1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/textandloc/textrendering/texthandling/stext/TXTPLAIN.H	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,137 @@
     1.4 +/*
     1.5 +* Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.6 +* All rights reserved.
     1.7 +* This component and the accompanying materials are made available
     1.8 +* under the terms of "Eclipse Public License v1.0"
     1.9 +* which accompanies this distribution, and is available
    1.10 +* at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.11 +*
    1.12 +* Initial Contributors:
    1.13 +* Nokia Corporation - initial contribution.
    1.14 +*
    1.15 +* Contributors:
    1.16 +*
    1.17 +* Description: 
    1.18 +* Header for the classes that import and export plain text into and out of ETEXT.
    1.19 +*
    1.20 +*/
    1.21 +
    1.22 +
    1.23 +#ifndef __TXTPLAIN__
    1.24 +#define __TXTPLAIN__ 1
    1.25 +
    1.26 +#include <e32std.h>
    1.27 +#include <s32mem.h>
    1.28 +#include <txtetext.h>
    1.29 +#include "TxtWriter.h"
    1.30 +
    1.31 +class CCnvCharacterSetConverter;
    1.32 +class TPlainTextIOState;
    1.33 +
    1.34 +NONSHARABLE_CLASS(CPlainTextConverter) : public CBase
    1.35 +/**
    1.36 +@internalComponent
    1.37 +*/
    1.38 +	{
    1.39 +	public:
    1.40 +	static CPlainTextConverter* NewLC();
    1.41 +	~CPlainTextConverter();
    1.42 +	void PrepareToConvertL(TPlainTextIOState& aState,const TDesC8* aSample);
    1.43 +
    1.44 +	enum
    1.45 +		{
    1.46 +		EConversionBufferSize = 1024
    1.47 +		};
    1.48 +
    1.49 +	CCnvCharacterSetConverter* iConverter;	// use this converter to translate input or output
    1.50 +	TUint8* iConversionBuffer;				// the buffer used by iConverter for non-Unicode text
    1.51 +	TInt iConversionBufferLength;			// current number of characters in the conversion buffer
    1.52 +	};
    1.53 +
    1.54 +class TPlainTextIOState
    1.55 +/**
    1.56 +@internalComponent
    1.57 +*/
    1.58 +	{
    1.59 +	public:
    1.60 +	TPlainTextIOState(const CPlainText::TImportExportParam& aParam,CPlainText::TImportExportResult& aResult,
    1.61 +					  RWriteStream& aOutput,RReadStream& aInput);
    1.62 +	TBool Finished() const
    1.63 +		{ return iResult.iOutputChars >= iParam.iMaxOutputChars || iResult.iInputChars >= iParam.iMaxInputChars; }
    1.64 +	TText ReadRawCharL();
    1.65 +	void WriteRawCharL(TText aChar);
    1.66 +
    1.67 +	const CPlainText::TImportExportParam& iParam;
    1.68 +	CPlainText::TImportExportResult& iResult;
    1.69 +	RWriteStream& iOutput;
    1.70 +	RReadStream& iInput;
    1.71 +	CPlainTextConverter* iConverter;// if non-null, use CHARCONV, via this object, to convert a
    1.72 +									// foreign encoding to or from Unicode
    1.73 +	TBool iSwapInput;				// input needs to be byte-swapped
    1.74 +	TBool iCheckByteOrder;			// flip iSwapInput if the next input character is 0xFFFE (byte-swapped byte order mark)
    1.75 +	};
    1.76 +
    1.77 +class TPlainTextWriter: public TPlainTextIOState
    1.78 +/**
    1.79 +@internalComponent
    1.80 +*/
    1.81 +	{
    1.82 +	public:
    1.83 +	static void TranslateL(const CPlainText::TImportExportParam& aParam,CPlainText::TImportExportResult& aResult,
    1.84 +						   RWriteStream& aOutput,RReadStream& aInput);
    1.85 +
    1.86 +	private:
    1.87 +	TPlainTextWriter(const CPlainText::TImportExportParam& aParam,CPlainText::TImportExportResult& aResult,
    1.88 +					 RWriteStream& aOutput,RReadStream& aInput);
    1.89 +	void TranslateHelperL();
    1.90 +
    1.91 +	enum
    1.92 +		{
    1.93 +		EDefaultLineBufferSize = CPlainTextConverter::EConversionBufferSize * 2
    1.94 +		};
    1.95 +
    1.96 +	void TranslateToEofL();
    1.97 +	void FlushL();
    1.98 +	void WriteCharL(TText aChar);
    1.99 +	void WriteNewLineL();
   1.100 +	void WriteAndConvertL(const TText* aText,TInt aLength);
   1.101 +
   1.102 +	RBufReadStream iBufReadStream;	// a stream over the input buffer
   1.103 +	TInt iMaxLineLength;			// wrap lines automatically if they exceed this length
   1.104 +	TInt iLineLength;				// length of the current line
   1.105 +	TText* iLineBuffer;				// if non-null, this buffer contains the current line, or Unicode text
   1.106 +									// to be converted to a foreign encoding
   1.107 +	TInt iMaxLineBufferLength;		// maximum number of characters in iLineBuffer
   1.108 +	};
   1.109 +
   1.110 +/**
   1.111 +@internalComponent
   1.112 +*/
   1.113 +NONSHARABLE_CLASS(TPlainTextReader) : public TPlainTextIOState, public MOutputChar
   1.114 +	{
   1.115 +	public:
   1.116 +	static void TranslateL(const CPlainText::TImportExportParam& aParam,CPlainText::TImportExportResult& aResult,
   1.117 +						   RWriteStream& aOutput,RReadStream& aInput);
   1.118 +
   1.119 +	private:
   1.120 +	TPlainTextReader(const CPlainText::TImportExportParam& aParam,CPlainText::TImportExportResult& aResult,
   1.121 +					 RWriteStream& aOutput,RReadStream& aInput);
   1.122 +	void TranslateHelperL(TSLBTransaltor& aSLBTranslator);
   1.123 +
   1.124 +	enum
   1.125 +		{
   1.126 +		EInputBufferSize = CPlainTextConverter::EConversionBufferSize * 2
   1.127 +		};
   1.128 +
   1.129 +	void TranslateToEofL(TSLBTransaltor& aSLBTranslator);
   1.130 +	TText ReadAndConvertL();
   1.131 +	virtual void OutputCharL(TText aChar);
   1.132 +
   1.133 +	TText* iInputBuffer;				// if non-null, this buffer contains Unicode text
   1.134 +										// converted from a foreign encoding
   1.135 +	TInt iInputLength;					// number of characters currently stored in iInputBuffer
   1.136 +	TInt iInputPos;						// current position in iInputBuffer;
   1.137 +	TInt iConversionState;				// state used by iConverter when converting to Unicode
   1.138 +	};
   1.139 +
   1.140 +#endif // __TXTPLAIN__