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/*
* Copyright (C) 2010 Google 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. ``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
* 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 "Node.h"
namespace WebCore {
class TouchList;
class EventContext {
WTF_MAKE_FAST_ALLOCATED;
public:
// FIXME: Use ContainerNode instead of Node.
EventContext(Node*, EventTarget* currentTarget, EventTarget*);
virtual ~EventContext();
Node* node() const { return m_node.get(); }
EventTarget* currentTarget() const { return m_currentTarget.get(); }
EventTarget* target() const { return m_target.get(); }
bool currentTargetSameAsTarget() const { return m_currentTarget.get() == m_target.get(); }
virtual void handleLocalEvents(Event&) const;
virtual bool isMouseOrFocusEventContext() const;
virtual bool isTouchEventContext() const;
protected:
#if !ASSERT_DISABLED
bool isUnreachableNode(EventTarget*) const;
#endif
RefPtr<Node> m_node;
RefPtr<EventTarget> m_currentTarget;
RefPtr<EventTarget> m_target;
};
class MouseOrFocusEventContext final : public EventContext {
public:
MouseOrFocusEventContext(Node*, EventTarget* currentTarget, EventTarget*);
virtual ~MouseOrFocusEventContext();
Node* relatedTarget() const { return m_relatedTarget.get(); }
void setRelatedTarget(Node*);
private:
void handleLocalEvents(Event&) const final;
bool isMouseOrFocusEventContext() const final;
RefPtr<Node> m_relatedTarget;
};
#if ENABLE(TOUCH_EVENTS)
class TouchEventContext final : public EventContext {
public:
TouchEventContext(Node*, EventTarget* currentTarget, EventTarget*);
virtual ~TouchEventContext();
void handleLocalEvents(Event&) const override;
bool isTouchEventContext() const override;
enum TouchListType { Touches, TargetTouches, ChangedTouches, NotTouchList };
TouchList* touchList(TouchListType);
TouchList* touches() { return m_touches.get(); }
TouchList* targetTouches() { return m_targetTouches.get(); }
TouchList* changedTouches() { return m_changedTouches.get(); }
private:
#if !ASSERT_DISABLED
void checkReachability(TouchList*) const;
#endif
RefPtr<TouchList> m_touches;
RefPtr<TouchList> m_targetTouches;
RefPtr<TouchList> m_changedTouches;
};
#endif // ENABLE(TOUCH_EVENTS)
#if !ASSERT_DISABLED
inline bool EventContext::isUnreachableNode(EventTarget* target) const
{
// FIXME: Checks also for SVG elements.
return target && target->toNode() && !target->toNode()->isSVGElement() && m_node->isClosedShadowHidden(*target->toNode());
}
#endif
inline void MouseOrFocusEventContext::setRelatedTarget(Node* relatedTarget)
{
ASSERT(!isUnreachableNode(relatedTarget));
m_relatedTarget = relatedTarget;
}
#if ENABLE(TOUCH_EVENTS)
inline TouchList* TouchEventContext::touchList(TouchListType type)
{
switch (type) {
case Touches:
return m_touches.get();
case TargetTouches:
return m_targetTouches.get();
case ChangedTouches:
return m_changedTouches.get();
case NotTouchList:
break;
}
ASSERT_NOT_REACHED();
return nullptr;
}
#endif
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::MouseOrFocusEventContext)
static bool isType(const WebCore::EventContext& context) { return context.isMouseOrFocusEventContext(); }
SPECIALIZE_TYPE_TRAITS_END()
#if ENABLE(TOUCH_EVENTS)
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::TouchEventContext)
static bool isType(const WebCore::EventContext& context) { return context.isTouchEventContext(); }
SPECIALIZE_TYPE_TRAITS_END()
#endif
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