ChromeOS: Implement Language Selection screen of material design OOBE.

chrome/browser/resources/chromeos/login/oobe_screen_network.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 Oobe network screen implementation.
  */
 
 login.createScreen('NetworkScreen', 'connect', function() {
   var USER_ACTION_CONTINUE_BUTTON_CLICKED = 'continue';
   var USER_ACTION_CONNECT_DEBUGGING_FEATURES_CLICKED =
         'connect-debugging-features';
   var CONTEXT_KEY_LOCALE = 'locale';
   var CONTEXT_KEY_INPUT_METHOD = 'input-method';
   var CONTEXT_KEY_TIMEZONE = 'timezone';
   var CONTEXT_KEY_CONTINUE_BUTTON_ENABLED = 'continue-button-enabled';
 
   return {
     EXTERNAL_API: [
       'showError'
     ],
 
     /**
      * Dropdown element for networks selection.
      */
     dropdown_: null,
 
     /** @override */
     decorate: function() {
-      var self = this;
-
       Oobe.setupSelect($('language-select'),
                        loadTimeData.getValue('languageList'),
-                       function(languageId) {
-                         self.context.set(CONTEXT_KEY_LOCALE, languageId);
-                         self.commitContextChanges();
-                       });
+                       this.onLanguageSelected_.bind(this));
       Oobe.setupSelect($('keyboard-select'),
                        loadTimeData.getValue('inputMethodsList'),
-                       function(inputMethodId) {
-                         self.context.set(CONTEXT_KEY_INPUT_METHOD,
-                                          inputMethodId);
-                         self.commitContextChanges();
-                       });
+                       this.onKeyboardSelected_.bind(this));
       Oobe.setupSelect($('timezone-select'),
                        loadTimeData.getValue('timezoneList'),
-                       function(timezoneId) {
-                         self.context.set(CONTEXT_KEY_TIMEZONE, timezoneId);
-                         self.commitContextChanges();
-                       });
+                       this.onTimezoneSelected_.bind(this));
+
+      // ---------- Welcome screen
+      var welcomeScreen = $('oobe-welcome-md');
+      welcomeScreen.screen = this;
+
+      var languageList = loadTimeData.getValue('languageList');

[michaelpg, 2016/08/04 22:59:28]

this section looks like it's doing the same work that oobe.js does. is this a
different instance of oobe-welcome-md?

[Alexander Alekseev, 2016/08/04 23:06:44]

This is called during initialization.
The code that looks the same in oobe.js is called when language is changed, so
all strings are replaced.

The problem is that the initialization data and updates are different in
structure, that is why we have different implementations.

+      welcomeScreen.languages = languageList;
+      welcomeScreen.currentLanguage = Oobe.getSelectedTitle(languageList);
+
+      var inputMethodsList = loadTimeData.getValue('inputMethodsList');
+      welcomeScreen.keyboards = inputMethodsList;
+      // -------------------------
 
       this.dropdown_ = $('networks-list');
       cr.ui.DropDown.decorate(this.dropdown_);
 
       this.declareUserAction(
           $('connect-debugging-features-link'),
           { action_id: USER_ACTION_CONNECT_DEBUGGING_FEATURES_CLICKED,
             event: 'click'
           });
       this.declareUserAction(
@@ skipping 13 matching lines @@
           });
       this.context.addObserver(CONTEXT_KEY_TIMEZONE, function(timezoneId) {
         $('timezone-select').value = timezoneId;
       });
       this.context.addObserver(CONTEXT_KEY_CONTINUE_BUTTON_ENABLED,
                                function(enabled) {
         $('continue-button').disabled = !enabled;
       });
     },
 
+    onLanguageSelected_: function(languageId) {
+      this.context.set(CONTEXT_KEY_LOCALE, languageId);
+      this.commitContextChanges();
+    },
+
+    onKeyboardSelected_: function(inputMethodId) {
+      this.context.set(CONTEXT_KEY_INPUT_METHOD, inputMethodId);
+      this.commitContextChanges();
+    },
+
+    onTimezoneSelected_: function(timezoneId) {
+      this.context.set(CONTEXT_KEY_TIMEZONE, timezoneId);
+      this.commitContextChanges();
+    },
+
     onBeforeShow: function(data) {
       cr.ui.DropDown.show('networks-list', true, -1);
       this.classList.toggle('connect-debugging-view',
         data && 'isDeveloperMode' in data && data['isDeveloperMode']);
     },
 
     onBeforeHide: function() {
       cr.ui.DropDown.hide('networks-list');
     },
 
@@ skipping 43 matching lines @@
       error.appendChild(messageDiv);
       error.setAttribute('role', 'alert');
 
       $('bubble').showContentForElement($('networks-list'),
                                         cr.ui.Bubble.Attachment.BOTTOM,
                                         error);
     }
   };
 });