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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | 1x 23x 23x 23x 23x 21x 1x 1x 1x 1x | /**
* Copyright (c) Siemens 2016 - 2025
* SPDX-License-Identifier: MIT
*/
import { Injectable } from '@angular/core';
import { BehaviorSubject, timer } from 'rxjs';
import {
distinctUntilChanged,
endWith,
filter,
map,
repeat,
share,
takeUntil
} from 'rxjs/operators';
/**
* A global blink pulse generator for synchronized blinking patterns across an entire application.
* Use to trigger any blinking by subscribing to `pulse$`.
*/
@Injectable({ providedIn: 'root' })
export class BlinkService {
private pause$ = new BehaviorSubject<boolean>(false);
private off$ = this.pause$.pipe(filter(v => v));
private on$ = this.pause$.pipe(filter(v => !v));
/**
* Blink pulse. Subscribe to it to toggle `on` CSS class when true, `off` CSS class when `false`.
* Do animations using CSS transitions
*
* @defaultValue
* ```
* timer(0, 1400).pipe(
* map(count => count % 2 === 0),
* distinctUntilChanged(),
* takeUntil(this.off$),
* endWith(false),
* repeat({ delay: () => this.on$ }),
* share()
* )
* ```
*/
public readonly pulse$ = timer(0, 1400).pipe(
map(count => count % 2 === 0),
distinctUntilChanged(),
takeUntil(this.off$),
endWith(false),
repeat({ delay: () => this.on$ }),
share()
);
/**
* Pause the blinking.
*/
pause(): void {
this.pause$.next(true);
}
/**
* Resume the blinking.
*/
resume(): void {
this.pause$.next(false);
}
/**
* Whether the blinking is paused or not.
*/
isPaused(): boolean {
return this.pause$.value;
}
}
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