timeoutWith.ts
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import { Operator } from '../Operator';
import { Subscriber } from '../Subscriber';
import { Scheduler } from '../Scheduler';
import { async } from '../scheduler/async';
import { Subscription, TeardownLogic } from '../Subscription';
import { Observable, ObservableInput } from '../Observable';
import { isDate } from '../util/isDate';
import { OuterSubscriber } from '../OuterSubscriber';
import { subscribeToResult } from '../util/subscribeToResult';
/* tslint:disable:max-line-length */
export function timeoutWith<T>(this: Observable<T>, due: number | Date, withObservable: ObservableInput<T>, scheduler?: Scheduler): Observable<T>;
export function timeoutWith<T, R>(this: Observable<T>, due: number | Date, withObservable: ObservableInput<R>, scheduler?: Scheduler): Observable<T | R>;
/* tslint:disable:max-line-length */
/**
* @param due
* @param withObservable
* @param scheduler
* @return {Observable<R>|WebSocketSubject<T>|Observable<T>}
* @method timeoutWith
* @owner Observable
*/
export function timeoutWith<T, R>(this: Observable<T>, due: number | Date,
withObservable: ObservableInput<R>,
scheduler: Scheduler = async): Observable<T | R> {
let absoluteTimeout = isDate(due);
let waitFor = absoluteTimeout ? (+due - scheduler.now()) : Math.abs(<number>due);
return this.lift(new TimeoutWithOperator(waitFor, absoluteTimeout, withObservable, scheduler));
}
class TimeoutWithOperator<T> implements Operator<T, T> {
constructor(private waitFor: number,
private absoluteTimeout: boolean,
private withObservable: ObservableInput<any>,
private scheduler: Scheduler) {
}
call(subscriber: Subscriber<T>, source: any): TeardownLogic {
return source.subscribe(new TimeoutWithSubscriber(
subscriber, this.absoluteTimeout, this.waitFor, this.withObservable, this.scheduler
));
}
}
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
class TimeoutWithSubscriber<T, R> extends OuterSubscriber<T, R> {
private timeoutSubscription: Subscription = undefined;
private index: number = 0;
private _previousIndex: number = 0;
get previousIndex(): number {
return this._previousIndex;
}
private _hasCompleted: boolean = false;
get hasCompleted(): boolean {
return this._hasCompleted;
}
constructor(public destination: Subscriber<T>,
private absoluteTimeout: boolean,
private waitFor: number,
private withObservable: ObservableInput<any>,
private scheduler: Scheduler) {
super();
destination.add(this);
this.scheduleTimeout();
}
private static dispatchTimeout(state: any): void {
const source = state.subscriber;
const currentIndex = state.index;
if (!source.hasCompleted && source.previousIndex === currentIndex) {
source.handleTimeout();
}
}
private scheduleTimeout(): void {
let currentIndex = this.index;
const timeoutState = { subscriber: this, index: currentIndex };
this.scheduler.schedule(TimeoutWithSubscriber.dispatchTimeout, this.waitFor, timeoutState);
this.index++;
this._previousIndex = currentIndex;
}
protected _next(value: T) {
this.destination.next(value);
if (!this.absoluteTimeout) {
this.scheduleTimeout();
}
}
protected _error(err: any) {
this.destination.error(err);
this._hasCompleted = true;
}
protected _complete() {
this.destination.complete();
this._hasCompleted = true;
}
handleTimeout(): void {
if (!this.closed) {
const withObservable = this.withObservable;
this.unsubscribe();
this.destination.add(this.timeoutSubscription = subscribeToResult(this, withObservable));
}
}
}