45 lines
1.3 KiB
TypeScript
45 lines
1.3 KiB
TypeScript
import {ITiledMap, ITiledMapLayer} from "./ITiledMap";
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/**
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* Iterates over the layers of a map, flattening the grouped layers
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*/
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export class LayersIterator implements IterableIterator<ITiledMapLayer> {
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private layers: ITiledMapLayer[] = [];
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private pointer: number = 0;
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constructor(private map: ITiledMap) {
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this.initLayersList(map.layers, '');
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}
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private initLayersList(layers : ITiledMapLayer[], prefix : string) {
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for (const layer of layers) {
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if (layer.type === 'group') {
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this.initLayersList(layer.layers, prefix + layer.name + '/');
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} else {
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const layerWithNewName = { ...layer };
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layerWithNewName.name = prefix+layerWithNewName.name;
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this.layers.push(layerWithNewName);
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}
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}
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}
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public next(): IteratorResult<ITiledMapLayer> {
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if (this.pointer < this.layers.length) {
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return {
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done: false,
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value: this.layers[this.pointer++]
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}
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} else {
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return {
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done: true,
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value: null
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}
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}
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}
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[Symbol.iterator](): IterableIterator<ITiledMapLayer> {
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return new LayersIterator(this.map);
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}
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}
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