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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.
 *
 * 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 ***** */

/* utilities for regression tests based on frame tree comparison */

#ifndef nsIFrameUtil_h___
#define nsIFrameUtil_h___

#include <stdio.h>
#include "nsISupports.h"

/* a6cf90d4-15b3-11d2-932e-00805f8add32 */
#define NS_IFRAME_UTIL_IID \
 { 0xa6cf90d6, 0x15b3, 0x11d2,{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}

/**
 * Frame utility interface
 */
class nsIFrameUtil : public nsISupports {
public:
  NS_DECLARE_STATIC_IID_ACCESSOR(NS_IFRAME_UTIL_IID)
  /**
   * Compare two regression data dumps. The return status will be NS_OK
   * if the trees compare favoribly, otherwise the return will indicate
   * NS_ERROR_FAILURE. Other return status's will indicate some other
   * type of failure. The files, aFile1 and aFile2 are closed before
   * returning. 
   * aRegressionOutput will vary output, 0 is full output, 1 is brief
   */
  NS_IMETHOD CompareRegressionData(FILE* aFile1, FILE* aFile2,PRInt32 aRegressionOuput) = 0;

  /**
   * Display the regression dump data stored in aInputFile1 to
   * aOutputFile . The file is closed before returning. If the
   * regression data is in error somehow then NS_ERROR_FAILURE will be
   * returned.
   */
  NS_IMETHOD DumpRegressionData(FILE* aInputFile, FILE* aOutputFile) = 0;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsIFrameUtil, NS_IFRAME_UTIL_IID)

#endif /* nsIFrameUtil_h___ */