GUACAMOLE-302: Additions are made to the login directive so that the appropriate field that needs to be focussed is determined.

guacamole/src/main/webapp/app/login/directives/login.js

@@ -102,6 +102,13 @@ angular.module('login').directive('guacLogin', [function guacLogin() {
          */
         $scope.submitted = false;
 
+        /**
+         * The field that is most relevant to the user.
+         *
+         * @type Field
+         */
+        $scope.relevantField = null;
+
         /**
          * Returns whether a previous login attempt is continuing.
          *
@@ -144,6 +151,8 @@ angular.module('login').directive('guacLogin', [function guacLogin() {
                     $scope.enteredValues[field.name] = '';
             });
 
+            console.log(mostRelevantField());
+
         });
 
         /**
@@ -194,12 +203,35 @@ angular.module('login').directive('guacLogin', [function guacLogin() {
                             delete $scope.enteredValues[field.name];
 
                     });
+
+                    console.log(mostRelevantField());
                 }
 
             }));
 
         };
 
+        /**
+         * Returns the field most relevant field to the user given the current
+         * state of the login process. This will normally be the first empty
+         * field.
+         *
+         * @return {Field}
+         *     The field most relevant, null if there is no single most relevant
+         *     field.
+         */
+        var mostRelevantField = function findMostRelevantField() {
+
+            for (var i = 0; i < $scope.remainingFields.length; i++) {
+                var field = $scope.remainingFields[i];
+                if (!$scope.enteredValues[field.name])
+                    return field;
+            }
+
+            return null;
+
+        };
+
         // Reset state after authentication and routing have succeeded
         $rootScope.$on('$routeChangeSuccess', function routeChanged() {
             $scope.enteredValues = {};