| /** PURE_IMPORTS_START .._scheduler_async,.._util_isDate,.._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 { async } from '../scheduler/async'; |
| import { isDate } from '../util/isDate'; |
| import { OuterSubscriber } from '../OuterSubscriber'; |
| import { subscribeToResult } from '../util/subscribeToResult'; |
| /* tslint:enable:max-line-length */ |
| /** |
| * |
| * Errors if Observable does not emit a value in given time span, in case of which |
| * subscribes to the second Observable. |
| * |
| * <span class="informal">It's a version of `timeout` operator that let's you specify fallback Observable.</span> |
| * |
| * <img src="./img/timeoutWith.png" width="100%"> |
| * |
| * `timeoutWith` is a variation of `timeout` operator. It behaves exactly the same, |
| * still accepting as a first argument either a number or a Date, which control - respectively - |
| * when values of source Observable should be emitted or when it should complete. |
| * |
| * The only difference is that it accepts a second, required parameter. This parameter |
| * should be an Observable which will be subscribed when source Observable fails any timeout check. |
| * So whenever regular `timeout` would emit an error, `timeoutWith` will instead start re-emitting |
| * values from second Observable. Note that this fallback Observable is not checked for timeouts |
| * itself, so it can emit values and complete at arbitrary points in time. From the moment of a second |
| * subscription, Observable returned from `timeoutWith` simply mirrors fallback stream. When that |
| * stream completes, it completes as well. |
| * |
| * Scheduler, which in case of `timeout` is provided as as second argument, can be still provided |
| * here - as a third, optional parameter. It still is used to schedule timeout checks and - |
| * as a consequence - when second Observable will be subscribed, since subscription happens |
| * immediately after failing check. |
| * |
| * @example <caption>Add fallback observable</caption> |
| * const seconds = Rx.Observable.interval(1000); |
| * const minutes = Rx.Observable.interval(60 * 1000); |
| * |
| * seconds.timeoutWith(900, minutes) |
| * .subscribe( |
| * value => console.log(value), // After 900ms, will start emitting `minutes`, |
| * // since first value of `seconds` will not arrive fast enough. |
| * err => console.log(err) // Would be called after 900ms in case of `timeout`, |
| * // but here will never be called. |
| * ); |
| * |
| * @param {number|Date} due Number specifying period within which Observable must emit values |
| * or Date specifying before when Observable should complete |
| * @param {Observable<T>} withObservable Observable which will be subscribed if source fails timeout check. |
| * @param {Scheduler} [scheduler] Scheduler controlling when timeout checks occur. |
| * @return {Observable<T>} Observable that mirrors behaviour of source or, when timeout check fails, of an Observable |
| * passed as a second parameter. |
| * @method timeoutWith |
| * @owner Observable |
| */ |
| export function timeoutWith(due, withObservable, scheduler) { |
| if (scheduler === void 0) { |
| scheduler = async; |
| } |
| return function (source) { |
| var absoluteTimeout = isDate(due); |
| var waitFor = absoluteTimeout ? (+due - scheduler.now()) : Math.abs(due); |
| return source.lift(new TimeoutWithOperator(waitFor, absoluteTimeout, withObservable, scheduler)); |
| }; |
| } |
| var TimeoutWithOperator = /*@__PURE__*/ (/*@__PURE__*/ function () { |
| function TimeoutWithOperator(waitFor, absoluteTimeout, withObservable, scheduler) { |
| this.waitFor = waitFor; |
| this.absoluteTimeout = absoluteTimeout; |
| this.withObservable = withObservable; |
| this.scheduler = scheduler; |
| } |
| TimeoutWithOperator.prototype.call = function (subscriber, source) { |
| return source.subscribe(new TimeoutWithSubscriber(subscriber, this.absoluteTimeout, this.waitFor, this.withObservable, this.scheduler)); |
| }; |
| return TimeoutWithOperator; |
| }()); |
| /** |
| * We need this JSDoc comment for affecting ESDoc. |
| * @ignore |
| * @extends {Ignored} |
| */ |
| var TimeoutWithSubscriber = /*@__PURE__*/ (/*@__PURE__*/ function (_super) { |
| __extends(TimeoutWithSubscriber, _super); |
| function TimeoutWithSubscriber(destination, absoluteTimeout, waitFor, withObservable, scheduler) { |
| _super.call(this, destination); |
| this.absoluteTimeout = absoluteTimeout; |
| this.waitFor = waitFor; |
| this.withObservable = withObservable; |
| this.scheduler = scheduler; |
| this.action = null; |
| this.scheduleTimeout(); |
| } |
| TimeoutWithSubscriber.dispatchTimeout = function (subscriber) { |
| var withObservable = subscriber.withObservable; |
| subscriber._unsubscribeAndRecycle(); |
| subscriber.add(subscribeToResult(subscriber, withObservable)); |
| }; |
| TimeoutWithSubscriber.prototype.scheduleTimeout = function () { |
| var action = this.action; |
| if (action) { |
| // Recycle the action if we've already scheduled one. All the production |
| // Scheduler Actions mutate their state/delay time and return themeselves. |
| // VirtualActions are immutable, so they create and return a clone. In this |
| // case, we need to set the action reference to the most recent VirtualAction, |
| // to ensure that's the one we clone from next time. |
| this.action = action.schedule(this, this.waitFor); |
| } |
| else { |
| this.add(this.action = this.scheduler.schedule(TimeoutWithSubscriber.dispatchTimeout, this.waitFor, this)); |
| } |
| }; |
| TimeoutWithSubscriber.prototype._next = function (value) { |
| if (!this.absoluteTimeout) { |
| this.scheduleTimeout(); |
| } |
| _super.prototype._next.call(this, value); |
| }; |
| TimeoutWithSubscriber.prototype._unsubscribe = function () { |
| this.action = null; |
| this.scheduler = null; |
| this.withObservable = null; |
| }; |
| return TimeoutWithSubscriber; |
| }(OuterSubscriber)); |
| //# sourceMappingURL=timeoutWith.js.map |