chrome/browser/ui/webui/options/font_settings_handler.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_FONT_SETTINGS_HANDLER_H_
   6 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_FONT_SETTINGS_HANDLER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/prefs/pref_member.h"
  10 #include "chrome/browser/ui/webui/options/options_ui.h"
  11 #include "content/public/browser/notification_observer.h"
  12 #include "content/public/browser/notification_registrar.h"
  13
  14 namespace base {
  15 class ListValue;
  16 }
  17
  18 namespace extensions {
  19 class Extension;
  20 }
  21
  22 namespace options {
  23
  24 // Font settings overlay page UI handler.
  25 class FontSettingsHandler : public OptionsPageUIHandler,
  26                             public content::NotificationObserver {
  27  public:
  28   FontSettingsHandler();
  29   virtual ~FontSettingsHandler();
  30
  31   // OptionsPageUIHandler implementation.
  32   virtual void GetLocalizedValues(
  33       base::DictionaryValue* localized_strings) OVERRIDE;
  34   virtual void InitializeHandler() OVERRIDE;
  35   virtual void InitializePage() OVERRIDE;
  36
  37   // WebUIMessageHandler implementation.
  38   virtual void RegisterMessages() OVERRIDE;
  39
  40  private:
  41   // content::NotificationObserver implementation.
  42   virtual void Observe(int type,
  43                        const content::NotificationSource& source,
  44                        const content::NotificationDetails& details) OVERRIDE;
  45
  46   void HandleFetchFontsData(const base::ListValue* args);
  47
  48   void FontsListHasLoaded(scoped_ptr<base::ListValue> list);
  49
  50   void SetUpStandardFontSample();
  51   void SetUpSerifFontSample();
  52   void SetUpSansSerifFontSample();
  53   void SetUpFixedFontSample();
  54   void SetUpMinimumFontSample();
  55
  56   // Returns the Advanced Font Settings Extension if it's installed and enabled,
  57   // or NULL otherwise.
  58   const extensions::Extension* GetAdvancedFontSettingsExtension();
  59   // Notifies the web UI about whether the Advanced Font Settings Extension is
  60   // installed and enabled.
  61   void NotifyAdvancedFontSettingsAvailability();
  62   // Opens the options page of the Advanced Font Settings Extension.
  63   void HandleOpenAdvancedFontSettingsOptions(const base::ListValue* args);
  64
  65   void OnWebKitDefaultFontSizeChanged();
  66
  67   StringPrefMember standard_font_;
  68   StringPrefMember serif_font_;
  69   StringPrefMember sans_serif_font_;
  70   StringPrefMember fixed_font_;
  71   StringPrefMember font_encoding_;
  72   IntegerPrefMember default_font_size_;
  73   IntegerPrefMember default_fixed_font_size_;
  74   IntegerPrefMember minimum_font_size_;
  75
  76   content::NotificationRegistrar registrar_;
  77
  78   DISALLOW_COPY_AND_ASSIGN(FontSettingsHandler);
  79 };
  80
  81 }  // namespace options
  82
  83 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_FONT_SETTINGS_HANDLER_H_