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/*
* 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.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* 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 ComputedStyle;
class LayoutFullScreen;
class CORE_EXPORT Fullscreen final
: public GarbageCollectedFinalized<Fullscreen>,
public Supplement<Document>,
public ContextLifecycleObserver {
USING_GARBAGE_COLLECTED_MIXIN(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&);
enum class RequestType {
// Element.requestFullscreen()
Unprefixed,
// Element.webkitRequestFullscreen()/webkitRequestFullScreen() and
// HTMLVideoElement.webkitEnterFullscreen()/webkitEnterFullScreen()
Prefixed,
};
static void requestFullscreen(Element&);
// |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 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.back().first.get()
: nullptr;
}
// Called by FullscreenController to notify that we've entered or exited
// fullscreen. All frames are notified, so there may be no pending request.
void didEnterFullscreen();
void didExitFullscreen();
void setFullScreenLayoutObject(LayoutFullScreen*);
LayoutFullScreen* fullScreenLayoutObject() const {
return m_fullScreenLayoutObject;
}
void fullScreenLayoutObjectDestroyed();
void elementRemoved(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(ExecutionContext*) 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*);
Member<Element> m_pendingFullscreenElement;
HeapVector<std::pair<Member<Element>, RequestType>> m_fullscreenElementStack;
Member<Element> m_currentFullScreenElement;
LayoutFullScreen* m_fullScreenLayoutObject;
TaskRunnerTimer<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;
};
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;
}
} // namespace blink
#endif // Fullscreen_h
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