@agm/core
Version:
Angular components for Google Maps
55 lines • 8.21 kB
JavaScript
import { Injectable } from '@angular/core';
import { BehaviorSubject, from, timer } from 'rxjs';
import { flatMap, map, sample, shareReplay, switchMap, } from 'rxjs/operators';
import { MapsAPILoader } from './maps-api-loader/maps-api-loader';
/**
* Class to implement when you what to be able to make it work with the auto fit bounds feature
* of AGM.
*/
export class FitBoundsAccessor {
}
/**
* The FitBoundsService is responsible for computing the bounds of the a single map.
*/
export class FitBoundsService {
constructor(loader) {
this._boundsChangeSampleTime$ = new BehaviorSubject(200);
this._includeInBounds$ = new BehaviorSubject(new Map());
this.bounds$ = from(loader.load()).pipe(flatMap(() => this._includeInBounds$), sample(this._boundsChangeSampleTime$.pipe(switchMap(time => timer(0, time)))), map(includeInBounds => this._generateBounds(includeInBounds)), shareReplay(1));
}
_generateBounds(includeInBounds) {
const bounds = new google.maps.LatLngBounds();
includeInBounds.forEach(b => bounds.extend(b));
return bounds;
}
addToBounds(latLng) {
const id = this._createIdentifier(latLng);
if (this._includeInBounds$.value.has(id)) {
return;
}
const boundsMap = this._includeInBounds$.value;
boundsMap.set(id, latLng);
this._includeInBounds$.next(boundsMap);
}
removeFromBounds(latLng) {
const boundsMap = this._includeInBounds$.value;
boundsMap.delete(this._createIdentifier(latLng));
this._includeInBounds$.next(boundsMap);
}
changeFitBoundsChangeSampleTime(timeMs) {
this._boundsChangeSampleTime$.next(timeMs);
}
getBounds$() {
return this.bounds$;
}
_createIdentifier(latLng) {
return `${latLng.lat}+${latLng.lng}`;
}
}
FitBoundsService.decorators = [
{ type: Injectable }
];
FitBoundsService.ctorParameters = () => [
{ type: MapsAPILoader }
];
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