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-import { Operator } from '../Operator';
-import { Observable } from '../Observable';
-import { Subscriber } from '../Subscriber';
-
-import { OuterSubscriber } from '../OuterSubscriber';
-import { InnerSubscriber } from '../InnerSubscriber';
-import { subscribeToResult } from '../util/subscribeToResult';
-
-import { MonoTypeOperatorFunction, TeardownLogic } from '../types';
-
-/**
- * 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 a value. Then, it completes.</span>
- *
- * ![](takeUntil.png)
- *
- * `takeUntil` subscribes and begins mirroring the source Observable. It also
- * monitors a second Observable, `notifier` that you provide. If the `notifier`
- * emits a value, the output Observable stops mirroring the source Observable
- * and completes. If the `notifier` doesn't emit any value and completes
- * then `takeUntil` will pass all values.
- *
- * ## Example
- * Tick every second until the first click happens
- * ```javascript
- * import { fromEvent, interval } from 'rxjs';
- * import { takeUntil } from 'rxjs/operators';
- *
- * const source = interval(1000);
- * const clicks = fromEvent(document, 'click');
- * const result = source.pipe(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<T>(notifier: Observable<any>): MonoTypeOperatorFunction<T> {
- return (source: Observable<T>) => source.lift(new TakeUntilOperator(notifier));
-}
-
-class TakeUntilOperator<T> implements Operator<T, T> {
- constructor(private notifier: Observable<any>) {
- }
-
- call(subscriber: Subscriber<T>, source: any): TeardownLogic {
- const takeUntilSubscriber = new TakeUntilSubscriber(subscriber);
- const notifierSubscription = subscribeToResult(takeUntilSubscriber, this.notifier);
- if (notifierSubscription && !takeUntilSubscriber.seenValue) {
- takeUntilSubscriber.add(notifierSubscription);
- return source.subscribe(takeUntilSubscriber);
- }
- return takeUntilSubscriber;
- }
-}
-
-/**
- * We need this JSDoc comment for affecting ESDoc.
- * @ignore
- * @extends {Ignored}
- */
-class TakeUntilSubscriber<T, R> extends OuterSubscriber<T, R> {
- seenValue = false;
-
- constructor(destination: Subscriber<any>, ) {
- super(destination);
- }
-
- notifyNext(outerValue: T, innerValue: R,
- outerIndex: number, innerIndex: number,
- innerSub: InnerSubscriber<T, R>): void {
- this.seenValue = true;
- this.complete();
- }
-
- notifyComplete(): void {
- // noop
- }
-}