From: Alexander Ebert <ebert@woltlab.com>
Date: Fri, 11 Aug 2017 09:44:21 +0000 (+0200)
Subject: Fixed excessive polling behavior
X-Git-Tag: 3.1.0_Alpha_1~44
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6f3715426a95bd3ffdf19137e990d75b9f6b7196;p=GitHub%2FWoltLab%2FWCF.git

Fixed excessive polling behavior
---

diff --git a/wcfsetup/install/files/js/WoltLabSuite/Core/Notification/Handler.js b/wcfsetup/install/files/js/WoltLabSuite/Core/Notification/Handler.js
index b600007dc3..46b33b4599 100644
--- a/wcfsetup/install/files/js/WoltLabSuite/Core/Notification/Handler.js
+++ b/wcfsetup/install/files/js/WoltLabSuite/Core/Notification/Handler.js
@@ -49,7 +49,7 @@ define(['Ajax', 'Core', 'EventHandler'], function(Ajax, Core, EventHandler) {
 			document.addEventListener('visibilitychange', this._onVisibilityChange.bind(this));
 			window.addEventListener('storage', this._onStorage.bind(this));
 			
-			this._onVisibilityChange();
+			this._onVisibilityChange(null);
 			
 			if (options.enableNotifications) {
 				switch (window.Notification.permission) {
@@ -70,19 +70,20 @@ define(['Ajax', 'Core', 'EventHandler'], function(Ajax, Core, EventHandler) {
 		/**
 		 * Detects when this window is hidden or restored.
 		 * 
+		 * @param       {Event}         event
 		 * @protected
 		 */
-		_onVisibilityChange: function() {
-			_inactiveSince = (document.hidden) ? Date.now() : 0;
-			
+		_onVisibilityChange: function(event) {
 			// document was hidden before
-			if (!document.hidden) {
+			if (event !== null && !document.hidden) {
 				var difference = (Date.now() - _inactiveSince) / 60000;
 				if (difference > 4) {
 					this._resetTimer();
 					this._dispatchRequest();
 				}
 			}
+			
+			_inactiveSince = (document.hidden) ? Date.now() : 0;
 		},
 		
 		/**