ui/scripts/ui-custom/login.js

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
(function($, cloudStack) {
  /**
   * Login process
   */
  cloudStack.uiCustom.login = function(args) {
    var $container = args.$container;
    var $login = $('#template').find('.login').clone();
    var $form = $login.find('form');
    var $inputs = $form.find('input[type=text], input[type=password]');
    var complete = args.complete;
    var bypass = args.bypassLoginCheck && args.bypassLoginCheck();

    // Check to see if we can bypass login screen
    if (bypass) {
      complete({
        user: bypass.user
      });

      return;
    }

    $login.appendTo('html body');
    $('html body').addClass('login');

    // Remove label if field was auto filled
    $.each($form.find('label'), function() {
      var $label = $(this);
      var $input = $form.find('input').filter(function() {
        return $(this).attr('name') == $label.attr('for');
      });
      if ($input.val()) {
        $label.hide();
      }
    });

    // Form validation
    $form.validate();

    // Form label behavior
    $inputs.bind('keydown focus click blur', function(event) {
      var $target = $(event.target);
      var $label = $form.find('label').filter(function() {
        return $(this).attr('for') == $target.attr('name');
      });

      if (event.type == 'keydown') {
        $label.hide();

        return true;
      } else if (event.type == 'blur') {
        if ($target.hasClass('first-input')) {
          $target.removeClass('first-input');
        }
        if (!$(this).val()) {
          $label.show();
        }
      } else {
        if (!$target.hasClass('first-input')) {
            $label.hide();
        }
      }

      return true;
    });

    if (!args.hasLogo) $login.addClass('nologo');

    // Labels cause related input to be focused
    $login.find('label').click(function() {
      var $input = $inputs.filter('[name=' + $(this).attr('for') + ']');
      var $label = $(this);

      $input.focus();
      $label.hide();
    });

    $inputs.filter(':first').addClass('first-input').focus();

    // Login action
    $login.find('input[type=submit]').click(function() {
      if (!$form.valid()) return false;

      var data = cloudStack.serializeForm($form);

      args.loginAction({
        data: data,
        response: {
          success: function(args) {
            $login.remove();
            $('html body').removeClass('login');
            complete({
              user: args.data.user
            });
          },
          error: function(args) {
            cloudStack.dialog.notice({ message: args });
          }
        }
      });

      return false;
    });

    // Select language
    var $languageSelect = $login.find('select[name=language]');
    $languageSelect.change(function() {
		  if($(this).val() != '') //language dropdown is not blank
        $.cookie('lang', $(this).val()); //the selected option in language dropdown will be used (instead of browser's default language) 
			else //language dropdown is blank
			  $.cookie('lang', null); //null $.cookie('lang'), so browser's default language will be used.
      document.location.reload();
    });
    
    $languageSelect.val($.cookie('lang'));

    // Hide login screen, mainly for SSO
    if (args.hideLoginScreen) {
      $login.children().hide();
      $login.append($('<div>').addClass('loading-overlay').append(
        $('<span>').html(
          // _l is not set yet, so localize directly to dictionary
          // [should fix in future]
          dictionary['label.loading'] + '...'
        )
      ));
    }
  };
})(jQuery, cloudStack);