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53 lines
2.0 KiB
TypeScript
53 lines
2.0 KiB
TypeScript
import { Polygon, type PolylineOptions } from 'leaflet';
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import { pathProps } from '../core/shared-props.ts';
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import {
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WithProps,
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type LeafletAddEventListener,
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type LeafletElementConstructor,
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type LeafletRemoveEventListener,
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} from '../core/with-props.ts';
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import type { PathEvents } from '../core/event-types.ts';
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import type { LeafletLineRemoveEvent, LeafletLineSyncEvent } from '../core/register.ts';
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import { VertexTracker } from '../core/vertex-tracker.ts';
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const PROPS = { ...pathProps } as const;
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const Base: LeafletElementConstructor<Polygon, typeof PROPS> = WithProps(PROPS);
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/** `<leaflet-polygon>` — a Leaflet `Polygon`. Vertices come from `<leaflet-line>` children, not an attribute. */
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export default class LeafletPolygonElement extends Base {
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declare readonly leafletObject?: Polygon;
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declare addEventListener: LeafletAddEventListener<PathEvents>;
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declare removeEventListener: LeafletRemoveEventListener<PathEvents>;
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#vertices = new VertexTracker();
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createLeafletObject(options: PolylineOptions): Polygon {
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return new Polygon(this.#vertices.coords(), options);
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}
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// Vertices come from <leaflet-line> children rather than an attribute --
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// each one announces its own position via leaflet-line-sync/-remove, we
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// never read a child's state directly.
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connectedCallback(): void {
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super.connectedCallback();
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this.addEventListener('leaflet-line-sync', this.#onLineSync);
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this.addEventListener('leaflet-line-remove', this.#onLineRemove);
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}
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disconnectedCallback(): void {
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this.removeEventListener('leaflet-line-sync', this.#onLineSync);
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this.removeEventListener('leaflet-line-remove', this.#onLineRemove);
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super.disconnectedCallback();
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}
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#onLineSync = (e: LeafletLineSyncEvent) => {
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this.#vertices.sync(e.detail.element, e.detail.latlng);
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this.leafletObject?.setLatLngs(this.#vertices.coords());
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};
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#onLineRemove = (e: LeafletLineRemoveEvent) => {
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this.#vertices.remove(e.detail.element);
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this.leafletObject?.setLatLngs(this.#vertices.coords());
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};
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}
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