/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * Original Author: David W. Hyatt (hyatt@netscape.com)
 *
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the NPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef nsXBLScrollHandler_h__
#define nsXBLScrollHandler_h__

#include "nsIDOMScrollListener.h"
#include "nsXBLEventHandler.h"

class nsIXBLBinding;
class nsIDOMEvent;
class nsIContent;
class nsIDOMUIEvent;
class nsIAtom;
class nsIController;
class nsIXBLPrototypeHandler;

class nsXBLScrollHandler : public nsIDOMScrollListener, 
                           public nsXBLEventHandler
{
public:
  nsXBLScrollHandler(nsIDOMEventReceiver* aReceiver, nsIXBLPrototypeHandler* aHandler);
  virtual ~nsXBLScrollHandler();
  
  // nsIDOMetc.
  NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent) { return NS_OK; };
  
  NS_IMETHOD Overflow(nsIDOMEvent* aEvent);
  NS_IMETHOD Underflow(nsIDOMEvent* aEvent);
  NS_IMETHOD OverflowChanged(nsIDOMEvent* aEvent);
   
  NS_DECL_ISUPPORTS_INHERITED

protected:
  static PRUint32 gRefCnt;
  static nsIAtom* kOverflowAtom;
  static nsIAtom* kUnderflowAtom;
  static nsIAtom* kOverflowChangedAtom;

protected:
  // Members
};

extern nsresult
NS_NewXBLScrollHandler(nsIDOMEventReceiver* aEventReceiver, nsIXBLPrototypeHandler* aHandlerElement, 
                       nsXBLScrollHandler** aResult);


#endif