text: // Copyright (c) 2011 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.
  
  #ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_COMMON_H_
  #define CHROME_BROWSER_UI_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_COMMON_H_
  #pragma once
  
  #include "chrome/browser/ui/webui/options/options_ui.h"
  
  class DictionaryValue;
  class ListValue;
  
  // The base class for language options page UI handlers.  This class has code
  // common to the Chrome OS and non-Chrome OS implementation of the handler.
  class LanguageOptionsHandlerCommon : public OptionsPageUIHandler {
   public:
    LanguageOptionsHandlerCommon();
    virtual ~LanguageOptionsHandlerCommon();
  
    // OptionsPageUIHandler implementation.
    virtual void GetLocalizedValues(DictionaryValue* localized_strings);
  
    // DOMMessageHandler implementation.
    virtual void RegisterMessages();
  
    // The following static methods are public for ease of testing.
  
    // Gets the set of language codes that can be used as UI language.
    // The return value will look like:
    // {'en-US': true, 'fi': true, 'fr': true, ...}
    //
    // Note that true in values does not mean anything. We just use the
    // dictionary as a set.
    static DictionaryValue* GetUILanguageCodeSet();
  
    // Gets the set of language codes that can be used for spellchecking.
    // The return value will look like:
    // {'en-US': true, 'fi': true, 'fr': true, ...}
    //
    // Note that true in values does not mean anything. We just use the
    // dictionary as a set.
    static DictionaryValue* GetSpellCheckLanguageCodeSet();
  
   private:
    // Returns the name of the product (ex. "Chrome" or "Chrome OS").
    virtual string16 GetProductName() = 0;
  
    // Sets the application locale.
    virtual void SetApplicationLocale(const std::string& language_code) = 0;
  
    // Called when the language options is opened.
    void LanguageOptionsOpenCallback(const ListValue* args);
  
    // Called when the UI language is changed.
    // |args| will contain the language code as string (ex. "fr").
    void UiLanguageChangeCallback(const ListValue* args);
  
    // Called when the spell check language is changed.
    // |args| will contain the language code as string (ex. "fr").
    void SpellCheckLanguageChangeCallback(const ListValue* args);
  
    DISALLOW_COPY_AND_ASSIGN(LanguageOptionsHandlerCommon);
  };
  
  #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_COMMON_H_
  