// Copyright (c) 2002-2009 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 BIDITEXTIMP_H_

#define BIDITEXTIMP_H_

#include "BidiText.h"

class TRunInfoCompact;

class TBidiTextImp : public TBidiText

/** This is the implementation for the class TBidiText. It is so designed so 

that it only occupies a single heap cell. This means that it is efficient in 

memory usage, and can be placed on the cleanup stack without being a C-class.

@internalComponent */

	{

public:

	static TBidiTextImp* NewL(TInt aLength, TInt aMaxLines, TInt aBdRunArraySize);

	static TBidiTextImp* Imp(TBidiText* aSelf);

	static const TBidiTextImp* Imp(const TBidiText* aSelf);

	static TInt AlignedSizeOf();

	TText* LogicalText();

	TText* VisualText();

	TInt16* LineWidthArray();

	TRunInfoCompact* BidiRunArray();

	const TText* LogicalText() const

		{ return const_cast<TBidiTextImp*>(this)->LogicalText(); }

	const TText* VisualText() const

		{ return const_cast<TBidiTextImp*>(this)->VisualText(); }

	const TInt16* LineWidthArray() const

		{ return const_cast<TBidiTextImp*>(this)->LineWidthArray(); }

	const TRunInfoCompact* BidiRunArray() const

		{ return const_cast<TBidiTextImp*>(this)->BidiRunArray(); }

	/**

	@return Current truncation character.

	@internalComponent */

	TChar TruncationChar() const

		{ return static_cast<TInt>(iTruncationCharPlane << 16)

		+ iTruncationChar16; }

	inline TInt TextLength() const;

	inline void SetTextLength(TInt aLength);

	inline TBool HasRightToLeftDirectionality() const;

	inline void SetRightToLeftDirectionality(TBool aRightToLeftDirectionality);

	static TInt RequiredBytes(TInt aLendth, TInt aMaxLines, TInt aBdRunArraySize);

	inline TInt AllocatedTextDataBytes() const;

private:

	inline void SetAllocatedTextDataBytes(TInt aMaxBytes);

	enum TFlags

		{

		EFRightToLeft = 0x10000000,

		EFTruncateAtBeginning = 0x20000000

		};

	enum { ELengthMask = 0x0FFFFFFF };

	TInt iTextLengthAndFlags;

	TInt iTextDataBytes;	// Number of bytes allocated off the end of the object for text data

public:	

	TInt iVisualOrderedTextLength;

	TUint16 iWrappingWidth;

	TUint16 iBidiRunArrayLength;

	TUint8 iLines;

	TUint8 iTruncationCharPlane;

	TUint16 iTruncationChar16;

	};

TInt SizeLineBreak(const TText* aText);

const TText* FindEndOfThisLine(const TText* aStart, const TText* aEnd);

TInt NumberOfLines(const TText* aStart, const TText* aEnd);

inline TBidiTextImp* TBidiTextImp::Imp(TBidiText* aSelf)

	{ return static_cast<TBidiTextImp*>(aSelf); }

inline const TBidiTextImp* TBidiTextImp::Imp(const TBidiText* aSelf)

	{ return static_cast<const TBidiTextImp*>(aSelf); }

inline TInt TBidiTextImp::AlignedSizeOf()

	{ return ((sizeof(TBidiTextImp) + 1) & 0xFFFFFFFE); }

inline TInt TBidiTextImp::TextLength() const

	{ return iTextLengthAndFlags & TBidiTextImp::ELengthMask; }

inline void TBidiTextImp::SetTextLength(TInt aLength)

	{ iTextLengthAndFlags &= ~ELengthMask;					// clear old size bits

	  iTextLengthAndFlags |= (aLength&ELengthMask); }		// set new size bits

inline TBool TBidiTextImp::HasRightToLeftDirectionality() const

	{ return iTextLengthAndFlags&TBidiTextImp::EFRightToLeft; }

inline void TBidiTextImp::SetRightToLeftDirectionality(TBool aRightToLeftDirectionality)

	{

	if (aRightToLeftDirectionality)

		iTextLengthAndFlags |= TBidiTextImp::EFRightToLeft;

	else

		iTextLengthAndFlags &= ~TBidiTextImp::EFRightToLeft;

	}

inline TInt TBidiTextImp::AllocatedTextDataBytes() const

	{ return iTextDataBytes; }

inline void TBidiTextImp::SetAllocatedTextDataBytes(TInt aTextDataBytes)

	{ iTextDataBytes = aTextDataBytes; }

/**

Bidi panic.

@internalComponent

*/

void Panic(TInt aError);

#endif