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

// All rights reserved.

// This component and the accompanying materials are made available

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

// which accompanies this distribution, and is available

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

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

#ifndef __CHTMLTOCRTCONVPARSER_H__

#define __CHTMLTOCRTCONVPARSER_H__

#include <e32std.h>  

#include <txtfrmat.h>

#include "CHtmlToCrtConvHash.h"

class CRichText;

class CHtmlToCrtConvBuffer;

class CHtmlToCrtConvHashTable;

class CHtmlToCrtConvActionProcessor;

class MHtmlToCrtConvResourceFile;

const TInt KCharsProcessedInOneStep			= 100;

const TInt KTagBufferLength					= 10;

const TInt KAttributeBufferLength			= 10;

const TInt KEntityBufferLength				= 10;

//========================================================================

class CHtmlToCrtConvAttribute : public CBase

	{

	public:

		static CHtmlToCrtConvAttribute* NewLC(THtmlToCrtConvAttributeType aType, TDesC8& aValue);

		~CHtmlToCrtConvAttribute();

		inline const THtmlToCrtConvAttributeType Type() const {return iType;}

		inline const TDesC8& Value() const {return *iValue;}

	private:

		CHtmlToCrtConvAttribute(THtmlToCrtConvAttributeType aType);

		void ConstructL(TDesC8& aValue);

	private:

		THtmlToCrtConvAttributeType	iType;

		HBufC8*						iValue;

	};

//=========================================================================

class CHtmlToCrtConvParser : public CBase

	{

	public:

		enum TTagState

			{

			ENoTag,

			EOpeningTag,

			EClosingTag

			};

	public:

		static CHtmlToCrtConvParser* NewL(CRichText& aRichText, CHtmlToCrtConvBuffer& aBuffer, MHtmlToCrtConvResourceFile& aResourceFile);

		~CHtmlToCrtConvParser();

		TBool DoOneStepL();

	private:

		CHtmlToCrtConvParser(CHtmlToCrtConvBuffer& aBuffer);

		void ConstructL(CRichText& aRichText, MHtmlToCrtConvResourceFile& aResourceFile);

		TBool InspectCurrentCharacter(TChar aChar);

		void  DoActionL(TChar aChar);

		void  SeeWhiteSpaceCharacterInTag(TBool& aBool);

		void  SeeSpecialCharactersInTag(TChar aChar, TBool& aBool);

		void  SeeOtherCharactersInTag();

		void  SeeOtherCharactersNotInTag(TBool& aBool);

		void  DoTagOperationL();

		void  DoEntityOperationL();

		void  WriteToRichTextL();

		void  WriteToTagBufferL(TChar aChar);

		void  WriteToEntityBufferL(TChar aChar);

		void  WriteToAttributeBufferL(TChar aChar);

		void  WriteToAttributeValueBufferL(TChar aChar);

		void  WriteToAttributeArrayL();

	private:

		enum TParserState

		{

		EInitialState,

		ESeeStartOfTag,

		ESeeEndOfTag,

		ESeeClosingTagIndicator,

		ESeeEquals,

		ESeeExclamationMark,

		ESeeEndOfTagWhileReadingJavascript,

		EReadingOpeningTag,

		EReadingClosingTag,

		EReadingAttribute,

		EReadingAttributeValue,

		EReadingAttributeValueWithinInvCommas,

		EReadingText,

		EReadingJavascript,

		EFinishedReadingTag,

		EFinishedReadingAttribute,

		EFinishedReadingAttributeValue,

		EStartOfCharacterEntity,

		EEndOfCharacterEntity,

		EReadingCharacterEntity

		};

	private:

		TPtrC16 iTextBuffer;

		TBuf16<KTagBufferLength> iTagBuffer;

		TBuf16<KEntityBufferLength> iEntityBuffer;

		TBuf16<KAttributeBufferLength> iAttributeBuffer;

		CBufBase* iAttributeValueBuffer;

		RPointerArray<CHtmlToCrtConvAttribute> iAttributes;

		TBuf16<2> iLastTwoCharacters;

		TParserState iParserState;

		TTagState iTagState;

		TBool iInTag;

		TBool iInCharacterEntity;

		TInt iBufferPosition;

		TInt iStartOfTextPosition;

		TInt iEndOfTextPosition;

		TBool iEndOfBufferReached;

		CHtmlToCrtConvBuffer& iBuffer;

		CHtmlToCrtConvHashTable* iHashTable;

		CHtmlToCrtConvActionProcessor* iActionProcessor;

	};

#endif