| import { Subscriber } from '../Subscriber'; |
| import { EmptyObservable } from '../observable/EmptyObservable'; |
| /** |
| * Returns an Observable that repeats the stream of items emitted by the source Observable at most count times. |
| * |
| * <img src="./img/repeat.png" width="100%"> |
| * |
| * @param {number} [count] The number of times the source Observable items are repeated, a count of 0 will yield |
| * an empty Observable. |
| * @return {Observable} An Observable that repeats the stream of items emitted by the source Observable at most |
| * count times. |
| * @method repeat |
| * @owner Observable |
| */ |
| export function repeat(count = -1) { |
| return (source) => { |
| if (count === 0) { |
| return new EmptyObservable(); |
| } |
| else if (count < 0) { |
| return source.lift(new RepeatOperator(-1, source)); |
| } |
| else { |
| return source.lift(new RepeatOperator(count - 1, source)); |
| } |
| }; |
| } |
| class RepeatOperator { |
| constructor(count, source) { |
| this.count = count; |
| this.source = source; |
| } |
| call(subscriber, source) { |
| return source.subscribe(new RepeatSubscriber(subscriber, this.count, this.source)); |
| } |
| } |
| /** |
| * We need this JSDoc comment for affecting ESDoc. |
| * @ignore |
| * @extends {Ignored} |
| */ |
| class RepeatSubscriber extends Subscriber { |
| constructor(destination, count, source) { |
| super(destination); |
| this.count = count; |
| this.source = source; |
| } |
| complete() { |
| if (!this.isStopped) { |
| const { source, count } = this; |
| if (count === 0) { |
| return super.complete(); |
| } |
| else if (count > -1) { |
| this.count = count - 1; |
| } |
| source.subscribe(this._unsubscribeAndRecycle()); |
| } |
| } |
| } |
| //# sourceMappingURL=repeat.js.map |