work.suroh.tk/node_modules/rxjs/operators/buffer.js

78 lines
2.9 KiB
JavaScript

"use strict";
var __extends = (this && this.__extends) || function (d, b) {
for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var OuterSubscriber_1 = require('../OuterSubscriber');
var subscribeToResult_1 = require('../util/subscribeToResult');
/**
* 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>
*
* <img src="./img/buffer.png" width="100%">
*
* 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 <caption>On every click, emit array of most recent interval events</caption>
* var clicks = Rx.Observable.fromEvent(document, 'click');
* var interval = Rx.Observable.interval(1000);
* var buffered = interval.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 = (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 = (function (_super) {
__extends(BufferSubscriber, _super);
function BufferSubscriber(destination, closingNotifier) {
_super.call(this, destination);
this.buffer = [];
this.add(subscribeToResult_1.subscribeToResult(this, closingNotifier));
}
BufferSubscriber.prototype._next = function (value) {
this.buffer.push(value);
};
BufferSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) {
var buffer = this.buffer;
this.buffer = [];
this.destination.next(buffer);
};
return BufferSubscriber;
}(OuterSubscriber_1.OuterSubscriber));
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