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