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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 COMPUTER, 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 COMPUTER, 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.
*
*/
#ifndef EventContext_h
#define EventContext_h
#include "core/events/EventTarget.h"
#include "core/dom/Node.h"
#include "core/dom/StaticNodeList.h"
#include "core/dom/TreeScope.h"
#include "wtf/RefPtr.h"
namespace WebCore {
class Event;
class TouchList;
class TouchEventContext : public RefCounted<TouchEventContext> {
public:
static PassRefPtr<TouchEventContext> create();
~TouchEventContext();
void handleLocalEvents(Event*) const;
TouchList* touches() { return m_touches.get(); }
TouchList* targetTouches() { return m_targetTouches.get(); }
TouchList* changedTouches() { return m_changedTouches.get(); }
private:
TouchEventContext();
RefPtr<TouchList> m_touches;
RefPtr<TouchList> m_targetTouches;
RefPtr<TouchList> m_changedTouches;
};
class EventContext {
public:
// FIXME: Use ContainerNode instead of Node.
EventContext(PassRefPtr<Node>, PassRefPtr<EventTarget> currentTarget);
~EventContext();
Node* node() const { return m_node.get(); }
EventTarget* currentTarget() const { return m_currentTarget.get(); }
EventTarget* target() const { return m_target.get(); }
void setTarget(PassRefPtr<EventTarget>);
EventTarget* relatedTarget() const { return m_relatedTarget.get(); }
void setRelatedTarget(PassRefPtr<EventTarget>);
TouchEventContext* touchEventContext() const { return m_touchEventContext.get(); }
TouchEventContext* ensureTouchEventContext();
PassRefPtr<NodeList> eventPath() const { return m_eventPath; }
void adoptEventPath(Vector<RefPtr<Node> >&);
void setEventPath(PassRefPtr<NodeList> nodeList) { m_eventPath = nodeList; }
bool currentTargetSameAsTarget() const { return m_currentTarget.get() == m_target.get(); }
void handleLocalEvents(Event*) const;
protected:
#ifndef NDEBUG
bool isUnreachableNode(EventTarget*);
#endif
RefPtr<Node> m_node;
RefPtr<EventTarget> m_currentTarget;
RefPtr<EventTarget> m_target;
RefPtr<EventTarget> m_relatedTarget;
RefPtr<NodeList> m_eventPath;
RefPtr<TouchEventContext> m_touchEventContext;
};
#ifndef NDEBUG
inline bool EventContext::isUnreachableNode(EventTarget* target)
{
// FIXME: Checks also for SVG elements.
return target && target->toNode() && !target->toNode()->isSVGElement() && !target->toNode()->treeScope().isInclusiveAncestorOf(m_node->treeScope());
}
#endif
inline void EventContext::setTarget(PassRefPtr<EventTarget> target)
{
ASSERT(!isUnreachableNode(target.get()));
m_target = target;
}
inline void EventContext::setRelatedTarget(PassRefPtr<EventTarget> relatedTarget)
{
ASSERT(!isUnreachableNode(relatedTarget.get()));
m_relatedTarget = relatedTarget;
}
}
#endif // EventContext_h
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