Add character encoding to Font Settings Extension API.

chrome/browser/extensions/extension_font_settings_api.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_FONT_SETTINGS_API_H__
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_FONT_SETTINGS_API_H__
 #pragma once
 
 #include <map>
 
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 
 class ExtensionFontSettingsEventRouter : public content::NotificationObserver {
  public:
   explicit ExtensionFontSettingsEventRouter(Profile* profile);
   virtual ~ExtensionFontSettingsEventRouter();
 
   void Init();
 
  private:
-  typedef std::map<std::string, std::string> PrefEventMap;
+  typedef std::pair<std::string, std::string> EventAndKeyPair;
+  // Map of pref name to a pair of event name and key (defined in the API) for
+  // dispatching a pref changed event. For example,
+  // "webkit.webprefs.default_font_size" to ("onDefaultFontSizedChanged",
+  // "pixelSize").
+  typedef std::map<std::string, EventAndKeyPair> PrefEventMap;
+
+  void AddPrefToObserve(const char* pref_name,
+                        const char* event_name,
+                        const char* key);
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
+
   void OnFontNamePrefChanged(PrefService* pref_service,
-                             const std::string& pref_key,
+                             const std::string& pref_name,
                              const std::string& generic_family,
                              const std::string& script,
                              bool incognito);
-  void OnFontSizePrefChanged(PrefService* pref_service,
-                             const std::string& pref_key,
-                             const std::string& event_name,
-                             bool incognito);
+  void OnFontPrefChanged(PrefService* pref_service,
+                         const std::string& pref_name,
+                         const std::string& event_name,
+                         const std::string& key,
+                         bool incognito);
 
   PrefChangeRegistrar registrar_;
 
-  // Map of pref key to event name.
-  std::map<std::string, std::string> pref_event_map_;
+  PrefEventMap pref_event_map_;
 
   // Weak, owns us (transitively via ExtensionService).
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionFontSettingsEventRouter);
 };
 
 class GetFontFunction : public SyncExtensionFunction {
  public:
   virtual bool RunImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.fontSettings.getFont")
 };
 
 class SetFontFunction : public SyncExtensionFunction {
  public:
   virtual bool RunImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.fontSettings.setFont")
 };
 
 class GetFontListFunction : public AsyncExtensionFunction {
  public:
   virtual bool RunImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.fontSettings.getFontList")
 
  private:
   void FontListHasLoaded(scoped_ptr<base::ListValue> list);
   bool CopyFontsToResult(base::ListValue* fonts);
 };
 
-// Base class for functions that get a font size.
-class GetFontSizeExtensionFunction : public SyncExtensionFunction {
+// Base class for functions that get a font pref.
+class GetFontPrefExtensionFunction : public SyncExtensionFunction {
  protected:
   virtual bool RunImpl() OVERRIDE;
 
-  // Implementations should return the name of the font size preference to get.
+  // Implementations should return the name of the preference to get, like
+  // "webkit.webprefs.default_font_size".
   virtual const char* GetPrefName() = 0;
+
+  // Implementations should return the key for the value in the extension API,
+  // like "pixelSize".
+  virtual const char* GetKey() = 0;
 };
 
-// Base class for functions that set a font size.
-class SetFontSizeExtensionFunction : public SyncExtensionFunction {
+// Base class for functions that set a font pref.
+class SetFontPrefExtensionFunction : public SyncExtensionFunction {
  protected:
   virtual bool RunImpl() OVERRIDE;
 
-  // Implementations should return the name of the font size preference to set.
+  // Implementations should return the name of the preference to set, like
+  // "webkit.webprefs.default_font_size".
   virtual const char* GetPrefName() = 0;
+
+  // Implementations should return the key for the value in the extension API,
+  // like "pixelSize".
+  virtual const char* GetKey() = 0;
 };
 
-class GetDefaultFontSizeFunction : public GetFontSizeExtensionFunction {
+class GetDefaultFontSizeFunction : public GetFontPrefExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME(
       "experimental.fontSettings.getDefaultFontSize")
 
  protected:
   virtual const char* GetPrefName() OVERRIDE;
+  virtual const char* GetKey() OVERRIDE;
 };
 
-class SetDefaultFontSizeFunction : public SetFontSizeExtensionFunction {
+class SetDefaultFontSizeFunction : public SetFontPrefExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME(
       "experimental.fontSettings.setDefaultFontSize")
 
  protected:
   virtual const char* GetPrefName() OVERRIDE;
+  virtual const char* GetKey() OVERRIDE;
 };
 
-class GetDefaultFixedFontSizeFunction : public GetFontSizeExtensionFunction {
+class GetDefaultFixedFontSizeFunction : public GetFontPrefExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME(
       "experimental.fontSettings.getDefaultFixedFontSize")
 
  protected:
   virtual const char* GetPrefName() OVERRIDE;
+  virtual const char* GetKey() OVERRIDE;
 };
 
-class SetDefaultFixedFontSizeFunction : public SetFontSizeExtensionFunction {
+class SetDefaultFixedFontSizeFunction : public SetFontPrefExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME(
       "experimental.fontSettings.setDefaultFixedFontSize")
 
  protected:
   virtual const char* GetPrefName() OVERRIDE;
+  virtual const char* GetKey() OVERRIDE;
 };
 
-class GetMinimumFontSizeFunction : public GetFontSizeExtensionFunction {
+class GetMinimumFontSizeFunction : public GetFontPrefExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME(
       "experimental.fontSettings.getMinimumFontSize")
 
  protected:
   virtual const char* GetPrefName() OVERRIDE;
+  virtual const char* GetKey() OVERRIDE;
 };
 
-class SetMinimumFontSizeFunction : public SetFontSizeExtensionFunction {
+class SetMinimumFontSizeFunction : public SetFontPrefExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME(
       "experimental.fontSettings.setMinimumFontSize")
 
  protected:
   virtual const char* GetPrefName() OVERRIDE;
+  virtual const char* GetKey() OVERRIDE;
+};
+
+class GetDefaultCharacterSetFunction : public GetFontPrefExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION_NAME(
+      "experimental.fontSettings.getDefaultCharacterSet")
+
+ protected:
+  virtual const char* GetPrefName() OVERRIDE;
+  virtual const char* GetKey() OVERRIDE;
+};
+
+class SetDefaultCharacterSetFunction : public SetFontPrefExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION_NAME(
+      "experimental.fontSettings.setDefaultCharacterSet")
+
+ protected:
+  virtual const char* GetPrefName() OVERRIDE;
+  virtual const char* GetKey() OVERRIDE;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_FONT_SETTINGS_API_H__