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+// 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_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_COMMON_H_
+#define CHROME_BROWSER_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_COMMON_H_
+#pragma once
+
+#include "chrome/browser/dom_ui/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();
+
+ // OptionsUIHandler 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(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_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_COMMON_H_