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      1 // Copyright 2014 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 ScreenOrientationController_h
      6 #define ScreenOrientationController_h
      7 
      8 #include "core/frame/FrameDestructionObserver.h"
      9 #include "core/frame/PlatformEventController.h"
     10 #include "platform/Supplementable.h"
     11 #include "platform/Timer.h"
     12 #include "public/platform/WebLockOrientationCallback.h"
     13 #include "public/platform/WebScreenOrientationLockType.h"
     14 #include "public/platform/WebScreenOrientationType.h"
     15 
     16 namespace blink {
     17 
     18 class FrameView;
     19 class ScreenOrientation;
     20 class WebScreenOrientationClient;
     21 
     22 class ScreenOrientationController FINAL
     23     : public NoBaseWillBeGarbageCollectedFinalized<ScreenOrientationController>
     24     , public WillBeHeapSupplement<LocalFrame>
     25     , public FrameDestructionObserver
     26     , public PlatformEventController {
     27     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(ScreenOrientationController);
     28     WTF_MAKE_NONCOPYABLE(ScreenOrientationController);
     29 public:
     30     virtual ~ScreenOrientationController();
     31 
     32     void setOrientation(ScreenOrientation*);
     33     void notifyOrientationChanged();
     34 
     35     void lock(WebScreenOrientationLockType, WebLockOrientationCallback*);
     36     void unlock();
     37 
     38     static void provideTo(LocalFrame&, WebScreenOrientationClient*);
     39     static ScreenOrientationController* from(LocalFrame&);
     40     static const char* supplementName();
     41 
     42     virtual void trace(Visitor*) OVERRIDE;
     43 
     44 private:
     45     explicit ScreenOrientationController(LocalFrame&, WebScreenOrientationClient*);
     46     static WebScreenOrientationType computeOrientation(FrameView*);
     47 
     48     // Inherited from PlatformEventController.
     49     virtual void didUpdateData() OVERRIDE;
     50     virtual void registerWithDispatcher() OVERRIDE;
     51     virtual void unregisterWithDispatcher() OVERRIDE;
     52     virtual bool hasLastData() OVERRIDE;
     53     virtual void pageVisibilityChanged() OVERRIDE;
     54 
     55     // Inherited from FrameDestructionObserver.
     56     virtual void willDetachFrameHost() override;
     57 
     58     void notifyDispatcher();
     59 
     60     void updateOrientation();
     61 
     62     void dispatchEventTimerFired(Timer<ScreenOrientationController>*);
     63 
     64     bool isActiveAndVisible() const;
     65 
     66     PersistentWillBeMember<ScreenOrientation> m_orientation;
     67     WebScreenOrientationClient* m_client;
     68     Timer<ScreenOrientationController> m_dispatchEventTimer;
     69 };
     70 
     71 } // namespace blink
     72 
     73 #endif // ScreenOrientationController_h
     74