/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 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.
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 * Contributor(s):
 *
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 * 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
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#ifndef nsImportTranslator_h___
#define nsImportTranslator_h___

#include "nscore.h"
#include "nsStringGlue.h"
#include "nsCOMPtr.h"

class ImportOutFile;

class UMimeEncode {
public:
  static PRUint32  GetBufferSize( PRUint32 inByes);
  static PRUint32  ConvertBuffer( const PRUint8 * pIn, PRUint32 inLen, PRUint8 *pOut, PRUint32 maxLen = 72, PRUint32 firstLineLen = 72, const char * pEolStr = nsnull);
};


class nsImportTranslator {
public:
  virtual ~nsImportTranslator() {}
  virtual bool      Supports8bitEncoding( void) { return( false);}
  virtual PRUint32  GetMaxBufferSize( PRUint32 inLen) { return( inLen + 1);}
  virtual void    ConvertBuffer( const PRUint8 * pIn, PRUint32 inLen, PRUint8 * pOut) { memcpy( pOut, pIn, inLen); pOut[inLen] = 0;}
  virtual bool      ConvertToFile( const PRUint8 * pIn, PRUint32 inLen, ImportOutFile *pOutFile, PRUint32 *pProcessed = nsnull);
  virtual bool      FinishConvertToFile( ImportOutFile * /* pOutFile */) { return( true);}

  virtual void  GetCharset( nsCString& charSet) { charSet = "us-ascii";}
  virtual void  GetLanguage( nsCString& lang) { lang = "en";}
  virtual void  GetEncoding( nsCString& encoding) { encoding.Truncate();}
};

// Specialized encoder, not a vaild language translator, used for Mime headers.
// rfc2231
class CMHTranslator : public nsImportTranslator {
public:
  virtual PRUint32  GetMaxBufferSize( PRUint32 inLen) { return( (inLen * 3) + 1);}
  virtual void    ConvertBuffer( const PRUint8 * pIn, PRUint32 inLen, PRUint8 * pOut);
  virtual bool      ConvertToFile( const PRUint8 * pIn, PRUint32 inLen, ImportOutFile *pOutFile, PRUint32 *pProcessed = nsnull);
};

// Specialized encoder, not a vaild language translator, used for mail headers
// rfc2047
class C2047Translator : public nsImportTranslator {
public:
  virtual ~C2047Translator() {}

  C2047Translator( const char *pCharset, PRUint32 headerLen) { m_charset = pCharset; m_startLen = headerLen; m_useQuotedPrintable = PR_FALSE;}

  void  SetUseQuotedPrintable( void) { m_useQuotedPrintable = PR_TRUE;}

  virtual bool    ConvertToFile( const PRUint8 * pIn, PRUint32 inLen, ImportOutFile *pOutFile, PRUint32 *pProcessed = nsnull);
  bool    ConvertToFileQ( const PRUint8 * pIn, PRUint32 inLen, ImportOutFile *pOutFile, PRUint32 *pProcessed);

protected:
  bool        m_useQuotedPrintable;
  nsCString    m_charset;
  PRUint32    m_startLen;
};

#endif /* nsImportTranslator_h__ */

