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/*
* Copyright (C) 2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ExceptionOr.h"
#include "PointerID.h"
#include <wtf/HashMap.h>
namespace WebCore {
class Document;
class Element;
class EventTarget;
class IntPoint;
class MouseEvent;
class Page;
class PlatformTouchEvent;
class PointerEvent;
class WindowProxy;
class PointerCaptureController {
WTF_MAKE_NONCOPYABLE(PointerCaptureController);
WTF_MAKE_FAST_ALLOCATED;
public:
explicit PointerCaptureController(Page&);
Element* pointerCaptureElement(Document*, PointerID) const;
ExceptionOr<void> setPointerCapture(Element*, PointerID);
ExceptionOr<void> releasePointerCapture(Element*, PointerID);
bool hasPointerCapture(Element*, PointerID);
void reset();
void pointerLockWasApplied();
void elementWasRemoved(Element&);
RefPtr<PointerEvent> pointerEventForMouseEvent(const MouseEvent&, PointerID, const String& pointerType);
#if ENABLE(TOUCH_EVENTS) && (PLATFORM(IOS_FAMILY) || PLATFORM(WPE))
void dispatchEventForTouchAtIndex(EventTarget&, const PlatformTouchEvent&, unsigned, bool isPrimary, WindowProxy&, const IntPoint&);
#endif
WEBCORE_EXPORT void touchWithIdentifierWasRemoved(PointerID);
bool hasCancelledPointerEventForIdentifier(PointerID) const;
bool preventsCompatibilityMouseEventsForIdentifier(PointerID) const;
void dispatchEvent(PointerEvent&, EventTarget*);
WEBCORE_EXPORT void cancelPointer(PointerID, const IntPoint&);
void processPendingPointerCapture(PointerID);
private:
struct CapturingData : public RefCounted<CapturingData> {
static Ref<CapturingData> create(const String& pointerType)
{
return adoptRef(*new CapturingData(pointerType));
}
RefPtr<Element> pendingTargetOverride;
RefPtr<Element> targetOverride;
#if ENABLE(TOUCH_EVENTS) && (PLATFORM(IOS_FAMILY) || PLATFORM(WPE))
RefPtr<Element> previousTarget;
#endif
bool hasAnyElement() const {
return pendingTargetOverride || targetOverride
#if ENABLE(TOUCH_EVENTS) && (PLATFORM(IOS_FAMILY) || PLATFORM(WPE))
|| previousTarget
#endif
;
}
String pointerType;
enum class State : uint8_t {
Ready,
Finished,
Cancelled,
};
State state { State::Ready };
bool isPrimary { false };
bool preventsCompatibilityMouseEvents { false };
bool pointerIsPressed { false };
short previousMouseButton { -1 };
private:
CapturingData(const String& pointerType)
: pointerType(pointerType)
{ }
};
Ref<CapturingData> ensureCapturingDataForPointerEvent(const PointerEvent&);
void pointerEventWillBeDispatched(const PointerEvent&, EventTarget*);
void pointerEventWasDispatched(const PointerEvent&);
void updateHaveAnyCapturingElement();
void elementWasRemovedSlow(Element&);
Page& m_page;
// While PointerID is defined as int32_t, we use int64_t here so that we may use a value outside of the int32_t range to have safe
// empty and removed values, allowing any int32_t to be provided through the API for lookup in this hashmap.
using PointerIdToCapturingDataMap = HashMap<int64_t, Ref<CapturingData>, IntHash<int64_t>, WTF::SignedWithZeroKeyHashTraits<int64_t>>;
PointerIdToCapturingDataMap m_activePointerIdsToCapturingData;
bool m_processingPendingPointerCapture { false };
bool m_haveAnyCapturingElement { false };
};
inline void PointerCaptureController::elementWasRemoved(Element& element)
{
if (m_haveAnyCapturingElement)
elementWasRemovedSlow(element);
}
} // namespace WebCore
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