| import { OuterSubscriber } from '../OuterSubscriber'; |
| import { subscribeToResult } from '../util/subscribeToResult'; |
| /** |
| * 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> |
| * |
| * <img src="./img/buffer.png" width="100%"> |
| * |
| * 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 <caption>On every click, emit array of most recent interval events</caption> |
| * var clicks = Rx.Observable.fromEvent(document, 'click'); |
| * var interval = Rx.Observable.interval(1000); |
| * var buffered = interval.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(closingNotifier) { |
| return function bufferOperatorFunction(source) { |
| return source.lift(new BufferOperator(closingNotifier)); |
| }; |
| } |
| class BufferOperator { |
| constructor(closingNotifier) { |
| this.closingNotifier = closingNotifier; |
| } |
| call(subscriber, source) { |
| return source.subscribe(new BufferSubscriber(subscriber, this.closingNotifier)); |
| } |
| } |
| /** |
| * We need this JSDoc comment for affecting ESDoc. |
| * @ignore |
| * @extends {Ignored} |
| */ |
| class BufferSubscriber extends OuterSubscriber { |
| constructor(destination, closingNotifier) { |
| super(destination); |
| this.buffer = []; |
| this.add(subscribeToResult(this, closingNotifier)); |
| } |
| _next(value) { |
| this.buffer.push(value); |
| } |
| notifyNext(outerValue, innerValue, outerIndex, innerIndex, innerSub) { |
| const buffer = this.buffer; |
| this.buffer = []; |
| this.destination.next(buffer); |
| } |
| } |
| //# sourceMappingURL=buffer.js.map |