--- a/graphicsdeviceinterface/gdi/sgdi/GlyphSel.h Thu Sep 02 21:50:40 2010 +0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,292 +0,0 @@
-// Copyright (c) 2003-2009 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 __GLYPHSEL_H__
-#define __GLYPHSEL_H__
-
-
-#include <e32std.h>
-#include <gdi.h>
-#include "ShapeInfo.h"
-
-/**
-Forward declarations.
-@internalComponent
-*/
-void Panic(TGdiPanic aError);
-
-class TGlyphSelectionState;
-
-
-/**
- The Unicode char to use for glyph cluster without a base char
-@internalComponent
-*/
-#define KUnicodeDottedCircle 0x25CC
-
-//
-//
-// TUtf32Iterator Class declaration
-//
-//
-
-class TUtf32Iterator
-/*
- Converts UTF16 encoded array of bytes into UTF32 characters,
- ignoring non-characters and unpaired surrogates and
- combining paired surrogates.
-@internalComponent
-*/
- {
-public:
- TUtf32Iterator(const TText16* aStart, const TText16* aEnd, TInt aOffset=0);
-
- inline TBool AtEnd() const;
- inline TBool BeforeStart() const;
- TChar Next();
- TChar Prev();
- void SetPos(TInt aOffset);
- inline TChar Get() const;
- TUint Get(TInt offset);
- TChar GetThenNext();
- TChar GetThenPrev();
- const TText16* CurrentPosition() const;
- void SetCurrentPosition(const TText16*);
-
- TInt LengthToStart() const;
- TInt LengthToEnd() const;
-
-private:
- TUint UTF16ToTChar(const TText16* a);
-
-private:
- /** Start address of the UTF16 array */
- const TText16* iStart;
- /** Address of current position in array */
- const TText16* iCurrent;
- /** Address of the first entry past the end of the array */
- const TText16* iEnd;
-
- /** UTF32 value of the character at the current iterator position */
- TChar iChar;
- };
-
-
-//
-//
-// GlyphSelUtils Namespace declaration
-//
-//
-
-
-namespace GlyphSelUtils
-/**
- This namespace holds a collection of useful common utility
- functions used in glyph selection. These functions are intended to be
- used by the glyph selector classes.
-@internalComponent
-*/
- {
- inline TBool IsSurrogate(TText a)
- {
- return 0xD800 == (a & 0xF800);
- }
-
- inline TBool IsHighSurrogate(TText a)
- {
- return 0xD800 == (a & 0xFC00);
- }
-
- inline TBool IsLowSurrogate(TText a)
- {
- return 0xDC00 == (a & 0xFC00);
- }
-
- inline TChar PairSurrogates(TText aHigh, TText aLow)
- {
- return ((aHigh - 0xd7f7) << 10) + aLow;
- }
-
- inline TBool IsThaiCharacter(TUint code)
- {
- return ((code > 0x0E00 && code < 0x0E3B) ||
- (code > 0x0E3E && code < 0x0E5C));
- }
-
- }
-
-
-//
-//
-// TGlyphSelectionState Class declaration
-//
-//
-
-
-class TGlyphSelectionState
-/**
- This container class holds the data for glyph selection algorithm and is
- used to pass this data around the algorithm methods.
-@internalComponent
-*/
- {
-public:
- enum TPenAdvance
- /**
- Enum used in glyph selection code indicating if a pen advance is needed following
- the processing of the current glyph.
- */
- {
- EPenAdvance_No,
- EPenAdvance_Yes,
- };
-
- enum TGlyphClusterStateOverride
- /**
- These enumeration values are used by the glyph selector classes to indicated
- back to the glyph selection algorithm when they find a cluster complete.
- */
- {
- EGClusterComplete,
- EGClusterNotComplete
- };
-
- enum TGlyphPostCombine
- /**
- These enumeration values are used by the glyph selector classes to decide whether
- post combining is needed to combine the diacritic to the base character.
- */
- {
- EGPostCombine_No,
- EGPostCombine_Yes
- };
-
-
- TGlyphSelectionState(TUtf32Iterator& aIter, const CFont* aFont, CFont::TPositionParam& aParam)
- : iCodePt(0xFFFF), iCodeChar(0xFFFF), iCombCls(-1), iCats(0),
- iText(aIter), iFont(aFont), iParam(aParam),
- iClusterState(EGClusterNotComplete), iPen(EPenAdvance_No),
- iAdvance(), iLigaturePortionsRemaining(0), iGlyphPostCombine(EGPostCombine_No) { };
-
- TBool IsCombiningClass() { return (iCats & 0xF0) == TChar::EMarkGroup; }
- void CombineLastGlyphToBase(const TRect& aBase, TInt aFirstDiacritic);
-
- TBool AppendGlyphToCluster(TUint code);
-
-public:
- /** The properties of the current character being processed */
- TUint iCodePt;
- TChar iCodeChar;
- TInt iCombCls;
- TUint iCats;
-
- /** The Unicode iterator to the text processed */
- TUtf32Iterator& iText;
-
- /** The font to select glyphs from */
- const CFont* iFont;
-
- /** The in/out parameter data to the glyph selection code from outside */
- CFont::TPositionParam& iParam;
-
- /** Result from the glyph selector class as to whether it thinks the
- cluster is complete or incomplete.
- */
- TGlyphClusterStateOverride iClusterState;
-
- /** These hold the possible pen advance and if it should be applied */
- TPenAdvance iPen;
- TSize iAdvance;
-
- /** Can be used in any way or not at all by the processing function. It is
- set to 0 on intitialisation. Suggested use is to pass information about
- which part of a ligature is currently having diacritics attatched to it. */
- TInt iLigaturePortionsRemaining;
- /** Can be used in any way or not at all by the processing function. It is
- not initialised. Suggested use is to record the position in the output
- glyph array of the first diacritic on this portion of the ligature. */
- TInt iLigaturePortionFirstMark;
-
- /**
- Result from the glyph selector class as to whether it needs to
- combine the diacritic with the base character.
- */
- TGlyphPostCombine iGlyphPostCombine;
- };
-
-
-//
-//
-// GlyphSelector_SoftHyphen Class declaration
-//
-//
-
-class GlyphSelector_SoftHyphen
-/**
- This glyph selector class processes the Unicode soft hyphen U+00AD
- character.
- This is a discretionary hyphen, i.e. it is only rendered when required
- and in Symbian OS that is when it is found at the end of a line.
-@internalComponent
-*/
- {
-public:
-
- static TBool Process(TGlyphSelectionState& aGss, RShapeInfo&);
- };
-
-
-//
-//
-// GlyphSelector_Default Class declaration
-//
-//
-
-class GlyphSelector_Default
-/**
- This is the default glyph selector class which has the behaviour of outputting
- all glyphs it is invoked to process.
-@internalComponent
-*/
- {
-public:
-
- static TBool Process(TGlyphSelectionState& aGss, RShapeInfo&);
- };
-
-
-//
-// TUtf32Iterator inline Function definitions.
-//
-
-
-inline TBool TUtf32Iterator::AtEnd() const
- {
- return iEnd == iCurrent;
- }
-
-inline TBool TUtf32Iterator::BeforeStart() const
- {
- return iStart > iCurrent;
- }
-
-inline TChar TUtf32Iterator::Get() const
- {
- __ASSERT_DEBUG(iCurrent >= iStart && iCurrent < iEnd, Panic(EGdiPanic_OutOfText));
-
- return iChar;
- }
-
-#endif // __GLYPHSEL_H__