Sha256: 018ab6962f1ff416143a565fb54277faf1b17835d1ebbf353228dcb8b071f178

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Versions: 49

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Stored size: 1.96 KB

Contents

import { Operator } from '../Operator';
import { Subscriber } from '../Subscriber';
import { Observable } from '../Observable';
import { EmptyObservable } from '../observable/EmptyObservable';
import { TeardownLogic } from '../Subscription';
import { MonoTypeOperatorFunction } from '../interfaces';

/**
 * 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<T>(count: number = -1): MonoTypeOperatorFunction<T> {
  return (source: Observable<T>) => {
    if (count === 0) {
      return new EmptyObservable<T>();
    } else if (count < 0) {
      return source.lift(new RepeatOperator(-1, source));
    } else {
      return source.lift(new RepeatOperator(count - 1, source));
    }
  };
}

class RepeatOperator<T> implements Operator<T, T> {
  constructor(private count: number,
              private source: Observable<T>) {
  }
  call(subscriber: Subscriber<T>, source: any): TeardownLogic {
    return source.subscribe(new RepeatSubscriber(subscriber, this.count, this.source));
  }
}

/**
 * We need this JSDoc comment for affecting ESDoc.
 * @ignore
 * @extends {Ignored}
 */
class RepeatSubscriber<T> extends Subscriber<T> {
  constructor(destination: Subscriber<any>,
              private count: number,
              private source: Observable<T>) {
    super(destination);
  }
  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());
    }
  }
}

Version data entries

49 entries across 49 versions & 4 rubygems

Version Path
ilog-0.4.1 node_modules/rxjs/src/operators/repeat.ts
ilog-0.4.0 node_modules/rxjs/src/operators/repeat.ts
ilog-0.3.3 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-18.0.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.21.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.20.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.19.1 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.19.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.18.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.17.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.16.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.15.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.14.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.13.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.12.2 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.12.1 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.12.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.11.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.10.0 node_modules/rxjs/src/operators/repeat.ts
govuk_publishing_components-17.9.0 node_modules/rxjs/src/operators/repeat.ts