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   ~LanguageOptionsHandlerCommon() override;
  27
  28   // OptionsPageUIHandler implementation.
  29   void GetLocalizedValues(base::DictionaryValue* localized_strings) override;
  30   void Uninitialize() override;
  31
  32   // DOMMessageHandler implementation.
  33   void RegisterMessages() override;
  34
  35   // SpellcheckHunspellDictionary::Observer implementation.
  36   void OnHunspellDictionaryInitialized() override;
  37   void OnHunspellDictionaryDownloadBegin() override;
  38   void OnHunspellDictionaryDownloadSuccess() override;
  39   void OnHunspellDictionaryDownloadFailure() override;
  40
  41   // The following static methods are public for ease of testing.
  42
  43   // Gets the set of language codes that can be used as UI language.
  44   // The return value will look like:
  45   // {'en-US': true, 'fi': true, 'fr': true, ...}
  46   //
  47   // Note that true in values does not mean anything. We just use the
  48   // dictionary as a set.
  49   static base::DictionaryValue* GetUILanguageCodeSet();
  50
  51   // Gets the set of language codes that can be used for spellchecking.
  52   // The return value will look like:
  53   // {'en-US': true, 'fi': true, 'fr': true, ...}
  54   //
  55   // Note that true in values does not mean anything. We just use the
  56   // dictionary as a set.
  57   static base::DictionaryValue* GetSpellCheckLanguageCodeSet();
  58
  59  private:
  60   // Returns the name of the product (ex. "Chrome" or "Chrome OS").
  61   virtual base::string16 GetProductName() = 0;
  62
  63   // Sets the application locale.
  64   virtual void SetApplicationLocale(const std::string& language_code) = 0;
  65
  66   // Called when the language options is opened.
  67   void LanguageOptionsOpenCallback(const base::ListValue* args);
  68
  69   // Called when the UI language is changed.
  70   // |args| will contain the language code as string (ex. "fr").
  71   void UiLanguageChangeCallback(const base::ListValue* args);
  72
  73   // Called when the spell check language is changed.
  74   // |args| will contain the language code as string (ex. "fr").
  75   void SpellCheckLanguageChangeCallback(const base::ListValue* args);
  76
  77   // Called when the user clicks "Retry" button for a spellcheck dictionary that
  78   // has failed to download.
  79   void RetrySpellcheckDictionaryDownload(const base::ListValue* args);
  80
  81   // Called when the user saves the language list preferences.
  82   void UpdateLanguageListCallback(const base::ListValue* args);
  83
  84   // Updates the hunspell dictionary that is used for spellchecking.
  85   void RefreshHunspellDictionary();
  86
  87   // Returns the hunspell dictionary that is used for spellchecking. Null when
  88   // no languages are selected for spellchecking.
  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_