1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/textandloc/fontservices/textbase/sgdi/BidiTextImp.h	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,125 @@
     1.4 +// Copyright (c) 2002-2010 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +//
    1.18 +
    1.19 +#ifndef BIDITEXTIMP_H_
    1.20 +#define BIDITEXTIMP_H_
    1.21 +
    1.22 +#include "BidiText.h"
    1.23 +
    1.24 +class TRunInfoCompact;
    1.25 +
    1.26 +class TBidiTextImp : public TBidiText
    1.27 +/** This is the implementation for the class TBidiText. It is so designed so 
    1.28 +that it only occupies a single heap cell. This means that it is efficient in 
    1.29 +memory usage, and can be placed on the cleanup stack without being a C-class.
    1.30 +@internalComponent */
    1.31 +	{
    1.32 +public:
    1.33 +	static TBidiTextImp* NewL(TInt aLength, TInt aMaxLines, TInt aBdRunArraySize);
    1.34 +	static TBidiTextImp* Imp(TBidiText* aSelf);
    1.35 +	static const TBidiTextImp* Imp(const TBidiText* aSelf);
    1.36 +	static TInt AlignedSizeOf();
    1.37 +	TText* LogicalText();
    1.38 +	TText* VisualText();
    1.39 +	TInt16* LineWidthArray();
    1.40 +	TRunInfoCompact* BidiRunArray();
    1.41 +	const TText* LogicalText() const
    1.42 +		{ return const_cast<TBidiTextImp*>(this)->LogicalText(); }
    1.43 +	const TText* VisualText() const
    1.44 +		{ return const_cast<TBidiTextImp*>(this)->VisualText(); }
    1.45 +	const TInt16* LineWidthArray() const
    1.46 +		{ return const_cast<TBidiTextImp*>(this)->LineWidthArray(); }
    1.47 +	const TRunInfoCompact* BidiRunArray() const
    1.48 +		{ return const_cast<TBidiTextImp*>(this)->BidiRunArray(); }
    1.49 +	/**
    1.50 +	@return Current truncation character.
    1.51 +	@internalComponent */
    1.52 +	TChar TruncationChar() const
    1.53 +		{ return static_cast<TInt>(iTruncationCharPlane << 16)
    1.54 +		+ iTruncationChar16; }
    1.55 +	
    1.56 +	inline TInt TextLength() const;
    1.57 +	inline void SetTextLength(TInt aLength);
    1.58 +	inline TBool HasRightToLeftDirectionality() const;
    1.59 +	inline void SetRightToLeftDirectionality(TBool aRightToLeftDirectionality);
    1.60 +			
    1.61 +	static TInt RequiredBytes(TInt aLendth, TInt aMaxLines, TInt aBdRunArraySize);
    1.62 +	inline TInt AllocatedTextDataBytes() const;
    1.63 +	
    1.64 +private:
    1.65 +	inline void SetAllocatedTextDataBytes(TInt aMaxBytes);
    1.66 +	enum TFlags
    1.67 +		{
    1.68 +		EFRightToLeft = 0x10000000,
    1.69 +		EFTruncateAtBeginning = 0x20000000
    1.70 +		};
    1.71 +
    1.72 +	enum { ELengthMask = 0x0FFFFFFF };
    1.73 +	TInt iTextLengthAndFlags;
    1.74 +	TInt iTextDataBytes;	// Number of bytes allocated off the end of the object for text data
    1.75 +public:	
    1.76 +	TInt iVisualOrderedTextLength;
    1.77 +	TUint16 iWrappingWidth;
    1.78 +	TUint16 iBidiRunArrayLength;
    1.79 +	TUint8 iLines;
    1.80 +	TUint8 iTruncationCharPlane;
    1.81 +	TUint16 iTruncationChar16;
    1.82 +	};
    1.83 +
    1.84 +TInt SizeLineBreak(const TText* aText);
    1.85 +const TText* FindEndOfThisLine(const TText* aStart, const TText* aEnd);
    1.86 +TInt NumberOfLines(const TText* aStart, const TText* aEnd);
    1.87 +
    1.88 +inline TBidiTextImp* TBidiTextImp::Imp(TBidiText* aSelf)
    1.89 +	{ return static_cast<TBidiTextImp*>(aSelf); }
    1.90 +
    1.91 +inline const TBidiTextImp* TBidiTextImp::Imp(const TBidiText* aSelf)
    1.92 +	{ return static_cast<const TBidiTextImp*>(aSelf); }
    1.93 +
    1.94 +inline TInt TBidiTextImp::AlignedSizeOf()
    1.95 +	{ return ((sizeof(TBidiTextImp) + 1) & 0xFFFFFFFE); }
    1.96 +
    1.97 +inline TInt TBidiTextImp::TextLength() const
    1.98 +	{ return iTextLengthAndFlags & TBidiTextImp::ELengthMask; }
    1.99 +	
   1.100 +inline void TBidiTextImp::SetTextLength(TInt aLength)
   1.101 +	{ iTextLengthAndFlags &= ~ELengthMask;					// clear old size bits
   1.102 +	  iTextLengthAndFlags |= (aLength&ELengthMask); }		// set new size bits
   1.103 +
   1.104 +inline TBool TBidiTextImp::HasRightToLeftDirectionality() const
   1.105 +	{ return iTextLengthAndFlags&TBidiTextImp::EFRightToLeft; }
   1.106 +	
   1.107 +inline void TBidiTextImp::SetRightToLeftDirectionality(TBool aRightToLeftDirectionality)
   1.108 +	{
   1.109 +	if (aRightToLeftDirectionality)
   1.110 +		iTextLengthAndFlags |= TBidiTextImp::EFRightToLeft;
   1.111 +	else
   1.112 +		iTextLengthAndFlags &= ~TBidiTextImp::EFRightToLeft;
   1.113 +	}
   1.114 +				
   1.115 +inline TInt TBidiTextImp::AllocatedTextDataBytes() const
   1.116 +	{ return iTextDataBytes; }
   1.117 +
   1.118 +inline void TBidiTextImp::SetAllocatedTextDataBytes(TInt aTextDataBytes)
   1.119 +	{ iTextDataBytes = aTextDataBytes; }
   1.120 +	
   1.121 +
   1.122 +/**
   1.123 +Bidi panic.
   1.124 +@internalComponent
   1.125 +*/
   1.126 +void TextBasePanic(TInt aError);
   1.127 +
   1.128 +#endif