sl@0: // Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #ifndef BIDITEXTIMP_H_
sl@0: #define BIDITEXTIMP_H_
sl@0: 
sl@0: #include "BidiText.h"
sl@0: 
sl@0: class TRunInfoCompact;
sl@0: 
sl@0: class TBidiTextImp : public TBidiText
sl@0: /** This is the implementation for the class TBidiText. It is so designed so 
sl@0: that it only occupies a single heap cell. This means that it is efficient in 
sl@0: memory usage, and can be placed on the cleanup stack without being a C-class.
sl@0: @internalComponent */
sl@0: 	{
sl@0: public:
sl@0: 	static TBidiTextImp* NewL(TInt aLength, TInt aMaxLines, TInt aBdRunArraySize);
sl@0: 	static TBidiTextImp* Imp(TBidiText* aSelf);
sl@0: 	static const TBidiTextImp* Imp(const TBidiText* aSelf);
sl@0: 	static TInt AlignedSizeOf();
sl@0: 	TText* LogicalText();
sl@0: 	TText* VisualText();
sl@0: 	TInt16* LineWidthArray();
sl@0: 	TRunInfoCompact* BidiRunArray();
sl@0: 	const TText* LogicalText() const
sl@0: 		{ return const_cast<TBidiTextImp*>(this)->LogicalText(); }
sl@0: 	const TText* VisualText() const
sl@0: 		{ return const_cast<TBidiTextImp*>(this)->VisualText(); }
sl@0: 	const TInt16* LineWidthArray() const
sl@0: 		{ return const_cast<TBidiTextImp*>(this)->LineWidthArray(); }
sl@0: 	const TRunInfoCompact* BidiRunArray() const
sl@0: 		{ return const_cast<TBidiTextImp*>(this)->BidiRunArray(); }
sl@0: 	/**
sl@0: 	@return Current truncation character.
sl@0: 	@internalComponent */
sl@0: 	TChar TruncationChar() const
sl@0: 		{ return static_cast<TInt>(iTruncationCharPlane << 16)
sl@0: 		+ iTruncationChar16; }
sl@0: 	
sl@0: 	inline TInt TextLength() const;
sl@0: 	inline void SetTextLength(TInt aLength);
sl@0: 	inline TBool HasRightToLeftDirectionality() const;
sl@0: 	inline void SetRightToLeftDirectionality(TBool aRightToLeftDirectionality);
sl@0: 			
sl@0: 	static TInt RequiredBytes(TInt aLendth, TInt aMaxLines, TInt aBdRunArraySize);
sl@0: 	inline TInt AllocatedTextDataBytes() const;
sl@0: 	
sl@0: private:
sl@0: 	inline void SetAllocatedTextDataBytes(TInt aMaxBytes);
sl@0: 	enum TFlags
sl@0: 		{
sl@0: 		EFRightToLeft = 0x10000000,
sl@0: 		EFTruncateAtBeginning = 0x20000000
sl@0: 		};
sl@0: 
sl@0: 	enum { ELengthMask = 0x0FFFFFFF };
sl@0: 	TInt iTextLengthAndFlags;
sl@0: 	TInt iTextDataBytes;	// Number of bytes allocated off the end of the object for text data
sl@0: public:	
sl@0: 	TInt iVisualOrderedTextLength;
sl@0: 	TUint16 iWrappingWidth;
sl@0: 	TUint16 iBidiRunArrayLength;
sl@0: 	TUint8 iLines;
sl@0: 	TUint8 iTruncationCharPlane;
sl@0: 	TUint16 iTruncationChar16;
sl@0: 	};
sl@0: 
sl@0: TInt SizeLineBreak(const TText* aText);
sl@0: const TText* FindEndOfThisLine(const TText* aStart, const TText* aEnd);
sl@0: TInt NumberOfLines(const TText* aStart, const TText* aEnd);
sl@0: 
sl@0: inline TBidiTextImp* TBidiTextImp::Imp(TBidiText* aSelf)
sl@0: 	{ return static_cast<TBidiTextImp*>(aSelf); }
sl@0: 
sl@0: inline const TBidiTextImp* TBidiTextImp::Imp(const TBidiText* aSelf)
sl@0: 	{ return static_cast<const TBidiTextImp*>(aSelf); }
sl@0: 
sl@0: inline TInt TBidiTextImp::AlignedSizeOf()
sl@0: 	{ return ((sizeof(TBidiTextImp) + 1) & 0xFFFFFFFE); }
sl@0: 
sl@0: inline TInt TBidiTextImp::TextLength() const
sl@0: 	{ return iTextLengthAndFlags & TBidiTextImp::ELengthMask; }
sl@0: 	
sl@0: inline void TBidiTextImp::SetTextLength(TInt aLength)
sl@0: 	{ iTextLengthAndFlags &= ~ELengthMask;					// clear old size bits
sl@0: 	  iTextLengthAndFlags |= (aLength&ELengthMask); }		// set new size bits
sl@0: 
sl@0: inline TBool TBidiTextImp::HasRightToLeftDirectionality() const
sl@0: 	{ return iTextLengthAndFlags&TBidiTextImp::EFRightToLeft; }
sl@0: 	
sl@0: inline void TBidiTextImp::SetRightToLeftDirectionality(TBool aRightToLeftDirectionality)
sl@0: 	{
sl@0: 	if (aRightToLeftDirectionality)
sl@0: 		iTextLengthAndFlags |= TBidiTextImp::EFRightToLeft;
sl@0: 	else
sl@0: 		iTextLengthAndFlags &= ~TBidiTextImp::EFRightToLeft;
sl@0: 	}
sl@0: 				
sl@0: inline TInt TBidiTextImp::AllocatedTextDataBytes() const
sl@0: 	{ return iTextDataBytes; }
sl@0: 
sl@0: inline void TBidiTextImp::SetAllocatedTextDataBytes(TInt aTextDataBytes)
sl@0: 	{ iTextDataBytes = aTextDataBytes; }
sl@0: 	
sl@0: 
sl@0: /**
sl@0: Bidi panic.
sl@0: @internalComponent
sl@0: */
sl@0: void Panic(TInt aError);
sl@0: 
sl@0: #endif