Stop firing orientationchange events at pages that are not visible

Source/core/dom/FullscreenElementStack.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
@@ skipping 23 matching lines @@
 #include "platform/Timer.h"
 #include "platform/geometry/LayoutRect.h"
 #include "wtf/Deque.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
 class Document;
 class Element;
+class ExecutionContext;
+class FullscreenObserver;
 class Node;
 class RenderFullScreen;
 class RenderStyle;
-class ExecutionContext;
 
 class FullscreenElementStack FINAL
     : public NoBaseWillBeGarbageCollectedFinalized<FullscreenElementStack>
     , public DocumentSupplement
     , public DocumentLifecycleObserver {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(FullscreenElementStack);
 public:
     virtual ~FullscreenElementStack();
     static const char* supplementName();
     static FullscreenElementStack& from(Document&);
@@ skipping 36 matching lines @@
 
     bool webkitIsFullScreen() const { return m_fullScreenElement.get(); }
     bool webkitFullScreenKeyboardInputAllowed() const { return m_fullScreenElement.get() && m_areKeysEnabledInFullScreen; }
     Element* webkitCurrentFullScreenElement() const { return m_fullScreenElement.get(); }
 
     virtual void documentWasDetached() OVERRIDE;
     virtual void documentWasDisposed() OVERRIDE;
 
     virtual void trace(Visitor*) OVERRIDE;
 
+    void addObserver(FullscreenObserver*);
+    void removeObserver(FullscreenObserver*);
+
 private:
     static FullscreenElementStack* fromIfExistsSlow(Document&);
 
     explicit FullscreenElementStack(Document&);
 
     Document* document();
     void fullScreenChangeDelayTimerFired(Timer<FullscreenElementStack>*);
 
+    void notifyObserversDidFullyExitFullScreen();
+
     bool m_areKeysEnabledInFullScreen;
     RefPtrWillBeMember<Element> m_fullScreenElement;
     WillBeHeapVector<RefPtrWillBeMember<Element> > m_fullScreenElementStack;
     RenderFullScreen* m_fullScreenRenderer;
     Timer<FullscreenElementStack> m_fullScreenChangeDelayTimer;
     WillBeHeapDeque<RefPtrWillBeMember<Node> > m_fullScreenChangeEventTargetQueue;
     WillBeHeapDeque<RefPtrWillBeMember<Node> > m_fullScreenErrorEventTargetQueue;
     LayoutRect m_savedPlaceholderFrameRect;
     RefPtr<RenderStyle> m_savedPlaceholderRenderStyle;
+    typedef HashSet<FullscreenObserver*> FullscreenObserverSet;
+    FullscreenObserverSet m_fullscreenObservers;
 };
 
 inline bool FullscreenElementStack::isActiveFullScreenElement(const Element* element)
 {
     FullscreenElementStack* controller = fromIfExists(element->document());
     if (!controller)
         return false;
     return controller->webkitIsFullScreen() && controller->webkitCurrentFullScreenElement() == element;
 }
 
 inline FullscreenElementStack* FullscreenElementStack::fromIfExists(Document& document)
 {
     if (!document.hasFullscreenElementStack())
         return 0;
     return fromIfExistsSlow(document);
 }
 
 } // namespace WebCore
 
 #endif // FullscreenElementStack_h