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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 Communicator client code, released
 * March 31, 1998.
 * 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):
 * 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 ***** */

/* A class for range utilities. */

#ifndef nsIRangeUtils_h___
#define nsIRangeUtils_h___

#include "nsISupports.h"

// Forward declarations
class nsIDOMRange;
class nsIDOMNode;
class nsIContent;

// IID for the nsIRangeUtils interface
#define NS_IRANGEUTILS_IID       \
{ 0xa6cf9127, 0x15b3, 0x11d2, {0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }

class nsIRangeUtils : public nsISupports {

  NS_IMETHOD_(PRInt32) ComparePoints(nsIDOMNode* aParent1, PRInt32 aOffset1,
                                     nsIDOMNode* aParent2, PRInt32 aOffset2) = 0;
  NS_IMETHOD CompareNodeToRange(nsIContent* aNode, 
                                nsIDOMRange* aRange,
                                PRBool *outNodeBefore,
                                PRBool *outNodeAfter) = 0;


#endif /* nsIRangeUtils_h___ */

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