// Copyright (c) 1997-2009 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:

// Converter Architecture wrappers for CRT -> HTML conversion

// 

//

#ifndef __HTML_2_CRT_CONV_H__

#define __HTML_2_CRT_CONV_H__

const TUid KCrt2HTMLConverterUid = {0x1000071c};

#include <txtmrtsr.h>

//-------------------------------------------------------------------------------------------------

// Fwd Decl.

class TOutputSink;

//-------------------------------------------------------------------------------------------------

// Class CCrtToHTMLConverter.

// The CConverterBase2 derived class which is responsable for performing the conversion operation.

// 1. Only supports File->File conversions

// 2. Does not support embedded objects (ConArc has no mechanism to request a filename to convert the 

//    embedded object into)

// 3. The conversion is performed on a paragraph by paragraph basis

class CCrtToHTMLConverter : public CConverterBase2, MRichTextStoreResolver

{

	public: // from CConverterBase2

		void ConvertL(const TFileName& aSourceFile, const TFileName& aTargetFile,  MConverterUiObserver* aObserver = NULL);

		void ConvertObjectL(RReadStream& aReadStream, RWriteStream& aWriteStream,  MConverterUiObserver* aObserver=NULL);  // Leaves with KErrNotSupported

		void ConvertAL(const TFileName& aSourceFile, const TFileName& aTargetFile, MConverterUiObserver* aObserver=NULL); // Leaves with KErrNotSupported

		void ConvertObjectAL(RReadStream& aReadStream, RWriteStream& aWriteStream, MConverterUiObserver* aObserver=NULL); // Leaves with KErrNotSupported

		TBool DoConvertL();

		TUid  Uid();

		TInt  Capabilities();

		void  CancelConvert();

		CCrtToHTMLConverter();

		~CCrtToHTMLConverter();

		// From MRichTextStoreResolver

		const CStreamStore& StreamStoreL(TInt /*aPos*/)const { return *iStore; };

		static CConverterBase2* NewL();

	private:

		void ResetMembers();

		void RestoreInputTextL(const TFileName& aSourceFile);

		void PrepForConversionL(const TFileName& aSourceFile, const TFileName& aTargetFile);

		void PrepForConversionL(RReadStream& aReadStream, RWriteStream& aWriteStream);

		// Output

		void StartDocumentL();

		void EndDocumentL();

		void TranslateL		(const TDesC& aBuf);

		void WriteTagL(const TDesC8& aTagText);

		void WriteContentL(const TDesC& aText);

		// Processing

		void ProcessParagraphFormatL(const CParaFormat* aParaFormat, TBool aClosePara = ETrue);

		void ProcessParagraphTextL(TInt aPos, TInt aLength);

		void OpenCharFormatL (const TCharFormatMask& aMask, const TCharFormat& aFormat);

		void CloseCharFormatL(const TCharFormatMask& aMask, const TCharFormat& aFormat);

		void DiffCharFormats(const TCharFormat& aFormatA, const TCharFormat& aFormatB, TCharFormatMask& aMask);

	private:

		CParaFormatLayer*  iParaLayer;		// The global paragraph format layer

		CCharFormatLayer*  iCharLayer;		// The global character format layer

		CRichText*		   iInputText; 		// The input rich text

		HBufC*			   iInternalFile;	// Interanl file copy for the input text

		CDirectFileStore*  iStore;			// The Root stream from which we are reading

		RFs				   iFs;				// Our file server session

		RFileWriteStream   iFileStream;

		RWriteStream&	   iHTMLOut;	   	// Somewhere to write our output to

		TBullet* iBullet;					// Pointer to any current bullet object. Null if we're not processing a list.

		TInt     iIndent;					// Indent level (Number of <BLOCKQUOTE> tags to insert)

		TInt     iParaRemain;				// How many paragraphs remain to be processed

		TInt	 iParaCount;				// How many paragraphs are there 

	    TInt	 iParaNum;					// Which paragraph are we processing now (-1 if we haven't started processing yet)

	    TInt	 iParaLen;					// How long is the current paragraph

		TInt	 iParaPos;					// What is the offset of the start of the curent paragraph from the start of the input text

		TBool    iInsertBlankDivClose;		// Flag indicates if the current paragraph was blank

		TInt     iStyleIndex;				// Index into the RichText style list, or -1

		TInt	 iOldFmtCount;				// Checks if this loop has previously been entered

	    MConverterUiObserver* iObserver;		// Our observer object (or NULL if no-one is watching)

	};

enum TTextToHTMLPanic

	{

	EHTMLTagTooSmall,

	EHTMLBeyondLastPara,

	EHTMLNotAPicture

	};

void Panic(TTextToHTMLPanic aPanic);

#endif