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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef CHROME_BROWSER_VIEWS_OPTIONS_LANGUAGE_COMBOBOX_MODEL_H__
+#define CHROME_BROWSER_VIEWS_OPTIONS_LANGUAGE_COMBOBOX_MODEL_H__
+
+#include "chrome/browser/profile.h"
+#include "chrome/views/combo_box.h"
+
+///////////////////////////////////////////////////////////////////////////////
+// LanguageComboboxModel
+//  The model that fills the dropdown of valid UI languages.
+class LanguageComboboxModel : public ChromeViews::ComboBox::Model {
+ public:
+  struct LocaleData {
+    LocaleData() { }
+    LocaleData(const std::wstring& name, const std::wstring& code)
+        : native_name(name), locale_code(code) { }
+
+    std::wstring native_name;
+    std::wstring locale_code;  // E.g., en-us.
+  };
+  typedef std::map<std::wstring, LocaleData> LocaleDataMap;
+
+  LanguageComboboxModel();
+
+  // Overload using a profile and customized local_codes vector.
+  LanguageComboboxModel(Profile* profile,
+                        const std::vector<std::wstring>& locale_codes);
+
+  virtual ~LanguageComboboxModel() {}
+
+  void InitNativeNames(const std::vector<std::wstring>& locale_codes);
+
+  // Overridden from ChromeViews::Combobox::Model:
+  virtual int GetItemCount(ChromeViews::ComboBox* source);
+
+  virtual std::wstring GetItemAt(ChromeViews::ComboBox* source, int index);
+
+  // Return the locale for the given index.  E.g., may return pt-BR.
+  std::wstring GetLocaleFromIndex(int index);
+
+  // Returns the index for the given locale.  Returns -1 if the locale is not
+  // in the combobox model.
+  int GetIndexFromLocale(const std::wstring& locale);
+
+  // Returns the index of the language currently specified in the user's
+  // preference file.  Note that it's possible for language A to be picked
+  // while chrome is currently in language B if the user specified language B
+  // via --lang.  Since --lang is not a persistent setting, it seems that it
+  // shouldn't be reflected in this combo box.  We return -1 if the value in
+  // the pref doesn't map to a know language (possible if the user edited the
+  // prefs file manually).
+  int GetSelectedLanguageIndex(const std::wstring& prefs);
+
+ private:
+  // The name all the locales in the current application locale.
+  std::vector<std::wstring> locale_names_;
+
+  // A map of some extra data (LocaleData) keyed off the name of the locale.
+  LocaleDataMap native_names_;
+
+  // Profile.
+  Profile* profile_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(LanguageComboboxModel);
+};
+
+#endif  // #ifndef CHROME_BROWSER_VIEWS_OPTIONS_LANGUAGE_COMBOBOX_MODEL_H__