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- import { SchedulerLike, SchedulerAction } from '../types';
- import { Subscriber } from '../Subscriber';
- import { Subscription } from '../Subscription';
- import { Observable } from '../Observable';
- import { asap } from '../scheduler/asap';
- import { isNumeric } from '../util/isNumeric';
- export interface DispatchArg<T> {
- source: Observable<T>;
- subscriber: Subscriber<T>;
- }
- /**
- * We need this JSDoc comment for affecting ESDoc.
- * @extends {Ignored}
- * @hide true
- */
- export class SubscribeOnObservable<T> extends Observable<T> {
- /** @nocollapse */
- static create<T>(source: Observable<T>, delay: number = 0, scheduler: SchedulerLike = asap): Observable<T> {
- return new SubscribeOnObservable(source, delay, scheduler);
- }
- /** @nocollapse */
- static dispatch<T>(this: SchedulerAction<T>, arg: DispatchArg<T>): Subscription {
- const { source, subscriber } = arg;
- return this.add(source.subscribe(subscriber));
- }
- constructor(public source: Observable<T>,
- private delayTime: number = 0,
- private scheduler: SchedulerLike = asap) {
- super();
- if (!isNumeric(delayTime) || delayTime < 0) {
- this.delayTime = 0;
- }
- if (!scheduler || typeof scheduler.schedule !== 'function') {
- this.scheduler = asap;
- }
- }
- /** @deprecated This is an internal implementation detail, do not use. */
- _subscribe(subscriber: Subscriber<T>) {
- const delay = this.delayTime;
- const source = this.source;
- const scheduler = this.scheduler;
- return scheduler.schedule<DispatchArg<any>>(SubscribeOnObservable.dispatch, delay, {
- source, subscriber
- });
- }
- }
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