GUACAMOLE-55: Automatically fire guacClipboard events from index controller when local clipboard has changed.

guacamole/src/main/webapp/app/index/controllers/indexController.js

@@ -26,6 +26,7 @@ angular.module('index').controller('indexController', ['$scope', '$injector',
     // Required services
     var $document        = $injector.get('$document');
     var $window          = $injector.get('$window');
+    var clipboardService = $injector.get('clipboardService');
     var guacNotification = $injector.get('guacNotification');
     
     /**
@@ -124,6 +125,28 @@ angular.module('index').controller('indexController', ['$scope', '$injector',
         keyboard.reset();
     };
 
+    /**
+     * Checks whether the clipboard data has changed, firing a new
+     * "guacClipboard" event if it has.
+     */
+    var checkClipboard = function checkClipboard() {
+        clipboardService.getLocalClipboard().then(function clipboardRead(data) {
+            $scope.$broadcast('guacClipboard', data);
+        });
+    };
+
+    // Attempt to read the clipboard if it may have changed
+    $window.addEventListener('load',  checkClipboard, true);
+    $window.addEventListener('copy',  checkClipboard, true);
+    $window.addEventListener('cut',   checkClipboard, true);
+    $window.addEventListener('focus', function focusGained(e) {
+
+        // Only recheck clipboard if it's the window itself that gained focus
+        if (e.target === $window)
+            checkClipboard();
+
+    }, true);
+
     // Display login screen if a whole new set of credentials is needed
     $scope.$on('guacInvalidCredentials', function loginInvalid(event, parameters, error) {
         $scope.page.title = 'APP.NAME';

guacamole/src/main/webapp/app/index/indexModule.js

@@ -23,6 +23,7 @@
 angular.module('index', [
     'auth',
     'client',
+    'clipboard',
     'home',
     'login',
     'manage',