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/*
* Copyright (C) 2006, 2007, 2008, 2009 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
* OWNER 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 V8AbstractEventListener_h
#define V8AbstractEventListener_h
#include "EventListener.h"
#include <v8.h>
namespace WebCore {
class Event;
class Frame;
// There are two kinds of event listeners: HTML or non-HMTL. onload, onfocus, etc (attributes) are always HTML event handler type;
// Event listeners added by Window.addEventListener or EventTargetNode::addEventListener are non-HTML type.
//
// Why does this matter?
// WebKit does not allow duplicated HTML event handlers of the same type, but ALLOWs duplicated non-HTML event handlers.
class V8AbstractEventListener : public EventListener {
public:
virtual ~V8AbstractEventListener() { }
// Returns the owner frame of the listener.
Frame* frame() { return m_frame; }
virtual void handleEvent(Event*, bool isWindowEvent);
void invokeEventHandler(v8::Handle<v8::Context>, Event*, v8::Handle<v8::Value> jsEvent, bool isWindowEvent);
// Returns the listener object, either a function or an object.
virtual v8::Local<v8::Object> getListenerObject()
{
return v8::Local<v8::Object>::New(m_listener);
}
// Dispose listener object and clear the handle.
void disposeListenerObject();
virtual bool disconnected() const { return !m_frame; }
protected:
v8::Persistent<v8::Object> m_listener;
// Indicates if this is an HTML type listener.
bool m_isInline;
private:
V8AbstractEventListener(Frame*, bool isInline);
virtual v8::Local<v8::Value> callListenerFunction(v8::Handle<v8::Value> jsevent, Event*, bool isWindowEvent) = 0;
// Get the receiver object to use for event listener call.
v8::Local<v8::Object> getReceiverObject(Event*, bool isWindowEvent);
// Frame to which the event listener is attached to. An event listener must be destroyed before its owner frame is
// deleted. See fast/dom/replaceChild.html
// FIXME: this could hold m_frame live until the event listener is deleted.
Frame* m_frame;
// Position in the HTML source for HTML event listeners.
int m_lineNumber;
int m_columnNumber;
friend class V8EventListener;
friend class V8ObjectEventListener;
friend class V8LazyEventListener;
};
} // namespace WebCore
#endif // V8AbstractEventListener_h
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