Font Family Preferences for Distilled Pages

components/dom_distiller/core/distilled_page_prefs.h

 // Copyright 2014 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 COMPONENTS_DOM_DISTILLER_CORE_DISTILLED_PAGE_PREFS_H_
 #define COMPONENTS_DOM_DISTILLER_CORE_DISTILLED_PAGE_PREFS_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 
 class PrefService;
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace dom_distiller {
 
 // Interface for preferences used for distilled page.
 class DistilledPagePrefs {
  public:
+  // Possible font families for distilled page.
+  enum FontFamily {
+#define DEFINE_FONT_FAMILY(name, value) name = value,
+#include "components/dom_distiller/core/font_family_list.h"
+#undef DEFINE_FONT_FAMILY
+  };
+
   // Possible themes for distilled page.
   enum Theme {
 #define DEFINE_THEME(name, value) name = value,
 #include "components/dom_distiller/core/theme_list.h"
 #undef DEFINE_THEME
   };
 
   class Observer {
    public:
+    virtual void OnChangeFontFamily(FontFamily font) = 0;
     virtual void OnChangeTheme(Theme theme) = 0;
   };
 
   explicit DistilledPagePrefs(PrefService* pref_service);
   ~DistilledPagePrefs();
 
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
+  // Sets the user's preference for the font family of distilled pages.
+  void SetFontFamily(FontFamily new_font);
+  // Returns the user's preference for the font family of distilled pages.
+  FontFamily GetFontFamily();
+
   // Sets the user's preference for the theme of distilled pages.
   void SetTheme(Theme new_theme);
   // Returns the user's preference for the theme of distilled pages.
   Theme GetTheme();
 
   void AddObserver(Observer* obs);
   void RemoveObserver(Observer* obs);
 
  private:
+  // Notifies all Observers of new font family.
+  void NotifyOnChangeFontFamily(FontFamily font_family);
   // Notifies all Observers of new theme.
   void NotifyOnChangeTheme(Theme theme);
 
   PrefService* pref_service_;
   ObserverList<Observer> observers_;
 
   base::WeakPtrFactory<DistilledPagePrefs> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DistilledPagePrefs);
 };
 
 }  // namespace dom_distiller
 
 #endif  // COMPONENTS_DOM_DISTILLER_CORE_DISTILLED_PAGE_PREFS_H_