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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 #ifndef CHROME_BROWSER_CHROMEOS_SCREENSAVER_SCREENSAVER_CONTROLLER_H_
      6 #define CHROME_BROWSER_CHROMEOS_SCREENSAVER_SCREENSAVER_CONTROLLER_H_
      7 
      8 #include <string>
      9 
     10 #include "ash/wm/user_activity_observer.h"
     11 #include "base/basictypes.h"
     12 #include "base/gtest_prod_util.h"
     13 #include "base/memory/weak_ptr.h"
     14 #include "base/time/time.h"
     15 #include "chromeos/dbus/power_manager_client.h"
     16 #include "content/public/browser/notification_observer.h"
     17 #include "content/public/browser/notification_registrar.h"
     18 
     19 namespace extensions {
     20 class Extension;
     21 }
     22 
     23 namespace chromeos {
     24 
     25 // This class controls the management of the screensaver extension. It is
     26 // responsible for:
     27 // . Enabling and disabling of the screensaver, along with ensuring that we
     28 //   have only one screensaver at a time.
     29 // . Managing the showing and hiding of the current screensaver based on user
     30 //   activity.
     31 // . Any power management that may be required while a screensaver is active.
     32 class ScreensaverController : public ash::UserActivityObserver,
     33                               public PowerManagerClient::Observer,
     34                               public content::NotificationObserver {
     35  public:
     36   ScreensaverController();
     37   virtual ~ScreensaverController();
     38 
     39  private:
     40   FRIEND_TEST_ALL_PREFIXES(ScreensaverControllerTest, Basic);
     41   FRIEND_TEST_ALL_PREFIXES(ScreensaverControllerTest, OutOfOrder);
     42 
     43   // Overridden from content::NotificationObserver:
     44   virtual void Observe(int type,
     45                        const content::NotificationSource& source,
     46                        const content::NotificationDetails& details) OVERRIDE;
     47 
     48   // Overridden from PowerManagerClient::Observer:
     49   virtual void IdleNotify(int64 threshold) OVERRIDE;
     50 
     51   // UserActivityObserver overrides:
     52   virtual void OnUserActivity(const ui::Event* event) OVERRIDE;
     53 
     54   void SetupScreensaver(const std::string& screensaver_extension_id);
     55   void TeardownScreensaver();
     56 
     57   void RequestNextIdleNotification();
     58 
     59   std::string screensaver_extension_id_;
     60 
     61   content::NotificationRegistrar registrar_;
     62 
     63   base::TimeDelta threshold_;
     64 
     65   base::WeakPtrFactory<ScreensaverController> weak_ptr_factory_;
     66 
     67   DISALLOW_COPY_AND_ASSIGN(ScreensaverController);
     68 };
     69 
     70 }  // namespace chromeos
     71 
     72 #endif  // CHROME_BROWSER_CHROMEOS_SCREENSAVER_SCREENSAVER_CONTROLLER_H_
     73