third_party/WebKit/Source/core/events/NodeEventContext.h

/*
 * Copyright (C) 2014 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 NodeEventContext_h
#define NodeEventContext_h

#include "core/CoreExport.h"
#include "core/events/TreeScopeEventContext.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefPtr.h"

namespace blink {

class EventTarget;
class Node;
class TouchEventContext;

class CORE_EXPORT NodeEventContext {
  DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();

 public:
  // FIXME: Use ContainerNode instead of Node.
  NodeEventContext(Node*, EventTarget* currentTarget);
  DECLARE_TRACE();

  Node* node() const { return m_node.get(); }

  void setTreeScopeEventContext(TreeScopeEventContext* treeScopeEventContext) {
    m_treeScopeEventContext = treeScopeEventContext;
  }
  TreeScopeEventContext& treeScopeEventContext() {
    DCHECK(m_treeScopeEventContext);
    return *m_treeScopeEventContext;
  }

  EventTarget* target() const { return m_treeScopeEventContext->target(); }
  EventTarget* relatedTarget() const {
    return m_treeScopeEventContext->relatedTarget();
  }
  TouchEventContext* touchEventContext() const {
    return m_treeScopeEventContext->touchEventContext();
  }

  bool currentTargetSameAsTarget() const {
    return m_currentTarget.get() == target();
  }
  void handleLocalEvents(Event&) const;

 private:
  Member<Node> m_node;
  Member<EventTarget> m_currentTarget;
  Member<TreeScopeEventContext> m_treeScopeEventContext;
};

}  // namespace blink

WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::NodeEventContext);

#endif  // NodeEventContext_h