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-import { Operator } from '../Operator';
-import { Subscriber } from '../Subscriber';
-import { Observable } from '../Observable';
-import { OuterSubscriber } from '../OuterSubscriber';
-import { InnerSubscriber } from '../InnerSubscriber';
-import { subscribeToResult } from '../util/subscribeToResult';
-import { OperatorFunction } from '../types';
-
-/**
- * Buffers the source Observable values until `closingNotifier` emits.
- *
- * <span class="informal">Collects values from the past as an array, and emits
- * that array only when another Observable emits.</span>
- *
- * ![](content/img/buffer.png)
- *
- * Buffers the incoming Observable values until the given `closingNotifier`
- * Observable emits a value, at which point it emits the buffer on the output
- * Observable and starts a new buffer internally, awaiting the next time
- * `closingNotifier` emits.
- *
- * ## Example
- *
- * On every click, emit array of most recent interval events
- *
- * ```javascript
- * import { fromEvent, interval } from 'rxjs';
- * import { buffer } from 'rxjs/operators';
- *
- * const clicks = fromEvent(document, 'click');
- * const interval = interval(1000);
- * const buffered = interval.pipe(buffer(clicks));
- * buffered.subscribe(x => console.log(x));
- * ```
- *
- * @see {@link bufferCount}
- * @see {@link bufferTime}
- * @see {@link bufferToggle}
- * @see {@link bufferWhen}
- * @see {@link window}
- *
- * @param {Observable<any>} closingNotifier An Observable that signals the
- * buffer to be emitted on the output Observable.
- * @return {Observable<T[]>} An Observable of buffers, which are arrays of
- * values.
- * @method buffer
- * @owner Observable
- */
-export function buffer<T>(closingNotifier: Observable<any>): OperatorFunction<T, T[]> {
- return function bufferOperatorFunction(source: Observable<T>) {
- return source.lift(new BufferOperator<T>(closingNotifier));
- };
-}
-
-class BufferOperator<T> implements Operator<T, T[]> {
-
- constructor(private closingNotifier: Observable<any>) {
- }
-
- call(subscriber: Subscriber<T[]>, source: any): any {
- return source.subscribe(new BufferSubscriber(subscriber, this.closingNotifier));
- }
-}
-
-/**
- * We need this JSDoc comment for affecting ESDoc.
- * @ignore
- * @extends {Ignored}
- */
-class BufferSubscriber<T> extends OuterSubscriber<T, any> {
- private buffer: T[] = [];
-
- constructor(destination: Subscriber<T[]>, closingNotifier: Observable<any>) {
- super(destination);
- this.add(subscribeToResult(this, closingNotifier));
- }
-
- protected _next(value: T) {
- this.buffer.push(value);
- }
-
- notifyNext(outerValue: T, innerValue: any,
- outerIndex: number, innerIndex: number,
- innerSub: InnerSubscriber<T, any>): void {
- const buffer = this.buffer;
- this.buffer = [];
- this.destination.next(buffer);
- }
-}