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      1 /*
      2  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
      3  * Copyright (C) 2006 James G. Speth (speth (at) end.com)
      4  * Copyright (C) 2006 Samuel Weinig (sam.weinig (at) gmail.com)
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     22  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     23  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #import "config.h"
     29 #import "ObjCEventListener.h"
     30 
     31 #import "DOMEventInternal.h"
     32 #import "DOMEventListener.h"
     33 #import "Event.h"
     34 #import "EventListener.h"
     35 #import "JSMainThreadExecState.h"
     36 #import <wtf/HashMap.h>
     37 
     38 namespace WebCore {
     39 
     40 typedef HashMap<id, ObjCEventListener*> ListenerMap;
     41 static ListenerMap* listenerMap;
     42 
     43 ObjCEventListener* ObjCEventListener::find(ObjCListener listener)
     44 {
     45     ListenerMap* map = listenerMap;
     46     if (!map)
     47         return 0;
     48     return map->get(listener);
     49 }
     50 
     51 PassRefPtr<ObjCEventListener> ObjCEventListener::wrap(ObjCListener listener)
     52 {
     53     RefPtr<ObjCEventListener> wrapper = find(listener);
     54     if (wrapper)
     55         return wrapper;
     56     return adoptRef(new ObjCEventListener(listener));
     57 }
     58 
     59 ObjCEventListener::ObjCEventListener(ObjCListener listener)
     60     : EventListener(ObjCEventListenerType)
     61     , m_listener(listener)
     62 {
     63     ListenerMap* map = listenerMap;
     64     if (!map) {
     65         map = new ListenerMap;
     66         listenerMap = map;
     67     }
     68     map->set(listener, this);
     69 }
     70 
     71 ObjCEventListener::~ObjCEventListener()
     72 {
     73     listenerMap->remove(m_listener.get());
     74 }
     75 
     76 void ObjCEventListener::handleEvent(ScriptExecutionContext*, Event* event)
     77 {
     78     ObjCListener listener = m_listener.get();
     79     [listener handleEvent:kit(event)];
     80 }
     81 
     82 bool ObjCEventListener::operator==(const EventListener& listener)
     83 {
     84     if (const ObjCEventListener* objCEventListener = ObjCEventListener::cast(&listener))
     85         return m_listener == objCEventListener->m_listener;
     86     return false;
     87 }
     88 
     89 } // namespace WebCore
     90