chrome/browser/plugins/plugin_status_pref_setter.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_PLUGINS_PLUGIN_STATUS_PREF_SETTER_H_
   6 #define CHROME_BROWSER_PLUGINS_PLUGIN_STATUS_PREF_SETTER_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/prefs/pref_member.h"
  13 #include "content/public/browser/notification_observer.h"
  14 #include "content/public/browser/notification_registrar.h"
  15
  16 class PluginPrefs;
  17 class PrefService;
  18 class Profile;
  19
  20 namespace webkit {
  21 struct WebPluginInfo;
  22 }
  23
  24 // Helper class modeled after BooleanPrefMember to (asynchronously) update
  25 // preferences related to plugin enable status.
  26 // It should only be used from the UI thread. The client has to make sure that
  27 // the passed profile outlives this object.
  28 class PluginStatusPrefSetter : public content::NotificationObserver {
  29  public:
  30   PluginStatusPrefSetter();
  31   virtual ~PluginStatusPrefSetter();
  32
  33   // Binds the preferences in the profile's PrefService, notifying |observer| if
  34   // any value changes.
  35   // This asynchronously calls the PluginService to get the list of installed
  36   // plug-ins.
  37   void Init(Profile* profile,
  38             const BooleanPrefMember::NamedChangeCallback& observer);
  39
  40   bool IsClearPluginLSODataEnabled() const {
  41     return clear_plugin_lso_data_enabled_.GetValue();
  42   }
  43
  44   bool IsPepperFlashSettingsEnabled() const {
  45     return pepper_flash_settings_enabled_.GetValue();
  46   }
  47
  48   // content::NotificationObserver methods:
  49   virtual void Observe(int type,
  50                        const content::NotificationSource& source,
  51                        const content::NotificationDetails& details) OVERRIDE;
  52
  53  private:
  54   void StartUpdate();
  55   void GotPlugins(scoped_refptr<PluginPrefs> plugin_prefs,
  56                   const std::vector<webkit::WebPluginInfo>& plugins);
  57
  58   content::NotificationRegistrar registrar_;
  59   // Weak pointer.
  60   Profile* profile_;
  61   base::WeakPtrFactory<PluginStatusPrefSetter> factory_;
  62
  63   // Whether clearing LSO data is supported.
  64   BooleanPrefMember clear_plugin_lso_data_enabled_;
  65   // Whether we should show Pepper Flash-specific settings.
  66   BooleanPrefMember pepper_flash_settings_enabled_;
  67
  68   DISALLOW_COPY_AND_ASSIGN(PluginStatusPrefSetter);
  69 };
  70
  71 #endif  // CHROME_BROWSER_PLUGINS_PLUGIN_STATUS_PREF_SETTER_H_