You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.9 KiB
48 lines
1.9 KiB
import { Observable } from '../Observable';
|
|
import { OperatorFunction } from '../types';
|
|
/**
|
|
* Branch out the source Observable values as a nested Observable using a
|
|
* factory function of closing Observables to determine when to start a new
|
|
* window.
|
|
*
|
|
* <span class="informal">It's like {@link bufferWhen}, but emits a nested
|
|
* Observable instead of an array.</span>
|
|
*
|
|
* 
|
|
*
|
|
* 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
|
|
* produced by the specified `closingSelector` function emits an item. The first
|
|
* window is opened immediately when subscribing to the output Observable.
|
|
*
|
|
* ## Example
|
|
* Emit only the first two clicks events in every window of [1-5] random seconds
|
|
* ```ts
|
|
* import { fromEvent, interval } from 'rxjs';
|
|
* import { windowWhen, map, mergeAll, take } from 'rxjs/operators';
|
|
*
|
|
* const clicks = fromEvent(document, 'click');
|
|
* const result = clicks.pipe(
|
|
* windowWhen(() => interval(1000 + Math.random() * 4000)),
|
|
* 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 window}
|
|
* @see {@link windowCount}
|
|
* @see {@link windowTime}
|
|
* @see {@link windowToggle}
|
|
* @see {@link bufferWhen}
|
|
*
|
|
* @param {function(): Observable} closingSelector A function that takes no
|
|
* arguments and returns an Observable that signals (on either `next` or
|
|
* `complete`) when to close the previous window and start a new one.
|
|
* @return {Observable<Observable<T>>} An observable of windows, which in turn
|
|
* are Observables.
|
|
* @method windowWhen
|
|
* @owner Observable
|
|
*/
|
|
export declare function windowWhen<T>(closingSelector: () => Observable<any>): OperatorFunction<T, Observable<T>>;
|
|
|