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nsImportTranslator.h
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
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00007  * the License. You may obtain a copy of the License at
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00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either of the GNU General Public License Version 2 or later (the "GPL"),
00026  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
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00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #ifndef nsImportTranslator_h___
00039 #define nsImportTranslator_h___
00040 
00041 #include "nscore.h"
00042 #include "nsString.h"
00043 #include "nsCRT.h"
00044 
00045 class ImportOutFile;
00046 
00047 class UMimeEncode {
00048 public:
00049        static PRUint32      GetBufferSize( PRUint32 inByes);
00050        static PRUint32      ConvertBuffer( const PRUint8 * pIn, PRUint32 inLen, PRUint8 *pOut, PRUint32 maxLen = 72, PRUint32 firstLineLen = 72, const char * pEolStr = nsnull);
00051 };
00052 
00053 
00054 class nsImportTranslator {
00055 public:
00056        virtual ~nsImportTranslator() {}
00057        virtual PRBool              Supports8bitEncoding( void) { return( PR_FALSE);}
00058        virtual PRUint32     GetMaxBufferSize( PRUint32 inLen) { return( inLen + 1);}
00059        virtual void         ConvertBuffer( const PRUint8 * pIn, PRUint32 inLen, PRUint8 * pOut) { memcpy( pOut, pIn, inLen); pOut[inLen] = 0;}
00060        virtual PRBool              ConvertToFile( const PRUint8 * pIn, PRUint32 inLen, ImportOutFile *pOutFile, PRUint32 *pProcessed = nsnull);
00061        virtual PRBool              FinishConvertToFile( ImportOutFile * /* pOutFile */) { return( PR_TRUE);}
00062 
00063        virtual void  GetCharset( nsCString& charSet) { charSet = "us-ascii";}
00064        virtual void  GetLanguage( nsCString& lang) { lang = "en";}
00065        virtual void  GetEncoding( nsCString& encoding) { encoding.Truncate();}
00066 };
00067 
00068 // Specialized encoder, not a vaild language translator, used for Mime headers.
00069 // rfc2231
00070 class CMHTranslator : public nsImportTranslator {
00071 public:
00072        virtual PRUint32     GetMaxBufferSize( PRUint32 inLen) { return( (inLen * 3) + 1);}
00073        virtual void         ConvertBuffer( const PRUint8 * pIn, PRUint32 inLen, PRUint8 * pOut);
00074        virtual PRBool              ConvertToFile( const PRUint8 * pIn, PRUint32 inLen, ImportOutFile *pOutFile, PRUint32 *pProcessed = nsnull);
00075 };
00076 
00077 // Specialized encoder, not a vaild language translator, used for mail headers
00078 // rfc2047
00079 class C2047Translator : public nsImportTranslator {
00080 public:
00081        virtual ~C2047Translator() {}
00082 
00083        C2047Translator( const char *pCharset, PRUint32 headerLen) { m_charset = pCharset; m_startLen = headerLen; m_useQuotedPrintable = PR_FALSE;}
00084 
00085        void   SetUseQuotedPrintable( void) { m_useQuotedPrintable = PR_TRUE;}
00086 
00087        virtual PRBool       ConvertToFile( const PRUint8 * pIn, PRUint32 inLen, ImportOutFile *pOutFile, PRUint32 *pProcessed = nsnull);
00088        PRBool ConvertToFileQ( const PRUint8 * pIn, PRUint32 inLen, ImportOutFile *pOutFile, PRUint32 *pProcessed);
00089 
00090 protected:
00091        PRBool               m_useQuotedPrintable;
00092        nsCString            m_charset;
00093        PRUint32             m_startLen;
00094 };
00095 
00096 #endif /* nsImportTranslator_h__ */
00097