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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 * The contents of this file are subject to the Mozilla 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/MPL/
 * 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.org 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):
 *   John Gaunt (jgaunt@netscape.com)
 * Alternatively, the contents of this file may be used under the terms of
 * either of 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 MPL, 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 MPL, the GPL or the LGPL.
 * ***** END LICENSE BLOCK ***** */

#ifndef __nsAccessibilityService_h__
#define __nsAccessibilityService_h__

#include "nsIAccessibilityService.h"
#include "nsIObserver.h"
#include "nsIWebProgressListener.h"
#include "nsWeakReference.h"

class nsIFrame;
class nsIWeakReference;
class nsIDOMNode;
class nsObjectFrame;
class nsIDocShell;
class nsIPresShell;
class nsIContent;

class nsAccessibilityService : public nsIAccessibilityService, 
                               public nsIObserver,
                               public nsIWebProgressListener,
                               public nsSupportsWeakReference
  virtual ~nsAccessibilityService();


  static nsresult GetShellFromNode(nsIDOMNode *aNode, nsIWeakReference **weakShell);
  static nsresult GetAccessibilityService(nsIAccessibilityService** aResult);

  nsresult GetInfo(nsISupports* aFrame, nsIFrame** aRealFrame, nsIWeakReference** aShell, nsIDOMNode** aContent);
  void GetOwnerFor(nsIPresShell *aPresShell, nsIPresShell **aOwnerShell, nsIContent **aOwnerContent);
  nsIContent* FindContentForDocShell(nsIPresShell* aPresShell, nsIContent* aContent, nsIDocShell*  aDocShell);
  static nsAccessibilityService *gAccessibilityService;
  nsresult InitAccessible(nsIAccessible *aAccessibleIn, nsIAccessible **aAccessibleOut);
  PRBool GetRole(nsIContent *aContent, nsAString& aRole);

#endif /* __nsIAccessibilityService_h__ */

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