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| 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 #include "chrome/browser/chromeos/accessibility/magnification_manager.h" | |
| 6 | |
| 7 #include "ash/magnifier/magnification_controller.h" | |
| 8 #include "ash/shell.h" | |
| 9 #include "base/memory/scoped_ptr.h" | |
| 10 #include "base/memory/singleton.h" | |
| 11 #include "chrome/browser/api/prefs/pref_change_registrar.h" | |
| 12 #include "chrome/browser/api/prefs/pref_member.h" | |
| 13 #include "chrome/browser/chromeos/login/user_manager.h" | |
| 14 #include "chrome/browser/prefs/pref_service.h" | |
| 15 #include "chrome/browser/profiles/profile.h" | |
| 16 #include "chrome/browser/profiles/profile_manager.h" | |
| 17 #include "chrome/common/chrome_notification_types.h" | |
| 18 #include "chrome/common/pref_names.h" | |
| 19 #include "content/public/browser/notification_observer.h" | |
| 20 #include "content/public/browser/notification_observer.h" | |
| 21 #include "content/public/browser/notification_registrar.h" | |
| 22 #include "content/public/browser/notification_service.h" | |
| 23 | |
| 24 namespace chromeos { | |
| 25 | |
| 26 class MagnificationManagerImpl : public MagnificationManager, | |
| 27 public content::NotificationObserver { | |
| 28 public: | |
| 29 MagnificationManagerImpl() { | |
| 30 DCHECK(!instance_); | |
| 31 instance_ = this; | |
| 32 | |
| 33 registrar_.Add(this, | |
| 34 chrome::NOTIFICATION_SESSION_STARTED, | |
| 35 content::NotificationService::AllSources()); | |
| 36 registrar_.Add(this, | |
| 37 chrome::NOTIFICATION_PROFILE_CREATED, | |
| 38 content::NotificationService::AllSources()); | |
| 39 registrar_.Add(this, | |
| 40 chrome::NOTIFICATION_LOGIN_WEBUI_VISIBLE, | |
| 41 content::NotificationService::AllSources()); | |
| 42 | |
| 43 Profile* profile = ProfileManager::GetDefaultProfileOrOffTheRecord(); | |
| 44 SetProfile(profile); | |
| 45 } | |
| 46 virtual ~MagnificationManagerImpl() {} | |
| 47 | |
| 48 static MagnificationManagerImpl* GetInstance() { | |
| 49 return instance_; | |
| 50 } | |
| 51 | |
| 52 // MagnificationManager implimentation: | |
| 53 bool IsEnabled() OVERRIDE { | |
| 54 return ash::Shell::GetInstance()->magnification_controller()->IsEnabled(); | |
| 55 } | |
| 56 | |
| 57 void SetEnabled(bool enabled) OVERRIDE { | |
| 58 ash::Shell::GetInstance()->magnification_controller()->SetEnabled(enabled); | |
| 59 } | |
| 60 | |
| 61 private: | |
| 62 void SetProfile(Profile* profile) { | |
| 63 if (pref_change_registrar_) { | |
| 64 pref_change_registrar_->Remove(prefs::kScreenMagnifierEnabled, this); | |
| 65 pref_change_registrar_.reset(); | |
| 66 } | |
| 67 | |
| 68 if (profile) { | |
| 69 pref_change_registrar_.reset(new PrefChangeRegistrar); | |
| 70 pref_change_registrar_->Init(profile->GetPrefs()); | |
| 71 pref_change_registrar_->Add(prefs::kScreenMagnifierEnabled, this); | |
| 72 } | |
| 73 | |
| 74 profile_ = profile; | |
| 75 UpdateMagnifierStatus(); | |
| 76 } | |
| 77 | |
| 78 void UpdateMagnifierStatus() { | |
| 79 UserManager* manager = UserManager::Get(); | |
| 80 if (!profile_) { | |
| 81 SetEnabled(false); | |
| 82 } else if (manager && !manager->IsSessionStarted()) { | |
| 83 SetEnabled(true); | |
| 84 } else { | |
| 85 PrefService* pref_service = profile_->GetPrefs(); | |
| 86 bool enabled = pref_service->GetBoolean(prefs::kScreenMagnifierEnabled); | |
| 87 SetEnabled(enabled); | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 // content::NotificationObserver implimentation: | |
| 92 virtual void Observe(int type, | |
| 93 const content::NotificationSource& source, | |
| 94 const content::NotificationDetails& details) OVERRIDE { | |
| 95 switch (type) { | |
| 96 case chrome::NOTIFICATION_PREF_CHANGED: { | |
| 97 std::string pref = *content::Details<std::string>(details).ptr(); | |
| 98 if (pref == prefs::kScreenMagnifierEnabled) | |
| 99 UpdateMagnifierStatus(); | |
| 100 break; | |
| 101 } | |
| 102 case chrome::NOTIFICATION_LOGIN_WEBUI_VISIBLE: | |
| 103 case chrome::NOTIFICATION_SESSION_STARTED: { | |
| 104 Profile* profile = ProfileManager::GetDefaultProfileOrOffTheRecord(); | |
| 105 SetProfile(profile); | |
| 106 break; | |
| 107 } | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 static MagnificationManagerImpl* instance_; | |
| 112 | |
| 113 Profile* profile_; | |
| 114 content::NotificationRegistrar registrar_; | |
| 115 scoped_ptr<PrefChangeRegistrar> pref_change_registrar_; | |
| 116 | |
| 117 friend struct DefaultSingletonTraits<MagnificationManagerImpl>; | |
| 118 DISALLOW_COPY_AND_ASSIGN(MagnificationManagerImpl); | |
| 119 }; | |
| 120 | |
| 121 MagnificationManagerImpl* MagnificationManagerImpl::instance_ = NULL; | |
| 122 | |
| 123 MagnificationManager* MagnificationManager::GetInstance() { | |
| 124 return MagnificationManagerImpl::GetInstance(); | |
| 125 } | |
| 126 | |
| 127 MagnificationManager* MagnificationManager::CreateInstance() { | |
| 128 // Makes sure that this is not called more than once. | |
| 129 CHECK(!GetInstance()); | |
| 130 | |
| 131 return new MagnificationManagerImpl(); | |
| 132 } | |
| 133 | |
| 134 } // namespace chromeos | |
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Chromium Code Reviews
Issue 11194011:
Reverting this CL because it was committed before I gave the final LGTM. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/