From aa4ef3a42c2240b22863c64ba972c08fa9b224f3 Mon Sep 17 00:00:00 2001
From: Johannes Rieken <johannes.rieken@gmail.com>
Date: Wed, 14 Nov 2018 15:50:25 +0100
Subject: [PATCH] only add focus change listener once

---
 .../parts/notifications/notificationsToasts.ts | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/src/vs/workbench/browser/parts/notifications/notificationsToasts.ts b/src/vs/workbench/browser/parts/notifications/notificationsToasts.ts
index bd3e64742eb..a5daf01b9f4 100644
--- a/src/vs/workbench/browser/parts/notifications/notificationsToasts.ts
+++ b/src/vs/workbench/browser/parts/notifications/notificationsToasts.ts
@@ -211,7 +211,10 @@ export class NotificationsToasts extends Themable {
 
 		// Install Timers to Purge Notification
 		let purgeTimeoutHandle: any;
+		let listener: IDisposable;
+
 		const hideAfterTimeout = () => {
+
 			purgeTimeoutHandle = setTimeout(() => {
 
 				// If the notification is sticky or prompting and the window does not have
@@ -220,11 +223,14 @@ export class NotificationsToasts extends Themable {
 				// could immediately hide the notification because the timeout was triggered
 				// again.
 				if ((item.sticky || item.hasPrompt()) && !this.windowHasFocus) {
-					disposables.push(this.windowService.onDidChangeFocus(focus => {
-						if (focus) {
-							hideAfterTimeout();
-						}
-					}));
+					if (!listener) {
+						listener = this.windowService.onDidChangeFocus(focus => {
+							if (focus) {
+								hideAfterTimeout();
+							}
+						});
+						disposables.push(listener);
+					}
 				}
 
 				// Otherwise...
@@ -509,4 +515,4 @@ export class NotificationsToasts extends Themable {
 	private isVisible(toast: INotificationToast): boolean {
 		return !!toast.container.parentElement;
 	}
-}
\ No newline at end of file
+}