WebCore/EventListener.h

   1 /*
   2  * Copyright (C) 2006, 2008, 2009 Apple Inc. All rights reserved.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public License
  15  * along with this library; see the file COPYING.LIB.  If not, write to
  16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA 02110-1301, USA.
  18  *
  19  */
  20
  21 #ifndef EventListener_h
  22 #define EventListener_h
  23
  24 #include <wtf/RefCounted.h>
  25
  26 namespace JSC {
  27     class JSObject;
  28 }
  29
  30 namespace WebCore {
  31
  32     class Event;
  33
  34     class EventListener : public RefCounted<EventListener> {
  35     public:
  36         virtual ~EventListener() { }
  37         virtual void handleEvent(Event*, bool isWindowEvent = false) = 0;
  38         virtual bool wasCreatedFromMarkup() const { return false; }
  39
  40 #if USE(JSC)
  41         virtual JSC::JSObject* function() const { return 0; }
  42         virtual void mark() { }
  43 #endif
  44
  45         bool isInline() const { return virtualIsInline(); }
  46
  47     private:
  48         virtual bool virtualIsInline() const { return false; }
  49     };
  50
  51     inline void markIfNotNull(EventListener* listener) { if (listener) listener->mark(); }
  52
  53 }
  54
  55 #endif