Implement "Display Chrome OS in this language" button.

chrome/browser/chromeos/dom_ui/language_options_handler.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/chromeos/dom_ui/language_options_handler.h"
 
 #include "app/l10n_util.h"
+#include "base/utf_string_conversions.h"
 #include "base/values.h"
-#include "base/utf_string_conversions.h"
+#include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/input_method_library.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
+#include "chrome/browser/pref_service.h"
+#include "chrome/common/pref_names.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 
 LanguageOptionsHandler::LanguageOptionsHandler() {
 }
 
 LanguageOptionsHandler::~LanguageOptionsHandler() {
 }
 
 void LanguageOptionsHandler::GetLocalizedValues(
@@ skipping 14 matching lines @@
   localized_strings->SetString(L"others",
       l10n_util::GetString(IDS_OPTIONS_SETTINGS_LANGUAGES_OTHERS));
   localized_strings->SetString(L"is_displayed_in_this_language",
       l10n_util::GetStringF(
           IDS_OPTIONS_SETTINGS_LANGUAGES_IS_DISPLAYED_IN_THIS_LANGUAGE,
           l10n_util::GetString(IDS_PRODUCT_OS_NAME)));
   localized_strings->SetString(L"display_in_this_language",
       l10n_util::GetStringF(
           IDS_OPTIONS_SETTINGS_LANGUAGES_DISPLAY_IN_THIS_LANGUAGE,
           l10n_util::GetString(IDS_PRODUCT_OS_NAME)));
+  localized_strings->SetString(L"restart_required",
+      l10n_util::GetString(IDS_OPTIONS_RESTART_REQUIRED));
 
+  // The followigns are resources, rather than local strings.
+  localized_strings->SetString(L"currentUiLanguageCode",
+      UTF8ToWide(g_browser_process->GetApplicationLocale()));
   localized_strings->Set(L"inputMethodList", GetInputMethodList());
   localized_strings->Set(L"languageList", GetLanguageList());
 }
 
+void LanguageOptionsHandler::RegisterMessages() {
+  DCHECK(dom_ui_);
+  dom_ui_->RegisterMessageCallback("uiLanguageChange",
+      NewCallback(this,
+                  &LanguageOptionsHandler::UiLanguageChangeCallback));
+}
+
 ListValue* LanguageOptionsHandler::GetInputMethodList() {
   using chromeos::CrosLibrary;
 
   ListValue* input_method_list = new ListValue();
 
   // GetSupportedLanguages() never return NULL.
   scoped_ptr<chromeos::InputMethodDescriptors> descriptors(
       CrosLibrary::Get()->GetInputMethodLibrary()->GetSupportedInputMethods());
   for (size_t i = 0; i < descriptors->size(); ++i) {
     const chromeos::InputMethodDescriptor& descriptor = descriptors->at(i);
@@ skipping 19 matching lines @@
   for (size_t i = 0; i < locales.size(); ++i) {
     DictionaryValue* dictionary = new DictionaryValue();
     dictionary->SetString(L"code", UTF8ToWide(locales[i]));
     dictionary->SetString(L"displayName",
         chromeos::input_method::GetLanguageDisplayNameFromCode(locales[i]));
     language_list->Append(dictionary);
   }
 
   return language_list;
 }
+
+void LanguageOptionsHandler::UiLanguageChangeCallback(
+    const Value* value) {
+  if (!value || !value->IsType(Value::TYPE_LIST)) {
+    NOTREACHED();
+    LOG(INFO) << "NOTREACHED";
+    return;
+  }
+  const ListValue* list_value = static_cast<const ListValue*>(value);
+  std::string language_code;
+  if (list_value->GetSize() != 1 ||
+      !list_value->GetString(0, &language_code)) {
+    NOTREACHED();
+    LOG(INFO) << "NOTREACHED";
+    return;
+  }
+  PrefService* prefs = g_browser_process->local_state();
+  prefs->SetString(prefs::kApplicationLocale, language_code);
+  prefs->SavePersistentPrefs();
+  dom_ui_->CallJavascriptFunction(
+      L"options.LanguageOptions.uiLanguageSaved");
+}