| /** PURE_IMPORTS_START .._Subject,.._util_tryCatch,.._util_errorObject,.._OuterSubscriber,.._util_subscribeToResult 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 { Subject } from '../Subject'; |
| import { tryCatch } from '../util/tryCatch'; |
| import { errorObject } from '../util/errorObject'; |
| import { OuterSubscriber } from '../OuterSubscriber'; |
| import { subscribeToResult } from '../util/subscribeToResult'; |
| /** |
| * 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> |
| * |
| * <img src="./img/windowWhen.png" width="100%"> |
| * |
| * 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 <caption>Emit only the first two clicks events in every window of [1-5] random seconds</caption> |
| * var clicks = Rx.Observable.fromEvent(document, 'click'); |
| * var result = clicks |
| * .windowWhen(() => Rx.Observable.interval(1000 + Math.random() * 4000)) |
| * .map(win => win.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 function windowWhen(closingSelector) { |
| return function windowWhenOperatorFunction(source) { |
| return source.lift(new WindowOperator(closingSelector)); |
| }; |
| } |
| var WindowOperator = /*@__PURE__*/ (/*@__PURE__*/ function () { |
| function WindowOperator(closingSelector) { |
| this.closingSelector = closingSelector; |
| } |
| WindowOperator.prototype.call = function (subscriber, source) { |
| return source.subscribe(new WindowSubscriber(subscriber, this.closingSelector)); |
| }; |
| return WindowOperator; |
| }()); |
| /** |
| * We need this JSDoc comment for affecting ESDoc. |
| * @ignore |
| * @extends {Ignored} |
| */ |
| var WindowSubscriber = /*@__PURE__*/ (/*@__PURE__*/ function (_super) { |
| __extends(WindowSubscriber, _super); |
| function WindowSubscriber(destination, closingSelector) { |
| _super.call(this, destination); |
| this.destination = destination; |
| this.closingSelector = closingSelector; |
| this.openWindow(); |
| } |
| WindowSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) { |
| this.openWindow(innerSub); |
| }; |
| WindowSubscriber.prototype.notifyError = function (error, innerSub) { |
| this._error(error); |
| }; |
| WindowSubscriber.prototype.notifyComplete = function (innerSub) { |
| this.openWindow(innerSub); |
| }; |
| WindowSubscriber.prototype._next = function (value) { |
| this.window.next(value); |
| }; |
| WindowSubscriber.prototype._error = function (err) { |
| this.window.error(err); |
| this.destination.error(err); |
| this.unsubscribeClosingNotification(); |
| }; |
| WindowSubscriber.prototype._complete = function () { |
| this.window.complete(); |
| this.destination.complete(); |
| this.unsubscribeClosingNotification(); |
| }; |
| WindowSubscriber.prototype.unsubscribeClosingNotification = function () { |
| if (this.closingNotification) { |
| this.closingNotification.unsubscribe(); |
| } |
| }; |
| WindowSubscriber.prototype.openWindow = function (innerSub) { |
| if (innerSub === void 0) { |
| innerSub = null; |
| } |
| if (innerSub) { |
| this.remove(innerSub); |
| innerSub.unsubscribe(); |
| } |
| var prevWindow = this.window; |
| if (prevWindow) { |
| prevWindow.complete(); |
| } |
| var window = this.window = new Subject(); |
| this.destination.next(window); |
| var closingNotifier = tryCatch(this.closingSelector)(); |
| if (closingNotifier === errorObject) { |
| var err = errorObject.e; |
| this.destination.error(err); |
| this.window.error(err); |
| } |
| else { |
| this.add(this.closingNotification = subscribeToResult(this, closingNotifier)); |
| } |
| }; |
| return WindowSubscriber; |
| }(OuterSubscriber)); |
| //# sourceMappingURL=windowWhen.js.map |