chrome/browser/ui/webui/options/language_options_handler_common.h

   1 // Copyright (c) 2012 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_UI_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_COMMON_H_
   6 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_COMMON_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9 #include "chrome/browser/spellchecker/spellcheck_hunspell_dictionary.h"
  10 #include "chrome/browser/ui/webui/options/options_ui.h"
  11
  12 namespace base {
  13 class DictionaryValue;
  14 class ListValue;
  15 }
  16
  17 namespace options {
  18
  19 // The base class for language options page UI handlers.  This class has code
  20 // common to the Chrome OS and non-Chrome OS implementation of the handler.
  21 class LanguageOptionsHandlerCommon
  22     : public OptionsPageUIHandler,
  23       public SpellcheckHunspellDictionary::Observer {
  24  public:
  25   LanguageOptionsHandlerCommon();
  26   virtual ~LanguageOptionsHandlerCommon();
  27
  28   // OptionsPageUIHandler implementation.
  29   virtual void GetLocalizedValues(
  30       base::DictionaryValue* localized_strings) OVERRIDE;
  31   virtual void Uninitialize() OVERRIDE;
  32
  33   // DOMMessageHandler implementation.
  34   virtual void RegisterMessages() OVERRIDE;
  35
  36   // SpellcheckHunspellDictionary::Observer implementation.
  37   virtual void OnHunspellDictionaryInitialized() OVERRIDE;
  38   virtual void OnHunspellDictionaryDownloadBegin() OVERRIDE;
  39   virtual void OnHunspellDictionaryDownloadSuccess() OVERRIDE;
  40   virtual void OnHunspellDictionaryDownloadFailure() OVERRIDE;
  41
  42   // The following static methods are public for ease of testing.
  43
  44   // Gets the set of language codes that can be used as UI language.
  45   // The return value will look like:
  46   // {'en-US': true, 'fi': true, 'fr': true, ...}
  47   //
  48   // Note that true in values does not mean anything. We just use the
  49   // dictionary as a set.
  50   static base::DictionaryValue* GetUILanguageCodeSet();
  51
  52   // Gets the set of language codes that can be used for spellchecking.
  53   // The return value will look like:
  54   // {'en-US': true, 'fi': true, 'fr': true, ...}
  55   //
  56   // Note that true in values does not mean anything. We just use the
  57   // dictionary as a set.
  58   static base::DictionaryValue* GetSpellCheckLanguageCodeSet();
  59
  60  private:
  61   // Returns the name of the product (ex. "Chrome" or "Chrome OS").
  62   virtual base::string16 GetProductName() = 0;
  63
  64   // Sets the application locale.
  65   virtual void SetApplicationLocale(const std::string& language_code) = 0;
  66
  67   // Called when the language options is opened.
  68   void LanguageOptionsOpenCallback(const base::ListValue* args);
  69
  70   // Called when the UI language is changed.
  71   // |args| will contain the language code as string (ex. "fr").
  72   void UiLanguageChangeCallback(const base::ListValue* args);
  73
  74   // Called when the spell check language is changed.
  75   // |args| will contain the language code as string (ex. "fr").
  76   void SpellCheckLanguageChangeCallback(const base::ListValue* args);
  77
  78   // Called when the user clicks "Retry" button for a spellcheck dictionary that
  79   // has failed to download.
  80   void RetrySpellcheckDictionaryDownload(const base::ListValue* args);
  81
  82   // Called when the user saves the language list preferences.
  83   void UpdateLanguageListCallback(const base::ListValue* args);
  84
  85   // Updates the hunspell dictionary that is used for spellchecking.
  86   void RefreshHunspellDictionary();
  87
  88   // Returns the hunspell dictionary that is used for spellchecking. Never null.
  89   base::WeakPtr<SpellcheckHunspellDictionary>& GetHunspellDictionary();
  90
  91   // The hunspell dictionary that is used for spellchecking. Might be null.
  92   base::WeakPtr<SpellcheckHunspellDictionary> hunspell_dictionary_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(LanguageOptionsHandlerCommon);
  95 };
  96
  97 }  // namespace options
  98
  99 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_LANGUAGE_OPTIONS_HANDLER_COMMON_H_