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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| { | ||
| "singleQuote": true | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| import { Directive, OnInit, Self, OnDestroy, Input, OnChanges, SimpleChanges } from '@angular/core'; | ||
| import { FitBoundsService, FitBoundsAccessor, FitBoundsDetails } from '../services/fit-bounds'; | ||
| import { Subscription, Subject } from 'rxjs'; | ||
| import { distinctUntilChanged, takeUntil } from 'rxjs/operators'; | ||
| import { LatLng, LatLngLiteral } from '@agm/core'; | ||
|
|
||
| /** | ||
| * TODO: docs | ||
| */ | ||
| @Directive({ | ||
| selector: '[agmFitBounds]' | ||
| }) | ||
| export class AgmFitBounds implements OnInit, OnDestroy, OnChanges { | ||
| /** | ||
| * If the value is true, the element gets added to the bounds of the map. | ||
| * Default: true. | ||
| */ | ||
| @Input() agmFitBounds: boolean = true; | ||
|
|
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| private _destroyed$: Subject<void> = new Subject<void>(); | ||
| private _latestFitBoundsDetails: FitBoundsDetails | null = null; | ||
|
|
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| constructor( | ||
| @Self() private readonly _fitBoundsAccessor: FitBoundsAccessor, | ||
| private readonly _fitBoundsService: FitBoundsService | ||
| ) {} | ||
|
|
||
| /** | ||
| * @internal | ||
| */ | ||
| ngOnChanges(changes: SimpleChanges) { | ||
| this._updateBounds(); | ||
| } | ||
|
|
||
| /** | ||
| * @internal | ||
| */ | ||
| ngOnInit() { | ||
| this._fitBoundsAccessor | ||
| .getFitBoundsDetails$() | ||
| .pipe( | ||
| distinctUntilChanged( | ||
| (x: FitBoundsDetails, y: FitBoundsDetails) => | ||
| x.latLng.lat === y.latLng.lng | ||
| ), | ||
| takeUntil(this._destroyed$) | ||
| ) | ||
| .subscribe(details => this._updateBounds(details)); | ||
| } | ||
|
|
||
| private _updateBounds(newFitBoundsDetails?: FitBoundsDetails) { | ||
| if (newFitBoundsDetails) { | ||
| this._latestFitBoundsDetails = newFitBoundsDetails; | ||
| } | ||
| if (!this._latestFitBoundsDetails) { | ||
| return; | ||
| } | ||
| if (this.agmFitBounds) { | ||
| this._fitBoundsService.addToBounds(this._latestFitBoundsDetails.latLng); | ||
| } else { | ||
| this._fitBoundsService.removeFromBounds(this._latestFitBoundsDetails.latLng); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * @internal | ||
| */ | ||
| ngOnDestroy() { | ||
| this._destroyed$.next(); | ||
| this._destroyed$.complete(); | ||
| if (this._latestFitBoundsDetails !== null) { | ||
| this._fitBoundsService.removeFromBounds(this._latestFitBoundsDetails.latLng); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| import { Injectable } from '@angular/core'; | ||
| import { BehaviorSubject, Observable, from } from 'rxjs'; | ||
| import { flatMap, map, skipWhile } from 'rxjs/operators'; | ||
| import { LatLng, LatLngBounds, LatLngLiteral } from './google-maps-types'; | ||
| import { MapsAPILoader } from './maps-api-loader/maps-api-loader'; | ||
|
|
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| declare var google: any; | ||
|
|
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| export interface FitBoundsDetails { | ||
| latLng: LatLng|LatLngLiteral; | ||
| } | ||
|
|
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| export abstract class FitBoundsAccessor { | ||
| abstract getFitBoundsDetails$(): Observable<FitBoundsDetails>; | ||
| } | ||
|
|
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| @Injectable() | ||
| export class FitBoundsService { | ||
| readonly bounds$: Observable<LatLngBounds>; | ||
| protected readonly _boundsChangeDebounceTime$: BehaviorSubject<number> = new BehaviorSubject<number>(200); | ||
| protected readonly _includeInBounds$: BehaviorSubject<Map<string, LatLng | LatLngLiteral>> = new BehaviorSubject<Map<string, LatLng | LatLngLiteral>>(new Map<string, LatLng | LatLngLiteral>()); | ||
| protected _emitPaused: boolean = false; | ||
|
|
||
| constructor(loader: MapsAPILoader) { | ||
| this.bounds$ = from(loader.load()).pipe( | ||
| flatMap(() => this._includeInBounds$), | ||
| skipWhile(() => this._emitPaused), | ||
| // debounce(() => this._boundsChangeDebounceTime$), | ||
| map((includeInBounds: Map<string, LatLng | LatLngLiteral>) => { | ||
| const bounds = new google.maps.LatLngBounds() as LatLngBounds; | ||
| includeInBounds.forEach(b => bounds.extend(b)); | ||
| return bounds; | ||
| }) | ||
| ); | ||
| } | ||
|
|
||
| addToBounds(latLng: LatLng | LatLngLiteral) { | ||
| const id = this._createIdentifier(latLng); | ||
| if (this._includeInBounds$.value.has(id)) { | ||
| return; | ||
| } | ||
| const map = this._includeInBounds$.value; | ||
| map.set(id, latLng); | ||
| this._includeInBounds$.next(map); | ||
| } | ||
|
|
||
| removeFromBounds(latLng: LatLng|LatLngLiteral) { | ||
| const map = this._includeInBounds$.value; | ||
| map.delete(this._createIdentifier(latLng)); | ||
| this._includeInBounds$.next(map); | ||
| } | ||
|
|
||
| changeFitBoundsDebounceTime(timeMs: number) { | ||
| this._boundsChangeDebounceTime$.next(timeMs); | ||
| } | ||
|
|
||
| protected _createIdentifier(latLng: LatLng|LatLngLiteral): string { | ||
| return `${latLng.lat}+${latLng.lng}`; | ||
| } | ||
| } |
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