| /** PURE_IMPORTS_START .._Subscription,.._util_subscribeToResult,.._OuterSubscriber PURE_IMPORTS_END */ |
| 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 __()); |
| }; |
| import { Subscription } from '../Subscription'; |
| import { subscribeToResult } from '../util/subscribeToResult'; |
| import { OuterSubscriber } from '../OuterSubscriber'; |
| /** |
| * Buffers the source Observable values starting from an emission from |
| * `openings` and ending when the output of `closingSelector` emits. |
| * |
| * <span class="informal">Collects values from the past as an array. Starts |
| * collecting only when `opening` emits, and calls the `closingSelector` |
| * function to get an Observable that tells when to close the buffer.</span> |
| * |
| * <img src="./img/bufferToggle.png" width="100%"> |
| * |
| * Buffers values from the source by opening the buffer via signals from an |
| * Observable provided to `openings`, and closing and sending the buffers when |
| * a Subscribable or Promise returned by the `closingSelector` function emits. |
| * |
| * @example <caption>Every other second, emit the click events from the next 500ms</caption> |
| * var clicks = Rx.Observable.fromEvent(document, 'click'); |
| * var openings = Rx.Observable.interval(1000); |
| * var buffered = clicks.bufferToggle(openings, i => |
| * i % 2 ? Rx.Observable.interval(500) : Rx.Observable.empty() |
| * ); |
| * buffered.subscribe(x => console.log(x)); |
| * |
| * @see {@link buffer} |
| * @see {@link bufferCount} |
| * @see {@link bufferTime} |
| * @see {@link bufferWhen} |
| * @see {@link windowToggle} |
| * |
| * @param {SubscribableOrPromise<O>} openings A Subscribable or Promise of notifications to start new |
| * buffers. |
| * @param {function(value: O): SubscribableOrPromise} closingSelector A function that takes |
| * the value emitted by the `openings` observable and returns a Subscribable or Promise, |
| * which, when it emits, signals that the associated buffer should be emitted |
| * and cleared. |
| * @return {Observable<T[]>} An observable of arrays of buffered values. |
| * @method bufferToggle |
| * @owner Observable |
| */ |
| export function bufferToggle(openings, closingSelector) { |
| return function bufferToggleOperatorFunction(source) { |
| return source.lift(new BufferToggleOperator(openings, closingSelector)); |
| }; |
| } |
| var BufferToggleOperator = /*@__PURE__*/ (/*@__PURE__*/ function () { |
| function BufferToggleOperator(openings, closingSelector) { |
| this.openings = openings; |
| this.closingSelector = closingSelector; |
| } |
| BufferToggleOperator.prototype.call = function (subscriber, source) { |
| return source.subscribe(new BufferToggleSubscriber(subscriber, this.openings, this.closingSelector)); |
| }; |
| return BufferToggleOperator; |
| }()); |
| /** |
| * We need this JSDoc comment for affecting ESDoc. |
| * @ignore |
| * @extends {Ignored} |
| */ |
| var BufferToggleSubscriber = /*@__PURE__*/ (/*@__PURE__*/ function (_super) { |
| __extends(BufferToggleSubscriber, _super); |
| function BufferToggleSubscriber(destination, openings, closingSelector) { |
| _super.call(this, destination); |
| this.openings = openings; |
| this.closingSelector = closingSelector; |
| this.contexts = []; |
| this.add(subscribeToResult(this, openings)); |
| } |
| BufferToggleSubscriber.prototype._next = function (value) { |
| var contexts = this.contexts; |
| var len = contexts.length; |
| for (var i = 0; i < len; i++) { |
| contexts[i].buffer.push(value); |
| } |
| }; |
| BufferToggleSubscriber.prototype._error = function (err) { |
| var contexts = this.contexts; |
| while (contexts.length > 0) { |
| var context = contexts.shift(); |
| context.subscription.unsubscribe(); |
| context.buffer = null; |
| context.subscription = null; |
| } |
| this.contexts = null; |
| _super.prototype._error.call(this, err); |
| }; |
| BufferToggleSubscriber.prototype._complete = function () { |
| var contexts = this.contexts; |
| while (contexts.length > 0) { |
| var context = contexts.shift(); |
| this.destination.next(context.buffer); |
| context.subscription.unsubscribe(); |
| context.buffer = null; |
| context.subscription = null; |
| } |
| this.contexts = null; |
| _super.prototype._complete.call(this); |
| }; |
| BufferToggleSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) { |
| outerValue ? this.closeBuffer(outerValue) : this.openBuffer(innerValue); |
| }; |
| BufferToggleSubscriber.prototype.notifyComplete = function (innerSub) { |
| this.closeBuffer(innerSub.context); |
| }; |
| BufferToggleSubscriber.prototype.openBuffer = function (value) { |
| try { |
| var closingSelector = this.closingSelector; |
| var closingNotifier = closingSelector.call(this, value); |
| if (closingNotifier) { |
| this.trySubscribe(closingNotifier); |
| } |
| } |
| catch (err) { |
| this._error(err); |
| } |
| }; |
| BufferToggleSubscriber.prototype.closeBuffer = function (context) { |
| var contexts = this.contexts; |
| if (contexts && context) { |
| var buffer = context.buffer, subscription = context.subscription; |
| this.destination.next(buffer); |
| contexts.splice(contexts.indexOf(context), 1); |
| this.remove(subscription); |
| subscription.unsubscribe(); |
| } |
| }; |
| BufferToggleSubscriber.prototype.trySubscribe = function (closingNotifier) { |
| var contexts = this.contexts; |
| var buffer = []; |
| var subscription = new Subscription(); |
| var context = { buffer: buffer, subscription: subscription }; |
| contexts.push(context); |
| var innerSubscription = subscribeToResult(this, closingNotifier, context); |
| if (!innerSubscription || innerSubscription.closed) { |
| this.closeBuffer(context); |
| } |
| else { |
| innerSubscription.context = context; |
| this.add(innerSubscription); |
| subscription.add(innerSubscription); |
| } |
| }; |
| return BufferToggleSubscriber; |
| }(OuterSubscriber)); |
| //# sourceMappingURL=bufferToggle.js.map |