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48 changes: 32 additions & 16 deletions
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projects/ngx-drag-to-select/src/lib/keyboard-events.service.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,26 +1,42 @@ | ||
| import { Injectable } from '@angular/core'; | ||
| import { isPlatformBrowser } from '@angular/common'; | ||
| import { Inject, Injectable, PLATFORM_ID } from '@angular/core'; | ||
| import { fromEvent, Observable } from 'rxjs'; | ||
| import { share } from 'rxjs/operators'; | ||
| import { fromEvent } from 'rxjs'; | ||
| import { distinctKeyEvents } from './operators'; | ||
|
|
||
| @Injectable() | ||
| export class KeyboardEventsService { | ||
| keydown$ = fromEvent<KeyboardEvent>(window, 'keydown').pipe(share()); | ||
| keyup$ = fromEvent<KeyboardEvent>(window, 'keyup').pipe(share()); | ||
| keydown$: Observable<KeyboardEvent>; | ||
| keyup$: Observable<KeyboardEvent>; | ||
| distinctKeydown$: Observable<KeyboardEvent>; | ||
| distinctKeyup$: Observable<KeyboardEvent>; | ||
| mouseup$: Observable<MouseEvent>; | ||
| mousemove$: Observable<MouseEvent>; | ||
|
|
||
| // distinctKeyEvents is used to prevent multiple key events to be fired repeatedly | ||
| // on Windows when a key is being pressed | ||
| constructor(@Inject(PLATFORM_ID) private platformId: Object) { | ||
| if (isPlatformBrowser(this.platformId)) { | ||
| this._initializeKeyboardStreams(); | ||
| } | ||
| } | ||
|
|
||
| distinctKeydown$ = this.keydown$.pipe( | ||
| distinctKeyEvents(), | ||
| share() | ||
| ); | ||
| private _initializeKeyboardStreams() { | ||
| this.keydown$ = fromEvent<KeyboardEvent>(window, 'keydown').pipe(share()); | ||
| this.keyup$ = fromEvent<KeyboardEvent>(window, 'keyup').pipe(share()); | ||
|
|
||
| distinctKeyup$ = this.keyup$.pipe( | ||
| distinctKeyEvents(), | ||
| share() | ||
| ); | ||
| // distinctKeyEvents is used to prevent multiple key events to be fired repeatedly | ||
| // on Windows when a key is being pressed | ||
|
|
||
| mouseup$ = fromEvent<MouseEvent>(window, 'mouseup').pipe(share()); | ||
| mousemove$ = fromEvent<MouseEvent>(window, 'mousemove').pipe(share()); | ||
| this.distinctKeydown$ = this.keydown$.pipe( | ||
| distinctKeyEvents(), | ||
| share() | ||
| ); | ||
|
|
||
| this.distinctKeyup$ = this.keyup$.pipe( | ||
| distinctKeyEvents(), | ||
| share() | ||
| ); | ||
|
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||
| this.mouseup$ = fromEvent<MouseEvent>(window, 'mouseup').pipe(share()); | ||
| this.mousemove$ = fromEvent<MouseEvent>(window, 'mousemove').pipe(share()); | ||
| } | ||
| } |
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