Fixed header bar UI behaviour.

chrome/browser/resources/chromeos/login/display_manager.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview Display manager for WebUI OOBE and login.
  */
 
 // TODO(xiyuan): Find a better to share those constants.
 /** @const */ var SCREEN_OOBE_NETWORK = 'connect';
 /** @const */ var SCREEN_OOBE_EULA = 'eula';
 /** @const */ var SCREEN_OOBE_UPDATE = 'update';
 /** @const */ var SCREEN_OOBE_ENROLLMENT = 'oauth-enrollment';
 /** @const */ var SCREEN_GAIA_SIGNIN = 'gaia-signin';
 /** @const */ var SCREEN_ACCOUNT_PICKER = 'account-picker';
 /** @const */ var SCREEN_ERROR_MESSAGE = 'error-message';
 /** @const */ var SCREEN_USER_IMAGE_PICKER = 'user-image';
 /** @const */ var SCREEN_TPM_ERROR = 'tpm-error-message';
 /** @const */ var SCREEN_PASSWORD_CHANGED = 'password-changed';
 
 /* Accelerator identifiers. Must be kept in sync with webui_login_view.cc. */
 /** @const */ var ACCELERATOR_CANCEL = 'cancel';
 /** @const */ var ACCELERATOR_ENROLLMENT = 'enrollment';
 /** @const */ var ACCELERATOR_VERSION = 'version';
 /** @const */ var ACCELERATOR_RESET = 'reset';
 
 /* Help topic identifiers. */
 /** @const */ var HELP_TOPIC_ENTERPRISE_REPORTING = 2535613;
 
+/* Signin UI state constants. Used to control header bar UI. */
+/** @const */ var SIGNIN_UI_STATE = {
+  HIDDEN: 0,
+  GAIA_SIGNIN: 1,
+  ACCOUNT_PICKER: 2
+};
+
 cr.define('cr.ui.login', function() {
   var Bubble = cr.ui.Bubble;
 
   /**
    * Groups of screens (screen IDs) that should have the same dimensions.
    * @type Array.<Array.<string>>
    * @const
    */
   var SCREEN_GROUPS = [[SCREEN_OOBE_NETWORK,
                         SCREEN_OOBE_EULA,
@@ skipping 479 matching lines @@
   DisplayManager.disableSigninUI = function() {
     $('login-header-bar').disabled = true;
     $('pod-row').disabled = true;
   };
 
   /**
    * Shows signin UI.
    * @param {string} opt_email An optional email for signin UI.
    */
   DisplayManager.showSigninUI = function(opt_email) {
-    $('login-header-bar').signinUIActive = true;
+    var currentScreenId = Oobe.getInstance().currentScreen.id;
+    if (currentScreenId == SCREEN_GAIA_SIGNIN)
+      $('login-header-bar').signinUIState = SIGNIN_UI_STATE.GAIA_SIGNIN;
+    else if (currentScreenId == SCREEN_ACCOUNT_PICKER)
+      $('login-header-bar').signinUIState = SIGNIN_UI_STATE.ACCOUNT_PICKER;
     chrome.send('showAddUser', [opt_email]);
   };
 
   /**
    * Resets sign-in input fields.
    * @param {boolean} forceOnline Whether online sign-in should be forced.
    *     If |forceOnline| is false previously used sign-in type will be used.
    */
   DisplayManager.resetSigninUI = function(forceOnline) {
     var currentScreenId = Oobe.getInstance().currentScreen.id;
@@ skipping 98 matching lines @@
         disable ? 'add' : 'remove']('button-restricted');
     $('add-user-button').title = disable ?
         localStrings.getString('disabledAddUserTooltip') : '';
   }
 
   // Export
   return {
     DisplayManager: DisplayManager
   };
 });