NOT FOR REVIEW: Fullscreen WIP

third_party/WebKit/Source/core/dom/Fullscreen.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)
@@ skipping 13 matching lines @@
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef Fullscreen_h
 #define Fullscreen_h
 
 #include "core/CoreExport.h"
-#include "core/dom/ContextLifecycleObserver.h"
-#include "core/dom/Document.h"
 #include "core/dom/Element.h"
-#include "platform/Supplementable.h"
-#include "platform/Timer.h"
-#include "platform/geometry/LayoutRect.h"
-#include "wtf/Deque.h"
-#include "wtf/RefPtr.h"
-#include "wtf/Vector.h"
 
 namespace blink {
 
-class LayoutFullScreen;
-class ComputedStyle;
+class Document;
 
-class CORE_EXPORT Fullscreen final
-    : public GarbageCollectedFinalized<Fullscreen>,
-      public Supplement<Document>,
-      public ContextLifecycleObserver {
-  USING_GARBAGE_COLLECTED_MIXIN(Fullscreen);
-
+class CORE_EXPORT Fullscreen {
  public:
-  virtual ~Fullscreen();
-  static const char* supplementName();
-  static Fullscreen& from(Document&);
-  static Fullscreen* fromIfExists(Document&);
-  static Element* fullscreenElementFrom(Document&);
-  static Element* fullscreenElementForBindingFrom(TreeScope&);
-  static Element* currentFullScreenElementFrom(Document&);
-  static Element* currentFullScreenElementForBindingFrom(Document&);
-  static bool isCurrentFullScreenElement(const Element&);
+  static bool isFullscreenElement(const Element&);
 
   enum RequestType {
     // Element.requestFullscreen()
     UnprefixedRequest,
     // Element.webkitRequestFullscreen()/webkitRequestFullScreen() and
     // HTMLVideoElement.webkitEnterFullscreen()/webkitEnterFullScreen()
     PrefixedRequest,
   };
 
-  // |forCrossProcessDescendant| is used in OOPIF scenarios and is set to
-  // true when fullscreen is requested for an out-of-process descendant
-  // element.
-  static void requestFullscreen(Element&,
-                                RequestType,
-                                bool forCrossProcessDescendant = false);
+  static void requestFullscreen(Element&, RequestType);
 
   static void fullyExitFullscreen(Document&);
   static void exitFullscreen(Document&);
 
   static bool fullscreenEnabled(Document&);
-  // TODO(foolip): The fullscreen element stack is modified synchronously in
-  // requestFullscreen(), which is not per spec and means that
-  // |fullscreenElement()| is not always the same as
-  // |currentFullScreenElement()|, see https://crbug.com/402421.
-  Element* fullscreenElement() const {
-    return !m_fullscreenElementStack.isEmpty()
-               ? m_fullscreenElementStack.last().first.get()
-               : nullptr;
-  }
+  static Element* fullscreenElement(Document&);
+  static Element* fullscreenElementForBinding(TreeScope&);
 
-  void didEnterFullscreenForElement(Element*);
-  void didExitFullscreen();
+  static void didEnterFullscreenForElement(Element&, RequestType);
+  static void animationFrameTaskAfterEnter(Element*, RequestType, bool error);
 
-  void setFullScreenLayoutObject(LayoutFullScreen*);
-  LayoutFullScreen* fullScreenLayoutObject() const {
-    return m_fullScreenLayoutObject;
-  }
-  void fullScreenLayoutObjectDestroyed();
+  static void didExitFullscreen(Document&);
+  static void animationFrameTaskAfterExit(Document*);
 
-  void elementRemoved(Element&);
+  static void didUpdateSize(Element&);
 
-  // Returns true if the current fullscreen element stack corresponds to a
-  // container for an actual fullscreen element in a descendant
-  // out-of-process iframe.
-  bool forCrossProcessDescendant() { return m_forCrossProcessDescendant; }
-
-  // Mozilla API
-  // TODO(foolip): |currentFullScreenElement()| is a remnant from before the
-  // fullscreen element stack. It is still maintained separately from the
-  // stack and is is what the :-webkit-full-screen pseudo-class depends on. It
-  // should be removed, see https://crbug.com/402421.
-  Element* currentFullScreenElement() const {
-    return m_currentFullScreenElement.get();
-  }
-
-  // ContextLifecycleObserver:
-  void contextDestroyed() override;
-
-  DECLARE_VIRTUAL_TRACE();
-
- private:
-  static Fullscreen* fromIfExistsSlow(Document&);
-
-  explicit Fullscreen(Document&);
-
-  Document* document();
-
-  void clearFullscreenElementStack();
-  void popFullscreenElementStack();
-  void pushFullscreenElementStack(Element&, RequestType);
-
-  void enqueueChangeEvent(Document&, RequestType);
-  void enqueueErrorEvent(Element&, RequestType);
-  void eventQueueTimerFired(TimerBase*);
-
-  HeapVector<std::pair<Member<Element>, RequestType>> m_fullscreenElementStack;
-  Member<Element> m_currentFullScreenElement;
-  LayoutFullScreen* m_fullScreenLayoutObject;
-  Timer<Fullscreen> m_eventQueueTimer;
-  HeapDeque<Member<Event>> m_eventQueue;
-  LayoutRect m_savedPlaceholderFrameRect;
-  RefPtr<ComputedStyle> m_savedPlaceholderComputedStyle;
-
-  // TODO(alexmos, dcheng): Currently, this assumes that if fullscreen was
-  // entered for an element in an out-of-process iframe, then it's not
-  // possible to re-enter fullscreen for a different element in this
-  // document, since that requires a user gesture, which can't be obtained
-  // since nothing in this document is visible, and since user gestures can't
-  // be forwarded across processes. However, the latter assumption could
-  // change if https://crbug.com/161068 is fixed so that cross-process
-  // postMessage can carry user gestures.  If that happens, this should be
-  // moved to be part of |m_fullscreenElementStack|.
-  bool m_forCrossProcessDescendant;
+  static void elementRemoved(Element&);
 };
 
-inline Fullscreen* Fullscreen::fromIfExists(Document& document) {
-  if (!document.hasFullscreenSupplement())
-    return nullptr;
-  return fromIfExistsSlow(document);
-}
-
-inline bool Fullscreen::isCurrentFullScreenElement(const Element& element) {
-  if (Fullscreen* found = fromIfExists(element.document()))
-    return found->currentFullScreenElement() == &element;
-  return false;
+inline bool Fullscreen::isFullscreenElement(const Element& element) {
+  return fullscreenElement(element.document()) == &element;
 }
 
 }  // namespace blink
 
 #endif  // Fullscreen_h