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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 "EventTarget.h"
#include "Node.h"
#include "TreeScope.h"
#include <wtf/RefPtr.h>
namespace WebCore {
class Event;
class EventContext {
public:
// FIXME: Use ContainerNode instead of Node.
EventContext(PassRefPtr<Node>, PassRefPtr<EventTarget> currentTarget, PassRefPtr<EventTarget> target);
Node* node() const;
EventTarget* target() const;
EventTarget* relatedTarget() const;
bool currentTargetSameAsTarget() const;
void handleLocalEvents(Event*) const;
void setRelatedTarget(PassRefPtr<EventTarget>);
private:
#ifndef NDEBUG
bool isUnreachableNode(EventTarget*);
bool isReachable(Node*);
#endif
RefPtr<Node> m_node;
RefPtr<EventTarget> m_currentTarget;
RefPtr<EventTarget> m_target;
RefPtr<EventTarget> m_relatedTarget;
};
inline Node* EventContext::node() const
{
return m_node.get();
}
inline EventTarget* EventContext::target() const
{
return m_target.get();
}
inline bool EventContext::currentTargetSameAsTarget() const
{
return m_currentTarget.get() == m_target.get();
}
inline EventTarget* EventContext::relatedTarget() const
{
return m_relatedTarget.get();
}
inline void EventContext::setRelatedTarget(PassRefPtr<EventTarget> relatedTarget)
{
ASSERT(!isUnreachableNode(relatedTarget.get()));
m_relatedTarget = relatedTarget;
}
#ifndef NDEBUG
inline bool EventContext::isUnreachableNode(EventTarget* target)
{
// FIXME: Checks also for SVG elements.
return target && target->toNode() && !target->toNode()->isSVGElement() && !isReachable(target->toNode());
}
inline bool EventContext::isReachable(Node* target)
{
ASSERT(target);
TreeScope* targetScope = target->treeScope();
for (TreeScope* scope = m_node->treeScope(); scope; scope = scope->parentTreeScope()) {
if (scope == targetScope)
return true;
}
return false;
}
#endif
}
#endif // EventContext_h
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