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62 lines
2.1 KiB
TypeScript
62 lines
2.1 KiB
TypeScript
import { TileLayer } from 'leaflet';
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import { registerWithParent, buildOptions, parseAttributeValue } from '../core/utils.js';
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import { withProps } from '../core/with-props.js';
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import {
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createChildRegisterHandler,
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type ChildEntry,
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LeafletRegisterEvent,
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} from '../core/register.js';
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import type { PropDef } from '../types/props.js';
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const PROPS = {
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url: { kind: 'str', attr: 'url', default: '' },
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attribution: { kind: 'str', attr: 'attribution', default: '' },
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minZoom: { kind: 'num', attr: 'min-zoom', default: 0 },
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maxZoom: { kind: 'num', attr: 'max-zoom', default: 18 },
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opacity: { kind: 'num', attr: 'opacity', default: 1.0 },
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zIndex: { kind: 'num', attr: 'z-index', default: 0 },
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} satisfies Record<string, PropDef>;
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const PROP_BY_ATTR = new Map<string, string>(
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Object.entries(PROPS).map(([name, spec]) => [spec.attr, name]),
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);
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export class LeafletTileLayer extends withProps(HTMLElement, PROPS) {
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#obj?: TileLayer;
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#children = new Map<HTMLElement, ChildEntry>();
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#childHandler?: (e: LeafletRegisterEvent) => void;
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connectedCallback() {
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const url = this.getAttribute('url') || '';
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this.#obj = new TileLayer(url, buildOptions(this, PROPS, ['url']));
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this.#childHandler = createChildRegisterHandler(this.#obj, this.#children);
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this.addEventListener('leaflet-register', this.#childHandler);
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registerWithParent(this, this.#obj);
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}
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disconnectedCallback() {
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if (this.#childHandler) this.removeEventListener('leaflet-register', this.#childHandler);
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this.#children.clear();
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this.#obj?.remove();
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this.#obj = undefined;
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}
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attributeChangedCallback(name: string, _old: string | null, val: string | null) {
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if (!this.#obj) return;
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if (name === 'url') {
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if (val) this.#obj.setUrl(val);
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} else {
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const propName = PROP_BY_ATTR.get(name);
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if (!propName) return;
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const setter =
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`set${propName.charAt(0).toUpperCase()}${propName.slice(1)}` as keyof TileLayer;
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if (typeof this.#obj[setter] === 'function') {
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(this.#obj[setter] as (v: unknown) => void)(parseAttributeValue(val));
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}
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}
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}
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}
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customElements.define('leaflet-tile-layer', LeafletTileLayer);
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