1 // Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #include <e32std.h>

    17 #include <e32base.h>

    18 #include <f32file.h>

    19 #include <charconv.h>

    20 

    21 class CHtmlToCrtConvBuffer : public CBase

    22 	{

    23 	public:

    24 		static CHtmlToCrtConvBuffer* NewL(const TDesC& aFile, RFs& aFsSession, CCnvCharacterSetConverter& aCnvCharacterSetConverter);

    25 		~CHtmlToCrtConvBuffer();

    26 

    27 	/**

    28 		@fn		TBool ReadCharacterL(TChar& aCharacter, TInt& aBufferPosition, TBool& aEndOfBuffer)		

    29 		Intended Usage	: gets next character from the file

    30 		@param	aCharacter the character which was read

    31 		@param	aBufferPosition	the current buffer position

    32 		@param	aEndOfBuffer	ETrue if end of buffer reached, else EFalse

    33 		@return	TBool ETrue if character read, else EFalse

    34 	 */

    35 		TBool ReadCharacterL(TChar& aCharacter, TInt& aBufferPosition, TBool& aEndOfBuffer);

    36 		void GetPartOfBufferL(TPtrC16& aPartOfBuffer, TInt aStartPosition, TInt aEndPosition) const;

    37 		void GetToEndOfBufferL(TPtrC16& aPartOfBuffer, TInt aStartPosition) const;

    38 	/**

    39 		@fn		GetSampleOfTextFromFileL(TDes8& aSample, TInt aLength, TInt aOffset)

    40 		Intended Usage	:	reads the specified number of characters from the file at a specified offset 

    41 		@param	aSample	descriptor into which characters are read

    42 		@param	aLength	number of characters to be read

    43 		@param	aOffset	offset from start of file

    44 		@return	void

    45 	 */

    46 		void GetSampleOfTextFromFileL(TDes8& aSample, TInt aLength, TInt aOffset);

    47 		void ResetL();

    48 

    49 	private:

    50 		CHtmlToCrtConvBuffer(CCnvCharacterSetConverter& aCnvCharacterSetConverter);

    51 		void ConstructL(const TDesC& aFile, RFs& aFsSession);

    52 	/**

    53 		@fn		TBool FillBufferL()

    54 		Intended Usage	:	used to read characters from the file into the buffer 

    55 		@return	TBool EFalse if no characters read from file, else Etrue

    56 	 */

    57 		TBool FillBufferL();

    58 		void DoConvertBufferL(TPtr8& aSourcePtr, TPtr16& aUnicodePtr, TInt& aLength, TBool& aEndOfFile);

    59 

    60 	private:

    61 		CCnvCharacterSetConverter& iCnvCharacterSetConverter;

    62 		TInt iState;

    63 		RFile iFile;

    64 		HBufC8* iSourceBuffer;

    65 		HBufC16* iUnicodeBuffer;

    66 		TInt iBufferPosition;

    67 	};