gecko-dev/dom/public/nsIJSEventListener.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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* 1.1 (the "License"); you may not use this file except in compliance with
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* The Original Code is mozilla.org code.
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* The Initial Developer of the Original Code is
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* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
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* Contributor(s):
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#ifndef nsIJSEventListener_h__
#define nsIJSEventListener_h__
#include "nsIScriptContext.h"
class nsIScriptObjectOwner;
class nsIDOMEventListener;
class nsIAtom;
struct JSObject;
#define NS_IJSEVENTLISTENER_IID \
{ 0xa6cf9118, 0x15b3, 0x11d2, \
{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
// Implemented by JS event listeners. Used to retrieve the
// JSObject corresponding to the event target.
class nsIJSEventListener : public nsISupports
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_IJSEVENTLISTENER_IID)
nsIJSEventListener(nsIScriptContext *aContext, JSObject *aScopeObject,
nsISupports *aTarget)
: mContext(aContext), mScopeObject(aScopeObject), mTarget(aTarget)
{
// mTarget is a weak reference. We are guaranteed because of the
// ownership model that the target will be freed (and the
// references dropped) before either the context or the owner goes
// away.
NS_IF_ADDREF(mContext);
}
nsIScriptContext *GetEventContext()
{
return mContext;
}
nsISupports *GetEventTarget()
{
return mTarget;
}
JSObject *GetEventScope()
{
return mScopeObject;
}
virtual void SetEventName(nsIAtom* aName) = 0;
protected:
~nsIJSEventListener()
{
NS_IF_RELEASE(mContext);
}
nsIScriptContext *mContext;
JSObject *mScopeObject;
nsISupports *mTarget;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIJSEventListener, NS_IJSEVENTLISTENER_IID)
/* factory function */
nsresult NS_NewJSEventListener(nsIScriptContext *aContext,
JSObject *aScopeObject, nsISupports *aObject,
nsIDOMEventListener **aReturn);
#endif // nsIJSEventListener_h__