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      1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_LANGUAGE_COMBOBOX_MODEL_H_
      6 #define CHROME_BROWSER_LANGUAGE_COMBOBOX_MODEL_H_
      7 #pragma once
      8 
      9 #include <map>
     10 #include <string>
     11 #include <vector>
     12 
     13 #include "base/basictypes.h"
     14 #include "base/string16.h"
     15 #include "ui/base/models/combobox_model.h"
     16 
     17 class Profile;
     18 
     19 ///////////////////////////////////////////////////////////////////////////////
     20 // LanguageList
     21 //  Provides code to enumerate locale names for language selection lists.
     22 //  To be used by combobox, menu or other models.
     23 class LanguageList {
     24  public:
     25   struct LocaleData {
     26     LocaleData() { }
     27     LocaleData(const string16& name, const std::string& code)
     28         : native_name(name), locale_code(code) { }
     29 
     30     string16 native_name;
     31     std::string locale_code;  // E.g., en-us.
     32   };
     33   typedef std::map<string16, LocaleData> LocaleDataMap;
     34 
     35   LanguageList();
     36 
     37   explicit LanguageList(const std::vector<std::string>& locale_codes);
     38 
     39   virtual ~LanguageList();
     40 
     41   // Duplicates specified languages at the beginning of the list for
     42   // easier access.
     43   void CopySpecifiedLanguagesUp(const std::string& locale_codes);
     44 
     45   int get_languages_count() const;
     46 
     47   string16 GetLanguageNameAt(int index) const;
     48 
     49   // Return the locale for the given index.  E.g., may return pt-BR.
     50   std::string GetLocaleFromIndex(int index) const;
     51 
     52   // Returns the index for the given locale.  Returns -1 if the locale is not
     53   // in the combobox model.
     54   int GetIndexFromLocale(const std::string& locale) const;
     55 
     56  private:
     57   // The names of all the locales in the current application locale.
     58   std::vector<string16> locale_names_;
     59 
     60   // A map of some extra data (LocaleData) keyed off the name of the locale.
     61   LocaleDataMap native_names_;
     62 
     63   void InitNativeNames(const std::vector<std::string>& locale_codes);
     64 
     65   DISALLOW_COPY_AND_ASSIGN(LanguageList);
     66 };
     67 
     68 ///////////////////////////////////////////////////////////////////////////////
     69 // LanguageComboboxModel
     70 //  The combobox model implementation.
     71 class LanguageComboboxModel : public LanguageList, public ui::ComboboxModel {
     72  public:
     73   LanguageComboboxModel();
     74 
     75   // Temporary compatibility constructor.
     76   LanguageComboboxModel(Profile* profile,
     77                         const std::vector<std::string>& locale_codes);
     78 
     79   virtual ~LanguageComboboxModel();
     80 
     81   virtual int GetItemCount();
     82   virtual string16 GetItemAt(int index);
     83 
     84   // Returns the index of the language currently specified in the user's
     85   // preference file.  Note that it's possible for language A to be picked
     86   // while chrome is currently in language B if the user specified language B
     87   // via --lang.  Since --lang is not a persistent setting, it seems that it
     88   // shouldn't be reflected in this combo box.  We return -1 if the value in
     89   // the pref doesn't map to a know language (possible if the user edited the
     90   // prefs file manually).
     91   int GetSelectedLanguageIndex(const std::string& prefs);
     92 
     93  private:
     94   // Profile.
     95   Profile* profile_;
     96 
     97   DISALLOW_COPY_AND_ASSIGN(LanguageComboboxModel);
     98 };
     99 
    100 #endif  // CHROME_BROWSER_LANGUAGE_COMBOBOX_MODEL_H_
    101