Symaptic: os/graphics/graphicsdeviceinterface/gdi/sgdi/BidiTextImp.h@bde4ae8d615e

     1 // Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    16 #ifndef BIDITEXTIMP_H_

    17 #define BIDITEXTIMP_H_

    19 #include "BidiText.h"

    21 class TRunInfoCompact;

    23 class TBidiTextImp : public TBidiText

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

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

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

    27 @internalComponent */

    28 	{

    29 public:

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

    31 	static TBidiTextImp* Imp(TBidiText* aSelf);

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

    33 	static TInt AlignedSizeOf();

    34 	TText* LogicalText();

    35 	TText* VisualText();

    36 	TInt16* LineWidthArray();

    37 	TRunInfoCompact* BidiRunArray();

    38 	const TText* LogicalText() const

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

    40 	const TText* VisualText() const

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

    42 	const TInt16* LineWidthArray() const

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

    44 	const TRunInfoCompact* BidiRunArray() const

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

    46 	/**

    47 	@return Current truncation character.

    48 	@internalComponent */

    49 	TChar TruncationChar() const

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

    51 		+ iTruncationChar16; }

    53 	inline TInt TextLength() const;

    54 	inline void SetTextLength(TInt aLength);

    55 	inline TBool HasRightToLeftDirectionality() const;

    56 	inline void SetRightToLeftDirectionality(TBool aRightToLeftDirectionality);

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

    59 	inline TInt AllocatedTextDataBytes() const;

    61 private:

    62 	inline void SetAllocatedTextDataBytes(TInt aMaxBytes);

    63 	enum TFlags

    64 		{

    65 		EFRightToLeft = 0x10000000,

    66 		EFTruncateAtBeginning = 0x20000000

    67 		};

    69 	enum { ELengthMask = 0x0FFFFFFF };

    70 	TInt iTextLengthAndFlags;

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

    72 public:

    73 	TInt iVisualOrderedTextLength;

    74 	TUint16 iWrappingWidth;

    75 	TUint16 iBidiRunArrayLength;

    76 	TUint8 iLines;

    77 	TUint8 iTruncationCharPlane;

    78 	TUint16 iTruncationChar16;

    79 	};

    81 TInt SizeLineBreak(const TText* aText);

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

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

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

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

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

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

    91 inline TInt TBidiTextImp::AlignedSizeOf()

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

    94 inline TInt TBidiTextImp::TextLength() const

    95 	{ return iTextLengthAndFlags & TBidiTextImp::ELengthMask; }

    97 inline void TBidiTextImp::SetTextLength(TInt aLength)

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

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

   101 inline TBool TBidiTextImp::HasRightToLeftDirectionality() const

   102 	{ return iTextLengthAndFlags&TBidiTextImp::EFRightToLeft; }

   104 inline void TBidiTextImp::SetRightToLeftDirectionality(TBool aRightToLeftDirectionality)

   105 	{

   106 	if (aRightToLeftDirectionality)

   107 		iTextLengthAndFlags |= TBidiTextImp::EFRightToLeft;

   108 	else

   109 		iTextLengthAndFlags &= ~TBidiTextImp::EFRightToLeft;

   110 	}

   112 inline TInt TBidiTextImp::AllocatedTextDataBytes() const

   113 	{ return iTextDataBytes; }

   115 inline void TBidiTextImp::SetAllocatedTextDataBytes(TInt aTextDataBytes)

   116 	{ iTextDataBytes = aTextDataBytes; }

   119 /**

   120 Bidi panic.

   121 @internalComponent

   122 */

   123 void Panic(TInt aError);

   125 #endif

author	sl@SLION-WIN7.fritz.box
	Fri, 15 Jun 2012 03:10:57 +0200
changeset 0	bde4ae8d615e
permissions	-rw-r--r--