chrome/browser/ui/prefs/prefs_tab_helper.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_PREFS_PREFS_TAB_HELPER_H_
   6 #define CHROME_BROWSER_UI_PREFS_PREFS_TAB_HELPER_H_
   7
   8 #include "base/callback_list.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "chrome/browser/ui/zoom/chrome_zoom_level_prefs.h"
  12 #include "content/public/browser/notification_observer.h"
  13 #include "content/public/browser/notification_registrar.h"
  14 #include "content/public/browser/web_contents_user_data.h"
  15
  16 class OverlayUserPrefStore;
  17 class PrefService;
  18 class Profile;
  19
  20 namespace content {
  21 class WebContents;
  22 }
  23
  24 namespace user_prefs {
  25 class PrefRegistrySyncable;
  26 }
  27
  28 // Per-tab class to handle user preferences.
  29 class PrefsTabHelper : public content::NotificationObserver,
  30                        public content::WebContentsUserData<PrefsTabHelper> {
  31  public:
  32   ~PrefsTabHelper() override;
  33
  34   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
  35   static void GetServiceInstance();
  36
  37  protected:
  38   // Update the RenderView's WebPreferences. Exposed as protected for testing.
  39   virtual void UpdateWebPreferences();
  40
  41  private:
  42   explicit PrefsTabHelper(content::WebContents* contents);
  43   friend class content::WebContentsUserData<PrefsTabHelper>;
  44   friend class PrefWatcher;
  45
  46   // content::NotificationObserver overrides:
  47   void Observe(int type,
  48                const content::NotificationSource& source,
  49                const content::NotificationDetails& details) override;
  50
  51   // Update the WebContents's RendererPreferences.
  52   void UpdateRendererPreferences();
  53
  54   void OnFontFamilyPrefChanged(const std::string& pref_name);
  55   void OnWebPrefChanged(const std::string& pref_name);
  56
  57   content::WebContents* web_contents_;
  58   Profile* profile_;
  59   content::NotificationRegistrar registrar_;
  60   scoped_ptr<base::CallbackList<void(void)>::Subscription>
  61       style_sheet_subscription_;
  62   scoped_ptr<ChromeZoomLevelPrefs::DefaultZoomLevelSubscription>
  63       default_zoom_level_subscription_;
  64   base::WeakPtrFactory<PrefsTabHelper> weak_ptr_factory_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(PrefsTabHelper);
  67 };
  68
  69 #endif  // CHROME_BROWSER_UI_PREFS_PREFS_TAB_HELPER_H_