maplair/dist/esm/layer/LayerGroup.js

JavaScript library for mobile-friendly interactive maps

import { setOptions, stamp } from "../core/Util.js";
import { Layer } from "./Layer.js";
//#region src/layer/LayerGroup.js
var LayerGroup = class LayerGroup extends Layer {
	constructor(layers, options) {
		super();
		setOptions(this, options);
		this._layers = {};
		for (const layer of layers ?? []) this.addLayer(layer);
		this.callInitHooks(LayerGroup);
	}
	addLayer(layer) {
		const id = this.getLayerId(layer);
		this._layers[id] = layer;
		this._map?.addLayer(layer);
		return this;
	}
	removeLayer(layer) {
		const id = layer in this._layers ? layer : this.getLayerId(layer);
		if (this._map && this._layers[id]) this._map.removeLayer(this._layers[id]);
		delete this._layers[id];
		return this;
	}
	hasLayer(layer) {
		return (typeof layer === "number" ? layer : this.getLayerId(layer)) in this._layers;
	}
	clearLayers() {
		return this.eachLayer(this.removeLayer, this);
	}
	onAdd(map) {
		this.eachLayer(map.addLayer, map);
	}
	onRemove(map) {
		this.eachLayer(map.removeLayer, map);
	}
	eachLayer(method, context) {
		for (const layer of Object.values(this._layers)) method.call(context, layer);
		return this;
	}
	getLayer(id) {
		return this._layers[id];
	}
	getLayers() {
		const layers = [];
		this.eachLayer(layers.push, layers);
		return layers;
	}
	setZIndex(zIndex) {
		return this.eachLayer((l) => l.setZIndex?.(zIndex));
	}
	getLayerId(layer) {
		return stamp(layer);
	}
};
//#endregion
export { LayerGroup };

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