[i + stride + 1] = iy;\n coords.splice(i + 2 * stride, j - i - stride);\n break;\n }\n }\n }\n return coords;\n}\n","/**\n * @module ol/render/VectorContext\n */\n\n/**\n * @classdesc\n * Context for drawing geometries. A vector context is available on render\n * events and does not need to be constructed directly.\n * @api\n */\nclass VectorContext {\n /**\n * Render a geometry with a custom renderer.\n *\n * @param {import(\"../geom/SimpleGeometry.js\").default} geometry Geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {Function} renderer Renderer.\n * @param {Function} hitDetectionRenderer Renderer.\n * @param {number} [index] Render order index.\n */\n drawCustom(geometry, feature, renderer, hitDetectionRenderer, index) {}\n\n /**\n * Render a geometry.\n *\n * @param {import(\"../geom/Geometry.js\").default} geometry The geometry to render.\n */\n drawGeometry(geometry) {}\n\n /**\n * Set the rendering style.\n *\n * @param {import(\"../style/Style.js\").default} style The rendering style.\n */\n setStyle(style) {}\n\n /**\n * @param {import(\"../geom/Circle.js\").default} circleGeometry Circle geometry.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawCircle(circleGeometry, feature, index) {}\n\n /**\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} [index] Render order index.\n */\n drawFeature(feature, style, index) {}\n\n /**\n * @param {import(\"../geom/GeometryCollection.js\").default} geometryCollectionGeometry Geometry collection.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawGeometryCollection(geometryCollectionGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/LineString.js\").default|import(\"./Feature.js\").default} lineStringGeometry Line string geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawLineString(lineStringGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/MultiLineString.js\").default|import(\"./Feature.js\").default} multiLineStringGeometry MultiLineString geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawMultiLineString(multiLineStringGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/MultiPoint.js\").default|import(\"./Feature.js\").default} multiPointGeometry MultiPoint geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawMultiPoint(multiPointGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/MultiPolygon.js\").default} multiPolygonGeometry MultiPolygon geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawMultiPolygon(multiPolygonGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/Point.js\").default|import(\"./Feature.js\").default} pointGeometry Point geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawPoint(pointGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/Polygon.js\").default|import(\"./Feature.js\").default} polygonGeometry Polygon geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawPolygon(polygonGeometry, feature, index) {}\n\n /**\n * @param {import(\"../geom/SimpleGeometry.js\").default|import(\"./Feature.js\").default} geometry Geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\n drawText(geometry, feature, index) {}\n\n /**\n * @param {import(\"../style/Fill.js\").default} fillStyle Fill style.\n * @param {import(\"../style/Stroke.js\").default} strokeStyle Stroke style.\n */\n setFillStrokeStyle(fillStyle, strokeStyle) {}\n\n /**\n * @param {import(\"../style/Image.js\").default} imageStyle Image style.\n * @param {import(\"../render/canvas.js\").DeclutterImageWithText} [declutterImageWithText] Shared data for combined decluttering with a text style.\n */\n setImageStyle(imageStyle, declutterImageWithText) {}\n\n /**\n * @param {import(\"../style/Text.js\").default} textStyle Text style.\n * @param {import(\"../render/canvas.js\").DeclutterImageWithText} [declutterImageWithText] Shared data for combined decluttering with an image style.\n */\n setTextStyle(textStyle, declutterImageWithText) {}\n}\n\nexport default VectorContext;\n","/**\n * @module ol/css\n */\n\n/**\n * @typedef {Object} FontParameters\n * @property {string} style Style.\n * @property {string} variant Variant.\n * @property {string} weight Weight.\n * @property {string} size Size.\n * @property {string} lineHeight LineHeight.\n * @property {string} family Family.\n * @property {Array} families Families.\n */\n\n/**\n * The CSS class for hidden feature.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_HIDDEN = 'ol-hidden';\n\n/**\n * The CSS class that we'll give the DOM elements to have them selectable.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_SELECTABLE = 'ol-selectable';\n\n/**\n * The CSS class that we'll give the DOM elements to have them unselectable.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_UNSELECTABLE = 'ol-unselectable';\n\n/**\n * The CSS class for unsupported feature.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_UNSUPPORTED = 'ol-unsupported';\n\n/**\n * The CSS class for controls.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_CONTROL = 'ol-control';\n\n/**\n * The CSS class that we'll give the DOM elements that are collapsed, i.e.\n * to those elements which usually can be expanded.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_COLLAPSED = 'ol-collapsed';\n\n/**\n * From https://stackoverflow.com/questions/10135697/regex-to-parse-any-css-font\n * @type {RegExp}\n */\nconst fontRegEx = new RegExp(\n [\n '^\\\\s*(?=(?:(?:[-a-z]+\\\\s*){0,2}(italic|oblique))?)',\n '(?=(?:(?:[-a-z]+\\\\s*){0,2}(small-caps))?)',\n '(?=(?:(?:[-a-z]+\\\\s*){0,2}(bold(?:er)?|lighter|[1-9]00 ))?)',\n '(?:(?:normal|\\\\1|\\\\2|\\\\3)\\\\s*){0,3}((?:xx?-)?',\n '(?:small|large)|medium|smaller|larger|[\\\\.\\\\d]+(?:\\\\%|in|[cem]m|ex|p[ctx]))',\n '(?:\\\\s*\\\\/\\\\s*(normal|[\\\\.\\\\d]+(?:\\\\%|in|[cem]m|ex|p[ctx])?))',\n '?\\\\s*([-,\\\\\"\\\\\\'\\\\sa-z0-9]+?)\\\\s*$',\n ].join(''),\n 'i',\n);\n/** @type {Array<'style'|'variant'|'weight'|'size'|'lineHeight'|'family'>} */\nconst fontRegExMatchIndex = [\n 'style',\n 'variant',\n 'weight',\n 'size',\n 'lineHeight',\n 'family',\n];\n\n/** @type {Object} */\nexport const fontWeights = {\n normal: 400,\n bold: 700,\n};\n\n/**\n * Get the list of font families from a font spec. Note that this doesn't work\n * for font families that have commas in them.\n * @param {string} fontSpec The CSS font property.\n * @return {FontParameters|null} The font parameters (or null if the input spec is invalid).\n */\nexport const getFontParameters = function (fontSpec) {\n const match = fontSpec.match(fontRegEx);\n if (!match) {\n return null;\n }\n const style = /** @type {FontParameters} */ ({\n lineHeight: 'normal',\n size: '1.2em',\n style: 'normal',\n weight: '400',\n variant: 'normal',\n });\n for (let i = 0, ii = fontRegExMatchIndex.length; i < ii; ++i) {\n const value = match[i + 1];\n if (value !== undefined) {\n style[fontRegExMatchIndex[i]] =\n typeof value === 'string' ? value.trim() : value;\n }\n }\n if (isNaN(Number(style.weight)) && style.weight in fontWeights) {\n style.weight = fontWeights[style.weight];\n }\n style.families = style.family\n .split(/,\\s?/)\n .map((f) => f.trim().replace(/^['\"]|['\"]$/g, ''));\n return style;\n};\n","/**\n * @module ol/render/canvas\n */\nimport BaseObject from '../Object.js';\nimport {fontWeights, getFontParameters} from '../css.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {WORKER_OFFSCREEN_CANVAS} from '../has.js';\nimport {clear} from '../obj.js';\n\n/**\n * @typedef {'Circle' | 'Image' | 'LineString' | 'Polygon' | 'Text' | 'Default'} BuilderType\n */\n\n/**\n * @typedef {Object} FillState\n * @property {import(\"../colorlike.js\").ColorLike} fillStyle FillStyle.\n */\n\n/**\n * @typedef Label\n * @property {number} width Width.\n * @property {number} height Height.\n * @property {Array} contextInstructions ContextInstructions.\n */\n\n/**\n * @typedef {Object} FillStrokeState\n * @property {import(\"../colorlike.js\").ColorLike} [currentFillStyle] Current FillStyle.\n * @property {import(\"../colorlike.js\").ColorLike} [currentStrokeStyle] Current StrokeStyle.\n * @property {CanvasLineCap} [currentLineCap] Current LineCap.\n * @property {Array} currentLineDash Current LineDash.\n * @property {number} [currentLineDashOffset] Current LineDashOffset.\n * @property {CanvasLineJoin} [currentLineJoin] Current LineJoin.\n * @property {number} [currentLineWidth] Current LineWidth.\n * @property {number} [currentMiterLimit] Current MiterLimit.\n * @property {number} [currentStrokeOffset] Current StrokeOffset.\n * @property {number} [lastStroke] Last stroke.\n * @property {import(\"../colorlike.js\").ColorLike} [fillStyle] FillStyle.\n * @property {import(\"../colorlike.js\").ColorLike} [strokeStyle] StrokeStyle.\n * @property {CanvasLineCap} [lineCap] LineCap.\n * @property {Array} lineDash LineDash.\n * @property {number} [lineDashOffset] LineDashOffset.\n * @property {CanvasLineJoin} [lineJoin] LineJoin.\n * @property {number} [lineWidth] LineWidth.\n * @property {number} [miterLimit] MiterLimit.\n * @property {number} [strokeOffset] StrokeOffset.\n * @property {number} [fillPatternScale] Fill pattern scale.\n */\n\n/**\n * @typedef {Object} StrokeState\n * @property {CanvasLineCap} lineCap LineCap.\n * @property {Array} lineDash LineDash.\n * @property {number} lineDashOffset LineDashOffset.\n * @property {CanvasLineJoin} lineJoin LineJoin.\n * @property {number} lineWidth LineWidth.\n * @property {number} miterLimit MiterLimit.\n * @property {number} [strokeOffset] StrokeOffset.\n * @property {import(\"../colorlike.js\").ColorLike} strokeStyle StrokeStyle.\n */\n\n/**\n * @typedef {Object} TextState\n * @property {string} font Font.\n * @property {CanvasTextAlign} [textAlign] TextAlign.\n * @property {number} [repeat] Repeat.\n * @property {import(\"../style/Text.js\").TextJustify} [justify] Justify.\n * @property {CanvasTextBaseline} textBaseline TextBaseline.\n * @property {import(\"../style/Text.js\").TextPlacement} [placement] Placement.\n * @property {number} [maxAngle] MaxAngle.\n * @property {boolean} [overflow] Overflow.\n * @property {import(\"../style/Fill.js\").default} [backgroundFill] BackgroundFill.\n * @property {import(\"../style/Stroke.js\").default} [backgroundStroke] BackgroundStroke.\n * @property {import(\"../size.js\").Size} [scale] Scale.\n * @property {Array} [padding] Padding.\n */\n\n/**\n * @typedef {Object} SerializableInstructions\n * @property {Array<*>} instructions The rendering instructions.\n * @property {Array<*>} hitDetectionInstructions The rendering hit detection instructions.\n * @property {Array} coordinates The array of all coordinates.\n * @property {!Object} [textStates] The text states (decluttering).\n * @property {!Object} [fillStates] The fill states (decluttering).\n * @property {!Object} [strokeStates] The stroke states (decluttering).\n */\n\n/**\n * @typedef {Object} DeclutterImageWithText\n */\n\n/**\n * @const\n * @type {string}\n */\nexport const defaultFont = '10px sans-serif';\n\n/**\n * @const\n * @type {string}\n */\nexport const defaultFillStyle = '#000';\n\n/**\n * @const\n * @type {CanvasLineCap}\n */\nexport const defaultLineCap = 'round';\n\n/**\n * @const\n * @type {Array}\n */\nexport const defaultLineDash = [];\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultLineDashOffset = 0;\n\n/**\n * @const\n * @type {CanvasLineJoin}\n */\nexport const defaultLineJoin = 'round';\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultMiterLimit = 10;\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultStrokeOffset = 0;\n\n/**\n * @const\n * @type {import(\"../colorlike.js\").ColorLike}\n */\nexport const defaultStrokeStyle = '#000';\n\n/**\n * @const\n * @type {CanvasTextAlign}\n */\nexport const defaultTextAlign = 'center';\n\n/**\n * @const\n * @type {CanvasTextBaseline}\n */\nexport const defaultTextBaseline = 'middle';\n\n/**\n * @const\n * @type {Array}\n */\nexport const defaultPadding = [0, 0, 0, 0];\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultLineWidth = 1;\n\n/**\n * @type {BaseObject}\n */\nexport const checkedFonts = new BaseObject();\n\n/**\n * @type {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D}\n */\nlet measureContext = null;\n\n/**\n * @type {string}\n */\nlet measureFont;\n\n/**\n * @type {!Object}\n */\nexport const textHeights = {};\n\nconst genericFontFamilies = new Set([\n 'serif',\n 'sans-serif',\n 'monospace',\n 'cursive',\n 'fantasy',\n 'system-ui',\n 'ui-serif',\n 'ui-sans-serif',\n 'ui-monospace',\n 'ui-rounded',\n 'emoji',\n 'math',\n 'fangsong',\n]);\n\n/**\n * @param {string} style Css font-style\n * @param {string} weight Css font-weight\n * @param {string} family Css font-family\n * @return {string} Font key.\n */\nfunction getFontKey(style, weight, family) {\n return `${style} ${weight} 16px \"${family}\"`;\n}\n\n/**\n * Clears the label cache when a font becomes available.\n * @param {string} fontSpec CSS font spec.\n */\nexport const registerFont = (function () {\n const retries = 100;\n let timeout, fontFaceSet;\n\n /**\n * @param {string} fontSpec Css font spec\n * @return {Promise} Font with style and weight is available\n */\n async function isAvailable(fontSpec) {\n await fontFaceSet.ready;\n const fontFaces = await fontFaceSet.load(fontSpec);\n if (fontFaces.length === 0) {\n return false;\n }\n const font = getFontParameters(fontSpec);\n const checkFamily = font.families[0].toLowerCase();\n const checkWeight = font.weight;\n return fontFaces.some(\n /**\n * @param {import('../css.js').FontParameters} f Font.\n * @return {boolean} Font matches.\n */\n (f) => {\n const family = f.family.replace(/^['\"]|['\"]$/g, '').toLowerCase();\n const weight = fontWeights[f.weight] || f.weight;\n return (\n family === checkFamily &&\n f.style === font.style &&\n weight == checkWeight\n );\n },\n );\n }\n\n async function check() {\n await fontFaceSet.ready;\n let done = true;\n const checkedFontsProperties = checkedFonts.getProperties();\n const fonts = Object.keys(checkedFontsProperties).filter(\n (key) => checkedFontsProperties[key] < retries,\n );\n for (let i = fonts.length - 1; i >= 0; --i) {\n const font = fonts[i];\n let currentRetries = checkedFontsProperties[font];\n if (currentRetries < retries) {\n if (await isAvailable(font)) {\n clear(textHeights);\n checkedFonts.set(font, retries);\n } else {\n currentRetries += 10;\n checkedFonts.set(font, currentRetries, true);\n if (currentRetries < retries) {\n done = false;\n }\n }\n }\n }\n timeout = undefined;\n if (!done) {\n timeout = setTimeout(check, 100);\n }\n }\n\n return async function (fontSpec) {\n if (!fontFaceSet) {\n fontFaceSet = WORKER_OFFSCREEN_CANVAS ? self.fonts : document.fonts;\n }\n const font = getFontParameters(fontSpec);\n if (!font) {\n return;\n }\n const families = font.families;\n let needCheck = false;\n for (const family of families) {\n if (genericFontFamilies.has(family)) {\n continue;\n }\n const key = getFontKey(font.style, font.weight, family);\n if (checkedFonts.get(key) !== undefined) {\n continue;\n }\n checkedFonts.set(key, 0, true);\n needCheck = true;\n }\n if (needCheck) {\n clearTimeout(timeout);\n timeout = setTimeout(check, 100);\n }\n };\n})();\n\n/**\n * @param {string} font Font to use for measuring.\n * @return {import(\"../size.js\").Size} Measurement.\n */\nexport const measureTextHeight = (function () {\n /**\n * @type {HTMLDivElement}\n */\n let measureElement;\n return function (fontSpec) {\n let height = textHeights[fontSpec];\n if (height == undefined) {\n if (WORKER_OFFSCREEN_CANVAS) {\n const font = getFontParameters(fontSpec);\n const metrics = measureText(fontSpec, 'Žg');\n const lineHeight = isNaN(Number(font.lineHeight))\n ? 1.2\n : Number(font.lineHeight);\n height =\n lineHeight *\n (metrics.actualBoundingBoxAscent + metrics.actualBoundingBoxDescent);\n } else {\n if (!measureElement) {\n measureElement = document.createElement('div');\n measureElement.innerHTML = 'M';\n measureElement.style.minHeight = '0';\n measureElement.style.maxHeight = 'none';\n measureElement.style.height = 'auto';\n measureElement.style.padding = '0';\n measureElement.style.border = 'none';\n measureElement.style.position = 'absolute';\n measureElement.style.display = 'block';\n measureElement.style.left = '-99999px';\n }\n measureElement.style.font = fontSpec;\n document.body.appendChild(measureElement);\n height = measureElement.offsetHeight;\n document.body.removeChild(measureElement);\n }\n textHeights[fontSpec] = height;\n }\n return height;\n };\n})();\n\n/**\n * @param {string} font Font.\n * @param {string} text Text.\n * @return {TextMetrics} Text metrics.\n */\nfunction measureText(font, text) {\n if (!measureContext) {\n measureContext = createCanvasContext2D(1, 1);\n }\n if (font != measureFont) {\n measureContext.font = font;\n measureFont = measureContext.font;\n }\n return measureContext.measureText(text);\n}\n\n/**\n * @param {string} font Font.\n * @param {string} text Text.\n * @return {number} Width.\n */\nexport function measureTextWidth(font, text) {\n return measureText(font, text).width;\n}\n\n/**\n * Measure text width using a cache.\n * @param {string} font The font.\n * @param {string} text The text to measure.\n * @param {Object} cache A lookup of cached widths by text.\n * @return {number} The text width.\n */\nexport function measureAndCacheTextWidth(font, text, cache) {\n if (text in cache) {\n return cache[text];\n }\n const width = text\n .split('\\n')\n .reduce((prev, curr) => Math.max(prev, measureTextWidth(font, curr)), 0);\n cache[text] = width;\n return width;\n}\n\n/**\n * @param {TextState} baseStyle Base style.\n * @param {Array} chunks Text chunks to measure.\n * @return {{width: number, height: number, widths: Array, heights: Array, lineWidths: Array}}} Text metrics.\n */\nexport function getTextDimensions(baseStyle, chunks) {\n const widths = [];\n const heights = [];\n const lineWidths = [];\n let width = 0;\n let lineWidth = 0;\n let height = 0;\n let lineHeight = 0;\n for (let i = 0, ii = chunks.length; i <= ii; i += 2) {\n const text = chunks[i];\n if (text === '\\n' || i === ii) {\n width = Math.max(width, lineWidth);\n lineWidths.push(lineWidth);\n lineWidth = 0;\n height += lineHeight;\n lineHeight = 0;\n continue;\n }\n const font = chunks[i + 1] || baseStyle.font;\n const currentWidth = measureTextWidth(font, text);\n widths.push(currentWidth);\n lineWidth += currentWidth;\n const currentHeight = measureTextHeight(font);\n heights.push(currentHeight);\n lineHeight = Math.max(lineHeight, currentHeight);\n }\n return {width, height, widths, heights, lineWidths};\n}\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} rotation Rotation.\n * @param {number} offsetX X offset.\n * @param {number} offsetY Y offset.\n */\nexport function rotateAtOffset(context, rotation, offsetX, offsetY) {\n if (rotation !== 0) {\n context.translate(offsetX, offsetY);\n context.rotate(rotation);\n context.translate(-offsetX, -offsetY);\n }\n}\n\n/**\n * @param {CanvasRenderingContext2D|import(\"../render/canvas/ZIndexContext.js\").ZIndexContextProxy} context Context.\n * @param {import(\"../transform.js\").Transform|null} transform Transform.\n * @param {number} opacity Opacity.\n * @param {Label|HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} labelOrImage Label.\n * @param {number} originX Origin X.\n * @param {number} originY Origin Y.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../size.js\").Size} scale Scale.\n */\nexport function drawImageOrLabel(\n context,\n transform,\n opacity,\n labelOrImage,\n originX,\n originY,\n w,\n h,\n x,\n y,\n scale,\n) {\n context.save();\n\n if (opacity !== 1) {\n if (context.globalAlpha === undefined) {\n context.globalAlpha = (context) => (context.globalAlpha *= opacity);\n } else {\n context.globalAlpha *= opacity;\n }\n }\n if (transform) {\n context.transform.apply(context, transform);\n }\n\n if (/** @type {*} */ (labelOrImage).contextInstructions) {\n // label\n context.translate(x, y);\n context.scale(scale[0], scale[1]);\n executeLabelInstructions(/** @type {Label} */ (labelOrImage), context);\n } else if (scale[0] < 0 || scale[1] < 0) {\n // flipped image\n context.translate(x, y);\n context.scale(scale[0], scale[1]);\n context.drawImage(\n /** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (\n labelOrImage\n ),\n originX,\n originY,\n w,\n h,\n 0,\n 0,\n w,\n h,\n );\n } else {\n // if image not flipped translate and scale can be avoided\n context.drawImage(\n /** @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} */ (\n labelOrImage\n ),\n originX,\n originY,\n w,\n h,\n x,\n y,\n w * scale[0],\n h * scale[1],\n );\n }\n\n context.restore();\n}\n\n/**\n * @param {Label} label Label.\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context Context.\n */\nfunction executeLabelInstructions(label, context) {\n const contextInstructions = label.contextInstructions;\n for (let i = 0, ii = contextInstructions.length; i < ii; i += 2) {\n if (Array.isArray(contextInstructions[i + 1])) {\n context[contextInstructions[i]].apply(\n context,\n contextInstructions[i + 1],\n );\n } else {\n context[contextInstructions[i]] = contextInstructions[i + 1];\n }\n }\n}\n","/**\n * @module ol/render/canvas/Immediate\n */\n// FIXME test, especially polygons with holes and multipolygons\n// FIXME need to handle large thick features (where pixel size matters)\n// FIXME add offset and end to ol/geom/flat/transform~transform2D?\n\nimport {equals} from '../../array.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {intersects} from '../../extent.js';\nimport {transformGeom2D} from '../../geom/SimpleGeometry.js';\nimport {\n offsetLineString,\n removeOffsetCycles,\n} from '../../geom/flat/lineoffset.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {toFixed} from '../../math.js';\nimport {\n compose as composeTransform,\n create as createTransform,\n} from '../../transform.js';\nimport VectorContext from '../VectorContext.js';\nimport {\n defaultFillStyle,\n defaultFont,\n defaultLineCap,\n defaultLineDash,\n defaultLineDashOffset,\n defaultLineJoin,\n defaultLineWidth,\n defaultMiterLimit,\n defaultStrokeStyle,\n defaultTextAlign,\n defaultTextBaseline,\n} from '../canvas.js';\n\n/**\n * @classdesc\n * A concrete subclass of {@link module:ol/render/VectorContext~VectorContext} that implements\n * direct rendering of features and geometries to an HTML5 Canvas context.\n * Instances of this class are created internally by the library and\n * provided to application code as vectorContext member of the\n * {@link module:ol/render/Event~RenderEvent} object associated with postcompose, precompose and\n * render events emitted by layers and maps.\n */\nclass CanvasImmediateRenderer extends VectorContext {\n /**\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context Context.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n * @param {number} viewRotation View rotation.\n * @param {number} [squaredTolerance] Optional squared tolerance for simplification.\n * @param {import(\"../../proj.js\").TransformFunction} [userTransform] Transform from user to view projection.\n */\n constructor(\n context,\n pixelRatio,\n extent,\n transform,\n viewRotation,\n squaredTolerance,\n userTransform,\n ) {\n super();\n\n /**\n * @private\n * @type {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D}\n */\n this.context_ = context;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @private\n * @type {import(\"../../extent.js\").Extent}\n */\n this.extent_ = extent;\n\n /**\n * @private\n * @type {import(\"../../transform.js\").Transform}\n */\n this.transform_ = transform;\n\n /**\n * @private\n * @type {number}\n */\n this.transformRotation_ = transform\n ? toFixed(Math.atan2(transform[1], transform[0]), 10)\n : 0;\n\n /**\n * @private\n * @type {number}\n */\n this.viewRotation_ = viewRotation;\n\n /**\n * @private\n * @type {number}\n */\n this.squaredTolerance_ = squaredTolerance;\n\n /**\n * @private\n * @type {import(\"../../proj.js\").TransformFunction}\n */\n this.userTransform_ = userTransform;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").FillState}\n */\n this.contextFillState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").StrokeState}\n */\n this.contextStrokeState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").TextState}\n */\n this.contextTextState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").FillState}\n */\n this.fillState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").StrokeState}\n */\n this.strokeState_ = null;\n\n /**\n * @private\n * @type {import('../../DataTile.js').ImageLike}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.imageAnchorX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageAnchorY_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageHeight_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOpacity_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOriginX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOriginY_ = 0;\n\n /**\n * @private\n * @type {boolean}\n */\n this.imageRotateWithView_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.imageRotation_ = 0;\n\n /**\n * @private\n * @type {import(\"../../size.js\").Size}\n */\n this.imageScale_ = [0, 0];\n\n /**\n * @private\n * @type {number}\n */\n this.imageWidth_ = 0;\n\n /**\n * @private\n * @type {string}\n */\n this.text_ = '';\n\n /**\n * @private\n * @type {number}\n */\n this.textOffsetX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.textOffsetY_ = 0;\n\n /**\n * @private\n * @type {boolean}\n */\n this.textRotateWithView_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.textRotation_ = 0;\n\n /**\n * @private\n * @type {import(\"../../size.js\").Size}\n */\n this.textScale_ = [0, 0];\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").FillState}\n */\n this.textFillState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").StrokeState}\n */\n this.textStrokeState_ = null;\n\n /**\n * @private\n * @type {?import(\"../canvas.js\").TextState}\n */\n this.textState_ = null;\n\n /**\n * @private\n * @type {Array}\n */\n this.pixelCoordinates_ = [];\n\n /**\n * @private\n * @type {import(\"../../transform.js\").Transform}\n */\n this.tmpLocalTransform_ = createTransform();\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @private\n */\n drawImages_(flatCoordinates, offset, end, stride) {\n if (!this.image_) {\n return;\n }\n const pixelCoordinates = transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n this.transform_,\n this.pixelCoordinates_,\n );\n const context = this.context_;\n const localTransform = this.tmpLocalTransform_;\n const alpha = context.globalAlpha;\n if (this.imageOpacity_ != 1) {\n context.globalAlpha = alpha * this.imageOpacity_;\n }\n let rotation = this.imageRotation_;\n if (this.transformRotation_ === 0) {\n rotation -= this.viewRotation_;\n }\n if (this.imageRotateWithView_) {\n rotation += this.viewRotation_;\n }\n for (let i = 0, ii = pixelCoordinates.length; i < ii; i += 2) {\n const x = pixelCoordinates[i] - this.imageAnchorX_;\n const y = pixelCoordinates[i + 1] - this.imageAnchorY_;\n if (\n rotation !== 0 ||\n this.imageScale_[0] != 1 ||\n this.imageScale_[1] != 1\n ) {\n const centerX = x + this.imageAnchorX_;\n const centerY = y + this.imageAnchorY_;\n composeTransform(\n localTransform,\n centerX,\n centerY,\n 1,\n 1,\n rotation,\n -centerX,\n -centerY,\n );\n context.save();\n context.transform.apply(context, localTransform);\n context.translate(centerX, centerY);\n context.scale(this.imageScale_[0], this.imageScale_[1]);\n context.drawImage(\n this.image_,\n this.imageOriginX_,\n this.imageOriginY_,\n this.imageWidth_,\n this.imageHeight_,\n -this.imageAnchorX_,\n -this.imageAnchorY_,\n this.imageWidth_,\n this.imageHeight_,\n );\n context.restore();\n } else {\n context.drawImage(\n this.image_,\n this.imageOriginX_,\n this.imageOriginY_,\n this.imageWidth_,\n this.imageHeight_,\n x,\n y,\n this.imageWidth_,\n this.imageHeight_,\n );\n }\n }\n if (this.imageOpacity_ != 1) {\n context.globalAlpha = alpha;\n }\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @private\n */\n drawText_(flatCoordinates, offset, end, stride) {\n if (!this.textState_ || this.text_ === '') {\n return;\n }\n if (this.textFillState_) {\n this.setContextFillState_(this.textFillState_);\n }\n if (this.textStrokeState_) {\n this.setContextStrokeState_(this.textStrokeState_);\n }\n this.setContextTextState_(this.textState_);\n const pixelCoordinates = transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n this.transform_,\n this.pixelCoordinates_,\n );\n const context = this.context_;\n let rotation = this.textRotation_;\n if (this.transformRotation_ === 0) {\n rotation -= this.viewRotation_;\n }\n if (this.textRotateWithView_) {\n rotation += this.viewRotation_;\n }\n for (; offset < end; offset += stride) {\n const x = pixelCoordinates[offset] + this.textOffsetX_;\n const y = pixelCoordinates[offset + 1] + this.textOffsetY_;\n if (\n rotation !== 0 ||\n this.textScale_[0] != 1 ||\n this.textScale_[1] != 1\n ) {\n context.save();\n context.translate(x - this.textOffsetX_, y - this.textOffsetY_);\n context.rotate(rotation);\n context.translate(this.textOffsetX_, this.textOffsetY_);\n context.scale(this.textScale_[0], this.textScale_[1]);\n if (this.textStrokeState_) {\n context.strokeText(this.text_, 0, 0);\n }\n if (this.textFillState_) {\n context.fillText(this.text_, 0, 0);\n }\n context.restore();\n } else {\n if (this.textStrokeState_) {\n context.strokeText(this.text_, x, y);\n }\n if (this.textFillState_) {\n context.fillText(this.text_, x, y);\n }\n }\n }\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {boolean} close Close.\n * @param {number} [strokeOffset] Stroke Offset.\n * @private\n * @return {number} end End.\n */\n moveToLineTo_(flatCoordinates, offset, end, stride, close, strokeOffset) {\n const context = this.context_;\n let pixelCoordinates = transform2D(\n flatCoordinates,\n offset,\n end,\n stride,\n this.transform_,\n this.pixelCoordinates_,\n );\n if (Math.abs(strokeOffset) > 0) {\n pixelCoordinates = offsetLineString(\n pixelCoordinates,\n 0,\n pixelCoordinates.length,\n 2,\n strokeOffset,\n close,\n pixelCoordinates,\n );\n removeOffsetCycles(pixelCoordinates, 2);\n }\n context.moveTo(pixelCoordinates[0], pixelCoordinates[1]);\n let length = pixelCoordinates.length;\n if (close) {\n length -= 2;\n }\n for (let i = 2; i < length; i += 2) {\n context.lineTo(pixelCoordinates[i], pixelCoordinates[i + 1]);\n }\n if (close) {\n context.closePath();\n }\n return end;\n }\n\n /**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {number} [strokeOffset] Stroke Offset.\n * @private\n * @return {number} End.\n */\n drawRings_(flatCoordinates, offset, ends, stride, strokeOffset) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n offset = this.moveToLineTo_(\n flatCoordinates,\n offset,\n ends[i],\n stride,\n true,\n strokeOffset,\n );\n }\n return offset;\n }\n\n /**\n * Render a circle geometry into the canvas. Rendering is immediate and uses\n * the current fill and stroke styles.\n *\n * @param {import(\"../../geom/Circle.js\").default} geometry Circle geometry.\n * @api\n * @override\n */\n drawCircle(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/Circle.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.fillState_ || this.strokeState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const pixelCoordinates = transformGeom2D(\n geometry,\n this.transform_,\n this.pixelCoordinates_,\n );\n const dx = pixelCoordinates[2] - pixelCoordinates[0];\n const dy = pixelCoordinates[3] - pixelCoordinates[1];\n const radius = Math.sqrt(dx * dx + dy * dy);\n const context = this.context_;\n context.beginPath();\n context.arc(\n pixelCoordinates[0],\n pixelCoordinates[1],\n radius,\n 0,\n 2 * Math.PI,\n );\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n this.drawText_(geometry.getCenter(), 0, 2, 2);\n }\n }\n\n /**\n * Set the rendering style. Note that since this is an immediate rendering API,\n * any `zIndex` on the provided style will be ignored.\n *\n * @param {import(\"../../style/Style.js\").default} style The rendering style.\n * @api\n * @override\n */\n setStyle(style) {\n this.setFillStrokeStyle(style.getFill(), style.getStroke());\n this.setImageStyle(style.getImage());\n this.setTextStyle(style.getText());\n }\n\n /**\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n */\n setTransform(transform) {\n this.transform_ = transform;\n }\n\n /**\n * Render a geometry into the canvas. Call\n * {@link module:ol/render/canvas/Immediate~CanvasImmediateRenderer#setStyle renderer.setStyle()} first to set the rendering style.\n *\n * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry The geometry to render.\n * @api\n * @override\n */\n drawGeometry(geometry) {\n const type = geometry.getType();\n switch (type) {\n case 'Point':\n this.drawPoint(\n /** @type {import(\"../../geom/Point.js\").default} */ (geometry),\n );\n break;\n case 'LineString':\n this.drawLineString(\n /** @type {import(\"../../geom/LineString.js\").default} */ (geometry),\n );\n break;\n case 'Polygon':\n this.drawPolygon(\n /** @type {import(\"../../geom/Polygon.js\").default} */ (geometry),\n );\n break;\n case 'MultiPoint':\n this.drawMultiPoint(\n /** @type {import(\"../../geom/MultiPoint.js\").default} */ (geometry),\n );\n break;\n case 'MultiLineString':\n this.drawMultiLineString(\n /** @type {import(\"../../geom/MultiLineString.js\").default} */ (\n geometry\n ),\n );\n break;\n case 'MultiPolygon':\n this.drawMultiPolygon(\n /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (\n geometry\n ),\n );\n break;\n case 'GeometryCollection':\n this.drawGeometryCollection(\n /** @type {import(\"../../geom/GeometryCollection.js\").default} */ (\n geometry\n ),\n );\n break;\n case 'Circle':\n this.drawCircle(\n /** @type {import(\"../../geom/Circle.js\").default} */ (geometry),\n );\n break;\n default:\n }\n }\n\n /**\n * Render a feature into the canvas. Note that any `zIndex` on the provided\n * style will be ignored - features are rendered immediately in the order that\n * this method is called. If you need `zIndex` support, you should be using an\n * {@link module:ol/layer/Vector~VectorLayer} instead.\n *\n * @param {import(\"../../Feature.js\").default} feature Feature.\n * @param {import(\"../../style/Style.js\").default} style Style.\n * @api\n * @override\n */\n drawFeature(feature, style) {\n const geometry = style.getGeometryFunction()(feature);\n if (!geometry) {\n return;\n }\n this.setStyle(style);\n this.drawGeometry(geometry);\n }\n\n /**\n * Render a GeometryCollection to the canvas. Rendering is immediate and\n * uses the current styles appropriate for each geometry in the collection.\n *\n * @param {import(\"../../geom/GeometryCollection.js\").default} geometry Geometry collection.\n * @override\n */\n drawGeometryCollection(geometry) {\n const geometries = geometry.getGeometriesArray();\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n this.drawGeometry(geometries[i]);\n }\n }\n\n /**\n * Render a Point geometry into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {import(\"../../geom/Point.js\").default|import(\"../Feature.js\").default} geometry Point geometry.\n * @override\n */\n drawPoint(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/Point.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n const flatCoordinates = geometry.getFlatCoordinates();\n const stride = geometry.getStride();\n if (this.image_) {\n this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n if (this.text_ !== '') {\n this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n }\n\n /**\n * Render a MultiPoint geometry into the canvas. Rendering is immediate and\n * uses the current style.\n *\n * @param {import(\"../../geom/MultiPoint.js\").default|import(\"../Feature.js\").default} geometry MultiPoint geometry.\n * @override\n */\n drawMultiPoint(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/MultiPoint.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n const flatCoordinates = geometry.getFlatCoordinates();\n const stride = geometry.getStride();\n if (this.image_) {\n this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n if (this.text_ !== '') {\n this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n }\n\n /**\n * Render a LineString into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {import(\"../../geom/LineString.js\").default|import(\"../Feature.js\").default} geometry LineString geometry.\n * @override\n */\n drawLineString(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/LineString.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n const context = this.context_;\n const flatCoordinates = geometry.getFlatCoordinates();\n context.beginPath();\n this.moveToLineTo_(\n flatCoordinates,\n 0,\n flatCoordinates.length,\n geometry.getStride(),\n false,\n this.strokeState_.strokeOffset,\n );\n context.stroke();\n }\n if (this.text_ !== '') {\n const flatMidpoint = geometry.getFlatMidpoint();\n this.drawText_(flatMidpoint, 0, 2, 2);\n }\n }\n\n /**\n * Render a MultiLineString geometry into the canvas. Rendering is immediate\n * and uses the current style.\n *\n * @param {import(\"../../geom/MultiLineString.js\").default|import(\"../Feature.js\").default} geometry MultiLineString geometry.\n * @override\n */\n drawMultiLineString(geometry) {\n if (this.squaredTolerance_) {\n geometry =\n /** @type {import(\"../../geom/MultiLineString.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n const geometryExtent = geometry.getExtent();\n if (!intersects(this.extent_, geometryExtent)) {\n return;\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n const context = this.context_;\n const flatCoordinates = geometry.getFlatCoordinates();\n let offset = 0;\n const ends = /** @type {Array} */ (geometry.getEnds());\n const stride = geometry.getStride();\n context.beginPath();\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n offset = this.moveToLineTo_(\n flatCoordinates,\n offset,\n ends[i],\n stride,\n false,\n this.strokeState_.strokeOffset,\n );\n }\n context.stroke();\n }\n if (this.text_ !== '') {\n const flatMidpoints = geometry.getFlatMidpoints();\n this.drawText_(flatMidpoints, 0, flatMidpoints.length, 2);\n }\n }\n\n /**\n * Render a Polygon geometry into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {import(\"../../geom/Polygon.js\").default|import(\"../Feature.js\").default} geometry Polygon geometry.\n * @override\n */\n drawPolygon(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/Polygon.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_ || this.fillState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const context = this.context_;\n context.beginPath();\n this.drawRings_(\n geometry.getOrientedFlatCoordinates(),\n 0,\n /** @type {Array} */ (geometry.getEnds()),\n geometry.getStride(),\n this.strokeState_?.strokeOffset,\n );\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n const flatInteriorPoint = geometry.getFlatInteriorPoint();\n this.drawText_(flatInteriorPoint, 0, 2, 2);\n }\n }\n\n /**\n * Render MultiPolygon geometry into the canvas. Rendering is immediate and\n * uses the current style.\n * @param {import(\"../../geom/MultiPolygon.js\").default} geometry MultiPolygon geometry.\n * @override\n */\n drawMultiPolygon(geometry) {\n if (this.squaredTolerance_) {\n geometry = /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (\n geometry.simplifyTransformed(\n this.squaredTolerance_,\n this.userTransform_,\n )\n );\n }\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_ || this.fillState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const context = this.context_;\n const flatCoordinates = geometry.getOrientedFlatCoordinates();\n let offset = 0;\n const endss = geometry.getEndss();\n const stride = geometry.getStride();\n context.beginPath();\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n offset = this.drawRings_(\n flatCoordinates,\n offset,\n ends,\n stride,\n this.strokeState_?.strokeOffset,\n );\n }\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n const flatInteriorPoints = geometry.getFlatInteriorPoints();\n this.drawText_(flatInteriorPoints, 0, flatInteriorPoints.length, 2);\n }\n }\n\n /**\n * @param {import(\"../canvas.js\").FillState} fillState Fill state.\n * @private\n */\n setContextFillState_(fillState) {\n const context = this.context_;\n const contextFillState = this.contextFillState_;\n if (!contextFillState) {\n context.fillStyle = fillState.fillStyle;\n this.contextFillState_ = {\n fillStyle: fillState.fillStyle,\n };\n } else {\n if (contextFillState.fillStyle != fillState.fillStyle) {\n contextFillState.fillStyle = fillState.fillStyle;\n context.fillStyle = fillState.fillStyle;\n }\n }\n }\n\n /**\n * @param {import(\"../canvas.js\").StrokeState} strokeState Stroke state.\n * @private\n */\n setContextStrokeState_(strokeState) {\n const context = this.context_;\n const contextStrokeState = this.contextStrokeState_;\n if (!contextStrokeState) {\n context.lineCap = strokeState.lineCap;\n context.setLineDash(strokeState.lineDash);\n context.lineDashOffset = strokeState.lineDashOffset;\n context.lineJoin = strokeState.lineJoin;\n context.lineWidth = strokeState.lineWidth;\n context.miterLimit = strokeState.miterLimit;\n context.strokeStyle = strokeState.strokeStyle;\n this.contextStrokeState_ = {\n lineCap: strokeState.lineCap,\n lineDash: strokeState.lineDash,\n lineDashOffset: strokeState.lineDashOffset,\n lineJoin: strokeState.lineJoin,\n lineWidth: strokeState.lineWidth,\n miterLimit: strokeState.miterLimit,\n strokeStyle: strokeState.strokeStyle,\n };\n } else {\n if (contextStrokeState.lineCap != strokeState.lineCap) {\n contextStrokeState.lineCap = strokeState.lineCap;\n context.lineCap = strokeState.lineCap;\n }\n if (!equals(contextStrokeState.lineDash, strokeState.lineDash)) {\n context.setLineDash(\n (contextStrokeState.lineDash = strokeState.lineDash),\n );\n }\n if (contextStrokeState.lineDashOffset != strokeState.lineDashOffset) {\n contextStrokeState.lineDashOffset = strokeState.lineDashOffset;\n context.lineDashOffset = strokeState.lineDashOffset;\n }\n if (contextStrokeState.lineJoin != strokeState.lineJoin) {\n contextStrokeState.lineJoin = strokeState.lineJoin;\n context.lineJoin = strokeState.lineJoin;\n }\n if (contextStrokeState.lineWidth != strokeState.lineWidth) {\n contextStrokeState.lineWidth = strokeState.lineWidth;\n context.lineWidth = strokeState.lineWidth;\n }\n if (contextStrokeState.miterLimit != strokeState.miterLimit) {\n contextStrokeState.miterLimit = strokeState.miterLimit;\n context.miterLimit = strokeState.miterLimit;\n }\n if (contextStrokeState.strokeStyle != strokeState.strokeStyle) {\n contextStrokeState.strokeStyle = strokeState.strokeStyle;\n context.strokeStyle = strokeState.strokeStyle;\n }\n }\n }\n\n /**\n * @param {import(\"../canvas.js\").TextState} textState Text state.\n * @private\n */\n setContextTextState_(textState) {\n const context = this.context_;\n const contextTextState = this.contextTextState_;\n const textAlign = textState.textAlign\n ? textState.textAlign\n : defaultTextAlign;\n if (!contextTextState) {\n context.font = textState.font;\n context.textAlign = textAlign;\n context.textBaseline = textState.textBaseline;\n this.contextTextState_ = {\n font: textState.font,\n textAlign: textAlign,\n textBaseline: textState.textBaseline,\n };\n } else {\n if (contextTextState.font != textState.font) {\n contextTextState.font = textState.font;\n context.font = textState.font;\n }\n if (contextTextState.textAlign != textAlign) {\n contextTextState.textAlign = textAlign;\n context.textAlign = textAlign;\n }\n if (contextTextState.textBaseline != textState.textBaseline) {\n contextTextState.textBaseline = textState.textBaseline;\n context.textBaseline = textState.textBaseline;\n }\n }\n }\n\n /**\n * Set the fill and stroke style for subsequent draw operations. To clear\n * either fill or stroke styles, pass null for the appropriate parameter.\n *\n * @param {import(\"../../style/Fill.js\").default} fillStyle Fill style.\n * @param {import(\"../../style/Stroke.js\").default} strokeStyle Stroke style.\n * @override\n */\n setFillStrokeStyle(fillStyle, strokeStyle) {\n if (!fillStyle) {\n this.fillState_ = null;\n } else {\n const fillStyleColor = fillStyle.getColor();\n this.fillState_ = {\n fillStyle: asColorLike(\n fillStyleColor ? fillStyleColor : defaultFillStyle,\n ),\n };\n }\n if (!strokeStyle) {\n this.strokeState_ = null;\n } else {\n const strokeStyleColor = strokeStyle.getColor();\n const strokeStyleLineCap = strokeStyle.getLineCap();\n const strokeStyleLineDash = strokeStyle.getLineDash();\n const strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n const strokeStyleLineJoin = strokeStyle.getLineJoin();\n const strokeStyleWidth = strokeStyle.getWidth();\n const strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n const lineDash = strokeStyleLineDash\n ? strokeStyleLineDash\n : defaultLineDash;\n const strokeOffset = strokeStyle.getOffset();\n this.strokeState_ = {\n lineCap:\n strokeStyleLineCap !== undefined\n ? strokeStyleLineCap\n : defaultLineCap,\n lineDash:\n this.pixelRatio_ === 1\n ? lineDash\n : lineDash.map((n) => n * this.pixelRatio_),\n lineDashOffset:\n (strokeStyleLineDashOffset\n ? strokeStyleLineDashOffset\n : defaultLineDashOffset) * this.pixelRatio_,\n lineJoin:\n strokeStyleLineJoin !== undefined\n ? strokeStyleLineJoin\n : defaultLineJoin,\n lineWidth:\n (strokeStyleWidth !== undefined\n ? strokeStyleWidth\n : defaultLineWidth) * this.pixelRatio_,\n miterLimit:\n strokeStyleMiterLimit !== undefined\n ? strokeStyleMiterLimit\n : defaultMiterLimit,\n strokeStyle: asColorLike(\n strokeStyleColor ? strokeStyleColor : defaultStrokeStyle,\n ),\n strokeOffset: (strokeOffset ?? 0) * this.pixelRatio_,\n };\n }\n }\n\n /**\n * Set the image style for subsequent draw operations. Pass null to remove\n * the image style.\n *\n * @param {import(\"../../style/Image.js\").default} imageStyle Image style.\n * @override\n */\n setImageStyle(imageStyle) {\n let imageSize;\n if (!imageStyle || !(imageSize = imageStyle.getSize())) {\n this.image_ = null;\n return;\n }\n const imagePixelRatio = imageStyle.getPixelRatio(this.pixelRatio_);\n const imageAnchor = imageStyle.getAnchor();\n const imageOrigin = imageStyle.getOrigin();\n this.image_ = imageStyle.getImage(this.pixelRatio_);\n this.imageAnchorX_ = imageAnchor[0] * imagePixelRatio;\n this.imageAnchorY_ = imageAnchor[1] * imagePixelRatio;\n this.imageHeight_ = imageSize[1] * imagePixelRatio;\n this.imageOpacity_ = imageStyle.getOpacity();\n this.imageOriginX_ = imageOrigin[0];\n this.imageOriginY_ = imageOrigin[1];\n this.imageRotateWithView_ = imageStyle.getRotateWithView();\n this.imageRotation_ = imageStyle.getRotation();\n const imageScale = imageStyle.getScaleArray();\n this.imageScale_ = [\n (imageScale[0] * this.pixelRatio_) / imagePixelRatio,\n (imageScale[1] * this.pixelRatio_) / imagePixelRatio,\n ];\n this.imageWidth_ = imageSize[0] * imagePixelRatio;\n }\n\n /**\n * Set the text style for subsequent draw operations. Pass null to\n * remove the text style.\n *\n * @param {import(\"../../style/Text.js\").default} textStyle Text style.\n * @override\n */\n setTextStyle(textStyle) {\n if (!textStyle) {\n this.text_ = '';\n } else {\n const textFillStyle = textStyle.getFill();\n if (!textFillStyle) {\n this.textFillState_ = null;\n } else {\n const textFillStyleColor = textFillStyle.getColor();\n this.textFillState_ = {\n fillStyle: asColorLike(\n textFillStyleColor ? textFillStyleColor : defaultFillStyle,\n ),\n };\n }\n const textStrokeStyle = textStyle.getStroke();\n if (!textStrokeStyle) {\n this.textStrokeState_ = null;\n } else {\n const textStrokeStyleColor = textStrokeStyle.getColor();\n const textStrokeStyleLineCap = textStrokeStyle.getLineCap();\n const textStrokeStyleLineDash = textStrokeStyle.getLineDash();\n const textStrokeStyleLineDashOffset =\n textStrokeStyle.getLineDashOffset();\n const textStrokeStyleLineJoin = textStrokeStyle.getLineJoin();\n const textStrokeStyleWidth = textStrokeStyle.getWidth();\n const textStrokeStyleMiterLimit = textStrokeStyle.getMiterLimit();\n this.textStrokeState_ = {\n lineCap:\n textStrokeStyleLineCap !== undefined\n ? textStrokeStyleLineCap\n : defaultLineCap,\n lineDash: textStrokeStyleLineDash\n ? textStrokeStyleLineDash\n : defaultLineDash,\n lineDashOffset: textStrokeStyleLineDashOffset\n ? textStrokeStyleLineDashOffset\n : defaultLineDashOffset,\n lineJoin:\n textStrokeStyleLineJoin !== undefined\n ? textStrokeStyleLineJoin\n : defaultLineJoin,\n lineWidth:\n textStrokeStyleWidth !== undefined\n ? textStrokeStyleWidth\n : defaultLineWidth,\n miterLimit:\n textStrokeStyleMiterLimit !== undefined\n ? textStrokeStyleMiterLimit\n : defaultMiterLimit,\n strokeStyle: asColorLike(\n textStrokeStyleColor ? textStrokeStyleColor : defaultStrokeStyle,\n ),\n };\n }\n const textFont = textStyle.getFont();\n const textOffsetX = textStyle.getOffsetX();\n const textOffsetY = textStyle.getOffsetY();\n const textRotateWithView = textStyle.getRotateWithView();\n const textRotation = textStyle.getRotation();\n const textScale = textStyle.getScaleArray();\n const textText = textStyle.getText();\n const textTextAlign = textStyle.getTextAlign();\n const textTextBaseline = textStyle.getTextBaseline();\n this.textState_ = {\n font: textFont !== undefined ? textFont : defaultFont,\n textAlign:\n textTextAlign !== undefined ? textTextAlign : defaultTextAlign,\n textBaseline:\n textTextBaseline !== undefined\n ? textTextBaseline\n : defaultTextBaseline,\n };\n this.text_ =\n textText !== undefined\n ? Array.isArray(textText)\n ? textText.reduce((acc, t, i) => (acc += i % 2 ? ' ' : t), '')\n : textText\n : '';\n this.textOffsetX_ =\n textOffsetX !== undefined ? this.pixelRatio_ * textOffsetX : 0;\n this.textOffsetY_ =\n textOffsetY !== undefined ? this.pixelRatio_ * textOffsetY : 0;\n this.textRotateWithView_ =\n textRotateWithView !== undefined ? textRotateWithView : false;\n this.textRotation_ = textRotation !== undefined ? textRotation : 0;\n this.textScale_ = [\n this.pixelRatio_ * textScale[0],\n this.pixelRatio_ * textScale[1],\n ];\n }\n }\n}\n\nexport default CanvasImmediateRenderer;\n","/**\n * @module ol/renderer/vector\n */\nimport ImageState from '../ImageState.js';\nimport {getUid} from '../util.js';\n\n/**\n * Feature callback. The callback will be called with three arguments. The first\n * argument is one {@link module:ol/Feature~Feature feature} or {@link module:ol/render/Feature~RenderFeature render feature}\n * at the pixel, the second is the {@link module:ol/layer/Layer~Layer layer} of the feature and will be null for\n * unmanaged layers. The third is the {@link module:ol/geom/SimpleGeometry~SimpleGeometry} of the feature. For features\n * with a GeometryCollection geometry, it will be the first detected geometry from the collection.\n * @template T\n * @typedef {function(import(\"../Feature.js\").FeatureLike, import(\"../layer/Layer.js\").default, import(\"../geom/SimpleGeometry.js\").default): T} FeatureCallback\n */\n\n/**\n * Tolerance for geometry simplification in device pixels.\n * @type {number}\n */\nconst SIMPLIFY_TOLERANCE = 0.5;\n\n/**\n * @const\n * @type {Object}\n */\nconst GEOMETRY_RENDERERS = {\n 'Point': renderPointGeometry,\n 'LineString': renderLineStringGeometry,\n 'Polygon': renderPolygonGeometry,\n 'MultiPoint': renderMultiPointGeometry,\n 'MultiLineString': renderMultiLineStringGeometry,\n 'MultiPolygon': renderMultiPolygonGeometry,\n 'GeometryCollection': renderGeometryCollectionGeometry,\n 'Circle': renderCircleGeometry,\n};\n\n/**\n * @param {import(\"../Feature.js\").FeatureLike} feature1 Feature 1.\n * @param {import(\"../Feature.js\").FeatureLike} feature2 Feature 2.\n * @return {number} Order.\n */\nexport function defaultOrder(feature1, feature2) {\n return parseInt(getUid(feature1), 10) - parseInt(getUid(feature2), 10);\n}\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Squared pixel tolerance.\n */\nexport function getSquaredTolerance(resolution, pixelRatio) {\n const tolerance = getTolerance(resolution, pixelRatio);\n return tolerance * tolerance;\n}\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel tolerance.\n */\nexport function getTolerance(resolution, pixelRatio) {\n return (SIMPLIFY_TOLERANCE * resolution) / pixelRatio;\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Builder group.\n * @param {import(\"../geom/Circle.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderCircleGeometry(builderGroup, geometry, style, feature, index) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (fillStyle || strokeStyle) {\n const circleReplay = builderGroup.getBuilder(style.getZIndex(), 'Circle');\n circleReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n circleReplay.drawCircle(geometry, feature, index);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Transform from user to view projection.\n * @param {boolean} [declutter] Enable decluttering.\n * @param {number} [index] Render order index..\n * @return {boolean} `true` if style is loading.\n */\nexport function renderFeature(\n replayGroup,\n feature,\n style,\n squaredTolerance,\n listener,\n transform,\n declutter,\n index,\n) {\n const loadingPromises = [];\n const imageStyle = style.getImage();\n if (imageStyle) {\n let loading = true;\n const imageState = imageStyle.getImageState();\n if (imageState == ImageState.LOADED || imageState == ImageState.ERROR) {\n loading = false;\n } else {\n if (imageState == ImageState.IDLE) {\n imageStyle.load();\n }\n }\n if (loading) {\n loadingPromises.push(imageStyle.ready());\n }\n }\n const fillStyle = style.getFill();\n if (fillStyle && fillStyle.loading()) {\n loadingPromises.push(fillStyle.ready());\n }\n const loading = loadingPromises.length > 0;\n if (loading) {\n Promise.all(loadingPromises).then(() => listener(null));\n }\n renderFeatureInternal(\n replayGroup,\n feature,\n style,\n squaredTolerance,\n transform,\n declutter,\n index,\n );\n\n return loading;\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @param {boolean} [declutter] Enable decluttering.\n * @param {number} [index] Render order index..\n */\nfunction renderFeatureInternal(\n replayGroup,\n feature,\n style,\n squaredTolerance,\n transform,\n declutter,\n index,\n) {\n const geometry = style.getGeometryFunction()(feature);\n if (!geometry) {\n return;\n }\n const simplifiedGeometry = geometry.simplifyTransformed(\n squaredTolerance,\n transform,\n );\n const renderer = style.getRenderer();\n if (renderer) {\n renderGeometry(replayGroup, simplifiedGeometry, style, feature, index);\n } else {\n const geometryRenderer = GEOMETRY_RENDERERS[simplifiedGeometry.getType()];\n geometryRenderer(\n replayGroup,\n simplifiedGeometry,\n style,\n feature,\n index,\n declutter,\n );\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderGeometry(replayGroup, geometry, style, feature, index) {\n if (geometry.getType() == 'GeometryCollection') {\n const geometries =\n /** @type {import(\"../geom/GeometryCollection.js\").default} */ (\n geometry\n ).getGeometries();\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n renderGeometry(replayGroup, geometries[i], style, feature, index);\n }\n return;\n }\n const replay = replayGroup.getBuilder(style.getZIndex(), 'Default');\n replay.drawCustom(\n /** @type {import(\"../geom/SimpleGeometry.js\").default} */ (geometry),\n feature,\n style.getRenderer(),\n style.getHitDetectionRenderer(),\n index,\n );\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/GeometryCollection.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} [declutterBuilderGroup] Builder for decluttering.\n * @param {number} [index] Render order index.\n */\nfunction renderGeometryCollectionGeometry(\n replayGroup,\n geometry,\n style,\n feature,\n declutterBuilderGroup,\n index,\n) {\n const geometries = geometry.getGeometriesArray();\n let i, ii;\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n const geometryRenderer = GEOMETRY_RENDERERS[geometries[i].getType()];\n geometryRenderer(\n replayGroup,\n geometries[i],\n style,\n feature,\n declutterBuilderGroup,\n index,\n );\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/LineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderLineStringGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n index,\n) {\n const strokeStyle = style.getStroke();\n if (strokeStyle) {\n const lineStringReplay = builderGroup.getBuilder(\n style.getZIndex(),\n 'LineString',\n );\n lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n lineStringReplay.drawLineString(geometry, feature, index);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiLineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderMultiLineStringGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n index,\n) {\n const strokeStyle = style.getStroke();\n if (strokeStyle) {\n const lineStringReplay = builderGroup.getBuilder(\n style.getZIndex(),\n 'LineString',\n );\n lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n lineStringReplay.drawMultiLineString(geometry, feature, index);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiPolygon.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderMultiPolygonGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n index,\n) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (strokeStyle || fillStyle) {\n const polygonReplay = builderGroup.getBuilder(style.getZIndex(), 'Polygon');\n polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n polygonReplay.drawMultiPolygon(geometry, feature, index);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/Point.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n * @param {boolean} [declutter] Enable decluttering.\n */\nfunction renderPointGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n index,\n declutter,\n) {\n const imageStyle = style.getImage();\n const textStyle = style.getText();\n const hasText = textStyle && textStyle.getText();\n /** @type {import(\"../render/canvas.js\").DeclutterImageWithText} */\n const declutterImageWithText =\n declutter && imageStyle && hasText ? {} : undefined;\n if (imageStyle) {\n if (imageStyle.getImageState() != ImageState.LOADED) {\n return;\n }\n const imageReplay = builderGroup.getBuilder(style.getZIndex(), 'Image');\n imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n imageReplay.drawPoint(geometry, feature, index);\n }\n if (hasText) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle, declutterImageWithText);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/MultiPoint.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n * @param {boolean} [declutter] Enable decluttering.\n */\nfunction renderMultiPointGeometry(\n builderGroup,\n geometry,\n style,\n feature,\n index,\n declutter,\n) {\n const imageStyle = style.getImage();\n const hasImage = imageStyle && imageStyle.getOpacity() !== 0;\n const textStyle = style.getText();\n const hasText = textStyle && textStyle.getText();\n /** @type {import(\"../render/canvas.js\").DeclutterImageWithText} */\n const declutterImageWithText =\n declutter && hasImage && hasText ? {} : undefined;\n if (hasImage) {\n if (imageStyle.getImageState() != ImageState.LOADED) {\n return;\n }\n const imageReplay = builderGroup.getBuilder(style.getZIndex(), 'Image');\n imageReplay.setImageStyle(imageStyle, declutterImageWithText);\n imageReplay.drawMultiPoint(geometry, feature, index);\n }\n if (hasText) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle, declutterImageWithText);\n textReplay.drawText(geometry, feature, index);\n }\n}\n\n/**\n * @param {import(\"../render/canvas/BuilderGroup.js\").default} builderGroup Replay group.\n * @param {import(\"../geom/Polygon.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} [index] Render order index.\n */\nfunction renderPolygonGeometry(builderGroup, geometry, style, feature, index) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (fillStyle || strokeStyle) {\n const polygonReplay = builderGroup.getBuilder(style.getZIndex(), 'Polygon');\n polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n polygonReplay.drawPolygon(geometry, feature, index);\n }\n const textStyle = style.getText();\n if (textStyle && textStyle.getText()) {\n const textReplay = builderGroup.getBuilder(style.getZIndex(), 'Text');\n textReplay.setTextStyle(textStyle);\n textReplay.drawText(geometry, feature, index);\n }\n}\n","/**\n * @module ol/render/EventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered before a layer is rendered.\n * @event module:ol/render/Event~RenderEvent#prerender\n * @api\n */\n PRERENDER: 'prerender',\n\n /**\n * Triggered after a layer is rendered.\n * @event module:ol/render/Event~RenderEvent#postrender\n * @api\n */\n POSTRENDER: 'postrender',\n\n /**\n * Triggered before layers are composed. When dispatched by the map, the event object will not have\n * a `context` set. When dispatched by a layer, the event object will have a `context` set. Only\n * WebGL layers currently dispatch this event.\n * @event module:ol/render/Event~RenderEvent#precompose\n * @api\n */\n PRECOMPOSE: 'precompose',\n\n /**\n * Triggered after layers are composed. When dispatched by the map, the event object will not have\n * a `context` set. When dispatched by a layer, the event object will have a `context` set. Only\n * WebGL layers currently dispatch this event.\n * @event module:ol/render/Event~RenderEvent#postcompose\n * @api\n */\n POSTCOMPOSE: 'postcompose',\n\n /**\n * Triggered when rendering is complete, i.e. all sources and tiles have\n * finished loading for the current viewport, and all tiles are faded in.\n * The event object will not have a `context` set.\n * @event module:ol/render/Event~RenderEvent#rendercomplete\n * @api\n */\n RENDERCOMPLETE: 'rendercomplete',\n};\n\n/**\n * @typedef {'postrender'|'precompose'|'postcompose'|'rendercomplete'} MapRenderEventTypes\n */\n\n/**\n * @typedef {'postrender'|'prerender'} LayerRenderEventTypes\n */\n","/**\n * @module ol/featureloader\n */\n\n/**\n *\n * @type {boolean}\n * @private\n */\nlet withCredentials = false;\n\n/**\n * {@link module:ol/source/Vector~VectorSource} sources use a function of this type to\n * load features.\n *\n * This function takes 3 arguments: an {@link module:ol/extent~Extent} representing\n * the area to be loaded, a `{number}` representing the resolution (map units per pixel), and a\n * {@link module:ol/proj/Projection~Projection} for the projection. The function is expeced to return\n * a promise that resolves to an array of features.\n *\n * There are also a deprecated signature, with `void` as\n * return, and two additional arguments: an optional success callback that should get\n * the loaded features passed as an argument and an optional failure callback with no arguments.\n *\n * The function is responsible for loading the features and adding them to the\n * source.\n *\n * @template {import(\"./Feature.js\").FeatureLike} [FeatureType=import(\"./Feature.js\").FeatureLike]\n * @typedef {(\n * extent: import(\"./extent.js\").Extent,\n * resolution: number,\n * projection: import(\"./proj/Projection.js\").default,\n * success?: (features: Array) => void,\n * failure?: () => void) => void|Promise>} FeatureLoader\n * @api\n */\n\n/**\n * {@link module:ol/source/Vector~VectorSource} sources use a function of this type to\n * get the url to load features from.\n *\n * This function takes an {@link module:ol/extent~Extent} representing the area\n * to be loaded, a `{number}` representing the resolution (map units per pixel)\n * and an {@link module:ol/proj/Projection~Projection} for the projection as\n * arguments and returns a `{string}` representing the URL.\n * @typedef {function(import(\"./extent.js\").Extent, number, import(\"./proj/Projection.js\").default): string} FeatureUrlFunction\n * @api\n */\n\n/**\n * @template {import(\"./Feature.js\").FeatureLike} [FeatureType=import(\"./Feature.js\").default]\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @param {function(Array, import(\"./proj/Projection.js\").default): void} success Success\n * Function called with the loaded features and optionally with the data projection.\n * @param {function(): void} failure Failure\n * Function called when loading failed.\n */\nexport function loadFeaturesXhr(\n url,\n format,\n extent,\n resolution,\n projection,\n success,\n failure,\n) {\n const xhr = new XMLHttpRequest();\n xhr.open(\n 'GET',\n typeof url === 'function' ? url(extent, resolution, projection) : url,\n true,\n );\n if (format.getType() == 'arraybuffer') {\n xhr.responseType = 'arraybuffer';\n }\n xhr.withCredentials = withCredentials;\n /**\n * @param {Event} event Event.\n * @private\n */\n xhr.onload = function (event) {\n // status will be 0 for file:// urls\n if (!xhr.status || (xhr.status >= 200 && xhr.status < 300)) {\n const type = format.getType();\n try {\n /** @type {Document|Node|Object|string|undefined} */\n let source;\n if (type == 'text' || type == 'json') {\n source = xhr.responseText;\n } else if (type == 'xml') {\n source = xhr.responseXML || xhr.responseText;\n } else if (type == 'arraybuffer') {\n source = /** @type {ArrayBuffer} */ (xhr.response);\n }\n if (source) {\n success(\n /** @type {Array} */\n (\n format.readFeatures(source, {\n extent: extent,\n featureProjection: projection,\n })\n ),\n format.readProjection(source),\n );\n } else {\n failure();\n }\n } catch {\n failure();\n }\n } else {\n failure();\n }\n };\n /**\n * @private\n */\n xhr.onerror = failure;\n xhr.send();\n}\n\n/**\n * Create an XHR feature loader for a `url` and `format`. The feature loader\n * loads features (with XHR), parses the features, and adds them to the\n * vector source.\n *\n * @template {import(\"./Feature.js\").FeatureLike} [FeatureType=import(\"./Feature.js\").default]\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @return {FeatureLoader} The feature loader.\n * @api\n */\nexport function xhr(url, format) {\n /**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @param {function(Array): void} [success] Success\n * Function called when loading succeeded.\n * @param {function(): void} [failure] Failure\n * Function called when loading failed.\n * @this {import(\"./source/Vector.js\").default}\n */\n return function (extent, resolution, projection, success, failure) {\n loadFeaturesXhr(\n url,\n format,\n extent,\n resolution,\n projection,\n /**\n * @param {Array} features The loaded features.\n * @param {import(\"./proj/Projection.js\").default} dataProjection Data\n * projection.\n */\n (features, dataProjection) => {\n this.addFeatures(features);\n if (success !== undefined) {\n success(features);\n }\n },\n () => {\n this.changed();\n if (failure !== undefined) {\n failure();\n }\n },\n );\n };\n}\n\n/**\n * Setter for the withCredentials configuration for the XHR.\n *\n * @param {boolean} xhrWithCredentials The value of withCredentials to set.\n * Compare https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/\n * @api\n */\nexport function setWithCredentials(xhrWithCredentials) {\n withCredentials = xhrWithCredentials;\n}\n","/**\n * @module ol/loadingstrategy\n */\n\nimport {fromUserExtent, fromUserResolution, toUserExtent} from './proj.js';\n\n/**\n * Strategy function for loading all features with a single request.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array} Extents.\n * @api\n */\nexport function all(extent, resolution) {\n return [[-Infinity, -Infinity, Infinity, Infinity]];\n}\n\n/**\n * Strategy function for loading features based on the view's extent and\n * resolution.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array} Extents.\n * @api\n */\nexport function bbox(extent, resolution) {\n return [extent];\n}\n\n/**\n * Creates a strategy function for loading features based on a tile grid.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {function(import(\"./extent.js\").Extent, number, import(\"./proj.js\").Projection): Array} Loading strategy.\n * @api\n */\nexport function tile(tileGrid) {\n return (\n /**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"./proj.js\").Projection} projection Projection.\n * @return {Array} Extents.\n */\n function (extent, resolution, projection) {\n const z = tileGrid.getZForResolution(\n fromUserResolution(resolution, projection),\n );\n const tileRange = tileGrid.getTileRangeForExtentAndZ(\n fromUserExtent(extent, projection),\n z,\n );\n /** @type {Array} */\n const extents = [];\n /** @type {import(\"./tilecoord.js\").TileCoord} */\n const tileCoord = [z, 0, 0];\n for (\n tileCoord[1] = tileRange.minX;\n tileCoord[1] <= tileRange.maxX;\n ++tileCoord[1]\n ) {\n for (\n tileCoord[2] = tileRange.minY;\n tileCoord[2] <= tileRange.maxY;\n ++tileCoord[2]\n ) {\n extents.push(\n toUserExtent(tileGrid.getTileCoordExtent(tileCoord), projection),\n );\n }\n }\n return extents;\n }\n );\n}\n","/**\n * @module ol/geom/MultiLineString\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport LineString from './LineString.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {arrayMaxSquaredDelta, assignClosestArrayPoint} from './flat/closest.js';\nimport {deflateCoordinatesArray} from './flat/deflate.js';\nimport {inflateCoordinatesArray} from './flat/inflate.js';\nimport {\n interpolatePoint,\n lineStringsCoordinateAtM,\n} from './flat/interpolate.js';\nimport {intersectsLineStringArray} from './flat/intersectsextent.js';\nimport {lineStringLength} from './flat/length.js';\nimport {douglasPeuckerArray} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Multi-linestring geometry.\n *\n * @api\n */\nclass MultiLineString extends SimpleGeometry {\n /**\n * @param {Array|LineString>|Array} coordinates\n * Coordinates or LineString geometries. (For internal use, flat coordinates in\n * combination with `layout` and `ends` are also accepted.)\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @param {Array} [ends] Flat coordinate ends for internal use.\n */\n constructor(coordinates, layout, ends) {\n super();\n\n /**\n * @type {Array}\n * @private\n */\n this.ends_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n if (Array.isArray(coordinates[0])) {\n this.setCoordinates(\n /** @type {Array>} */ (\n coordinates\n ),\n layout,\n );\n } else if (layout !== undefined && ends) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n this.ends_ = ends;\n } else {\n const lineStrings = /** @type {Array} */ (coordinates);\n /** @type {Array} */\n const flatCoordinates = [];\n const ends = [];\n for (let i = 0, ii = lineStrings.length; i < ii; ++i) {\n const lineString = lineStrings[i];\n extend(flatCoordinates, lineString.getFlatCoordinates());\n ends.push(flatCoordinates.length);\n }\n const layout =\n lineStrings.length === 0\n ? this.getLayout()\n : lineStrings[0].getLayout();\n this.setFlatCoordinates(layout, flatCoordinates);\n this.ends_ = ends;\n }\n }\n\n /**\n * Append the passed linestring to the multilinestring.\n * @param {LineString} lineString LineString.\n * @api\n */\n appendLineString(lineString) {\n extend(this.flatCoordinates, lineString.getFlatCoordinates().slice());\n this.ends_.push(this.flatCoordinates.length);\n this.changed();\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!MultiLineString} Clone.\n * @api\n * @override\n */\n clone() {\n const multiLineString = new MultiLineString(\n this.flatCoordinates.slice(),\n this.layout,\n this.ends_.slice(),\n );\n multiLineString.applyProperties(this);\n return multiLineString;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n arrayMaxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n 0,\n ),\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestArrayPoint(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n this.maxDelta_,\n false,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n );\n }\n\n /**\n * Returns the coordinate at `m` using linear interpolation, or `null` if no\n * such coordinate exists.\n *\n * `extrapolate` controls extrapolation beyond the range of Ms in the\n * MultiLineString. If `extrapolate` is `true` then Ms less than the first\n * M will return the first coordinate and Ms greater than the last M will\n * return the last coordinate.\n *\n * `interpolate` controls interpolation between consecutive LineStrings\n * within the MultiLineString. If `interpolate` is `true` the coordinates\n * will be linearly interpolated between the last coordinate of one LineString\n * and the first coordinate of the next LineString. If `interpolate` is\n * `false` then the function will return `null` for Ms falling between\n * LineStrings.\n *\n * @param {number} m M.\n * @param {boolean} [extrapolate] Extrapolate. Default is `false`.\n * @param {boolean} [interpolate] Interpolate. Default is `false`.\n * @return {import(\"../coordinate.js\").Coordinate|null} Coordinate.\n * @api\n */\n getCoordinateAtM(m, extrapolate, interpolate) {\n if (\n (this.layout != 'XYM' && this.layout != 'XYZM') ||\n this.flatCoordinates.length === 0\n ) {\n return null;\n }\n extrapolate = extrapolate !== undefined ? extrapolate : false;\n interpolate = interpolate !== undefined ? interpolate : false;\n return lineStringsCoordinateAtM(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n m,\n extrapolate,\n interpolate,\n );\n }\n\n /**\n * Return the coordinates of the multilinestring.\n * @return {Array>} Coordinates.\n * @api\n * @override\n */\n getCoordinates() {\n return inflateCoordinatesArray(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n );\n }\n\n /**\n * @return {Array} Ends.\n */\n getEnds() {\n return this.ends_;\n }\n\n /**\n * Return the linestring at the specified index.\n * @param {number} index Index.\n * @return {LineString} LineString.\n * @api\n */\n getLineString(index) {\n if (index < 0 || this.ends_.length <= index) {\n return null;\n }\n return new LineString(\n this.flatCoordinates.slice(\n index === 0 ? 0 : this.ends_[index - 1],\n this.ends_[index],\n ),\n this.layout,\n );\n }\n\n /**\n * Return the linestrings of this multilinestring.\n * @return {Array} LineStrings.\n * @api\n */\n getLineStrings() {\n const flatCoordinates = this.flatCoordinates;\n const ends = this.ends_;\n const layout = this.layout;\n /** @type {Array} */\n const lineStrings = [];\n let offset = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const lineString = new LineString(\n flatCoordinates.slice(offset, end),\n layout,\n );\n lineStrings.push(lineString);\n offset = end;\n }\n return lineStrings;\n }\n\n /**\n * Return the sum of all line string lengths\n * @return {number} Length (on projected plane).\n * @api\n */\n getLength() {\n const ends = this.ends_;\n let start = 0;\n let length = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n length += lineStringLength(\n this.flatCoordinates,\n start,\n ends[i],\n this.stride,\n );\n start = ends[i];\n }\n return length;\n }\n\n /**\n * @return {Array} Flat midpoints.\n */\n getFlatMidpoints() {\n /** @type {Array} */\n const midpoints = [];\n const flatCoordinates = this.flatCoordinates;\n let offset = 0;\n const ends = this.ends_;\n const stride = this.stride;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const midpoint = interpolatePoint(\n flatCoordinates,\n offset,\n end,\n stride,\n 0.5,\n );\n extend(midpoints, midpoint);\n offset = end;\n }\n return midpoints;\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {MultiLineString} Simplified MultiLineString.\n * @protected\n * @override\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n /** @type {Array} */\n const simplifiedFlatCoordinates = [];\n /** @type {Array} */\n const simplifiedEnds = [];\n simplifiedFlatCoordinates.length = douglasPeuckerArray(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n simplifiedEnds,\n );\n return new MultiLineString(simplifiedFlatCoordinates, 'XY', simplifiedEnds);\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'MultiLineString';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return intersectsLineStringArray(\n this.flatCoordinates,\n 0,\n this.ends_,\n this.stride,\n extent,\n );\n }\n\n /**\n * Set the coordinates of the multilinestring.\n * @param {!Array>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 2);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n const ends = deflateCoordinatesArray(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n this.ends_,\n );\n this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n this.changed();\n }\n}\n\nexport default MultiLineString;\n","/**\n * @module ol/geom/MultiPoint\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY, containsXY} from '../extent.js';\nimport {squaredDistance as squaredDx} from '../math.js';\nimport Point from './Point.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {inflateCoordinates} from './flat/inflate.js';\n\n/**\n * @classdesc\n * Multi-point geometry.\n *\n * @api\n */\nclass MultiPoint extends SimpleGeometry {\n /**\n * @param {Array|Array} coordinates Coordinates.\n * For internal use, flat coordinates in combination with `layout` are also accepted.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n */\n constructor(coordinates, layout) {\n super();\n if (layout && !Array.isArray(coordinates[0])) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n } else {\n this.setCoordinates(\n /** @type {Array} */ (\n coordinates\n ),\n layout,\n );\n }\n }\n\n /**\n * Append the passed point to this multipoint.\n * @param {Point} point Point.\n * @api\n */\n appendPoint(point) {\n extend(this.flatCoordinates, point.getFlatCoordinates());\n this.changed();\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!MultiPoint} Clone.\n * @api\n * @override\n */\n clone() {\n const multiPoint = new MultiPoint(\n this.flatCoordinates.slice(),\n this.layout,\n );\n multiPoint.applyProperties(this);\n return multiPoint;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n const flatCoordinates = this.flatCoordinates;\n const stride = this.stride;\n for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n const squaredDistance = squaredDx(\n x,\n y,\n flatCoordinates[i],\n flatCoordinates[i + 1],\n );\n if (squaredDistance < minSquaredDistance) {\n minSquaredDistance = squaredDistance;\n for (let j = 0; j < stride; ++j) {\n closestPoint[j] = flatCoordinates[i + j];\n }\n closestPoint.length = stride;\n }\n }\n return minSquaredDistance;\n }\n\n /**\n * Return the coordinates of the multipoint.\n * @return {Array} Coordinates.\n * @api\n * @override\n */\n getCoordinates() {\n return inflateCoordinates(\n this.flatCoordinates,\n 0,\n this.flatCoordinates.length,\n this.stride,\n );\n }\n\n /**\n * Return the point at the specified index.\n * @param {number} index Index.\n * @return {Point} Point.\n * @api\n */\n getPoint(index) {\n const n = this.flatCoordinates.length / this.stride;\n if (index < 0 || n <= index) {\n return null;\n }\n return new Point(\n this.flatCoordinates.slice(\n index * this.stride,\n (index + 1) * this.stride,\n ),\n this.layout,\n );\n }\n\n /**\n * Return the points of this multipoint.\n * @return {Array} Points.\n * @api\n */\n getPoints() {\n const flatCoordinates = this.flatCoordinates;\n const layout = this.layout;\n const stride = this.stride;\n /** @type {Array} */\n const points = [];\n for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n const point = new Point(flatCoordinates.slice(i, i + stride), layout);\n points.push(point);\n }\n return points;\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'MultiPoint';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n const flatCoordinates = this.flatCoordinates;\n const stride = this.stride;\n for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n const x = flatCoordinates[i];\n const y = flatCoordinates[i + 1];\n if (containsXY(extent, x, y)) {\n return true;\n }\n }\n return false;\n }\n\n /**\n * Set the coordinates of the multipoint.\n * @param {!Array} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 1);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinates(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n );\n this.changed();\n }\n}\n\nexport default MultiPoint;\n","/**\n * @module ol/geom/flat/center\n */\nimport {createEmpty, createOrUpdateFromFlatCoordinates} from '../../extent.js';\n\n/**\n * @param {Array} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array>} endss Endss.\n * @param {number} stride Stride.\n * @return {Array} Flat centers.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n const flatCenters = [];\n let extent = createEmpty();\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n extent = createOrUpdateFromFlatCoordinates(\n flatCoordinates,\n offset,\n ends[0],\n stride,\n );\n flatCenters.push((extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2);\n offset = ends[ends.length - 1];\n }\n return flatCenters;\n}\n","/**\n * @module ol/geom/MultiPolygon\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport MultiPoint from './MultiPoint.js';\nimport Polygon from './Polygon.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {linearRingss as linearRingssArea} from './flat/area.js';\nimport {linearRingss as linearRingssCenter} from './flat/center.js';\nimport {\n assignClosestMultiArrayPoint,\n multiArrayMaxSquaredDelta,\n} from './flat/closest.js';\nimport {linearRingssContainsXY} from './flat/contains.js';\nimport {deflateMultiCoordinatesArray} from './flat/deflate.js';\nimport {inflateMultiCoordinatesArray} from './flat/inflate.js';\nimport {getInteriorPointsOfMultiArray} from './flat/interiorpoint.js';\nimport {intersectsLinearRingMultiArray} from './flat/intersectsextent.js';\nimport {\n linearRingssAreOriented,\n orientLinearRingsArray,\n} from './flat/orient.js';\nimport {quantizeMultiArray} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Multi-polygon geometry.\n *\n * @api\n */\nclass MultiPolygon extends SimpleGeometry {\n /**\n * @param {Array>|Polygon>|Array} coordinates Coordinates.\n * For internal use, flat coordinates in combination with `layout` and `endss` are also accepted.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @param {Array>} [endss] Array of ends for internal use with flat coordinates.\n */\n constructor(coordinates, layout, endss) {\n super();\n\n /**\n * @type {Array>}\n * @private\n */\n this.endss_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.flatInteriorPointsRevision_ = -1;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.flatInteriorPoints_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.orientedRevision_ = -1;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.orientedFlatCoordinates_ = null;\n\n if (!endss && !Array.isArray(coordinates[0])) {\n const polygons = /** @type {Array} */ (coordinates);\n /** @type {Array} */\n const flatCoordinates = [];\n const thisEndss = [];\n for (let i = 0, ii = polygons.length; i < ii; ++i) {\n const polygon = polygons[i];\n const offset = flatCoordinates.length;\n const ends = polygon.getEnds();\n for (let j = 0, jj = ends.length; j < jj; ++j) {\n ends[j] += offset;\n }\n extend(flatCoordinates, polygon.getFlatCoordinates());\n thisEndss.push(ends);\n }\n layout =\n polygons.length === 0 ? this.getLayout() : polygons[0].getLayout();\n coordinates = flatCoordinates;\n endss = thisEndss;\n }\n if (layout !== undefined && endss) {\n this.setFlatCoordinates(\n layout,\n /** @type {Array} */ (coordinates),\n );\n this.endss_ = endss;\n } else {\n this.setCoordinates(\n /** @type {Array>>} */ (\n coordinates\n ),\n layout,\n );\n }\n }\n\n /**\n * Append the passed polygon to this multipolygon.\n * @param {Polygon} polygon Polygon.\n * @api\n */\n appendPolygon(polygon) {\n /** @type {Array} */\n let ends;\n if (!this.flatCoordinates) {\n this.flatCoordinates = polygon.getFlatCoordinates().slice();\n ends = polygon.getEnds().slice();\n this.endss_.push();\n } else {\n const offset = this.flatCoordinates.length;\n extend(this.flatCoordinates, polygon.getFlatCoordinates());\n ends = polygon.getEnds().slice();\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n ends[i] += offset;\n }\n }\n this.endss_.push(ends);\n this.changed();\n }\n\n /**\n * Make a complete copy of the geometry.\n * @return {!MultiPolygon} Clone.\n * @api\n * @override\n */\n clone() {\n const len = this.endss_.length;\n const newEndss = new Array(len);\n for (let i = 0; i < len; ++i) {\n newEndss[i] = this.endss_[i].slice();\n }\n\n const multiPolygon = new MultiPolygon(\n this.flatCoordinates.slice(),\n this.layout,\n newEndss,\n );\n multiPolygon.applyProperties(this);\n\n return multiPolygon;\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n * @override\n */\n closestPointXY(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(\n multiArrayMaxSquaredDelta(\n this.flatCoordinates,\n 0,\n this.endss_,\n this.stride,\n 0,\n ),\n );\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestMultiArrayPoint(\n this.getOrientedFlatCoordinates(),\n 0,\n this.endss_,\n this.stride,\n this.maxDelta_,\n true,\n x,\n y,\n closestPoint,\n minSquaredDistance,\n );\n }\n\n /**\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n * @override\n */\n containsXY(x, y) {\n return linearRingssContainsXY(\n this.getOrientedFlatCoordinates(),\n 0,\n this.endss_,\n this.stride,\n x,\n y,\n );\n }\n\n /**\n * Return the area of the multipolygon on projected plane.\n * @return {number} Area (on projected plane).\n * @api\n */\n getArea() {\n return linearRingssArea(\n this.getOrientedFlatCoordinates(),\n 0,\n this.endss_,\n this.stride,\n );\n }\n\n /**\n * Get the coordinate array for this geometry. This array has the structure\n * of a GeoJSON coordinate array for multi-polygons.\n *\n * @param {boolean} [right] Orient coordinates according to the right-hand\n * rule (counter-clockwise for exterior and clockwise for interior rings).\n * If `false`, coordinates will be oriented according to the left-hand rule\n * (clockwise for exterior and counter-clockwise for interior rings).\n * By default, coordinate orientation will depend on how the geometry was\n * constructed.\n * @return {Array>>} Coordinates.\n * @api\n * @override\n */\n getCoordinates(right) {\n let flatCoordinates;\n if (right !== undefined) {\n flatCoordinates = this.getOrientedFlatCoordinates().slice();\n orientLinearRingsArray(\n flatCoordinates,\n 0,\n this.endss_,\n this.stride,\n right,\n );\n } else {\n flatCoordinates = this.flatCoordinates;\n }\n\n return inflateMultiCoordinatesArray(\n flatCoordinates,\n 0,\n this.endss_,\n this.stride,\n );\n }\n\n /**\n * @return {Array>} Endss.\n */\n getEndss() {\n return this.endss_;\n }\n\n /**\n * @return {Array} Flat interior points.\n */\n getFlatInteriorPoints() {\n if (this.flatInteriorPointsRevision_ != this.getRevision()) {\n const flatCenters = linearRingssCenter(\n this.flatCoordinates,\n 0,\n this.endss_,\n this.stride,\n );\n this.flatInteriorPoints_ = getInteriorPointsOfMultiArray(\n this.getOrientedFlatCoordinates(),\n 0,\n this.endss_,\n this.stride,\n flatCenters,\n );\n this.flatInteriorPointsRevision_ = this.getRevision();\n }\n return /** @type {Array} */ (this.flatInteriorPoints_);\n }\n\n /**\n * Return the interior points as {@link module:ol/geom/MultiPoint~MultiPoint multipoint}.\n * @return {MultiPoint} Interior points as XYM coordinates, where M is\n * the length of the horizontal intersection that the point belongs to.\n * @api\n */\n getInteriorPoints() {\n return new MultiPoint(this.getFlatInteriorPoints().slice(), 'XYM');\n }\n\n /**\n * @return {Array} Oriented flat coordinates.\n */\n getOrientedFlatCoordinates() {\n if (this.orientedRevision_ != this.getRevision()) {\n const flatCoordinates = this.flatCoordinates;\n if (\n linearRingssAreOriented(flatCoordinates, 0, this.endss_, this.stride)\n ) {\n this.orientedFlatCoordinates_ = flatCoordinates;\n } else {\n this.orientedFlatCoordinates_ = flatCoordinates.slice();\n this.orientedFlatCoordinates_.length = orientLinearRingsArray(\n this.orientedFlatCoordinates_,\n 0,\n this.endss_,\n this.stride,\n );\n }\n this.orientedRevision_ = this.getRevision();\n }\n return /** @type {Array} */ (this.orientedFlatCoordinates_);\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {MultiPolygon} Simplified MultiPolygon.\n * @protected\n * @override\n */\n getSimplifiedGeometryInternal(squaredTolerance) {\n /** @type {Array} */\n const simplifiedFlatCoordinates = [];\n /** @type {Array>} */\n const simplifiedEndss = [];\n simplifiedFlatCoordinates.length = quantizeMultiArray(\n this.flatCoordinates,\n 0,\n this.endss_,\n this.stride,\n Math.sqrt(squaredTolerance),\n simplifiedFlatCoordinates,\n 0,\n simplifiedEndss,\n );\n return new MultiPolygon(simplifiedFlatCoordinates, 'XY', simplifiedEndss);\n }\n\n /**\n * Return the polygon at the specified index.\n * @param {number} index Index.\n * @return {Polygon} Polygon.\n * @api\n */\n getPolygon(index) {\n if (index < 0 || this.endss_.length <= index) {\n return null;\n }\n let offset;\n if (index === 0) {\n offset = 0;\n } else {\n const prevEnds = this.endss_[index - 1];\n offset = prevEnds[prevEnds.length - 1];\n }\n const ends = this.endss_[index].slice();\n const end = ends[ends.length - 1];\n if (offset !== 0) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n ends[i] -= offset;\n }\n }\n return new Polygon(\n this.flatCoordinates.slice(offset, end),\n this.layout,\n ends,\n );\n }\n\n /**\n * Return the polygons of this multipolygon.\n * @return {Array} Polygons.\n * @api\n */\n getPolygons() {\n const layout = this.layout;\n const flatCoordinates = this.flatCoordinates;\n const endss = this.endss_;\n const polygons = [];\n let offset = 0;\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i].slice();\n const end = ends[ends.length - 1];\n if (offset !== 0) {\n for (let j = 0, jj = ends.length; j < jj; ++j) {\n ends[j] -= offset;\n }\n }\n const polygon = new Polygon(\n flatCoordinates.slice(offset, end),\n layout,\n ends,\n );\n polygons.push(polygon);\n offset = end;\n }\n return polygons;\n }\n\n /**\n * Get the type of this geometry.\n * @return {import(\"./Geometry.js\").Type} Geometry type.\n * @api\n * @override\n */\n getType() {\n return 'MultiPolygon';\n }\n\n /**\n * Test if the geometry and the passed extent intersect.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n * @api\n * @override\n */\n intersectsExtent(extent) {\n return intersectsLinearRingMultiArray(\n this.getOrientedFlatCoordinates(),\n 0,\n this.endss_,\n this.stride,\n extent,\n );\n }\n\n /**\n * Set the coordinates of the multipolygon.\n * @param {!Array>>} coordinates Coordinates.\n * @param {import(\"./Geometry.js\").GeometryLayout} [layout] Layout.\n * @api\n * @override\n */\n setCoordinates(coordinates, layout) {\n this.setLayout(layout, coordinates, 3);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n const endss = deflateMultiCoordinatesArray(\n this.flatCoordinates,\n 0,\n coordinates,\n this.stride,\n this.endss_,\n );\n if (endss.length === 0) {\n this.flatCoordinates.length = 0;\n } else {\n const lastEnds = endss[endss.length - 1];\n this.flatCoordinates.length =\n lastEnds.length === 0 ? 0 : lastEnds[lastEnds.length - 1];\n }\n this.changed();\n }\n}\n\nexport default MultiPolygon;\n","/**\n * @module ol/render/Feature\n */\nimport Feature from '../Feature.js';\nimport {extend} from '../array.js';\nimport {\n createOrUpdateFromCoordinate,\n createOrUpdateFromFlatCoordinates,\n getCenter,\n getHeight,\n} from '../extent.js';\nimport {memoizeOne} from '../functions.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {linearRingss as linearRingssCenter} from '../geom/flat/center.js';\nimport {\n getInteriorPointOfArray,\n getInteriorPointsOfMultiArray,\n} from '../geom/flat/interiorpoint.js';\nimport {interpolatePoint} from '../geom/flat/interpolate.js';\nimport {inflateEnds} from '../geom/flat/orient.js';\nimport {\n douglasPeucker,\n douglasPeuckerArray,\n quantizeArray,\n} from '../geom/flat/simplify.js';\nimport {transform2D} from '../geom/flat/transform.js';\nimport {get as getProjection} from '../proj.js';\nimport {\n compose as composeTransform,\n create as createTransform,\n} from '../transform.js';\n\n/**\n * @typedef {'Point' | 'LineString' | 'LinearRing' | 'Polygon' | 'MultiPoint' | 'MultiLineString'} Type\n * The geometry type. One of `'Point'`, `'LineString'`, `'LinearRing'`,\n * `'Polygon'`, `'MultiPoint'` or 'MultiLineString'`.\n */\n\n/**\n * @type {import(\"../transform.js\").Transform}\n */\nconst tmpTransform = createTransform();\n\n/**\n * Lightweight, read-only, {@link module:ol/Feature~Feature} and {@link module:ol/geom/Geometry~Geometry} like\n * structure, optimized for vector tile rendering and styling. Geometry access\n * through the API is limited to getting the type and extent of the geometry.\n */\nclass RenderFeature {\n /**\n * @param {Type} type Geometry type.\n * @param {Array} flatCoordinates Flat coordinates. These always need\n * to be right-handed for polygons.\n * @param {Array} ends Ends.\n * @param {number} stride Stride.\n * @param {Object} properties Properties.\n * @param {number|string|undefined} id Feature id.\n */\n constructor(type, flatCoordinates, ends, stride, properties, id) {\n /**\n * @type {import(\"../style/Style.js\").StyleFunction|undefined}\n */\n this.styleFunction;\n\n /**\n * @private\n * @type {import(\"../extent.js\").Extent|undefined}\n */\n this.extent_;\n\n /**\n * @private\n * @type {number|string|undefined}\n */\n this.id_ = id;\n\n /**\n * @private\n * @type {Type}\n */\n this.type_ = type;\n\n /**\n * @private\n * @type {Array}\n */\n this.flatCoordinates_ = flatCoordinates;\n\n /**\n * @private\n * @type {Array}\n */\n this.flatInteriorPoints_ = null;\n\n /**\n * @private\n * @type {Array}\n */\n this.flatMidpoints_ = null;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.ends_ = ends || null;\n\n /**\n * @private\n * @type {Object}\n */\n this.properties_ = properties;\n\n /**\n * @private\n * @type {number}\n */\n this.squaredTolerance_;\n\n /**\n * @private\n * @type {number}\n */\n this.stride_ = stride;\n\n /**\n * @private\n * @type {RenderFeature}\n */\n this.simplifiedGeometry_;\n }\n\n /**\n * Get a feature property by its key.\n * @param {string} key Key\n * @return {*} Value for the requested key.\n * @api\n */\n get(key) {\n return this.properties_[key];\n }\n\n /**\n * Get the extent of this feature's geometry.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\n getExtent() {\n if (!this.extent_) {\n this.extent_ =\n this.type_ === 'Point'\n ? createOrUpdateFromCoordinate(this.flatCoordinates_)\n : createOrUpdateFromFlatCoordinates(\n this.flatCoordinates_,\n 0,\n this.flatCoordinates_.length,\n this.stride_,\n );\n }\n return this.extent_;\n }\n\n /**\n * @return {Array} Flat interior points.\n */\n getFlatInteriorPoint() {\n if (!this.flatInteriorPoints_) {\n const flatCenter = getCenter(this.getExtent());\n this.flatInteriorPoints_ = getInteriorPointOfArray(\n this.flatCoordinates_,\n 0,\n this.ends_,\n this.stride_,\n flatCenter,\n 0,\n );\n }\n return this.flatInteriorPoints_;\n }\n\n /**\n * @return {Array} Flat interior points.\n */\n getFlatInteriorPoints() {\n if (!this.flatInteriorPoints_) {\n const ends = inflateEnds(this.flatCoordinates_, this.ends_);\n const flatCenters = linearRingssCenter(\n this.flatCoordinates_,\n 0,\n ends,\n this.stride_,\n );\n this.flatInteriorPoints_ = getInteriorPointsOfMultiArray(\n this.flatCoordinates_,\n 0,\n ends,\n this.stride_,\n flatCenters,\n );\n }\n return this.flatInteriorPoints_;\n }\n\n /**\n * @return {Array} Flat midpoint.\n */\n getFlatMidpoint() {\n if (!this.flatMidpoints_) {\n this.flatMidpoints_ = interpolatePoint(\n this.flatCoordinates_,\n 0,\n this.flatCoordinates_.length,\n this.stride_,\n 0.5,\n );\n }\n return this.flatMidpoints_;\n }\n\n /**\n * @return {Array} Flat midpoints.\n */\n getFlatMidpoints() {\n if (!this.flatMidpoints_) {\n this.flatMidpoints_ = [];\n const flatCoordinates = this.flatCoordinates_;\n let offset = 0;\n const ends = /** @type {Array} */ (this.ends_);\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const midpoint = interpolatePoint(\n flatCoordinates,\n offset,\n end,\n this.stride_,\n 0.5,\n );\n extend(this.flatMidpoints_, midpoint);\n offset = end;\n }\n }\n return this.flatMidpoints_;\n }\n\n /**\n * Get the feature identifier. This is a stable identifier for the feature and\n * is set when reading data from a remote source.\n * @return {number|string|undefined} Id.\n * @api\n */\n getId() {\n return this.id_;\n }\n\n /**\n * @return {Array} Flat coordinates.\n */\n getOrientedFlatCoordinates() {\n return this.flatCoordinates_;\n }\n\n /**\n * For API compatibility with {@link module:ol/Feature~Feature}, this method is useful when\n * determining the geometry type in style function (see {@link #getType}).\n * @return {RenderFeature} Feature.\n * @api\n */\n getGeometry() {\n return this;\n }\n\n /**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {RenderFeature} Simplified geometry.\n */\n getSimplifiedGeometry(squaredTolerance) {\n return this;\n }\n\n /**\n * Get a transformed and simplified version of the geometry.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {import(\"../proj.js\").TransformFunction} [transform] Optional transform function.\n * @return {RenderFeature} Simplified geometry.\n */\n simplifyTransformed(squaredTolerance, transform) {\n return this;\n }\n\n /**\n * Get the feature properties.\n * @return {Object} Feature properties.\n * @api\n */\n getProperties() {\n return this.properties_;\n }\n\n /**\n * Get an object of all property names and values. This has the same behavior as getProperties,\n * but is here to conform with the {@link module:ol/Feature~Feature} interface.\n * @return {Object?} Object.\n */\n getPropertiesInternal() {\n return this.properties_;\n }\n\n /**\n * @return {number} Stride.\n */\n getStride() {\n return this.stride_;\n }\n\n /**\n * @return {import('../style/Style.js').StyleFunction|undefined} Style\n */\n getStyleFunction() {\n return this.styleFunction;\n }\n\n /**\n * Get the type of this feature's geometry.\n * @return {Type} Geometry type.\n * @api\n */\n getType() {\n return this.type_;\n }\n\n /**\n * Transform geometry coordinates from tile pixel space to projected.\n *\n * @param {import(\"../proj.js\").ProjectionLike} projection The data projection\n */\n transform(projection) {\n projection = getProjection(projection);\n const pixelExtent = projection.getExtent();\n const projectedExtent = projection.getWorldExtent();\n if (pixelExtent && projectedExtent) {\n const scale = getHeight(projectedExtent) / getHeight(pixelExtent);\n composeTransform(\n tmpTransform,\n projectedExtent[0],\n projectedExtent[3],\n scale,\n -scale,\n 0,\n 0,\n 0,\n );\n transform2D(\n this.flatCoordinates_,\n 0,\n this.flatCoordinates_.length,\n this.stride_,\n tmpTransform,\n this.flatCoordinates_,\n );\n }\n }\n\n /**\n * Apply a transform function to the coordinates of the geometry.\n * The geometry is modified in place.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform function.\n */\n applyTransform(transformFn) {\n transformFn(this.flatCoordinates_, this.flatCoordinates_, this.stride_);\n }\n\n /**\n * @return {RenderFeature} A cloned render feature.\n */\n clone() {\n return new RenderFeature(\n this.type_,\n this.flatCoordinates_.slice(),\n this.ends_?.slice(),\n this.stride_,\n Object.assign({}, this.properties_),\n this.id_,\n );\n }\n\n /**\n * @return {Array|null} Ends.\n */\n getEnds() {\n return this.ends_;\n }\n\n /**\n * Add transform and resolution based geometry simplification to this instance.\n * @return {RenderFeature} This render feature.\n */\n enableSimplifyTransformed() {\n this.simplifyTransformed = memoizeOne((squaredTolerance, transform) => {\n if (squaredTolerance === this.squaredTolerance_) {\n return this.simplifiedGeometry_;\n }\n this.simplifiedGeometry_ = this.clone();\n if (transform) {\n this.simplifiedGeometry_.applyTransform(transform);\n }\n const simplifiedFlatCoordinates =\n this.simplifiedGeometry_.getFlatCoordinates();\n let simplifiedEnds;\n switch (this.type_) {\n case 'LineString':\n simplifiedFlatCoordinates.length = douglasPeucker(\n simplifiedFlatCoordinates,\n 0,\n this.simplifiedGeometry_.flatCoordinates_.length,\n this.simplifiedGeometry_.stride_,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n );\n simplifiedEnds = [simplifiedFlatCoordinates.length];\n break;\n case 'MultiLineString':\n simplifiedEnds = [];\n simplifiedFlatCoordinates.length = douglasPeuckerArray(\n simplifiedFlatCoordinates,\n 0,\n this.simplifiedGeometry_.ends_,\n this.simplifiedGeometry_.stride_,\n squaredTolerance,\n simplifiedFlatCoordinates,\n 0,\n simplifiedEnds,\n );\n break;\n case 'Polygon':\n simplifiedEnds = [];\n simplifiedFlatCoordinates.length = quantizeArray(\n simplifiedFlatCoordinates,\n 0,\n this.simplifiedGeometry_.ends_,\n this.simplifiedGeometry_.stride_,\n Math.sqrt(squaredTolerance),\n simplifiedFlatCoordinates,\n 0,\n simplifiedEnds,\n );\n break;\n default:\n }\n if (simplifiedEnds) {\n this.simplifiedGeometry_ = new RenderFeature(\n this.type_,\n simplifiedFlatCoordinates,\n simplifiedEnds,\n this.stride_,\n this.properties_,\n this.id_,\n );\n }\n this.squaredTolerance_ = squaredTolerance;\n return this.simplifiedGeometry_;\n });\n return this;\n }\n}\n\n/**\n * @return {Array} Flat coordinates.\n */\nRenderFeature.prototype.getFlatCoordinates =\n RenderFeature.prototype.getOrientedFlatCoordinates;\n\n/**\n * Create a geometry from an `ol/render/Feature`\n * @param {RenderFeature} renderFeature\n * Render Feature\n * @return {Point|MultiPoint|LineString|MultiLineString|Polygon|MultiPolygon}\n * New geometry instance.\n * @api\n */\nexport function toGeometry(renderFeature) {\n const geometryType = renderFeature.getType();\n switch (geometryType) {\n case 'Point':\n return new Point(renderFeature.getFlatCoordinates());\n case 'MultiPoint':\n return new MultiPoint(renderFeature.getFlatCoordinates(), 'XY');\n case 'LineString':\n return new LineString(renderFeature.getFlatCoordinates(), 'XY');\n case 'MultiLineString':\n return new MultiLineString(\n renderFeature.getFlatCoordinates(),\n 'XY',\n /** @type {Array} */ (renderFeature.getEnds()),\n );\n case 'Polygon':\n const flatCoordinates = renderFeature.getFlatCoordinates();\n const ends = renderFeature.getEnds();\n const endss = inflateEnds(flatCoordinates, ends);\n return endss.length > 1\n ? new MultiPolygon(flatCoordinates, 'XY', endss)\n : new Polygon(flatCoordinates, 'XY', ends);\n default:\n throw new Error('Invalid geometry type:' + geometryType);\n }\n}\n\n/**\n * Create an `ol/Feature` from an `ol/render/Feature`\n * @param {RenderFeature} renderFeature RenderFeature\n * @param {string} [geometryName] Geometry name to use\n * when creating the Feature.\n * @return {Feature} Newly constructed `ol/Feature` with properties,\n * geometry, and id copied over.\n * @api\n */\nexport function toFeature(renderFeature, geometryName) {\n const id = renderFeature.getId();\n const geometry = toGeometry(renderFeature);\n const properties = renderFeature.getProperties();\n const feature = new Feature();\n if (geometryName !== undefined) {\n feature.setGeometryName(geometryName);\n }\n feature.setGeometry(geometry);\n if (id !== undefined) {\n feature.setId(id);\n }\n feature.setProperties(properties, true);\n return feature;\n}\n\nexport default RenderFeature;\n","\n/**\n * Rearranges items so that all items in the [left, k] are the smallest.\n * The k-th element will have the (k - left + 1)-th smallest value in [left, right].\n *\n * @template T\n * @param {T[]} arr the array to partially sort (in place)\n * @param {number} k middle index for partial sorting (as defined above)\n * @param {number} [left=0] left index of the range to sort\n * @param {number} [right=arr.length-1] right index\n * @param {(a: T, b: T) => number} [compare = (a, b) => a - b] compare function\n */\nexport default function quickselect(arr, k, left = 0, right = arr.length - 1, compare = defaultCompare) {\n\n while (right > left) {\n if (right - left > 600) {\n const n = right - left + 1;\n const m = k - left + 1;\n const z = Math.log(n);\n const s = 0.5 * Math.exp(2 * z / 3);\n const sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);\n const newLeft = Math.max(left, Math.floor(k - m * s / n + sd));\n const newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));\n quickselect(arr, k, newLeft, newRight, compare);\n }\n\n const t = arr[k];\n let i = left;\n /** @type {number} */\n let j = right;\n\n swap(arr, left, k);\n if (compare(arr[right], t) > 0) swap(arr, left, right);\n\n while (i < j) {\n swap(arr, i, j);\n i++;\n j--;\n while (compare(arr[i], t) < 0) i++;\n while (compare(arr[j], t) > 0) j--;\n }\n\n if (compare(arr[left], t) === 0) swap(arr, left, j);\n else {\n j++;\n swap(arr, j, right);\n }\n\n if (j <= k) left = j + 1;\n if (k <= j) right = j - 1;\n }\n}\n\n/**\n * @template T\n * @param {T[]} arr\n * @param {number} i\n * @param {number} j\n */\nfunction swap(arr, i, j) {\n const tmp = arr[i];\n arr[i] = arr[j];\n arr[j] = tmp;\n}\n\n/**\n * @template T\n * @param {T} a\n * @param {T} b\n * @returns {number}\n */\nfunction defaultCompare(a, b) {\n return a < b ? -1 : a > b ? 1 : 0;\n}\n","import quickselect from 'quickselect';\n\nexport default class RBush {\n constructor(maxEntries = 9) {\n // max entries in a node is 9 by default; min node fill is 40% for best performance\n this._maxEntries = Math.max(4, maxEntries);\n this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));\n this.clear();\n }\n\n all() {\n return this._all(this.data, []);\n }\n\n search(bbox) {\n let node = this.data;\n const result = [];\n\n if (!intersects(bbox, node)) return result;\n\n const toBBox = this.toBBox;\n const nodesToSearch = [];\n\n while (node) {\n for (let i = 0; i < node.children.length; i++) {\n const child = node.children[i];\n const childBBox = node.leaf ? toBBox(child) : child;\n\n if (intersects(bbox, childBBox)) {\n if (node.leaf) result.push(child);\n else if (contains(bbox, childBBox)) this._all(child, result);\n else nodesToSearch.push(child);\n }\n }\n node = nodesToSearch.pop();\n }\n\n return result;\n }\n\n collides(bbox) {\n let node = this.data;\n\n if (!intersects(bbox, node)) return false;\n\n const nodesToSearch = [];\n while (node) {\n for (let i = 0; i < node.children.length; i++) {\n const child = node.children[i];\n const childBBox = node.leaf ? this.toBBox(child) : child;\n\n if (intersects(bbox, childBBox)) {\n if (node.leaf || contains(bbox, childBBox)) return true;\n nodesToSearch.push(child);\n }\n }\n node = nodesToSearch.pop();\n }\n\n return false;\n }\n\n load(data) {\n if (!(data && data.length)) return this;\n\n if (data.length < this._minEntries) {\n for (let i = 0; i < data.length; i++) {\n this.insert(data[i]);\n }\n return this;\n }\n\n // recursively build the tree with the given data from scratch using OMT algorithm\n let node = this._build(data.slice(), 0, data.length - 1, 0);\n\n if (!this.data.children.length) {\n // save as is if tree is empty\n this.data = node;\n\n } else if (this.data.height === node.height) {\n // split root if trees have the same height\n this._splitRoot(this.data, node);\n\n } else {\n if (this.data.height < node.height) {\n // swap trees if inserted one is bigger\n const tmpNode = this.data;\n this.data = node;\n node = tmpNode;\n }\n\n // insert the small tree into the large tree at appropriate level\n this._insert(node, this.data.height - node.height - 1, true);\n }\n\n return this;\n }\n\n insert(item) {\n if (item) this._insert(item, this.data.height - 1);\n return this;\n }\n\n clear() {\n this.data = createNode([]);\n return this;\n }\n\n remove(item, equalsFn) {\n if (!item) return this;\n\n let node = this.data;\n const bbox = this.toBBox(item);\n const path = [];\n const indexes = [];\n let i, parent, goingUp;\n\n // depth-first iterative tree traversal\n while (node || path.length) {\n\n if (!node) { // go up\n node = path.pop();\n parent = path[path.length - 1];\n i = indexes.pop();\n goingUp = true;\n }\n\n if (node.leaf) { // check current node\n const index = findItem(item, node.children, equalsFn);\n\n if (index !== -1) {\n // item found, remove the item and condense tree upwards\n node.children.splice(index, 1);\n path.push(node);\n this._condense(path);\n return this;\n }\n }\n\n if (!goingUp && !node.leaf && contains(node, bbox)) { // go down\n path.push(node);\n indexes.push(i);\n i = 0;\n parent = node;\n node = node.children[0];\n\n } else if (parent) { // go right\n i++;\n node = parent.children[i];\n goingUp = false;\n\n } else node = null; // nothing found\n }\n\n return this;\n }\n\n toBBox(item) { return item; }\n\n compareMinX(a, b) { return a.minX - b.minX; }\n compareMinY(a, b) { return a.minY - b.minY; }\n\n toJSON() { return this.data; }\n\n fromJSON(data) {\n this.data = data;\n return this;\n }\n\n _all(node, result) {\n const nodesToSearch = [];\n while (node) {\n if (node.leaf) result.push(...node.children);\n else nodesToSearch.push(...node.children);\n\n node = nodesToSearch.pop();\n }\n return result;\n }\n\n _build(items, left, right, height) {\n\n const N = right - left + 1;\n let M = this._maxEntries;\n let node;\n\n if (N <= M) {\n // reached leaf level; return leaf\n node = createNode(items.slice(left, right + 1));\n calcBBox(node, this.toBBox);\n return node;\n }\n\n if (!height) {\n // target height of the bulk-loaded tree\n height = Math.ceil(Math.log(N) / Math.log(M));\n\n // target number of root entries to maximize storage utilization\n M = Math.ceil(N / Math.pow(M, height - 1));\n }\n\n node = createNode([]);\n node.leaf = false;\n node.height = height;\n\n // split the items into M mostly square tiles\n\n const N2 = Math.ceil(N / M);\n const N1 = N2 * Math.ceil(Math.sqrt(M));\n\n multiSelect(items, left, right, N1, this.compareMinX);\n\n for (let i = left; i <= right; i += N1) {\n\n const right2 = Math.min(i + N1 - 1, right);\n\n multiSelect(items, i, right2, N2, this.compareMinY);\n\n for (let j = i; j <= right2; j += N2) {\n\n const right3 = Math.min(j + N2 - 1, right2);\n\n // pack each entry recursively\n node.children.push(this._build(items, j, right3, height - 1));\n }\n }\n\n calcBBox(node, this.toBBox);\n\n return node;\n }\n\n _chooseSubtree(bbox, node, level, path) {\n while (true) {\n path.push(node);\n\n if (node.leaf || path.length - 1 === level) break;\n\n let minArea = Infinity;\n let minEnlargement = Infinity;\n let targetNode;\n\n for (let i = 0; i < node.children.length; i++) {\n const child = node.children[i];\n const area = bboxArea(child);\n const enlargement = enlargedArea(bbox, child) - area;\n\n // choose entry with the least area enlargement\n if (enlargement < minEnlargement) {\n minEnlargement = enlargement;\n minArea = area < minArea ? area : minArea;\n targetNode = child;\n\n } else if (enlargement === minEnlargement) {\n // otherwise choose one with the smallest area\n if (area < minArea) {\n minArea = area;\n targetNode = child;\n }\n }\n }\n\n node = targetNode || node.children[0];\n }\n\n return node;\n }\n\n _insert(item, level, isNode) {\n const bbox = isNode ? item : this.toBBox(item);\n const insertPath = [];\n\n // find the best node for accommodating the item, saving all nodes along the path too\n const node = this._chooseSubtree(bbox, this.data, level, insertPath);\n\n // put the item into the node\n node.children.push(item);\n extend(node, bbox);\n\n // split on node overflow; propagate upwards if necessary\n while (level >= 0) {\n if (insertPath[level].children.length > this._maxEntries) {\n this._split(insertPath, level);\n level--;\n } else break;\n }\n\n // adjust bboxes along the insertion path\n this._adjustParentBBoxes(bbox, insertPath, level);\n }\n\n // split overflowed node into two\n _split(insertPath, level) {\n const node = insertPath[level];\n const M = node.children.length;\n const m = this._minEntries;\n\n this._chooseSplitAxis(node, m, M);\n\n const splitIndex = this._chooseSplitIndex(node, m, M);\n\n const newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));\n newNode.height = node.height;\n newNode.leaf = node.leaf;\n\n calcBBox(node, this.toBBox);\n calcBBox(newNode, this.toBBox);\n\n if (level) insertPath[level - 1].children.push(newNode);\n else this._splitRoot(node, newNode);\n }\n\n _splitRoot(node, newNode) {\n // split root node\n this.data = createNode([node, newNode]);\n this.data.height = node.height + 1;\n this.data.leaf = false;\n calcBBox(this.data, this.toBBox);\n }\n\n _chooseSplitIndex(node, m, M) {\n let index;\n let minOverlap = Infinity;\n let minArea = Infinity;\n\n for (let i = m; i <= M - m; i++) {\n const bbox1 = distBBox(node, 0, i, this.toBBox);\n const bbox2 = distBBox(node, i, M, this.toBBox);\n\n const overlap = intersectionArea(bbox1, bbox2);\n const area = bboxArea(bbox1) + bboxArea(bbox2);\n\n // choose distribution with minimum overlap\n if (overlap < minOverlap) {\n minOverlap = overlap;\n index = i;\n\n minArea = area < minArea ? area : minArea;\n\n } else if (overlap === minOverlap) {\n // otherwise choose distribution with minimum area\n if (area < minArea) {\n minArea = area;\n index = i;\n }\n }\n }\n\n return index || M - m;\n }\n\n // sorts node children by the best axis for split\n _chooseSplitAxis(node, m, M) {\n const compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;\n const compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;\n const xMargin = this._allDistMargin(node, m, M, compareMinX);\n const yMargin = this._allDistMargin(node, m, M, compareMinY);\n\n // if total distributions margin value is minimal for x, sort by minX,\n // otherwise it's already sorted by minY\n if (xMargin < yMargin) node.children.sort(compareMinX);\n }\n\n // total margin of all possible split distributions where each node is at least m full\n _allDistMargin(node, m, M, compare) {\n node.children.sort(compare);\n\n const toBBox = this.toBBox;\n const leftBBox = distBBox(node, 0, m, toBBox);\n const rightBBox = distBBox(node, M - m, M, toBBox);\n let margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);\n\n for (let i = m; i < M - m; i++) {\n const child = node.children[i];\n extend(leftBBox, node.leaf ? toBBox(child) : child);\n margin += bboxMargin(leftBBox);\n }\n\n for (let i = M - m - 1; i >= m; i--) {\n const child = node.children[i];\n extend(rightBBox, node.leaf ? toBBox(child) : child);\n margin += bboxMargin(rightBBox);\n }\n\n return margin;\n }\n\n _adjustParentBBoxes(bbox, path, level) {\n // adjust bboxes along the given tree path\n for (let i = level; i >= 0; i--) {\n extend(path[i], bbox);\n }\n }\n\n _condense(path) {\n // go through the path, removing empty nodes and updating bboxes\n for (let i = path.length - 1, siblings; i >= 0; i--) {\n if (path[i].children.length === 0) {\n if (i > 0) {\n siblings = path[i - 1].children;\n siblings.splice(siblings.indexOf(path[i]), 1);\n\n } else this.clear();\n\n } else calcBBox(path[i], this.toBBox);\n }\n }\n}\n\nfunction findItem(item, items, equalsFn) {\n if (!equalsFn) return items.indexOf(item);\n\n for (let i = 0; i < items.length; i++) {\n if (equalsFn(item, items[i])) return i;\n }\n return -1;\n}\n\n// calculate node's bbox from bboxes of its children\nfunction calcBBox(node, toBBox) {\n distBBox(node, 0, node.children.length, toBBox, node);\n}\n\n// min bounding rectangle of node children from k to p-1\nfunction distBBox(node, k, p, toBBox, destNode) {\n if (!destNode) destNode = createNode(null);\n destNode.minX = Infinity;\n destNode.minY = Infinity;\n destNode.maxX = -Infinity;\n destNode.maxY = -Infinity;\n\n for (let i = k; i < p; i++) {\n const child = node.children[i];\n extend(destNode, node.leaf ? toBBox(child) : child);\n }\n\n return destNode;\n}\n\nfunction extend(a, b) {\n a.minX = Math.min(a.minX, b.minX);\n a.minY = Math.min(a.minY, b.minY);\n a.maxX = Math.max(a.maxX, b.maxX);\n a.maxY = Math.max(a.maxY, b.maxY);\n return a;\n}\n\nfunction compareNodeMinX(a, b) { return a.minX - b.minX; }\nfunction compareNodeMinY(a, b) { return a.minY - b.minY; }\n\nfunction bboxArea(a) { return (a.maxX - a.minX) * (a.maxY - a.minY); }\nfunction bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }\n\nfunction enlargedArea(a, b) {\n return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *\n (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));\n}\n\nfunction intersectionArea(a, b) {\n const minX = Math.max(a.minX, b.minX);\n const minY = Math.max(a.minY, b.minY);\n const maxX = Math.min(a.maxX, b.maxX);\n const maxY = Math.min(a.maxY, b.maxY);\n\n return Math.max(0, maxX - minX) *\n Math.max(0, maxY - minY);\n}\n\nfunction contains(a, b) {\n return a.minX <= b.minX &&\n a.minY <= b.minY &&\n b.maxX <= a.maxX &&\n b.maxY <= a.maxY;\n}\n\nfunction intersects(a, b) {\n return b.minX <= a.maxX &&\n b.minY <= a.maxY &&\n b.maxX >= a.minX &&\n b.maxY >= a.minY;\n}\n\nfunction createNode(children) {\n return {\n children,\n height: 1,\n leaf: true,\n minX: Infinity,\n minY: Infinity,\n maxX: -Infinity,\n maxY: -Infinity\n };\n}\n\n// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;\n// combines selection algorithm with binary divide & conquer approach\n\nfunction multiSelect(arr, left, right, n, compare) {\n const stack = [left, right];\n\n while (stack.length) {\n right = stack.pop();\n left = stack.pop();\n\n if (right - left <= n) continue;\n\n const mid = left + Math.ceil((right - left) / n / 2) * n;\n quickselect(arr, mid, left, right, compare);\n\n stack.push(left, mid, mid, right);\n }\n}\n","/**\n * @module ol/structs/RBush\n */\nimport RBush_ from 'rbush';\nimport {createOrUpdate, equals} from '../extent.js';\nimport {isEmpty} from '../obj.js';\nimport {getUid} from '../util.js';\n\n/**\n * @typedef {import(\"rbush\").BBox & {value: T}} Entry\n * @template T\n */\n\n/**\n * @classdesc\n * Wrapper around the RBush by Vladimir Agafonkin.\n * See https://github.com/mourner/rbush.\n *\n * @template {Object} T\n */\nclass RBush {\n /**\n * @param {number} [maxEntries] Max entries.\n */\n constructor(maxEntries) {\n /**\n * @private\n * @type {RBush_>}\n */\n this.rbush_ = new RBush_(maxEntries);\n\n /**\n * A mapping between the objects added to this rbush wrapper\n * and the objects that are actually added to the internal rbush.\n * @private\n * @type {Object>}\n */\n this.items_ = {};\n }\n\n /**\n * Insert a value into the RBush.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {T} value Value.\n */\n insert(extent, value) {\n /** @type {Entry} */\n const item = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3],\n value: value,\n };\n\n this.rbush_.insert(item);\n this.items_[getUid(value)] = item;\n }\n\n /**\n * Bulk-insert values into the RBush.\n * @param {Array} extents Extents.\n * @param {Array} values Values.\n */\n load(extents, values) {\n const items = new Array(values.length);\n for (let i = 0, l = values.length; i < l; i++) {\n const extent = extents[i];\n const value = values[i];\n\n /** @type {Entry} */\n const item = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3],\n value: value,\n };\n items[i] = item;\n this.items_[getUid(value)] = item;\n }\n this.rbush_.load(items);\n }\n\n /**\n * Remove a value from the RBush.\n * @param {T} value Value.\n * @return {boolean} Removed.\n */\n remove(value) {\n const uid = getUid(value);\n\n // get the object in which the value was wrapped when adding to the\n // internal rbush. then use that object to do the removal.\n const item = this.items_[uid];\n delete this.items_[uid];\n return this.rbush_.remove(item) !== null;\n }\n\n /**\n * Update the extent of a value in the RBush.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {T} value Value.\n */\n update(extent, value) {\n const item = this.items_[getUid(value)];\n const bbox = [item.minX, item.minY, item.maxX, item.maxY];\n if (!equals(bbox, extent)) {\n this.remove(value);\n this.insert(extent, value);\n }\n }\n\n /**\n * Return all values in the RBush.\n * @return {Array} All.\n */\n getAll() {\n const items = this.rbush_.all();\n return items.map(function (item) {\n return item.value;\n });\n }\n\n /**\n * Return all values in the given extent.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {Array} All in extent.\n */\n getInExtent(extent) {\n /** @type {import(\"rbush\").BBox} */\n const bbox = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3],\n };\n const items = this.rbush_.search(bbox);\n return items.map(function (item) {\n return item.value;\n });\n }\n\n /**\n * Calls a callback function with each value in the tree.\n * If the callback returns a truthy value, this value is returned without\n * checking the rest of the tree.\n * @param {function(T): R} callback Callback.\n * @return {R|undefined} Callback return value.\n * @template R\n */\n forEach(callback) {\n return this.forEach_(this.getAll(), callback);\n }\n\n /**\n * Calls a callback function with each value in the provided extent.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {function(T): R} callback Callback.\n * @return {R|undefined} Callback return value.\n * @template R\n */\n forEachInExtent(extent, callback) {\n return this.forEach_(this.getInExtent(extent), callback);\n }\n\n /**\n * @param {Array} values Values.\n * @param {function(T): R} callback Callback.\n * @return {R|undefined} Callback return value.\n * @template R\n * @private\n */\n forEach_(values, callback) {\n let result;\n for (let i = 0, l = values.length; i < l; i++) {\n result = callback(values[i]);\n if (result) {\n return result;\n }\n }\n return result;\n }\n\n /**\n * @return {boolean} Is empty.\n */\n isEmpty() {\n return isEmpty(this.items_);\n }\n\n /**\n * Remove all values from the RBush.\n */\n clear() {\n this.rbush_.clear();\n this.items_ = {};\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} [extent] Extent.\n * @return {import(\"../extent.js\").Extent} Extent.\n */\n getExtent(extent) {\n const data = this.rbush_.toJSON();\n return createOrUpdate(data.minX, data.minY, data.maxX, data.maxY, extent);\n }\n\n /**\n * @param {RBush} rbush R-Tree.\n */\n concat(rbush) {\n this.rbush_.load(rbush.rbush_.all());\n for (const i in rbush.items_) {\n this.items_[i] = rbush.items_[i];\n }\n }\n}\n\nexport default RBush;\n","/**\n * @module ol/source/Source\n */\nimport BaseObject from '../Object.js';\nimport {get as getProjection} from '../proj.js';\n\n/**\n * @typedef {'undefined' | 'loading' | 'ready' | 'error'} State\n * State of the source, one of 'undefined', 'loading', 'ready' or 'error'.\n */\n\n/**\n * A function that takes a {@link import(\"../View.js\").ViewStateLayerStateExtent} and returns a string or\n * an array of strings representing source attributions.\n *\n * @typedef {function(import(\"../View.js\").ViewStateLayerStateExtent): (string|Array)} Attribution\n */\n\n/**\n * A type that can be used to provide attribution information for data sources.\n *\n * It represents either\n * a simple string (e.g. `'© Acme Inc.'`)\n * an array of simple strings (e.g. `['© Acme Inc.', '© Bacme Inc.']`)\n * a function that returns a string or array of strings ({@link module:ol/source/Source~Attribution})\n *\n * @typedef {string|Array|Attribution} AttributionLike\n */\n\n/**\n * @typedef {Object} Options\n * @property {AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {import(\"../proj.js\").ProjectionLike} [projection] Projection. Default is the view projection.\n * @property {import(\"./Source.js\").State} [state='ready'] State.\n * @property {boolean} [wrapX=false] WrapX.\n * @property {boolean} [interpolate=false] Use interpolated values when resampling. By default,\n * the nearest neighbor is used when resampling.\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for {@link module:ol/layer/Layer~Layer} sources.\n *\n * A generic `change` event is triggered when the state of the source changes.\n * @abstract\n * @api\n */\nclass Source extends BaseObject {\n /**\n * @param {Options} options Source options.\n */\n constructor(options) {\n super();\n\n /**\n * @protected\n * @type {import(\"../proj/Projection.js\").default|null}\n */\n this.projection = getProjection(options.projection);\n\n /**\n * @private\n * @type {?Attribution}\n */\n this.attributions_ = adaptAttributions(options.attributions);\n\n /**\n * @private\n * @type {boolean}\n */\n this.attributionsCollapsible_ = options.attributionsCollapsible ?? true;\n\n /**\n * This source is currently loading data. Sources that defer loading to the\n * map's tile queue never set this to a `truthy` value.\n * @type {boolean|number}\n */\n this.loading = false;\n\n /**\n * @private\n * @type {import(\"./Source.js\").State}\n */\n this.state_ = options.state !== undefined ? options.state : 'ready';\n\n /**\n * @private\n * @type {boolean}\n */\n this.wrapX_ = options.wrapX !== undefined ? options.wrapX : false;\n\n /**\n * @private\n * @type {boolean}\n */\n this.interpolate_ = !!options.interpolate;\n\n /**\n * @protected\n * @type {function(import(\"../View.js\").ViewOptions):void}\n */\n this.viewResolver = null;\n\n /**\n * @protected\n * @type {function(Error):void}\n */\n this.viewRejector = null;\n\n const self = this;\n /**\n * @private\n * @type {Promise}\n */\n this.viewPromise_ = new Promise(function (resolve, reject) {\n self.viewResolver = resolve;\n self.viewRejector = reject;\n });\n }\n\n /**\n * Get the attribution function for the source.\n * @return {?Attribution} Attribution function.\n * @api\n */\n getAttributions() {\n return this.attributions_;\n }\n\n /**\n * @return {boolean} Attributions are collapsible.\n * @api\n */\n getAttributionsCollapsible() {\n return this.attributionsCollapsible_;\n }\n\n /**\n * Get the projection of the source.\n * @return {import(\"../proj/Projection.js\").default|null} Projection.\n * @api\n */\n getProjection() {\n return this.projection;\n }\n\n /**\n * @param {import(\"../proj/Projection.js\").default} [projection] Projection.\n * @return {Array|null} Resolutions.\n */\n getResolutions(projection) {\n return null;\n }\n\n /**\n * @return {Promise} A promise for view-related properties.\n */\n getView() {\n return this.viewPromise_;\n }\n\n /**\n * Get the state of the source, see {@link import(\"./Source.js\").State} for possible states.\n * @return {import(\"./Source.js\").State} State.\n * @api\n */\n getState() {\n return this.state_;\n }\n\n /**\n * @return {boolean|undefined} Wrap X.\n */\n getWrapX() {\n return this.wrapX_;\n }\n\n /**\n * @return {boolean} Use linear interpolation when resampling.\n */\n getInterpolate() {\n return this.interpolate_;\n }\n\n /**\n * Refreshes the source. The source will be cleared, and data from the server will be reloaded.\n * @api\n */\n refresh() {\n this.changed();\n }\n\n /**\n * Set the attributions of the source.\n * @param {AttributionLike|undefined} attributions Attributions.\n * Can be passed as `string`, `Array`, {@link module:ol/source/Source~Attribution},\n * or `undefined`.\n * @api\n */\n setAttributions(attributions) {\n this.attributions_ = adaptAttributions(attributions);\n this.changed();\n }\n\n /**\n * Set the state of the source.\n * @param {import(\"./Source.js\").State} state State.\n */\n setState(state) {\n this.state_ = state;\n this.changed();\n }\n}\n\n/**\n * Turns the attributions option into an attributions function.\n * @param {AttributionLike|undefined} attributionLike The attribution option.\n * @return {Attribution|null} An attribution function (or null).\n */\nfunction adaptAttributions(attributionLike) {\n if (!attributionLike) {\n return null;\n }\n if (typeof attributionLike === 'function') {\n return attributionLike;\n }\n if (!Array.isArray(attributionLike)) {\n attributionLike = [attributionLike];\n }\n return (frameState) => attributionLike;\n}\n\nexport default Source;\n","/**\n * @module ol/source/VectorEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when a feature is added to the source.\n * @event module:ol/source/Vector.VectorSourceEvent#addfeature\n * @api\n */\n ADDFEATURE: 'addfeature',\n\n /**\n * Triggered when a feature is updated.\n * @event module:ol/source/Vector.VectorSourceEvent#changefeature\n * @api\n */\n CHANGEFEATURE: 'changefeature',\n\n /**\n * Triggered when the clear method is called on the source.\n * @event module:ol/source/Vector.VectorSourceEvent#clear\n * @api\n */\n CLEAR: 'clear',\n\n /**\n * Triggered when a feature is removed from the source.\n * See {@link module:ol/source/Vector~VectorSource#clear source.clear()} for exceptions.\n * @event module:ol/source/Vector.VectorSourceEvent#removefeature\n * @api\n */\n REMOVEFEATURE: 'removefeature',\n\n /**\n * Triggered when features starts loading.\n * @event module:ol/source/Vector.VectorSourceEvent#featuresloadstart\n * @api\n */\n FEATURESLOADSTART: 'featuresloadstart',\n\n /**\n * Triggered when features finishes loading.\n * @event module:ol/source/Vector.VectorSourceEvent#featuresloadend\n * @api\n */\n FEATURESLOADEND: 'featuresloadend',\n\n /**\n * Triggered if feature loading results in an error.\n * @event module:ol/source/Vector.VectorSourceEvent#featuresloaderror\n * @api\n */\n FEATURESLOADERROR: 'featuresloaderror',\n};\n\n/**\n * @typedef {'addfeature'|'changefeature'|'clear'|'removefeature'|'featuresloadstart'|'featuresloadend'|'featuresloaderror'} VectorSourceEventTypes\n */\n","/**\n * @module ol/source/Vector\n */\n\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport {extend} from '../array.js';\nimport {assert} from '../asserts.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport {containsExtent, equals, wrapAndSliceX} from '../extent.js';\nimport {xhr} from '../featureloader.js';\nimport {TRUE, VOID} from '../functions.js';\nimport {all as allStrategy} from '../loadingstrategy.js';\nimport {isEmpty} from '../obj.js';\nimport RenderFeature from '../render/Feature.js';\nimport RBush from '../structs/RBush.js';\nimport {getUid} from '../util.js';\nimport Source from './Source.js';\nimport VectorEventType from './VectorEventType.js';\n\n/**\n * A function that takes an {@link module:ol/extent~Extent} and a resolution as arguments, and\n * returns an array of {@link module:ol/extent~Extent} with the extents to load. Usually this\n * is one of the standard {@link module:ol/loadingstrategy} strategies.\n *\n * @typedef {function(import(\"../extent.js\").Extent, number, import(\"../proj/Projection.js\").default): Array} LoadingStrategy\n * @api\n */\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Vector~VectorSource} instances are instances of this\n * type.\n * @template {import(\"../Feature.js\").FeatureLike} [FeatureType=import(\"../Feature.js\").default]\n */\nexport class VectorSourceEvent extends Event {\n /**\n * @param {string} type Type.\n * @param {FeatureType} [feature] Feature.\n * @param {Array} [features] Features.\n */\n constructor(type, feature, features) {\n super(type);\n\n /**\n * The added or removed feature for the `ADDFEATURE` and `REMOVEFEATURE` events, `undefined` otherwise.\n * @type {FeatureType|undefined}\n * @api\n */\n this.feature = feature;\n\n /**\n * The loaded features for the `FEATURESLOADED` event, `undefined` otherwise.\n * @type {Array|undefined}\n * @api\n */\n this.features = features;\n }\n}\n\n/***\n * @template {import(\"../Feature.js\").FeatureLike} [T=import(\"../Feature.js\").default]\n * @typedef {T extends RenderFeature ? T|Array : T} FeatureClassOrArrayOfRenderFeatures\n */\n\n/***\n * @template Return\n * @template {import(\"../Feature.js\").FeatureLike} [FeatureType=import(\"../Feature.js\").default]\n * @typedef {import(\"../Observable.js\").OnSignature &\n * import(\"../Observable.js\").OnSignature &\n * import(\"../Observable.js\").OnSignature, Return> &\n * import(\"../Observable.js\").CombinedOnSignature} VectorSourceOnSignature\n */\n\n/**\n * @template {import(\"../Feature.js\").FeatureLike} [FeatureType=import(\"../Feature.js\").default]\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {Array|Collection} [features]\n * Features. If provided as {@link module:ol/Collection~Collection}, the features in the source\n * and the collection will stay in sync.\n * @property {import(\"../format/Feature.js\").default} [format] The feature format used by the XHR\n * feature loader when `url` is set. Required if `url` is set, otherwise ignored.\n * @property {import(\"../featureloader.js\").FeatureLoader} [loader]\n * The loader function used to load features, from a remote source for example.\n * If this is not set and `url` is set, the source will create and use an XHR\n * feature loader. The `'featuresloadend'` and `'featuresloaderror'` events\n * will only fire if the `success` and `failure` callbacks are used.\n *\n * Example:\n *\n * ```js\n * import Vector from 'ol/source/Vector.js';\n * import GeoJSON from 'ol/format/GeoJSON.js';\n * import {bbox} from 'ol/loadingstrategy.js';\n *\n * const vectorSource = new Vector({\n * loader: async (extent, resolution, projection) => {\n * const url = 'https://ahocevar.com/geoserver/wfs?service=WFS&' +\n * 'version=1.1.0&request=GetFeature&typename=osm:water_areas&' +\n * 'outputFormat=application/json' +\n * 'bbox=' + extent.join(',') + ',' + projection.getCode();\n * const response = await fetch(url);\n * if (!response.ok) {\n * throw new Error('Network response was not ok');\n * }\n * const json = await response.json();\n * const features = new GeoJSON().readFeatures(json, {\n * featureProjection: projection,\n * });\n * return features;\n * },\n * strategy: bbox,\n * });\n * ```\n *\n * When you want to retry a failed request, use\n * ```js\n * vectorSource.removeLoadedExtent(extent);\n * vectorSource.changed();\n * ```\n *\n * @property {boolean} [overlaps=true] This source may have overlapping geometries.\n * Setting this to `false` (e.g. for sources with polygons that represent administrative\n * boundaries or TopoJSON sources) allows the renderer to optimise fill and\n * stroke operations.\n * @property {LoadingStrategy} [strategy] The loading strategy to use.\n * By default an {@link module:ol/loadingstrategy.all}\n * strategy is used, a one-off strategy which loads all features at once.\n * @property {string|import(\"../featureloader.js\").FeatureUrlFunction} [url]\n * Setting this option instructs the source to load features using an XHR loader\n * (see {@link module:ol/featureloader.xhr}). Use a `string` and an\n * {@link module:ol/loadingstrategy.all} for a one-off download of all features from\n * the given URL. Use a {@link module:ol/featureloader~FeatureUrlFunction} to generate the url with\n * other loading strategies.\n * Requires `format` to be set as well.\n * When default XHR feature loader is provided, the features will\n * be transformed from the data projection to the view projection\n * during parsing. If your remote data source does not advertise its projection\n * properly, this transformation will be incorrect. For some formats, the\n * default projection (usually EPSG:4326) can be overridden by setting the\n * dataProjection constructor option on the format.\n * Note that if a source contains non-feature data, such as a GeoJSON geometry\n * or a KML NetworkLink, these will be ignored. Use a custom loader to load these.\n * @property {boolean} [useSpatialIndex=true]\n * By default, an RTree is used as spatial index. When features are removed and\n * added frequently, and the total number of features is low, setting this to\n * `false` may improve performance.\n *\n * Note that\n * {@link module:ol/source/Vector~VectorSource#getFeaturesInExtent},\n * {@link module:ol/source/Vector~VectorSource#getClosestFeatureToCoordinate} and\n * {@link module:ol/source/Vector~VectorSource#getExtent} cannot be used when `useSpatialIndex` is\n * set to `false`, and {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent} will loop\n * through all features.\n *\n * When set to `false`, the features will be maintained in an\n * {@link module:ol/Collection~Collection}, which can be retrieved through\n * {@link module:ol/source/Vector~VectorSource#getFeaturesCollection}.\n * @property {boolean} [wrapX=true] Wrap the world horizontally. For vector editing across the\n * -180° and 180° meridians to work properly, this should be set to `false`. The\n * resulting geometry coordinates will then exceed the world bounds.\n */\n\n/**\n * @classdesc\n * Provides a source of features for vector layers. Vector features provided\n * by this source are suitable for editing. See {@link module:ol/source/VectorTile~VectorTile} for\n * vector data that is optimized for rendering.\n *\n * @fires VectorSourceEvent\n * @api\n * @template {import(\"../Feature.js\").FeatureLike} [FeatureType=import(\"../Feature.js\").default]\n */\nclass VectorSource extends Source {\n /**\n * @param {Options} [options] Vector source options.\n */\n constructor(options) {\n options = options || {};\n\n super({\n attributions: options.attributions,\n interpolate: true,\n projection: undefined,\n state: 'ready',\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n });\n\n /***\n * @type {VectorSourceOnSignature}\n */\n this.on;\n\n /***\n * @type {VectorSourceOnSignature}\n */\n this.once;\n\n /***\n * @type {VectorSourceOnSignature}\n */\n this.un;\n\n /**\n * @private\n * @type {import(\"../featureloader.js\").FeatureLoader}\n */\n this.loader_ = VOID;\n\n /**\n * @private\n * @type {import(\"../format/Feature.js\").default|null}\n */\n this.format_ = options.format || null;\n\n /**\n * @private\n * @type {boolean}\n */\n this.overlaps_ = options.overlaps === undefined ? true : options.overlaps;\n\n /**\n * @private\n * @type {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined}\n */\n this.url_ = options.url;\n\n if (options.loader !== undefined) {\n this.loader_ = options.loader;\n } else if (this.url_ !== undefined) {\n assert(this.format_, '`format` must be set when `url` is set');\n // create a XHR feature loader for \"url\" and \"format\"\n this.loader_ = xhr(this.url_, this.format_);\n }\n\n /**\n * @private\n * @type {LoadingStrategy}\n */\n this.strategy_ =\n options.strategy !== undefined ? options.strategy : allStrategy;\n\n const useSpatialIndex =\n options.useSpatialIndex !== undefined ? options.useSpatialIndex : true;\n\n /**\n * @private\n * @type {RBush}\n */\n this.featuresRtree_ = useSpatialIndex ? new RBush() : null;\n\n /**\n * @private\n * @type {RBush<{extent: import(\"../extent.js\").Extent}>}\n */\n this.loadedExtentsRtree_ = new RBush();\n\n /**\n * @private\n * @type {!Object}\n */\n this.nullGeometryFeatures_ = {};\n\n /**\n * A lookup of features by id (the return from feature.getId()).\n * @private\n * @type {!Object>}\n */\n this.idIndex_ = {};\n\n /**\n * A lookup of features by uid (using getUid(feature)).\n * @private\n * @type {!Object}\n */\n this.uidIndex_ = {};\n\n /**\n * @private\n * @type {Object>}\n */\n this.featureChangeKeys_ = {};\n\n /**\n * @private\n * @type {Collection|null}\n */\n this.featuresCollection_ = null;\n\n /** @type {Collection} */\n let collection;\n /** @type {Array} */\n let features;\n if (Array.isArray(options.features)) {\n features = options.features;\n } else if (options.features) {\n collection = options.features;\n features = collection.getArray();\n }\n if (!useSpatialIndex && collection === undefined) {\n collection = new Collection(features);\n }\n if (features !== undefined) {\n this.addFeaturesInternal(features);\n }\n if (collection !== undefined) {\n this.bindFeaturesCollection_(collection);\n }\n }\n\n /**\n * Add a single feature to the source. If you want to add a batch of features\n * at once, call {@link module:ol/source/Vector~VectorSource#addFeatures #addFeatures()}\n * instead. A feature will not be added to the source if feature with\n * the same id is already there. The reason for this behavior is to avoid\n * feature duplication when using bbox or tile loading strategies.\n * Note: this also applies if a {@link module:ol/Collection~Collection} is used for features,\n * meaning that if a feature with a duplicate id is added in the collection, it will\n * be removed from it right away.\n * @param {FeatureType} feature Feature to add.\n * @api\n */\n addFeature(feature) {\n this.addFeatureInternal(feature);\n this.changed();\n }\n\n /**\n * Add a feature without firing a `change` event.\n * @param {FeatureType} feature Feature.\n * @protected\n */\n addFeatureInternal(feature) {\n const featureKey = getUid(feature);\n\n if (!this.addToIndex_(featureKey, feature)) {\n if (this.featuresCollection_) {\n this.featuresCollection_.remove(feature);\n }\n return;\n }\n\n this.setupChangeEvents_(featureKey, feature);\n\n const geometry = feature.getGeometry();\n if (geometry) {\n const extent = geometry.getExtent();\n if (this.featuresRtree_) {\n this.featuresRtree_.insert(extent, feature);\n }\n } else {\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.ADDFEATURE, feature),\n );\n }\n\n /**\n * @param {string} featureKey Unique identifier for the feature.\n * @param {FeatureType} feature The feature.\n * @private\n */\n setupChangeEvents_(featureKey, feature) {\n if (feature instanceof RenderFeature) {\n return;\n }\n this.featureChangeKeys_[featureKey] = [\n listen(feature, EventType.CHANGE, this.handleFeatureChange_, this),\n listen(\n feature,\n ObjectEventType.PROPERTYCHANGE,\n this.handleFeatureChange_,\n this,\n ),\n ];\n }\n\n /**\n * @param {string} featureKey Unique identifier for the feature.\n * @param {FeatureType} feature The feature.\n * @return {boolean} The feature is \"valid\", in the sense that it is also a\n * candidate for insertion into the Rtree.\n * @private\n */\n addToIndex_(featureKey, feature) {\n let valid = true;\n if (feature.getId() !== undefined) {\n const id = String(feature.getId());\n if (!(id in this.idIndex_)) {\n this.idIndex_[id] = feature;\n } else if (feature instanceof RenderFeature) {\n const indexedFeature = this.idIndex_[id];\n if (!(indexedFeature instanceof RenderFeature)) {\n valid = false;\n } else if (!Array.isArray(indexedFeature)) {\n this.idIndex_[id] = [indexedFeature, feature];\n } else {\n indexedFeature.push(feature);\n }\n } else {\n valid = false;\n }\n }\n if (valid) {\n assert(\n !(featureKey in this.uidIndex_),\n 'The passed `feature` was already added to the source',\n );\n this.uidIndex_[featureKey] = feature;\n }\n return valid;\n }\n\n /**\n * Add a batch of features to the source.\n * @param {Array} features Features to add.\n * @api\n */\n addFeatures(features) {\n this.addFeaturesInternal(features);\n this.changed();\n }\n\n /**\n * Add features without firing a `change` event.\n * @param {Array} features Features.\n * @protected\n */\n addFeaturesInternal(features) {\n const extents = [];\n /** @type {Array} */\n const newFeatures = [];\n /** @type {Array} */\n const geometryFeatures = [];\n\n for (let i = 0, length = features.length; i < length; i++) {\n const feature = features[i];\n const featureKey = getUid(feature);\n if (this.addToIndex_(featureKey, feature)) {\n newFeatures.push(feature);\n }\n }\n\n for (let i = 0, length = newFeatures.length; i < length; i++) {\n const feature = newFeatures[i];\n const featureKey = getUid(feature);\n this.setupChangeEvents_(featureKey, feature);\n\n const geometry = feature.getGeometry();\n if (geometry) {\n const extent = geometry.getExtent();\n extents.push(extent);\n geometryFeatures.push(feature);\n } else {\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n }\n if (this.featuresRtree_) {\n this.featuresRtree_.load(extents, geometryFeatures);\n }\n\n if (this.hasListener(VectorEventType.ADDFEATURE)) {\n for (let i = 0, length = newFeatures.length; i < length; i++) {\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.ADDFEATURE, newFeatures[i]),\n );\n }\n }\n }\n\n /**\n * @param {!Collection} collection Collection.\n * @private\n */\n bindFeaturesCollection_(collection) {\n let modifyingCollection = false;\n this.addEventListener(\n VectorEventType.ADDFEATURE,\n /**\n * @param {VectorSourceEvent} evt The vector source event\n */\n function (evt) {\n if (!modifyingCollection) {\n modifyingCollection = true;\n collection.push(evt.feature);\n modifyingCollection = false;\n }\n },\n );\n this.addEventListener(\n VectorEventType.REMOVEFEATURE,\n /**\n * @param {VectorSourceEvent} evt The vector source event\n */\n function (evt) {\n if (!modifyingCollection) {\n modifyingCollection = true;\n collection.remove(evt.feature);\n modifyingCollection = false;\n }\n },\n );\n collection.addEventListener(\n CollectionEventType.ADD,\n /**\n * @param {import(\"../Collection.js\").CollectionEvent} evt The collection event\n */\n (evt) => {\n if (!modifyingCollection) {\n modifyingCollection = true;\n this.addFeature(evt.element);\n modifyingCollection = false;\n }\n },\n );\n collection.addEventListener(\n CollectionEventType.REMOVE,\n /**\n * @param {import(\"../Collection.js\").CollectionEvent} evt The collection event\n */\n (evt) => {\n if (!modifyingCollection) {\n modifyingCollection = true;\n this.removeFeature(evt.element);\n modifyingCollection = false;\n }\n },\n );\n this.featuresCollection_ = collection;\n }\n\n /**\n * Remove all features from the source.\n * @param {boolean} [fast] Skip dispatching of {@link module:ol/source/Vector.VectorSourceEvent#event:removefeature} events.\n * @api\n */\n clear(fast) {\n if (fast) {\n for (const featureId in this.featureChangeKeys_) {\n const keys = this.featureChangeKeys_[featureId];\n keys.forEach(unlistenByKey);\n }\n if (!this.featuresCollection_) {\n this.featureChangeKeys_ = {};\n this.idIndex_ = {};\n this.uidIndex_ = {};\n }\n } else {\n if (this.featuresRtree_) {\n this.featuresRtree_.forEach((feature) => {\n this.removeFeatureInternal(feature);\n });\n for (const id in this.nullGeometryFeatures_) {\n this.removeFeatureInternal(this.nullGeometryFeatures_[id]);\n }\n }\n }\n if (this.featuresCollection_) {\n this.featuresCollection_.clear();\n }\n\n if (this.featuresRtree_) {\n this.featuresRtree_.clear();\n }\n this.nullGeometryFeatures_ = {};\n\n const clearEvent = new VectorSourceEvent(VectorEventType.CLEAR);\n this.dispatchEvent(clearEvent);\n this.changed();\n }\n\n /**\n * Iterate through all features on the source, calling the provided callback\n * with each one. If the callback returns any \"truthy\" value, iteration will\n * stop and the function will return the same value.\n * Note: this function only iterate through the feature that have a defined geometry.\n *\n * @param {function(FeatureType): T} callback Called with each feature\n * on the source. Return a truthy value to stop iteration.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\n forEachFeature(callback) {\n if (this.featuresRtree_) {\n return this.featuresRtree_.forEach(callback);\n }\n if (this.featuresCollection_) {\n this.featuresCollection_.forEach(callback);\n }\n }\n\n /**\n * Iterate through all features whose geometries contain the provided\n * coordinate, calling the callback with each feature. If the callback returns\n * a \"truthy\" value, iteration will stop and the function will return the same\n * value.\n *\n * For {@link module:ol/render/Feature~RenderFeature} features, the callback will be\n * called for all features.\n *\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {function(FeatureType): T} callback Called with each feature\n * whose goemetry contains the provided coordinate.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n */\n forEachFeatureAtCoordinateDirect(coordinate, callback) {\n const extent = [coordinate[0], coordinate[1], coordinate[0], coordinate[1]];\n return this.forEachFeatureInExtent(extent, function (feature) {\n const geometry = feature.getGeometry();\n if (\n geometry instanceof RenderFeature ||\n geometry.intersectsCoordinate(coordinate)\n ) {\n return callback(feature);\n }\n return undefined;\n });\n }\n\n /**\n * Iterate through all features whose bounding box intersects the provided\n * extent (note that the feature's geometry may not intersect the extent),\n * calling the callback with each feature. If the callback returns a \"truthy\"\n * value, iteration will stop and the function will return the same value.\n *\n * If you are interested in features whose geometry intersects an extent, call\n * the {@link module:ol/source/Vector~VectorSource#forEachFeatureIntersectingExtent #forEachFeatureIntersectingExtent()} method instead.\n *\n * When `useSpatialIndex` is set to false, this method will loop through all\n * features, equivalent to {@link module:ol/source/Vector~VectorSource#forEachFeature #forEachFeature()}.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {function(FeatureType): T} callback Called with each feature\n * whose bounding box intersects the provided extent.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\n forEachFeatureInExtent(extent, callback) {\n if (this.featuresRtree_) {\n return this.featuresRtree_.forEachInExtent(extent, callback);\n }\n if (this.featuresCollection_) {\n this.featuresCollection_.forEach(callback);\n }\n }\n\n /**\n * Iterate through all features whose geometry intersects the provided extent,\n * calling the callback with each feature. If the callback returns a \"truthy\"\n * value, iteration will stop and the function will return the same value.\n *\n * If you only want to test for bounding box intersection, call the\n * {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent #forEachFeatureInExtent()} method instead.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {function(FeatureType): T} callback Called with each feature\n * whose geometry intersects the provided extent.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\n forEachFeatureIntersectingExtent(extent, callback) {\n return this.forEachFeatureInExtent(\n extent,\n /**\n * @param {FeatureType} feature Feature.\n * @return {T|undefined} The return value from the last call to the callback.\n */\n function (feature) {\n const geometry = feature.getGeometry();\n if (\n geometry instanceof RenderFeature ||\n geometry.intersectsExtent(extent)\n ) {\n const result = callback(feature);\n if (result) {\n return result;\n }\n }\n },\n );\n }\n\n /**\n * Get the features collection associated with this source. Will be `null`\n * unless the source was configured with `useSpatialIndex` set to `false`, or\n * with a {@link module:ol/Collection~Collection} as `features`.\n * @return {Collection|null} The collection of features.\n * @api\n */\n getFeaturesCollection() {\n return this.featuresCollection_;\n }\n\n /**\n * Get a snapshot of the features currently on the source in random order. The returned array\n * is a copy, the features are references to the features in the source.\n * @return {Array} Features.\n * @api\n */\n getFeatures() {\n let features;\n if (this.featuresCollection_) {\n features = this.featuresCollection_.getArray().slice(0);\n } else if (this.featuresRtree_) {\n features = this.featuresRtree_.getAll();\n if (!isEmpty(this.nullGeometryFeatures_)) {\n extend(features, Object.values(this.nullGeometryFeatures_));\n }\n }\n return features;\n }\n\n /**\n * Get all features whose geometry intersects the provided coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {Array} Features.\n * @api\n */\n getFeaturesAtCoordinate(coordinate) {\n /** @type {Array} */\n const features = [];\n this.forEachFeatureAtCoordinateDirect(coordinate, function (feature) {\n features.push(feature);\n });\n return features;\n }\n\n /**\n * Get all features whose bounding box intersects the provided extent. Note that this returns an array of\n * all features intersecting the given extent in random order (so it may include\n * features whose geometries do not intersect the extent).\n *\n * When `useSpatialIndex` is set to false, this method will return all\n * features.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {import(\"../proj/Projection.js\").default} [projection] Include features\n * where `extent` exceeds the x-axis bounds of `projection` and wraps around the world.\n * @return {Array} Features.\n * @api\n */\n getFeaturesInExtent(extent, projection) {\n if (this.featuresRtree_) {\n const multiWorld = projection && projection.canWrapX() && this.getWrapX();\n\n if (!multiWorld) {\n return this.featuresRtree_.getInExtent(extent);\n }\n\n const extents = wrapAndSliceX(extent, projection);\n\n return [].concat(\n ...extents.map((anExtent) => this.featuresRtree_.getInExtent(anExtent)),\n );\n }\n if (this.featuresCollection_) {\n return this.featuresCollection_.getArray().slice(0);\n }\n return [];\n }\n\n /**\n * Get the closest feature to the provided coordinate.\n *\n * This method is not available when the source is configured with\n * `useSpatialIndex` set to `false` and the features in this source are of type\n * {@link module:ol/Feature~Feature}.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {function(FeatureType):boolean} [filter] Feature filter function.\n * The filter function will receive one argument, the {@link module:ol/Feature~Feature feature}\n * and it should return a boolean value. By default, no filtering is made.\n * @return {FeatureType|null} Closest feature (or `null` if none found).\n * @api\n */\n getClosestFeatureToCoordinate(coordinate, filter) {\n // Find the closest feature using branch and bound. We start searching an\n // infinite extent, and find the distance from the first feature found. This\n // becomes the closest feature. We then compute a smaller extent which any\n // closer feature must intersect. We continue searching with this smaller\n // extent, trying to find a closer feature. Every time we find a closer\n // feature, we update the extent being searched so that any even closer\n // feature must intersect it. We continue until we run out of features.\n const x = coordinate[0];\n const y = coordinate[1];\n let closestFeature = null;\n const closestPoint = [NaN, NaN];\n let minSquaredDistance = Infinity;\n const extent = [-Infinity, -Infinity, Infinity, Infinity];\n filter = filter ? filter : TRUE;\n this.featuresRtree_.forEachInExtent(\n extent,\n /**\n * @param {FeatureType} feature Feature.\n */\n function (feature) {\n if (filter(feature)) {\n const geometry = feature.getGeometry();\n const previousMinSquaredDistance = minSquaredDistance;\n minSquaredDistance =\n geometry instanceof RenderFeature\n ? 0\n : geometry.closestPointXY(x, y, closestPoint, minSquaredDistance);\n if (minSquaredDistance < previousMinSquaredDistance) {\n closestFeature = feature;\n // This is sneaky. Reduce the extent that it is currently being\n // searched while the R-Tree traversal using this same extent object\n // is still in progress. This is safe because the new extent is\n // strictly contained by the old extent.\n const minDistance = Math.sqrt(minSquaredDistance);\n extent[0] = x - minDistance;\n extent[1] = y - minDistance;\n extent[2] = x + minDistance;\n extent[3] = y + minDistance;\n }\n }\n },\n );\n return closestFeature;\n }\n\n /**\n * Get the extent of the features currently in the source.\n *\n * This will return `null` when the source is configured with\n * `useSpatialIndex` set to `false`.\n * @param {import(\"../extent.js\").Extent} [extent] Destination extent. If provided, no new extent\n * will be created. Instead, that extent's coordinates will be overwritten.\n * @return {import(\"../extent.js\").Extent | null} Extent.\n * @api\n */\n getExtent(extent) {\n return this.featuresRtree_?.getExtent(extent) ?? null;\n }\n\n /**\n * Get a feature by its identifier (the value returned by feature.getId()). When `RenderFeature`s\n * are used, `getFeatureById()` can return an array of `RenderFeature`s. This allows for handling\n * of `GeometryCollection` geometries, where format readers create one `RenderFeature` per\n * `GeometryCollection` member.\n * Note that the index treats string and numeric identifiers as the same. So\n * `source.getFeatureById(2)` will return a feature with id `'2'` or `2`.\n *\n * @param {string|number} id Feature identifier.\n * @return {FeatureClassOrArrayOfRenderFeatures|null} The feature (or `null` if not found).\n * @api\n */\n getFeatureById(id) {\n const feature = this.idIndex_[id.toString()];\n return feature !== undefined\n ? /** @type {FeatureClassOrArrayOfRenderFeatures} */ (\n feature\n )\n : null;\n }\n\n /**\n * Get a feature by its internal unique identifier (using `getUid`).\n *\n * @param {string} uid Feature identifier.\n * @return {FeatureType|null} The feature (or `null` if not found).\n */\n getFeatureByUid(uid) {\n const feature = this.uidIndex_[uid];\n return feature !== undefined ? feature : null;\n }\n\n /**\n * Get the format associated with this source.\n *\n * @return {import(\"../format/Feature.js\").default|null}} The feature format.\n * @api\n */\n getFormat() {\n return this.format_;\n }\n\n /**\n * @return {boolean} The source can have overlapping geometries.\n */\n getOverlaps() {\n return this.overlaps_;\n }\n\n /**\n * Get the url associated with this source.\n *\n * @return {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined} The url.\n * @api\n */\n getUrl() {\n return this.url_;\n }\n\n /**\n * @param {Event} event Event.\n * @private\n */\n handleFeatureChange_(event) {\n const feature = /** @type {FeatureType} */ (event.target);\n const featureKey = getUid(feature);\n const geometry = feature.getGeometry();\n if (!geometry) {\n if (!(featureKey in this.nullGeometryFeatures_)) {\n if (this.featuresRtree_) {\n this.featuresRtree_.remove(feature);\n }\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n } else {\n const extent = geometry.getExtent();\n if (featureKey in this.nullGeometryFeatures_) {\n delete this.nullGeometryFeatures_[featureKey];\n if (this.featuresRtree_) {\n this.featuresRtree_.insert(extent, feature);\n }\n } else {\n if (this.featuresRtree_) {\n this.featuresRtree_.update(extent, feature);\n }\n }\n }\n const id = feature.getId();\n if (id !== undefined) {\n const sid = id.toString();\n if (this.idIndex_[sid] !== feature) {\n this.removeFromIdIndex_(feature);\n this.idIndex_[sid] = feature;\n }\n } else {\n this.removeFromIdIndex_(feature);\n this.uidIndex_[featureKey] = feature;\n }\n this.changed();\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.CHANGEFEATURE, feature),\n );\n }\n\n /**\n * Returns true if the feature is contained within the source.\n * @param {FeatureType} feature Feature.\n * @return {boolean} Has feature.\n * @api\n */\n hasFeature(feature) {\n const id = feature.getId();\n if (id !== undefined) {\n return id in this.idIndex_;\n }\n return getUid(feature) in this.uidIndex_;\n }\n\n /**\n * @return {boolean} Is empty.\n */\n isEmpty() {\n if (this.featuresRtree_) {\n return (\n this.featuresRtree_.isEmpty() && isEmpty(this.nullGeometryFeatures_)\n );\n }\n if (this.featuresCollection_) {\n return this.featuresCollection_.getLength() === 0;\n }\n return true;\n }\n\n /**\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {import(\"../proj/Projection.js\").default} projection Projection.\n */\n loadFeatures(extent, resolution, projection) {\n const loadedExtentsRtree = this.loadedExtentsRtree_;\n const extentsToLoad = this.strategy_(extent, resolution, projection);\n for (let i = 0, ii = extentsToLoad.length; i < ii; ++i) {\n const extentToLoad = extentsToLoad[i];\n const alreadyLoaded = loadedExtentsRtree.forEachInExtent(\n extentToLoad,\n /**\n * @param {{extent: import(\"../extent.js\").Extent}} object Object.\n * @return {boolean} Contains.\n */\n function (object) {\n return containsExtent(object.extent, extentToLoad);\n },\n );\n if (!alreadyLoaded) {\n this.loading = Number(this.loading) + 1;\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.FEATURESLOADSTART),\n );\n\n /**\n * @param {Array} features Loaded features\n */\n const success = (features) => {\n this.loading = Number(this.loading) - 1;\n this.dispatchEvent(\n new VectorSourceEvent(\n VectorEventType.FEATURESLOADEND,\n undefined,\n features,\n ),\n );\n };\n\n const failure = () => {\n this.changed();\n this.loading = Number(this.loading) - 1;\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.FEATURESLOADERROR),\n );\n };\n\n //TODO Remove this when the deprecatedsuccess and failure arguments are removed\n let disableCallbacks = false;\n\n const loaded = this.loader_.call(\n this,\n extentToLoad,\n resolution,\n projection,\n (features) => disableCallbacks || success(features),\n () => disableCallbacks || failure(),\n );\n if (loaded instanceof Promise) {\n //TODO Remove this when the deprecatedsuccess and failure arguments are removed\n disableCallbacks = true;\n loaded\n .then((features) => {\n this.addFeatures(features);\n success(features);\n })\n .catch(failure);\n } else if (this.loader_.length < 4) {\n this.loading = false;\n }\n loadedExtentsRtree.insert(extentToLoad, {extent: extentToLoad.slice()});\n }\n }\n }\n\n /**\n * @override\n */\n refresh() {\n this.clear(true);\n this.loadedExtentsRtree_.clear();\n super.refresh();\n }\n\n /**\n * Remove an extent from the list of loaded extents.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @api\n */\n removeLoadedExtent(extent) {\n const loadedExtentsRtree = this.loadedExtentsRtree_;\n const obj = loadedExtentsRtree.forEachInExtent(extent, function (object) {\n if (equals(object.extent, extent)) {\n return object;\n }\n });\n if (obj) {\n loadedExtentsRtree.remove(obj);\n }\n }\n\n /**\n * Batch remove features from the source. If you want to remove all features\n * at once, use the {@link module:ol/source/Vector~VectorSource#clear #clear()} method\n * instead.\n * @param {Array} features Features to remove.\n * @api\n */\n removeFeatures(features) {\n let removed = false;\n for (let i = 0, ii = features.length; i < ii; ++i) {\n removed = this.removeFeatureInternal(features[i]) || removed;\n }\n if (removed) {\n this.changed();\n }\n }\n\n /**\n * Remove a single feature from the source. If you want to batch remove\n * features, use the {@link module:ol/source/Vector~VectorSource#removeFeatures #removeFeatures()} method\n * instead.\n * @param {FeatureType} feature Feature to remove.\n * @api\n */\n removeFeature(feature) {\n if (!feature) {\n return;\n }\n const removed = this.removeFeatureInternal(feature);\n if (removed) {\n this.changed();\n }\n }\n\n /**\n * Remove feature without firing a `change` event.\n * @param {FeatureType} feature Feature.\n * @return {boolean} True if the feature was removed, false if it was not found.\n * @protected\n */\n removeFeatureInternal(feature) {\n const featureKey = getUid(feature);\n if (!(featureKey in this.uidIndex_)) {\n return false;\n }\n\n if (featureKey in this.nullGeometryFeatures_) {\n delete this.nullGeometryFeatures_[featureKey];\n } else {\n if (this.featuresRtree_) {\n this.featuresRtree_.remove(feature);\n }\n }\n\n const featureChangeKeys = this.featureChangeKeys_[featureKey];\n featureChangeKeys?.forEach(unlistenByKey);\n delete this.featureChangeKeys_[featureKey];\n\n const id = feature.getId();\n if (id !== undefined) {\n const idString = id.toString();\n const indexedFeature = this.idIndex_[idString];\n if (indexedFeature === feature) {\n delete this.idIndex_[idString];\n } else if (Array.isArray(indexedFeature)) {\n indexedFeature.splice(indexedFeature.indexOf(feature), 1);\n if (indexedFeature.length === 1) {\n this.idIndex_[idString] = indexedFeature[0];\n }\n }\n }\n delete this.uidIndex_[featureKey];\n if (this.hasListener(VectorEventType.REMOVEFEATURE)) {\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.REMOVEFEATURE, feature),\n );\n }\n return true;\n }\n\n /**\n * Remove a feature from the id index. Called internally when the feature id\n * may have changed.\n * @param {FeatureType} feature The feature.\n * @private\n */\n removeFromIdIndex_(feature) {\n for (const id in this.idIndex_) {\n if (this.idIndex_[id] === feature) {\n delete this.idIndex_[id];\n break;\n }\n }\n }\n\n /**\n * Set the new loader of the source. The next render cycle will use the\n * new loader.\n * @param {import(\"../featureloader.js\").FeatureLoader} loader The loader to set.\n * @api\n */\n setLoader(loader) {\n this.loader_ = loader;\n }\n\n /**\n * Points the source to a new url. The next render cycle will use the new url.\n * @param {string|import(\"../featureloader.js\").FeatureUrlFunction} url Url.\n * @api\n */\n setUrl(url) {\n assert(this.format_, '`format` must be set when `url` is set');\n this.url_ = url;\n this.setLoader(xhr(url, this.format_));\n }\n\n /**\n * @param {boolean} overlaps The source can have overlapping geometries.\n */\n setOverlaps(overlaps) {\n this.overlaps_ = overlaps;\n this.changed();\n }\n}\n\nexport default VectorSource;\n","/**\n * @module ol/style/Fill\n */\n\nimport ImageState from '../ImageState.js';\nimport {asArray} from '../color.js';\nimport {getUid} from '../util.js';\nimport {get as getIconImage} from './IconImage.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|import('../colorlike.js').PatternDescriptor|null} [color=null] A color,\n * gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats. For polygon fills (not for {@link import(\"./RegularShape.js\").default} fills),\n * a pattern can also be provided as {@link module:ol/colorlike~PatternDescriptor}.\n * Default null; if null, the Canvas/renderer default black will be used.\n */\n\n/**\n * @classdesc\n * Set fill style for vector features.\n * @api\n */\nclass Fill {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options || {};\n\n /**\n * @private\n * @type {import(\"./IconImage.js\").default|null}\n */\n this.patternImage_ = null;\n\n /**\n * @private\n * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|import('../colorlike.js').PatternDescriptor|null}\n */\n this.color_ = null;\n if (options.color !== undefined) {\n this.setColor(options.color);\n }\n }\n\n /**\n * Clones the style. The color is not cloned if it is a {@link module:ol/colorlike~ColorLike}.\n * @return {Fill} The cloned style.\n * @api\n */\n clone() {\n const color = this.getColor();\n return new Fill({\n color: Array.isArray(color) ? color.slice() : color || undefined,\n });\n }\n\n /**\n * Get the fill color.\n * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|import('../colorlike.js').PatternDescriptor|null} Color.\n * @api\n */\n getColor() {\n return this.color_;\n }\n\n /**\n * Set the color.\n *\n * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike|import('../colorlike.js').PatternDescriptor|null} color Color.\n * @api\n */\n setColor(color) {\n if (color !== null && typeof color === 'object' && 'src' in color) {\n const patternImage = getIconImage(\n null,\n color.src,\n {crossOrigin: 'anonymous'},\n undefined,\n color.offset ? null : color.color ? color.color : null,\n !(color.offset && color.size),\n );\n patternImage.ready().then(() => {\n this.patternImage_ = null;\n });\n if (patternImage.getImageState() === ImageState.IDLE) {\n patternImage.load();\n }\n if (patternImage.getImageState() === ImageState.LOADING) {\n this.patternImage_ = patternImage;\n }\n }\n this.color_ = color;\n }\n\n /**\n * @return {string} Key of the fill for cache lookup.\n */\n getKey() {\n const fill = this.getColor();\n if (!fill) {\n return '';\n }\n return fill instanceof CanvasPattern || fill instanceof CanvasGradient\n ? getUid(fill)\n : typeof fill === 'object' && 'src' in fill\n ? fill.src + ':' + fill.offset\n : asArray(fill).toString();\n }\n\n /**\n * @return {boolean} The fill style is loading an image pattern.\n */\n loading() {\n return !!this.patternImage_;\n }\n\n /**\n * @return {Promise} `false` or a promise that resolves when the style is ready to use.\n */\n ready() {\n return this.patternImage_ ? this.patternImage_.ready() : Promise.resolve();\n }\n}\n\nexport default Fill;\n","/**\n * @module ol/style/Stroke\n */\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [color] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n * @property {CanvasLineCap} [lineCap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {CanvasLineJoin} [lineJoin='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array} [lineDash] Line dash pattern. Default is `null` (no dash).\n * @property {number} [lineDashOffset=0] Line dash offset.\n * @property {number} [miterLimit=10] Miter limit.\n * @property {number} [offset] Line offset in pixels along the normal. A positive value offsets the line to the right,\n * relative to the direction of the line. Default is `undefined` (no offset).\n * @property {number} [width] Width.\n */\n\n/**\n * @classdesc\n * Set stroke style for vector features.\n * Note that the defaults given are the Canvas defaults, which will be used if\n * option is not defined. The `get` functions return whatever was entered in\n * the options; they will not return the default.\n * @api\n */\nclass Stroke {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options || {};\n\n /**\n * @private\n * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike}\n */\n this.color_ = options.color !== undefined ? options.color : null;\n\n /**\n * @private\n * @type {CanvasLineCap|undefined}\n */\n this.lineCap_ = options.lineCap;\n\n /**\n * @private\n * @type {Array|null}\n */\n this.lineDash_ = options.lineDash !== undefined ? options.lineDash : null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lineDashOffset_ = options.lineDashOffset;\n\n /**\n * @private\n * @type {CanvasLineJoin|undefined}\n */\n this.lineJoin_ = options.lineJoin;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.miterLimit_ = options.miterLimit;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.offset_ = options.offset;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.width_ = options.width;\n }\n\n /**\n * Clones the style.\n * @return {Stroke} The cloned style.\n * @api\n */\n clone() {\n const color = this.getColor();\n return new Stroke({\n color: Array.isArray(color) ? color.slice() : color || undefined,\n lineCap: this.getLineCap(),\n lineDash: this.getLineDash() ? this.getLineDash().slice() : undefined,\n lineDashOffset: this.getLineDashOffset(),\n lineJoin: this.getLineJoin(),\n miterLimit: this.getMiterLimit(),\n offset: this.getOffset(),\n width: this.getWidth(),\n });\n }\n\n /**\n * Get the stroke color.\n * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} Color.\n * @api\n */\n getColor() {\n return this.color_;\n }\n\n /**\n * Get the line cap type for the stroke.\n * @return {CanvasLineCap|undefined} Line cap.\n * @api\n */\n getLineCap() {\n return this.lineCap_;\n }\n\n /**\n * Get the line dash style for the stroke.\n * @return {Array|null} Line dash.\n * @api\n */\n getLineDash() {\n return this.lineDash_;\n }\n\n /**\n * Get the line dash offset for the stroke.\n * @return {number|undefined} Line dash offset.\n * @api\n */\n getLineDashOffset() {\n return this.lineDashOffset_;\n }\n\n /**\n * Get the line join type for the stroke.\n * @return {CanvasLineJoin|undefined} Line join.\n * @api\n */\n getLineJoin() {\n return this.lineJoin_;\n }\n\n /**\n * Get the miter limit for the stroke.\n * @return {number|undefined} Miter limit.\n * @api\n */\n getMiterLimit() {\n return this.miterLimit_;\n }\n\n /**\n * Get the line offset in pixels.\n * @return {number|undefined} Offset.\n * @api\n */\n getOffset() {\n return this.offset_;\n }\n\n /**\n * Get the stroke width.\n * @return {number|undefined} Width.\n * @api\n */\n getWidth() {\n return this.width_;\n }\n\n /**\n * Set the color.\n *\n * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} color Color.\n * @api\n */\n setColor(color) {\n this.color_ = color;\n }\n\n /**\n * Set the line cap.\n *\n * @param {CanvasLineCap|undefined} lineCap Line cap.\n * @api\n */\n setLineCap(lineCap) {\n this.lineCap_ = lineCap;\n }\n\n /**\n * Set the line dash.\n *\n * @param {Array|null} lineDash Line dash.\n * @api\n */\n setLineDash(lineDash) {\n this.lineDash_ = lineDash;\n }\n\n /**\n * Set the line dash offset.\n *\n * @param {number|undefined} lineDashOffset Line dash offset.\n * @api\n */\n setLineDashOffset(lineDashOffset) {\n this.lineDashOffset_ = lineDashOffset;\n }\n\n /**\n * Set the line join.\n *\n * @param {CanvasLineJoin|undefined} lineJoin Line join.\n * @api\n */\n setLineJoin(lineJoin) {\n this.lineJoin_ = lineJoin;\n }\n\n /**\n * Set the miter limit.\n *\n * @param {number|undefined} miterLimit Miter limit.\n * @api\n */\n setMiterLimit(miterLimit) {\n this.miterLimit_ = miterLimit;\n }\n\n /**\n * Set the line offset in pixels.\n *\n * @param {number|undefined} offset Offset.\n * @api\n */\n setOffset(offset) {\n this.offset_ = offset;\n }\n\n /**\n * Set the width.\n *\n * @param {number|undefined} width Width.\n * @api\n */\n setWidth(width) {\n this.width_ = width;\n }\n}\n\nexport default Stroke;\n","/**\n * @module ol/size\n */\n\n/**\n * An array of numbers representing a size: `[width, height]`.\n * @typedef {Array} Size\n * @api\n */\n\n/**\n * Returns a buffered size.\n * @param {Size} size Size.\n * @param {number} num The amount by which to buffer.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} The buffered size.\n */\nexport function buffer(size, num, dest) {\n if (dest === undefined) {\n dest = [0, 0];\n }\n dest[0] = size[0] + 2 * num;\n dest[1] = size[1] + 2 * num;\n return dest;\n}\n\n/**\n * Determines if a size has a positive area.\n * @param {Size} size The size to test.\n * @return {boolean} The size has a positive area.\n */\nexport function hasArea(size) {\n return size[0] > 0 && size[1] > 0;\n}\n\n/**\n * Returns a size scaled by a ratio. The result will be an array of integers.\n * @param {Size} size Size.\n * @param {number} ratio Ratio.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} The scaled size.\n */\nexport function scale(size, ratio, dest) {\n if (dest === undefined) {\n dest = [0, 0];\n }\n dest[0] = (size[0] * ratio + 0.5) | 0;\n dest[1] = (size[1] * ratio + 0.5) | 0;\n return dest;\n}\n\n/**\n * Returns an `Size` array for the passed in number (meaning: square) or\n * `Size` array.\n * (meaning: non-square),\n * @param {number|Size} size Width and height.\n * @param {Size} [dest] Optional reusable size array.\n * @return {Size} Size.\n * @api\n */\nexport function toSize(size, dest) {\n if (Array.isArray(size)) {\n return size;\n }\n if (dest === undefined) {\n dest = [size, size];\n } else {\n dest[0] = size;\n dest[1] = size;\n }\n return dest;\n}\n","/**\n * @module ol/style/Image\n */\nimport {toSize} from '../size.js';\nimport {abstract} from '../util.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} opacity Opacity.\n * @property {boolean} rotateWithView If the image should get rotated with the view.\n * @property {number} rotation Rotation.\n * @property {number|import(\"../size.js\").Size} scale Scale.\n * @property {Array} displacement Displacement.\n * @property {import('../style/Style.js').DeclutterMode} declutterMode Declutter mode: `declutter`, `obstacle`, `none`.\n */\n\n/**\n * @classdesc\n * A base class used for creating subclasses and not instantiated in\n * apps. Base class for {@link module:ol/style/Icon~Icon}, {@link module:ol/style/Circle~CircleStyle} and\n * {@link module:ol/style/RegularShape~RegularShape}.\n * @abstract\n * @api\n */\nclass ImageStyle {\n /**\n * @param {Options} options Options.\n */\n constructor(options) {\n /**\n * @private\n * @type {number}\n */\n this.opacity_ = options.opacity;\n\n /**\n * @private\n * @type {boolean}\n */\n this.rotateWithView_ = options.rotateWithView;\n\n /**\n * @private\n * @type {number}\n */\n this.rotation_ = options.rotation;\n\n /**\n * @private\n * @type {number|import(\"../size.js\").Size}\n */\n this.scale_ = options.scale;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size}\n */\n this.scaleArray_ = toSize(options.scale);\n\n /**\n * @private\n * @type {Array}\n */\n this.displacement_ = options.displacement;\n\n /**\n * @private\n * @type {import('../style/Style.js').DeclutterMode}\n */\n this.declutterMode_ = options.declutterMode;\n }\n\n /**\n * Clones the style.\n * @return {ImageStyle} The cloned style.\n * @api\n */\n clone() {\n const scale = this.getScale();\n return new ImageStyle({\n opacity: this.getOpacity(),\n scale: Array.isArray(scale) ? scale.slice() : scale,\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView(),\n displacement: this.getDisplacement().slice(),\n declutterMode: this.getDeclutterMode(),\n });\n }\n\n /**\n * Get the symbolizer opacity.\n * @return {number} Opacity.\n * @api\n */\n getOpacity() {\n return this.opacity_;\n }\n\n /**\n * Determine whether the symbolizer rotates with the map.\n * @return {boolean} Rotate with map.\n * @api\n */\n getRotateWithView() {\n return this.rotateWithView_;\n }\n\n /**\n * Get the symoblizer rotation.\n * @return {number} Rotation.\n * @api\n */\n getRotation() {\n return this.rotation_;\n }\n\n /**\n * Get the symbolizer scale.\n * @return {number|import(\"../size.js\").Size} Scale.\n * @api\n */\n getScale() {\n return this.scale_;\n }\n\n /**\n * Get the symbolizer scale array.\n * @return {import(\"../size.js\").Size} Scale array.\n */\n getScaleArray() {\n return this.scaleArray_;\n }\n\n /**\n * Get the displacement of the shape\n * @return {Array} Shape's center displacement\n * @api\n */\n getDisplacement() {\n return this.displacement_;\n }\n\n /**\n * Get the declutter mode of the shape\n * @return {import(\"./Style.js\").DeclutterMode} Shape's declutter mode\n * @api\n */\n getDeclutterMode() {\n return this.declutterMode_;\n }\n\n /**\n * Get the anchor point in pixels. The anchor determines the center point for the\n * symbolizer.\n * @abstract\n * @return {Array} Anchor.\n */\n getAnchor() {\n return abstract();\n }\n\n /**\n * Get the image element for the symbolizer.\n * @abstract\n * @param {number} pixelRatio Pixel ratio.\n * @return {import('../DataTile.js').ImageLike} Image element.\n */\n getImage(pixelRatio) {\n return abstract();\n }\n\n /**\n * @abstract\n * @return {import('../DataTile.js').ImageLike} Image element.\n */\n getHitDetectionImage() {\n return abstract();\n }\n\n /**\n * Get the image pixel ratio.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel ratio.\n */\n getPixelRatio(pixelRatio) {\n return 1;\n }\n\n /**\n * @abstract\n * @return {import(\"../ImageState.js\").default} Image state.\n */\n getImageState() {\n return abstract();\n }\n\n /**\n * @abstract\n * @return {import(\"../size.js\").Size} Image size.\n */\n getImageSize() {\n return abstract();\n }\n\n /**\n * Get the origin of the symbolizer.\n * @abstract\n * @return {Array} Origin.\n */\n getOrigin() {\n return abstract();\n }\n\n /**\n * Get the size of the symbolizer (in pixels).\n * @abstract\n * @return {import(\"../size.js\").Size} Size.\n */\n getSize() {\n return abstract();\n }\n\n /**\n * Set the displacement.\n *\n * @param {Array} displacement Displacement.\n * @api\n */\n setDisplacement(displacement) {\n this.displacement_ = displacement;\n }\n\n /**\n * Set the opacity.\n *\n * @param {number} opacity Opacity.\n * @api\n */\n setOpacity(opacity) {\n this.opacity_ = opacity;\n }\n\n /**\n * Set whether to rotate the style with the view.\n *\n * @param {boolean} rotateWithView Rotate with map.\n * @api\n */\n setRotateWithView(rotateWithView) {\n this.rotateWithView_ = rotateWithView;\n }\n\n /**\n * Set the rotation.\n *\n * @param {number} rotation Rotation.\n * @api\n */\n setRotation(rotation) {\n this.rotation_ = rotation;\n }\n\n /**\n * Set the scale.\n *\n * @param {number|import(\"../size.js\").Size} scale Scale.\n * @api\n */\n setScale(scale) {\n this.scale_ = scale;\n this.scaleArray_ = toSize(scale);\n }\n\n /**\n * @abstract\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n */\n listenImageChange(listener) {\n abstract();\n }\n\n /**\n * Load not yet loaded URI.\n * @abstract\n */\n load() {\n abstract();\n }\n\n /**\n * @abstract\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n */\n unlistenImageChange(listener) {\n abstract();\n }\n\n /**\n * @return {Promise} `false` or Promise that resolves when the style is ready to use.\n */\n ready() {\n return Promise.resolve();\n }\n}\n\nexport default ImageStyle;\n","/**\n * @module ol/style/RegularShape\n */\n\nimport ImageState from '../ImageState.js';\nimport {asArray} from '../color.js';\nimport {asColorLike} from '../colorlike.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {\n defaultFillStyle,\n defaultLineCap,\n defaultLineJoin,\n defaultLineWidth,\n defaultMiterLimit,\n defaultStrokeStyle,\n} from '../render/canvas.js';\nimport IconImage from './IconImage.js';\nimport {shared as iconImageCache} from './IconImageCache.js';\nimport ImageStyle from './Image.js';\n\n/**\n * Specify radius for regular polygons, or both radius and radius2 for stars.\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} points Number of points for stars and regular polygons. In case of a polygon, the number of points\n * is the number of sides.\n * @property {number} radius Radius of a regular polygon.\n * @property {number} [radius2] Second radius to make a star instead of a regular polygon.\n * @property {number} [angle=0] Shape's angle in radians. A value of 0 will have one of the shape's points facing up.\n * @property {Array} [displacement=[0, 0]] Displacement of the shape in pixels.\n * Positive values will shift the shape right and up.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view.\n * @property {number|import(\"../size.js\").Size} [scale=1] Scale. Unless two dimensional scaling is required a better\n * result may be obtained with appropriate settings for `radius` and `radius2`.\n * @property {import('./Style.js').DeclutterMode} [declutterMode] Declutter mode.\n */\n\n/**\n * @typedef {Object} RenderOptions\n * @property {import(\"../colorlike.js\").ColorLike|undefined} strokeStyle StrokeStyle.\n * @property {number} strokeWidth StrokeWidth.\n * @property {number} size Size.\n * @property {CanvasLineCap} lineCap LineCap.\n * @property {Array|null} lineDash LineDash.\n * @property {number} lineDashOffset LineDashOffset.\n * @property {CanvasLineJoin} lineJoin LineJoin.\n * @property {number} miterLimit MiterLimit.\n */\n\n/**\n * @classdesc\n * Set regular shape style for vector features. The resulting shape will be\n * a regular polygon when `radius` is provided, or a star when both `radius` and\n * `radius2` are provided.\n * @api\n */\nclass RegularShape extends ImageStyle {\n /**\n * @param {Options} options Options.\n */\n constructor(options) {\n super({\n opacity: 1,\n rotateWithView:\n options.rotateWithView !== undefined ? options.rotateWithView : false,\n rotation: options.rotation !== undefined ? options.rotation : 0,\n scale: options.scale !== undefined ? options.scale : 1,\n displacement:\n options.displacement !== undefined ? options.displacement : [0, 0],\n declutterMode: options.declutterMode,\n });\n\n /**\n * @private\n * @type {HTMLCanvasElement|OffscreenCanvas|null}\n */\n this.hitDetectionCanvas_ = null;\n\n /**\n * @private\n * @type {import(\"./Fill.js\").default|null}\n */\n this.fill_ = options.fill !== undefined ? options.fill : null;\n\n /**\n * @private\n * @type {Array}\n */\n this.origin_ = [0, 0];\n\n /**\n * @private\n * @type {number}\n */\n this.points_ = options.points;\n\n /**\n * @protected\n * @type {number}\n */\n this.radius = options.radius;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.radius2_ = options.radius2;\n\n /**\n * @private\n * @type {number}\n */\n this.angle_ = options.angle !== undefined ? options.angle : 0;\n\n /**\n * @private\n * @type {import(\"./Stroke.js\").default|null}\n */\n this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n /**\n * @private\n * @type {import(\"../size.js\").Size}\n */\n this.size_;\n\n /**\n * @private\n * @type {RenderOptions}\n */\n this.renderOptions_;\n\n /**\n * @private\n */\n this.imageState_ =\n this.fill_ && this.fill_.loading()\n ? ImageState.LOADING\n : ImageState.LOADED;\n if (this.imageState_ === ImageState.LOADING) {\n this.ready().then(() => (this.imageState_ = ImageState.LOADED));\n }\n this.render();\n }\n\n /**\n * Clones the style.\n * @return {RegularShape} The cloned style.\n * @api\n * @override\n */\n clone() {\n const scale = this.getScale();\n const style = new RegularShape({\n fill: this.getFill() ? this.getFill().clone() : undefined,\n points: this.getPoints(),\n radius: this.getRadius(),\n radius2: this.getRadius2(),\n angle: this.getAngle(),\n stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView(),\n scale: Array.isArray(scale) ? scale.slice() : scale,\n displacement: this.getDisplacement().slice(),\n declutterMode: this.getDeclutterMode(),\n });\n style.setOpacity(this.getOpacity());\n return style;\n }\n\n /**\n * Get the anchor point in pixels. The anchor determines the center point for the\n * symbolizer.\n * @return {Array} Anchor.\n * @api\n * @override\n */\n getAnchor() {\n const size = this.size_;\n const displacement = this.getDisplacement();\n const scale = this.getScaleArray();\n // anchor is scaled by renderer but displacement should not be scaled\n // so divide by scale here\n return [\n size[0] / 2 - displacement[0] / scale[0],\n size[1] / 2 + displacement[1] / scale[1],\n ];\n }\n\n /**\n * Get the angle used in generating the shape.\n * @return {number} Shape's rotation in radians.\n * @api\n */\n getAngle() {\n return this.angle_;\n }\n\n /**\n * Get the fill style for the shape.\n * @return {import(\"./Fill.js\").default|null} Fill style.\n * @api\n */\n getFill() {\n return this.fill_;\n }\n\n /**\n * Set the fill style.\n * @param {import(\"./Fill.js\").default|null} fill Fill style.\n * @api\n */\n setFill(fill) {\n this.fill_ = fill;\n this.render();\n }\n\n /**\n * @return {HTMLCanvasElement|OffscreenCanvas} Image element.\n * @override\n */\n getHitDetectionImage() {\n if (!this.hitDetectionCanvas_) {\n this.hitDetectionCanvas_ = this.createHitDetectionCanvas_(\n this.renderOptions_,\n );\n }\n return this.hitDetectionCanvas_;\n }\n\n /**\n * Get the image icon.\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLCanvasElement|OffscreenCanvas} Image or Canvas element.\n * @api\n * @override\n */\n getImage(pixelRatio) {\n const fillKey = this.fill_?.getKey();\n const cacheKey =\n `${pixelRatio},${this.angle_},${this.radius},${this.radius2_},${this.points_},${fillKey}` +\n Object.values(this.renderOptions_).join(',');\n let image = /** @type {HTMLCanvasElement|OffscreenCanvas} */ (\n iconImageCache.get(cacheKey, null)?.getImage(1)\n );\n if (!image) {\n const renderOptions = this.renderOptions_;\n const size = Math.ceil(renderOptions.size * pixelRatio);\n const context = createCanvasContext2D(size, size);\n this.draw_(renderOptions, context, pixelRatio);\n\n image = context.canvas;\n const iconImage = new IconImage(\n image,\n undefined,\n null,\n ImageState.LOADED,\n null,\n );\n iconImageCache.set(cacheKey, null, iconImage);\n // Update the image in place to an ImageBitmap for better performance and lower memory usage\n createImageBitmap(image).then((imageBitmap) => {\n iconImage.setImage(imageBitmap);\n });\n }\n return image;\n }\n\n /**\n * Get the image pixel ratio.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel ratio.\n * @override\n */\n getPixelRatio(pixelRatio) {\n return pixelRatio;\n }\n\n /**\n * @return {import(\"../size.js\").Size} Image size.\n * @override\n */\n getImageSize() {\n return this.size_;\n }\n\n /**\n * @return {import(\"../ImageState.js\").default} Image state.\n * @override\n */\n getImageState() {\n return this.imageState_;\n }\n\n /**\n * Get the origin of the symbolizer.\n * @return {Array} Origin.\n * @api\n * @override\n */\n getOrigin() {\n return this.origin_;\n }\n\n /**\n * Get the number of points for generating the shape.\n * @return {number} Number of points for stars and regular polygons.\n * @api\n */\n getPoints() {\n return this.points_;\n }\n\n /**\n * Get the (primary) radius for the shape.\n * @return {number} Radius.\n * @api\n */\n getRadius() {\n return this.radius;\n }\n\n /**\n * Set the (primary) radius for the shape.\n * @param {number} radius Radius.\n * @api\n */\n setRadius(radius) {\n if (this.radius === radius) {\n return;\n }\n this.radius = radius;\n this.render();\n }\n\n /**\n * Get the secondary radius for the shape.\n * @return {number|undefined} Radius2.\n * @api\n */\n getRadius2() {\n return this.radius2_;\n }\n\n /**\n * Set the secondary radius for the shape.\n * @param {number|undefined} radius2 Radius2.\n * @api\n */\n setRadius2(radius2) {\n if (this.radius2_ === radius2) {\n return;\n }\n this.radius2_ = radius2;\n this.render();\n }\n\n /**\n * Get the size of the symbolizer (in pixels).\n * @return {import(\"../size.js\").Size} Size.\n * @api\n * @override\n */\n getSize() {\n return this.size_;\n }\n\n /**\n * Get the stroke style for the shape.\n * @return {import(\"./Stroke.js\").default|null} Stroke style.\n * @api\n */\n getStroke() {\n return this.stroke_;\n }\n\n /**\n * Set the stroke style.\n * @param {import(\"./Stroke.js\").default|null} stroke Stroke style.\n * @api\n */\n setStroke(stroke) {\n this.stroke_ = stroke;\n this.render();\n }\n\n /**\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n * @override\n */\n listenImageChange(listener) {}\n\n /**\n * Load not yet loaded URI.\n * @override\n */\n load() {}\n\n /**\n * @param {function(import(\"../events/Event.js\").default): void} listener Listener function.\n * @override\n */\n unlistenImageChange(listener) {}\n\n /**\n * Calculate additional canvas size needed for the miter.\n * @param {string} lineJoin Line join\n * @param {number} strokeWidth Stroke width\n * @param {number} miterLimit Miter limit\n * @return {number} Additional canvas size needed\n * @private\n */\n calculateLineJoinSize_(lineJoin, strokeWidth, miterLimit) {\n if (\n strokeWidth === 0 ||\n this.points_ === Infinity ||\n (lineJoin !== 'bevel' && lineJoin !== 'miter')\n ) {\n return strokeWidth;\n }\n // m | ^\n // i | |\\ .\n // t >| #\\\n // e | |\\ \\ .\n // r \\s\\\n // | \\t\\ . .\n // \\r\\ . .\n // | \\o\\ . . . . .\n // e \\k\\ . . . .\n // | \\e\\ . . . . .\n // d \\ \\ . . . .\n // | _ _a_ _\\# . . .\n // r1 / ` . .\n // | . .\n // b / . .\n // | . .\n // / r2 . .\n // | . .\n // / . .\n // |α . .\n // / . .\n // ° center\n let r1 = this.radius;\n let r2 = this.radius2_ === undefined ? r1 : this.radius2_;\n if (r1 < r2) {\n const tmp = r1;\n r1 = r2;\n r2 = tmp;\n }\n const points =\n this.radius2_ === undefined ? this.points_ : this.points_ * 2;\n const alpha = (2 * Math.PI) / points;\n const a = r2 * Math.sin(alpha);\n const b = Math.sqrt(r2 * r2 - a * a);\n const d = r1 - b;\n const e = Math.sqrt(a * a + d * d);\n const miterRatio = e / a;\n if (lineJoin === 'miter' && miterRatio <= miterLimit) {\n return miterRatio * strokeWidth;\n }\n // Calculate the distance from center to the stroke corner where\n // it was cut short because of the miter limit.\n // l\n // ----+---- <= distance from center to here is maxr\n // /####|k ##\\\n // /#####^#####\\\n // /#### /+\\# s #\\\n // /### h/+++\\# t #\\\n // /### t/+++++\\# r #\\\n // /### a/+++++++\\# o #\\\n // /### p/++ fill +\\# k #\\\n ///#### /+++++^+++++\\# e #\\\n //#####/+++++/+\\+++++\\#####\\\n const k = strokeWidth / 2 / miterRatio;\n const l = (strokeWidth / 2) * (d / e);\n const maxr = Math.sqrt((r1 + k) * (r1 + k) + l * l);\n const bevelAdd = maxr - r1;\n if (this.radius2_ === undefined || lineJoin === 'bevel') {\n return bevelAdd * 2;\n }\n // If outer miter is over the miter limit the inner miter may reach through the\n // center and be longer than the bevel, same calculation as above but swap r1 / r2.\n const aa = r1 * Math.sin(alpha);\n const bb = Math.sqrt(r1 * r1 - aa * aa);\n const dd = r2 - bb;\n const ee = Math.sqrt(aa * aa + dd * dd);\n const innerMiterRatio = ee / aa;\n if (innerMiterRatio <= miterLimit) {\n const innerLength = (innerMiterRatio * strokeWidth) / 2 - r2 - r1;\n return 2 * Math.max(bevelAdd, innerLength);\n }\n return bevelAdd * 2;\n }\n\n /**\n * @return {RenderOptions} The render options\n * @protected\n */\n createRenderOptions() {\n let lineCap = defaultLineCap;\n let lineJoin = defaultLineJoin;\n let miterLimit = 0;\n let lineDash = null;\n let lineDashOffset = 0;\n let strokeStyle;\n let strokeWidth = 0;\n\n if (this.stroke_) {\n strokeStyle = asColorLike(this.stroke_.getColor() ?? defaultStrokeStyle);\n strokeWidth = this.stroke_.getWidth() ?? defaultLineWidth;\n lineDash = this.stroke_.getLineDash();\n lineDashOffset = this.stroke_.getLineDashOffset() ?? 0;\n lineJoin = this.stroke_.getLineJoin() ?? defaultLineJoin;\n lineCap = this.stroke_.getLineCap() ?? defaultLineCap;\n miterLimit = this.stroke_.getMiterLimit() ?? defaultMiterLimit;\n }\n\n const add = this.calculateLineJoinSize_(lineJoin, strokeWidth, miterLimit);\n const maxRadius = Math.max(this.radius, this.radius2_ || 0);\n const size = Math.ceil(2 * maxRadius + add);\n\n return {\n strokeStyle: strokeStyle,\n strokeWidth: strokeWidth,\n size: size,\n lineCap: lineCap,\n lineDash: lineDash,\n lineDashOffset: lineDashOffset,\n lineJoin: lineJoin,\n miterLimit: miterLimit,\n };\n }\n\n /**\n * @protected\n */\n render() {\n this.renderOptions_ = this.createRenderOptions();\n const size = this.renderOptions_.size;\n this.hitDetectionCanvas_ = null;\n this.size_ = [size, size];\n }\n\n /**\n * @private\n * @param {RenderOptions} renderOptions Render options.\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context The rendering context.\n * @param {number} pixelRatio The pixel ratio.\n */\n draw_(renderOptions, context, pixelRatio) {\n context.scale(pixelRatio, pixelRatio);\n // set origin to canvas center\n context.translate(renderOptions.size / 2, renderOptions.size / 2);\n\n this.createPath_(context);\n\n if (this.fill_) {\n let color = this.fill_.getColor();\n if (color === null) {\n color = defaultFillStyle;\n }\n context.fillStyle = asColorLike(color);\n context.fill();\n }\n if (renderOptions.strokeStyle) {\n context.strokeStyle = renderOptions.strokeStyle;\n context.lineWidth = renderOptions.strokeWidth;\n if (renderOptions.lineDash) {\n context.setLineDash(renderOptions.lineDash);\n context.lineDashOffset = renderOptions.lineDashOffset;\n }\n context.lineCap = renderOptions.lineCap;\n context.lineJoin = renderOptions.lineJoin;\n context.miterLimit = renderOptions.miterLimit;\n context.stroke();\n }\n }\n\n /**\n * @private\n * @param {RenderOptions} renderOptions Render options.\n * @return {HTMLCanvasElement|OffscreenCanvas} Canvas containing the icon\n */\n createHitDetectionCanvas_(renderOptions) {\n let context;\n if (this.fill_) {\n let color = this.fill_.getColor();\n\n // determine if fill is transparent (or pattern or gradient)\n let opacity = 0;\n if (typeof color === 'string') {\n color = asArray(color);\n }\n if (color === null) {\n opacity = 1;\n } else if (Array.isArray(color)) {\n opacity = color.length === 4 ? color[3] : 1;\n }\n if (opacity === 0) {\n // if a transparent fill style is set, create an extra hit-detection image\n // with a default fill style\n context = createCanvasContext2D(renderOptions.size, renderOptions.size);\n this.drawHitDetectionCanvas_(renderOptions, context);\n }\n }\n return context ? context.canvas : this.getImage(1);\n }\n\n /**\n * @private\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context The context to draw in.\n */\n createPath_(context) {\n let points = this.points_;\n const radius = this.radius;\n if (points === Infinity) {\n context.arc(0, 0, radius, 0, 2 * Math.PI);\n } else {\n const radius2 = this.radius2_ === undefined ? radius : this.radius2_;\n if (this.radius2_ !== undefined) {\n points *= 2;\n }\n const startAngle = this.angle_ - Math.PI / 2;\n const step = (2 * Math.PI) / points;\n for (let i = 0; i < points; i++) {\n const angle0 = startAngle + i * step;\n const radiusC = i % 2 === 0 ? radius : radius2;\n context.lineTo(radiusC * Math.cos(angle0), radiusC * Math.sin(angle0));\n }\n context.closePath();\n }\n }\n\n /**\n * @private\n * @param {RenderOptions} renderOptions Render options.\n * @param {CanvasRenderingContext2D|OffscreenCanvasRenderingContext2D} context The context.\n */\n drawHitDetectionCanvas_(renderOptions, context) {\n // set origin to canvas center\n context.translate(renderOptions.size / 2, renderOptions.size / 2);\n\n this.createPath_(context);\n\n context.fillStyle = defaultFillStyle;\n context.fill();\n if (renderOptions.strokeStyle) {\n context.strokeStyle = renderOptions.strokeStyle;\n context.lineWidth = renderOptions.strokeWidth;\n if (renderOptions.lineDash) {\n context.setLineDash(renderOptions.lineDash);\n context.lineDashOffset = renderOptions.lineDashOffset;\n }\n context.lineJoin = renderOptions.lineJoin;\n context.miterLimit = renderOptions.miterLimit;\n context.stroke();\n }\n }\n\n /**\n * @override\n */\n ready() {\n return this.fill_ ? this.fill_.ready() : Promise.resolve();\n }\n}\n\nexport default RegularShape;\n","/**\n * @module ol/style/Circle\n */\n\nimport RegularShape from './RegularShape.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} radius Circle radius.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {Array} [displacement=[0,0]] displacement\n * @property {number|import(\"../size.js\").Size} [scale=1] Scale. A two dimensional scale will produce an ellipse.\n * Unless two dimensional scaling is required a better result may be obtained with an appropriate setting for `radius`.\n * @property {number} [rotation=0] Rotation in radians\n * (positive rotation clockwise, meaningful only when used in conjunction with a two dimensional scale).\n * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view\n * (meaningful only when used in conjunction with a two dimensional scale).\n * @property {import('./Style.js').DeclutterMode} [declutterMode] Declutter mode\n */\n\n/**\n * @classdesc\n * Set circle style for vector features.\n * @api\n */\nclass CircleStyle extends RegularShape {\n /**\n * @param {Options} [options] Options.\n */\n constructor(options) {\n options = options ? options : {radius: 5};\n\n super({\n points: Infinity,\n fill: options.fill,\n radius: options.radius,\n stroke: options.stroke,\n scale: options.scale !== undefined ? options.scale : 1,\n rotation: options.rotation !== undefined ? options.rotation : 0,\n rotateWithView:\n options.rotateWithView !== undefined ? options.rotateWithView : false,\n displacement:\n options.displacement !== undefined ? options.displacement : [0, 0],\n declutterMode: options.declutterMode,\n });\n }\n\n /**\n * Clones the style.\n * @return {CircleStyle} The cloned style.\n * @api\n * @override\n */\n clone() {\n const scale = this.getScale();\n const style = new CircleStyle({\n fill: this.getFill() ? this.getFill().clone() : undefined,\n stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n radius: this.getRadius(),\n scale: Array.isArray(scale) ? scale.slice() : scale,\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView(),\n displacement: this.getDisplacement().slice(),\n declutterMode: this.getDeclutterMode(),\n });\n style.setOpacity(this.getOpacity());\n return style;\n }\n}\n\nexport default CircleStyle;\n","/**\n * @module ol/style/Style\n */\n\nimport {assert} from '../asserts.js';\nimport CircleStyle from './Circle.js';\nimport Fill from './Fill.js';\nimport Stroke from './Stroke.js';\n\n/**\n * Defines how symbols and text are decluttered on layers ith `declutter` set to `true`\n * **declutter**: Overlapping symbols and text are decluttered.\n * **obstacle**: Symbols and text are rendered, but serve as obstacle for subsequent attempts\n * to place a symbol or text at the same location.\n * **none**: No decluttering is done.\n *\n * @typedef {\"declutter\"|\"obstacle\"|\"none\"} DeclutterMode\n */\n\n/**\n * A function that takes a {@link module:ol/Feature~Feature} and a `{number}`\n * representing the view's resolution. The function should return a\n * {@link module:ol/style/Style~Style} or an array of them. This way e.g. a\n * vector layer can be styled. If the function returns `undefined`, the\n * feature will not be rendered.\n *\n * @typedef {function(import(\"../Feature.js\").FeatureLike, number):(Style|Array