windowWhen.js
2.25 KB
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import { Subject } from '../Subject';
import { OuterSubscriber } from '../OuterSubscriber';
import { subscribeToResult } from '../util/subscribeToResult';
export function windowWhen(closingSelector) {
return function windowWhenOperatorFunction(source) {
return source.lift(new WindowOperator(closingSelector));
};
}
class WindowOperator {
constructor(closingSelector) {
this.closingSelector = closingSelector;
}
call(subscriber, source) {
return source.subscribe(new WindowSubscriber(subscriber, this.closingSelector));
}
}
class WindowSubscriber extends OuterSubscriber {
constructor(destination, closingSelector) {
super(destination);
this.destination = destination;
this.closingSelector = closingSelector;
this.openWindow();
}
notifyNext(_outerValue, _innerValue, _outerIndex, _innerIndex, innerSub) {
this.openWindow(innerSub);
}
notifyError(error) {
this._error(error);
}
notifyComplete(innerSub) {
this.openWindow(innerSub);
}
_next(value) {
this.window.next(value);
}
_error(err) {
this.window.error(err);
this.destination.error(err);
this.unsubscribeClosingNotification();
}
_complete() {
this.window.complete();
this.destination.complete();
this.unsubscribeClosingNotification();
}
unsubscribeClosingNotification() {
if (this.closingNotification) {
this.closingNotification.unsubscribe();
}
}
openWindow(innerSub = null) {
if (innerSub) {
this.remove(innerSub);
innerSub.unsubscribe();
}
const prevWindow = this.window;
if (prevWindow) {
prevWindow.complete();
}
const window = this.window = new Subject();
this.destination.next(window);
let closingNotifier;
try {
const { closingSelector } = this;
closingNotifier = closingSelector();
}
catch (e) {
this.destination.error(e);
this.window.error(e);
return;
}
this.add(this.closingNotification = subscribeToResult(this, closingNotifier));
}
}
//# sourceMappingURL=windowWhen.js.map