/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
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 * The contents of this file are subject to the Netscape Public License
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 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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 * The Original Code is mozilla.org code.
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 * The Initial Developer of the Original Code is 
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 * the Initial Developer. All Rights Reserved.
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 *
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 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#ifndef nsJISx4501LineBreaker_h__
#define nsJISx4501LineBreaker_h__


#include "nsILineBreaker.h"

class nsJISx4051LineBreaker : public nsILineBreaker
{
  NS_DECL_ISUPPORTS

public:
  nsJISx4051LineBreaker(const PRUnichar *aNoBegin, PRInt32 aNoBeginLen, 
                        const PRUnichar* aNoEnd, PRInt32 aNoEndLen);
  virtual ~nsJISx4051LineBreaker();

  NS_IMETHOD BreakInBetween(const PRUnichar* aText1 , PRUint32 aTextLen1,
                            const PRUnichar* aText2 , PRUint32 aTextLen2,
                            PRBool *oCanBreak);

  NS_IMETHOD Next( const PRUnichar* aText, PRUint32 aLen, PRUint32 aPos,
                   PRUint32* oNext, PRBool *oNeedMoreText);

  NS_IMETHOD Prev( const PRUnichar* aText, PRUint32 aLen, PRUint32 aPos,
                   PRUint32* oPrev, PRBool *oNeedMoreText);


protected:

  PRInt8   GetClass(PRUnichar u);
  PRInt8   ContextualAnalysis(PRUnichar prev, PRUnichar cur, PRUnichar next );
  PRBool   GetPair(PRInt8 c1, PRInt8 c2);

};

#endif  /* nsJISx4501LineBreaker_h__ */