windowWhen.js
1.53 KB
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import { Subject } from '../Subject';
import { operate } from '../util/lift';
import { createOperatorSubscriber } from './OperatorSubscriber';
import { innerFrom } from '../observable/innerFrom';
export function windowWhen(closingSelector) {
return operate((source, subscriber) => {
let window;
let closingSubscriber;
const handleError = (err) => {
window.error(err);
subscriber.error(err);
};
const openWindow = () => {
closingSubscriber === null || closingSubscriber === void 0 ? void 0 : closingSubscriber.unsubscribe();
window === null || window === void 0 ? void 0 : window.complete();
window = new Subject();
subscriber.next(window.asObservable());
let closingNotifier;
try {
closingNotifier = innerFrom(closingSelector());
}
catch (err) {
handleError(err);
return;
}
closingNotifier.subscribe((closingSubscriber = createOperatorSubscriber(subscriber, openWindow, openWindow, handleError)));
};
openWindow();
source.subscribe(createOperatorSubscriber(subscriber, (value) => window.next(value), () => {
window.complete();
subscriber.complete();
}, handleError, () => {
closingSubscriber === null || closingSubscriber === void 0 ? void 0 : closingSubscriber.unsubscribe();
window = null;
}));
});
}
//# sourceMappingURL=windowWhen.js.map