| 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 |
| } |
| } |
| //# sourceMappingURL=takeUntil.js.map |