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// Copyright (c) 2009 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 <map>
#include <string>
#include <vector>

#include "app/combobox_model.h"
#include "base/basictypes.h"

class Profile;

// LanguageList
//  Provides code to enumerate locale names for language selection lists.
//  To be used by combobox, menu or other models.
class LanguageList {
  struct LocaleData {
    LocaleData() { }
    LocaleData(const std::wstring& name, const std::string& code)
        : native_name(name), locale_code(code) { }

    std::wstring native_name;
    std::string locale_code;  // E.g., en-us.
  typedef std::map<std::wstring, LocaleData> LocaleDataMap;


  explicit LanguageList(const std::vector<std::string>& locale_codes);

  virtual ~LanguageList() {}

  // Duplicates specified languages at the beginning of the list for
  // easier access.
  void CopySpecifiedLanguagesUp(const std::string& locale_codes);

  int get_languages_count() const;

  std::wstring GetLanguageNameAt(int index) const;

  // Return the locale for the given index.  E.g., may return pt-BR.
  std::string GetLocaleFromIndex(int index) const;

  // Returns the index for the given locale.  Returns -1 if the locale is not
  // in the combobox model.
  int GetIndexFromLocale(const std::string& locale) const;

  // The names of 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_;

  void InitNativeNames(const std::vector<std::string>& locale_codes);


// LanguageComboboxModel
//  The combobox model implementation.
class LanguageComboboxModel : public LanguageList, public ComboboxModel {

  // Temporary compatibility constructor.
  LanguageComboboxModel(Profile* profile,
                        const std::vector<std::string>& locale_codes);

  virtual ~LanguageComboboxModel() {}

  virtual int GetItemCount() { return get_languages_count(); }

  virtual std::wstring GetItemAt(int index) { return GetLanguageNameAt(index); }

  // 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);

  // Profile.
  Profile* profile_;



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