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PATH: usr / local / lib / node_modules / ghost-cli / node_modules / rxjs / src / internal / operators

import { Observable } from '../Observable';
import { OperatorFunction } from '../types';
import { Subject } from '../Subject';
import { Subscriber } from '../Subscriber';
import { OuterSubscriber } from '../OuterSubscriber';
import { InnerSubscriber } from '../InnerSubscriber';
import { subscribeToResult } from '../util/subscribeToResult';
import { Operator } from '../Operator';

/**
 * Branch out the source Observable values as a nested Observable whenever
 * `windowBoundaries` emits.
 *
 * <span class="informal">It's like {@link buffer}, but emits a nested Observable
 * instead of an array.</span>
 *
 * ![](window.png)
 *
 * Returns an Observable that emits windows of items it collects from the source
 * Observable. The output Observable emits connected, non-overlapping
 * windows. It emits the current window and opens a new one whenever the
 * Observable `windowBoundaries` emits an item. Because each window is an
 * Observable, the output is a higher-order Observable.
 *
 * ## Example
 * In every window of 1 second each, emit at most 2 click events
 * ```ts
 * import { fromEvent, interval } from 'rxjs';
 * import { window, mergeAll, map, take } from 'rxjs/operators';
 *
 *  const clicks = fromEvent(document, 'click');
 *  const sec = interval(1000);
 *  const result = clicks.pipe(
 *      window(sec),
 *      map(win => win.pipe(take(2))), // each window has at most 2 emissions
 *      mergeAll(),              // flatten the Observable-of-Observables
 *  );
 *  result.subscribe(x => console.log(x));
 * ```
 * @see {@link windowCount}
 * @see {@link windowTime}
 * @see {@link windowToggle}
 * @see {@link windowWhen}
 * @see {@link buffer}
 *
 * @param {Observable<any>} windowBoundaries An Observable that completes the
 * previous window and starts a new window.
 * @return {Observable<Observable<T>>} An Observable of windows, which are
 * Observables emitting values of the source Observable.
 * @method window
 * @owner Observable
 */
export function window<T>(windowBoundaries: Observable<any>): OperatorFunction<T, Observable<T>> {
  return function windowOperatorFunction(source: Observable<T>) {
    return source.lift(new WindowOperator(windowBoundaries));
  };
}

class WindowOperator<T> implements Operator<T, Observable<T>> {

constructor(private windowBoundaries: Observable<any>) {
  }

call(subscriber: Subscriber<Observable<T>>, source: any): any {
    const windowSubscriber = new WindowSubscriber(subscriber);
    const sourceSubscription = source.subscribe(windowSubscriber);
    if (!sourceSubscription.closed) {
      windowSubscriber.add(subscribeToResult(windowSubscriber, this.windowBoundaries));
    }
    return sourceSubscription;
  }
}

/**
 * We need this JSDoc comment for affecting ESDoc.
 * @ignore
 * @extends {Ignored}
 */
class WindowSubscriber<T> extends OuterSubscriber<T, any> {

private window: Subject<T> = new Subject<T>();

constructor(destination: Subscriber<Observable<T>>) {
    super(destination);
    destination.next(this.window);
  }

notifyNext(outerValue: T, innerValue: any,
             outerIndex: number, innerIndex: number,
             innerSub: InnerSubscriber<T, any>): void {
    this.openWindow();
  }

notifyError(error: any, innerSub: InnerSubscriber<T, any>): void {
    this._error(error);
  }

notifyComplete(innerSub: InnerSubscriber<T, any>): void {
    this._complete();
  }

protected _next(value: T): void {
    this.window.next(value);
  }

protected _error(err: any): void {
    this.window.error(err);
    this.destination.error(err);
  }

protected _complete(): void {
    this.window.complete();
    this.destination.complete();
  }

/** @deprecated This is an internal implementation detail, do not use. */
  _unsubscribe() {
    this.window = null;
  }

private openWindow(): void  {
    const prevWindow = this.window;
    if (prevWindow) {
      prevWindow.complete();
    }
    const destination = this.destination;
    const newWindow = this.window = new Subject<T>();
    destination.next(newWindow);
  }
}

[-] toArray.ts [edit]
[-] window.ts [edit]
[-] retry.ts [edit]
[-] mergeAll.ts [edit]
[-] windowWhen.ts [edit]
[-] every.ts [edit]
[-] timeout.ts [edit]
[-] debounceTime.ts [edit]
[-] index.ts [edit]
[-] takeWhile.ts [edit]
[-] audit.ts [edit]
[-] reduce.ts [edit]
[-] mapTo.ts [edit]
[-] count.ts [edit]
[-] debounce.ts [edit]
[-] throwIfEmpty.ts [edit]
[-] auditTime.ts [edit]
[-] scan.ts [edit]
[-] switchAll.ts [edit]
[-] map.ts [edit]
[-] bufferCount.ts [edit]
[-] mergeScan.ts [edit]
[-] publish.ts [edit]
[-] min.ts [edit]
[+] ..
[-] publishReplay.ts [edit]
[-] bufferTime.ts [edit]
[-] share.ts [edit]
[-] repeat.ts [edit]
[-] distinct.ts [edit]
[-] concatMapTo.ts [edit]
[-] buffer.ts [edit]
[-] concatMap.ts [edit]
[-] max.ts [edit]
[-] partition.ts [edit]
[-] observeOn.ts [edit]
[-] bufferWhen.ts [edit]
[-] dematerialize.ts [edit]
[-] throttle.ts [edit]
[-] groupBy.ts [edit]
[-] withLatestFrom.ts [edit]
[-] exhaust.ts [edit]
[-] exhaustMap.ts [edit]
[-] retryWhen.ts [edit]
[-] zipAll.ts [edit]
[-] find.ts [edit]
[-] mergeMap.ts [edit]
[-] single.ts [edit]
[-] last.ts [edit]
[-] combineLatest.ts [edit]
[-] publishLast.ts [edit]
[-] pluck.ts [edit]
[-] pairwise.ts [edit]
[-] distinctUntilChanged.ts [edit]
[-] timeInterval.ts [edit]
[-] shareReplay.ts [edit]
[-] skipUntil.ts [edit]
[-] findIndex.ts [edit]
[-] windowToggle.ts [edit]
[-] startWith.ts [edit]
[-] timeoutWith.ts [edit]
[-] concat.ts [edit]
[-] materialize.ts [edit]
[-] timestamp.ts [edit]
[-] onErrorResumeNext.ts [edit]
[-] subscribeOn.ts [edit]
[-] takeUntil.ts [edit]
[-] skipLast.ts [edit]
[-] throttleTime.ts [edit]
[-] mergeMapTo.ts [edit]
[-] multicast.ts [edit]
[-] merge.ts [edit]
[-] takeLast.ts [edit]
[-] delayWhen.ts [edit]
[-] sampleTime.ts [edit]
[-] tap.ts [edit]
[-] take.ts [edit]
[-] sample.ts [edit]
[-] filter.ts [edit]
[-] skip.ts [edit]
[-] expand.ts [edit]
[-] publishBehavior.ts [edit]
[-] sequenceEqual.ts [edit]
[-] ignoreElements.ts [edit]
[-] catchError.ts [edit]
[-] endWith.ts [edit]
[-] refCount.ts [edit]
[-] windowCount.ts [edit]
[-] defaultIfEmpty.ts [edit]
[-] windowTime.ts [edit]
[-] switchMapTo.ts [edit]
[-] switchMap.ts [edit]
[-] delay.ts [edit]
[-] bufferToggle.ts [edit]
[-] repeatWhen.ts [edit]
[-] concatAll.ts [edit]
[-] first.ts [edit]
[-] zip.ts [edit]
[-] elementAt.ts [edit]
[-] skipWhile.ts [edit]
[-] race.ts [edit]
[-] finalize.ts [edit]
[-] combineAll.ts [edit]
[-] distinctUntilKeyChanged.ts [edit]
[-] isEmpty.ts [edit]