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

/*
 * Copyright (C) 2011 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
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 */

#ifndef EventDispatchMediator_h
#define EventDispatchMediator_h

#include "core/events/EventDispatchResult.h"
#include "platform/heap/Handle.h"

namespace blink {

class Event;
class EventDispatcher;

class EventDispatchMediator
    : public GarbageCollectedFinalized<EventDispatchMediator> {
 public:
  static EventDispatchMediator* create(Event*);
  virtual ~EventDispatchMediator() {}
  DECLARE_VIRTUAL_TRACE();
  virtual DispatchEventResult dispatchEvent(EventDispatcher&) const;
  Event& event() const { return *m_event; }

 protected:
  explicit EventDispatchMediator(Event*);
  EventDispatchMediator() {}
  void setEvent(Event* event) {
    DCHECK(event);
    m_event = event;
  }

 private:
  Member<Event> m_event;
};

}  // namespace blink

#endif  // EventDispatchMediator_h