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42 lines
1.9 KiB
42 lines
1.9 KiB
2 years ago
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import { SubscribableOrPromise } from '../Observable';
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import { OperatorFunction } from '../interfaces';
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/**
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* Buffers the source Observable values starting from an emission from
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* `openings` and ending when the output of `closingSelector` emits.
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*
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* <span class="informal">Collects values from the past as an array. Starts
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* collecting only when `opening` emits, and calls the `closingSelector`
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* function to get an Observable that tells when to close the buffer.</span>
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*
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* <img src="./img/bufferToggle.png" width="100%">
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*
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* Buffers values from the source by opening the buffer via signals from an
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* Observable provided to `openings`, and closing and sending the buffers when
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* a Subscribable or Promise returned by the `closingSelector` function emits.
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*
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* @example <caption>Every other second, emit the click events from the next 500ms</caption>
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* var clicks = Rx.Observable.fromEvent(document, 'click');
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* var openings = Rx.Observable.interval(1000);
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* var buffered = clicks.bufferToggle(openings, i =>
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* i % 2 ? Rx.Observable.interval(500) : Rx.Observable.empty()
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* );
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* buffered.subscribe(x => console.log(x));
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*
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* @see {@link buffer}
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* @see {@link bufferCount}
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* @see {@link bufferTime}
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* @see {@link bufferWhen}
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* @see {@link windowToggle}
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*
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* @param {SubscribableOrPromise<O>} openings A Subscribable or Promise of notifications to start new
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* buffers.
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* @param {function(value: O): SubscribableOrPromise} closingSelector A function that takes
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* the value emitted by the `openings` observable and returns a Subscribable or Promise,
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* which, when it emits, signals that the associated buffer should be emitted
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* and cleared.
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* @return {Observable<T[]>} An observable of arrays of buffered values.
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* @method bufferToggle
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* @owner Observable
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*/
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export declare function bufferToggle<T, O>(openings: SubscribableOrPromise<O>, closingSelector: (value: O) => SubscribableOrPromise<any>): OperatorFunction<T, T[]>;
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