43 lines
1.5 KiB
TypeScript
43 lines
1.5 KiB
TypeScript
import { FeatureSource, FeatureSourceForLayer } from "../FeatureSource"
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import StaticFeatureSource from "./StaticFeatureSource"
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import { BBox } from "../../BBox"
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import FilteredLayer from "../../../Models/FilteredLayer"
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import { Store } from "../../UIEventSource"
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import { Feature } from "geojson"
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/**
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* Results in a feature source which has all the elements that touch the given features
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*/
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export default class BBoxFeatureSource<T extends Feature = Feature> extends StaticFeatureSource<T> {
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constructor(features: FeatureSource<T>, mustTouch: Store<BBox>) {
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super(
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features.features.mapD(
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(features) => {
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if (mustTouch.data === undefined) {
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return features
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}
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const box = mustTouch.data
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return features.filter((feature) => {
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if (feature.geometry.type === "Point") {
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return box.contains(<[number, number]>feature.geometry.coordinates)
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}
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return box.overlapsWith(BBox.get(feature))
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})
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},
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[mustTouch]
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)
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)
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}
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}
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export class BBoxFeatureSourceForLayer<T extends Feature = Feature>
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extends BBoxFeatureSource<T>
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implements FeatureSourceForLayer
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{
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readonly layer: FilteredLayer
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constructor(features: FeatureSourceForLayer<T>, mustTouch: Store<BBox>) {
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super(features, mustTouch)
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this.layer = features.layer
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}
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}
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