From e3e3727e45bedf7d0c5f7d87ac6053013beecefd Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Tue, 8 Mar 2016 14:12:54 +0100
Subject: [PATCH] Added reliable checks for common key presses

---
 .../install/files/js/WoltLab/WCF/Event/Key.js | 85 +++++++++++++++++++
 wcfsetup/install/files/js/require.config.js   |  1 +
 2 files changed, 86 insertions(+)
 create mode 100644 wcfsetup/install/files/js/WoltLab/WCF/Event/Key.js

diff --git a/wcfsetup/install/files/js/WoltLab/WCF/Event/Key.js b/wcfsetup/install/files/js/WoltLab/WCF/Event/Key.js
new file mode 100644
index 0000000000..3467e48e29
--- /dev/null
+++ b/wcfsetup/install/files/js/WoltLab/WCF/Event/Key.js
@@ -0,0 +1,85 @@
+/**
+ * Provides reliable checks for common key presses, uses `Event.key` on supported browsers
+ * or the deprecated `Event.which`.
+ * 
+ * @author	Alexander Ebert
+ * @copyright	2001-2016 WoltLab GmbH
+ * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @module	WoltLab/WCF/Event/Key
+ */
+define([], function() {
+	"use strict";
+	
+	function _isKey(event, key, which) {
+		if (!(event instanceof Event)) {
+			throw new TypeError("Expected a valid event when testing for key '" + key + "'.");
+		}
+		
+		return event.key === key || event.which === which;
+	}
+	
+	/**
+	 * @exports     WoltLab/WCF/Event/Key
+	 */
+	return {
+		/**
+		 * Returns true if pressed key equals 'ArrowDown'.
+		 * 
+		 * @param       {Event}         event           event object
+		 * @return      {boolean}
+		 */
+		ArrowDown: function(event) {
+			return _isKey(event, 'ArrowDown', 40);
+		},
+		
+		/**
+		 * Returns true if pressed key equals 'ArrowLeft'.
+		 * 
+		 * @param       {Event}         event           event object
+		 * @return      {boolean}
+		 */
+		ArrowLeft: function(event) {
+			return _isKey(event, 'ArrowLeft', 37);
+		},
+		
+		/**
+		 * Returns true if pressed key equals 'ArrowRight'.
+		 * 
+		 * @param       {Event}         event           event object
+		 * @return      {boolean}
+		 */
+		ArrowRight: function(event) {
+			return _isKey(event, 'ArrowRight', 39);
+		},
+		
+		/**
+		 * Returns true if pressed key equals 'ArrowUp'.
+		 * 
+		 * @param       {Event}         event           event object
+		 * @return      {boolean}
+		 */
+		ArrowUp: function(event) {
+			return _isKey(event, 'ArrowUp', 38);
+		},
+		
+		/**
+		 * Returns true if pressed key equals 'Enter'.
+		 * 
+		 * @param       {Event}         event           event object
+		 * @return      {boolean}
+		 */
+		Enter: function(event) {
+			return _isKey(event, 'Enter', 13);
+		},
+		
+		/**
+		 * Returns true if pressed key equals 'Escape'.
+		 * 
+		 * @param       {Event}         event           event object
+		 * @return      {boolean}
+		 */
+		Escape: function(event) {
+			return _isKey(event, 'Escape', 27);
+		}
+	};
+});
diff --git a/wcfsetup/install/files/js/require.config.js b/wcfsetup/install/files/js/require.config.js
index 0d2d54dd59..88110584a9 100644
--- a/wcfsetup/install/files/js/require.config.js
+++ b/wcfsetup/install/files/js/require.config.js
@@ -23,6 +23,7 @@ requirejs.config({
 			'Dom/Util': 'WoltLab/WCF/Dom/Util',
 			'Environment': 'WoltLab/WCF/Environment',
 			'EventHandler': 'WoltLab/WCF/Event/Handler',
+			'EventKey': 'WoltLab/WCF/Event/Key',
 			'Language': 'WoltLab/WCF/Language',
 			'List': 'WoltLab/WCF/List',
 			'ObjectMap': 'WoltLab/WCF/ObjectMap',
-- 
2.20.1