/* -*- 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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 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
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 * The Initial Developer of the Original Code is
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/* 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 {
public:
  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IRANGEUTILS_IID)

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

#endif /* nsIRangeUtils_h___ */

