| import { Observable } from '../Observable'; |
| import { SchedulerLike } from '../types'; |
| import { Subscription } from '../Subscription'; |
| import { iterator as Symbol_iterator } from '../symbol/iterator'; |
| |
| export function scheduleIterable<T>(input: Iterable<T>, scheduler: SchedulerLike) { |
| if (!input) { |
| throw new Error('Iterable cannot be null'); |
| } |
| return new Observable<T>(subscriber => { |
| const sub = new Subscription(); |
| let iterator: Iterator<T>; |
| sub.add(() => { |
| // Finalize generators |
| if (iterator && typeof iterator.return === 'function') { |
| iterator.return(); |
| } |
| }); |
| sub.add(scheduler.schedule(() => { |
| iterator = input[Symbol_iterator](); |
| sub.add(scheduler.schedule(function () { |
| if (subscriber.closed) { |
| return; |
| } |
| let value: T; |
| let done: boolean; |
| try { |
| const result = iterator.next(); |
| value = result.value; |
| done = result.done; |
| } catch (err) { |
| subscriber.error(err); |
| return; |
| } |
| if (done) { |
| subscriber.complete(); |
| } else { |
| subscriber.next(value); |
| this.schedule(); |
| } |
| })); |
| })); |
| return sub; |
| }); |
| } |