@reactivex/rxjs
Version:
Reactive Extensions for modern JavaScript
95 lines • 3.38 kB
JavaScript
;
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
}
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
var innerSubscribe_1 = require("../innerSubscribe");
/**
* Buffers the source Observable values until `closingNotifier` emits.
*
* <span class="informal">Collects values from the past as an array, and emits
* that array only when another Observable emits.</span>
*
* 
*
* Buffers the incoming Observable values until the given `closingNotifier`
* Observable emits a value, at which point it emits the buffer on the output
* Observable and starts a new buffer internally, awaiting the next time
* `closingNotifier` emits.
*
* ## Example
*
* On every click, emit array of most recent interval events
*
* ```ts
* import { fromEvent, interval } from 'rxjs';
* import { buffer } from 'rxjs/operators';
*
* const clicks = fromEvent(document, 'click');
* const intervalEvents = interval(1000);
* const buffered = intervalEvents.pipe(buffer(clicks));
* buffered.subscribe(x => console.log(x));
* ```
*
* @see {@link bufferCount}
* @see {@link bufferTime}
* @see {@link bufferToggle}
* @see {@link bufferWhen}
* @see {@link window}
*
* @param {Observable<any>} closingNotifier An Observable that signals the
* buffer to be emitted on the output Observable.
* @return {Observable<T[]>} An Observable of buffers, which are arrays of
* values.
* @method buffer
* @owner Observable
*/
function buffer(closingNotifier) {
return function bufferOperatorFunction(source) {
return source.lift(new BufferOperator(closingNotifier));
};
}
exports.buffer = buffer;
var BufferOperator = /** @class */ (function () {
function BufferOperator(closingNotifier) {
this.closingNotifier = closingNotifier;
}
BufferOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new BufferSubscriber(subscriber, this.closingNotifier));
};
return BufferOperator;
}());
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
var BufferSubscriber = /** @class */ (function (_super) {
__extends(BufferSubscriber, _super);
function BufferSubscriber(destination, closingNotifier) {
var _this = _super.call(this, destination) || this;
_this.buffer = [];
_this.add(innerSubscribe_1.innerSubscribe(closingNotifier, new innerSubscribe_1.SimpleInnerSubscriber(_this)));
return _this;
}
BufferSubscriber.prototype._next = function (value) {
this.buffer.push(value);
};
BufferSubscriber.prototype.notifyNext = function () {
var buffer = this.buffer;
this.buffer = [];
this.destination.next(buffer);
};
return BufferSubscriber;
}(innerSubscribe_1.SimpleOuterSubscriber));
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