/*

* 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: 

* PRIVATE HEADER FILE CONTAINING IMPLEMENTATION SPECIFIC CLASSES

*

*/

#ifndef __TXTFMSTM_H__

#define __TXTFMSTM_H__

#include <e32std.h>

#include <txtfrmat.h>

// forward declarations

class RReadStream;

class RWriteStream;

class TCharFormatX;

class TCharFormatXMask;

/**

stores format attributes as bytecode

@internalComponent

*/

class RFormatStream

	{

public:

	RFormatStream();

	void CopyL(const RFormatStream& aSource);

	void ExternalizeL(RWriteStream& aStream) const;

	void InternalizeL(RReadStream& aStream);

	void Reset();

	const TUint8* Ptr(TInt& aSize) const;

	void SetParaFormatL(const CParaFormat& aDesiredFormat,const TParaFormatMask& aDesiredMask,const CParaFormat& aCurrentFormat);

	void SenseParaFormatL(CParaFormat& aParaFormat,TParaFormatMask& aMask,CParaFormat::TParaFormatGetMode aMode)const;

	void SetCharFormatL(const TCharFormatX& aCharFormat,const TCharFormatXMask& aMask);

	void SenseCharFormat(TCharFormatX& aCharFormat,TCharFormatXMask& aMask)const;

	void Swap(RFormatStream& aStream);

private:

	void AllocL(TInt aSize);

	TInt Length(TUint8*& aPtr,TTextFormatAttribute aType)const;

	TInt DoCalcSizeParaFormat(const CParaFormat& aDesiredFormat,TParaFormatMask aMask,const CParaFormat& aCurrentFormat);

	void DoSetParaFormat(const CParaFormat& aDesiredFormat,TParaFormatMask aMask,const CParaFormat& aCurrentFormat);

	void RemoveRedundantCharFormat(TCharFormatMask& aMask,const TCharFormatX& aFormat,const TCharFormatX& aEffectiveFormat);

	TInt DoCalcSizeCharFormat(const TCharFormatX& aCharFormat,const TCharFormatXMask& aMask);

	void DoStoreCharFormat(const TCharFormatX& aCharFormat,TCharFormatXMask aMask);

	TUint8* StoreBullet(TUint8* aPtr,const TBullet& aSource);

	TUint8* StoreBorder(TUint8* aPtr,TTextFormatAttribute aType,const TParaBorder& aSource);

	TUint8* StoreTab(TUint8* aPtr,const TTabStop& aSource);

	TInt StoreTabs(TUint8*& aPtr,const CParaFormat& aDesiredFormat,const CParaFormat& aCurrentFormat,TBool aStoreData);

	TInt MergeTabLists(TUint8*& aPtr,const CParaFormat& aDesiredFormat,TInt aDesiredTabCount,

					   const CParaFormat& aCurrentFormat,TInt aCurrentTabCount,TBool aStoreData);

	void StoreAllTabs(TUint8*& aPtr,const CParaFormat& aSource);

	TUint8* Store(TUint8* aPtr,const TLogicalRgb& aRgb);

	TUint8* Store(TUint8* aPtr,const TTypeface& aTypeface);

	TUint8* ReadValue(TUint8* aPtr,TLogicalRgb& aRgb)const;

	TUint8* ReadValue(TUint8* aPtr,TTypeface& aTypeface)const;

	TUint8* ReadValue(TUint8* aPtr,TParaBorder& aBorder)const;

	TUint8* ReadValue(TUint8* aPtr,TBullet& aBullet)const;

	TUint8* ReadTabL(TUint8* aPtr,CParaFormat& aTarget)const;

	TUint8* iBase;	// start of stored bytecode

	TUint8* iEnd;	// end of stored bytecode

	__DECLARE_TEST;

private:

	void TestInvariantL() const;

	TBool DoInvariantCheck() const;

	};

#endif