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node_modules/rxjs/_esm2015/internal/operators/windowWhen.js

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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, innerSub) {
+        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