isolated script scope

js/gamepad.js

@@ -1,18 +1,19 @@
-$.urlParam = function(name) {
+(function(window, document, undefined) {
+    $.urlParam = function(name) {
         var results = new RegExp('[\?&]' + name + '=([^&#]*)').exec(window.location.href);
         if (results === null) {
            return null;
         } else {
            return decodeURIComponent(results[1]) || 0;
         }
-};
+    };
 
-var haveEvents = 'ongamepadconnected' in window;
-var gamepads = {};
-var $gamepad = $('.gamepad');
-var $nogamepad = $('.no-gamepad');
-var $help = $('.help');
-var gamepadIdentifiers = {
+    var haveEvents = 'ongamepadconnected' in window;
+    var gamepads = {};
+    var $gamepad = $('.gamepad');
+    var $nogamepad = $('.no-gamepad');
+    var $help = $('.help');
+    var gamepadIdentifiers = {
         'ds4': {
             'id': /054c.*?05c4/,
             'colors': ['black', 'white', 'red', 'blue']
@@ -21,44 +22,44 @@ var gamepadIdentifiers = {
             'id': /xinput|XInput/,
             'colors': ['black', 'white']
         }
-};
-var gamepadHelpTimeout = null;
-var gamepadHelpDelay = 10000;
-var activeGamepadIndex = null;
-var activeGamepadType = null;
-var activeGamepadIdentifier = null;
-var activeGamepadColorIndex = null;
-var activeGamepadColorName = null;
-var activeGamepadZoomLevel = 1;
-var mapping = {
+    };
+    var gamepadHelpTimeout = null;
+    var gamepadHelpDelay = 10000;
+    var activeGamepadIndex = null;
+    var activeGamepadType = null;
+    var activeGamepadIdentifier = null;
+    var activeGamepadColorIndex = null;
+    var activeGamepadColorName = null;
+    var activeGamepadZoomLevel = 1;
+    var mapping = {
         buttons: [],
         axes: []
-};
+    };
 
-window.addEventListener("gamepadconnected", onGamepadConnect);
-window.addEventListener("gamepaddisconnected", onGamepadDisconnect);
-window.addEventListener("keydown", onKeyDown);
+    window.addEventListener("gamepadconnected", onGamepadConnect);
+    window.addEventListener("gamepaddisconnected", onGamepadDisconnect);
+    window.addEventListener("keydown", onKeyDown);
 
-displayGamepadHelp();
-function displayGamepadHelp() {
+    displayGamepadHelp();
+    function displayGamepadHelp() {
         gamepadHelpTimeout = window.setTimeout(function() {
             $nogamepad.fadeIn();
         }, gamepadHelpDelay);
-}
-function hideGamepadHelp() {
+    }
+    function hideGamepadHelp() {
         window.clearTimeout(gamepadHelpTimeout);
         $nogamepad.hide();
-}
+    }
 
-function onGamepadConnect(e) {
+    function onGamepadConnect(e) {
         addGamepad(e.gamepad);
-}
+    }
 
-function onGamepadDisconnect(e) {
+    function onGamepadDisconnect(e) {
         removeGamepad(e.gamepad.index);
-}
+    }
 
-function onKeyDown(e) {
+    function onKeyDown(e) {
         switch (e.code) {
             case "Delete":
             case "Escape":
@@ -83,17 +84,17 @@ function onKeyDown(e) {
                 changeZoom("0");
                 break;
         }
-}
+    }
 
-function getGamepads() {
+    function getGamepads() {
         return navigator.getGamepads ? navigator.getGamepads() : (navigator.webkitGetGamepads ? navigator.webkitGetGamepads() : []);
-}
+    }
 
-function addGamepad(gamepad) {
+    function addGamepad(gamepad) {
         gamepads[gamepad.index] = gamepad;
-}
+    }
 
-function removeGamepad(gamepadIndex) {
+    function removeGamepad(gamepadIndex) {
         if (gamepadIndex === activeGamepadIndex) {
             activeGamepadIndex = null;
             $gamepad.empty();
@@ -101,10 +102,10 @@ function removeGamepad(gamepadIndex) {
         delete gamepads[gamepadIndex];
 
         displayGamepadHelp();
-}
+    }
 
-setInterval(scanGamepads, 500);
-function scanGamepads() {
+    setInterval(scanGamepads, 500);
+    function scanGamepads() {
         if (null !== activeGamepadIndex) {
             return;
         }
@@ -125,9 +126,9 @@ function scanGamepads() {
                 }
             }
         }
-}
+    }
 
-function mapGamepad(gamepad) {
+    function mapGamepad(gamepad) {
         var button;
         var axis;
 
@@ -178,9 +179,9 @@ function mapGamepad(gamepad) {
 
             updateVisualStatus();
         });
-}
+    }
 
-function updateVisualStatus() {
+    function updateVisualStatus() {
         if (null === activeGamepadIndex) {
             return;
         }
@@ -236,9 +237,9 @@ function updateVisualStatus() {
                 updateAxis($axis);
             }
         }
-}
+    }
 
-function changeGamepadColor(gamepadColor) {
+    function changeGamepadColor(gamepadColor) {
         if (! activeGamepadIdentifier) {
             return;
         }
@@ -267,9 +268,9 @@ function changeGamepadColor(gamepadColor) {
         }
 
         $gamepad.attr('data-color', activeGamepadColorName);
-}
+    }
 
-function changeZoom(zoomLevel) {
+    function changeZoom(zoomLevel) {
         if (! activeGamepadIdentifier) {
             return;
         }
@@ -295,8 +296,9 @@ function changeZoom(zoomLevel) {
         activeGamepadZoomLevel = +activeGamepadZoomLevel.toFixed(1);
 
         $gamepad.css('transform', 'translate(-50%, -50%) scale(' + activeGamepadZoomLevel + ', ' + activeGamepadZoomLevel + ')');
-}
+    }
 
-function toggleHelp(zoomLevel) {
+    function toggleHelp(zoomLevel) {
         $help.toggleClass('active');
-}
+    }
+})(window, document);