Opal-Estate-Pro/node_modules/rxjs/_esm2015/operators/takeUntil.js

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2019-09-13 06:27:52 +02:00
import { OuterSubscriber } from '../OuterSubscriber';
import { subscribeToResult } from '../util/subscribeToResult';
/**
* Emits the values emitted by the source Observable until a `notifier`
* Observable emits a value.
*
* <span class="informal">Lets values pass until a second Observable,
* `notifier`, emits something. Then, it completes.</span>
*
* <img src="./img/takeUntil.png" width="100%">
*
* `takeUntil` subscribes and begins mirroring the source Observable. It also
* monitors a second Observable, `notifier` that you provide. If the `notifier`
* emits a value or a complete notification, the output Observable stops
* mirroring the source Observable and completes.
*
* @example <caption>Tick every second until the first click happens</caption>
* var interval = Rx.Observable.interval(1000);
* var clicks = Rx.Observable.fromEvent(document, 'click');
* var result = interval.takeUntil(clicks);
* result.subscribe(x => console.log(x));
*
* @see {@link take}
* @see {@link takeLast}
* @see {@link takeWhile}
* @see {@link skip}
*
* @param {Observable} notifier The Observable whose first emitted value will
* cause the output Observable of `takeUntil` to stop emitting values from the
* source Observable.
* @return {Observable<T>} An Observable that emits the values from the source
* Observable until such time as `notifier` emits its first value.
* @method takeUntil
* @owner Observable
*/
export function takeUntil(notifier) {
return (source) => source.lift(new TakeUntilOperator(notifier));
}
class TakeUntilOperator {
constructor(notifier) {
this.notifier = notifier;
}
call(subscriber, source) {
return source.subscribe(new TakeUntilSubscriber(subscriber, this.notifier));
}
}
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
class TakeUntilSubscriber extends OuterSubscriber {
constructor(destination, notifier) {
super(destination);
this.notifier = notifier;
this.add(subscribeToResult(this, notifier));
}
notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) {
this.complete();
}
notifyComplete() {
// noop
}
}
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