45 lines
1.4 KiB
JavaScript
45 lines
1.4 KiB
JavaScript
|
import { Observable } from '../Observable';
|
||
|
|
import { Subscription } from '../Subscription';
|
||
|
|
import { iterator as Symbol_iterator } from '../symbol/iterator';
|
||
|
|
export function scheduleIterable(input, scheduler) {
|
||
|
|
if (!input) {
|
||
|
|
throw new Error('Iterable cannot be null');
|
||
|
|
}
|
||
|
|
return new Observable(subscriber => {
|
||
|
|
const sub = new Subscription();
|
||
|
|
let iterator;
|
||
|
|
sub.add(() => {
|
||
|
|
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;
|
||
|
|
let done;
|
||
|
|
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;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=scheduleIterable.js.map
|