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
16class PluginPrefs;
17class PrefService;
18class Profile;
19
20namespace content {
21struct 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.
28class 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<content::WebPluginInfo>& plugins);
57
58  content::NotificationRegistrar registrar_;
59  // Weak pointer.
60  Profile* profile_;
61
62  // Whether clearing LSO data is supported.
63  BooleanPrefMember clear_plugin_lso_data_enabled_;
64  // Whether we should show Pepper Flash-specific settings.
65  BooleanPrefMember pepper_flash_settings_enabled_;
66
67  base::WeakPtrFactory<PluginStatusPrefSetter> factory_;
68
69  DISALLOW_COPY_AND_ASSIGN(PluginStatusPrefSetter);
70};
71
72#endif  // CHROME_BROWSER_PLUGINS_PLUGIN_STATUS_PREF_SETTER_H_
73