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Diffstat (limited to 'src/kernel/qtextengine_p.h')
| -rw-r--r-- | src/kernel/qtextengine_p.h | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/src/kernel/qtextengine_p.h b/src/kernel/qtextengine_p.h new file mode 100644 index 000000000..a94c9a8e6 --- /dev/null +++ b/src/kernel/qtextengine_p.h @@ -0,0 +1,377 @@ +/**************************************************************************** +** +** ??? +** +** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the kernel module of the TQt GUI Toolkit. +** +** This file may be used under the terms of the GNU General +** Public License versions 2.0 or 3.0 as published by the Free +** Software Foundation and appearing in the files LICENSE.GPL2 +** and LICENSE.GPL3 included in the packaging of this file. +** Alternatively you may (at your option) use any later version +** of the GNU General Public License if such license has been +** publicly approved by Trolltech ASA (or its successors, if any) +** and the KDE Free TQt Foundation. +** +** Please review the following information to ensure GNU General +** Public Licensing retquirements will be met: +** http://trolltech.com/products/qt/licenses/licensing/opensource/. +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://trolltech.com/products/qt/licenses/licensing/licensingoverview +** or contact the sales department at [email protected]. +** +** Licensees holding valid TQt Commercial licenses may use this file in +** accordance with the TQt Commercial License Agreement provided with +** the Software. +** +** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, +** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted +** herein. +** +**********************************************************************/ + +#ifndef TQTEXTENGINE_P_H +#define TQTEXTENGINE_P_H + +#ifndef QT_H +#include "qglobal.h" +#include "qstring.h" +#include "qnamespace.h" +#include <private/qfontdata_p.h> +#endif // QT_H + +#include <stdlib.h> +#ifndef Q_OS_TEMP +#include <assert.h> +#endif // Q_OS_TEMP + +class TQFontPrivate; +class TQString; + +class TQOpenType; +class TQPainter; + +// this uses the same coordinate system as TQt, but a different one to freetype and Xft. +// * y is usually negative, and is equal to the ascent. +// * negative yoff means the following stuff is drawn higher up. +// the characters bounding rect is given by TQRect( x,y,width,height), it's advance by +// xoo and yoff +struct glyph_metrics_t +{ + inline glyph_metrics_t() { + x = 100000; + y = 100000; + width = 0; + height = 0; + xoff = 0; + yoff = 0; + } + inline glyph_metrics_t( int _x, int _y, int _width, int _height, int _xoff, int _yoff ) { + x = _x; + y = _y; + width = _width; + height = _height; + xoff = _xoff; + yoff = _yoff; + } + int x; + int y; + int width; + int height; + int xoff; + int yoff; +}; + +#if defined( Q_WS_X11 ) || defined ( Q_WS_QWS ) +typedef unsigned short glyph_t; + +struct qoffset_t { + short x; + short y; +}; + +typedef int advance_t; + +struct TQScriptAnalysis +{ + unsigned short script : 7; + unsigned short bidiLevel : 6; // Unicode Bidi algorithm embedding level (0-61) + unsigned short override : 1; // Set when in LRO/RLO embedding + unsigned short reserved : 2; + bool operator == ( const TQScriptAnalysis &other ) { + return + script == other.script && + bidiLevel == other.bidiLevel; + // ### +// && override == other.override; + } + +}; + +#elif defined( Q_WS_MAC ) + +typedef unsigned short glyph_t; + +struct qoffset_t { + short x; + short y; +}; + +typedef int advance_t; + +struct TQScriptAnalysis +{ + unsigned short script : 7; + unsigned short bidiLevel : 6; // Unicode Bidi algorithm embedding level (0-61) + unsigned short override : 1; // Set when in LRO/RLO embedding + unsigned short reserved : 2; + bool operator == ( const TQScriptAnalysis &other ) { + return + script == other.script && + bidiLevel == other.bidiLevel; + // ### +// && override == other.override; + } + +}; + +#elif defined( Q_WS_WIN ) + +// do not change the definitions below unless you know what you are doing! +// it is designed to be compatible with the types found in uniscribe. + +typedef unsigned short glyph_t; + +struct qoffset_t { + int x; + int y; +}; + +typedef int advance_t; + +struct TQScriptAnalysis { + unsigned short script :10; + unsigned short rtl :1; + unsigned short layoutRTL :1; + unsigned short linkBefore :1; + unsigned short linkAfter :1; + unsigned short logicalOrder :1; + unsigned short noGlyphIndex :1; + unsigned short bidiLevel :5; + unsigned short override :1; + unsigned short inhibitSymSwap :1; + unsigned short charShape :1; + unsigned short digitSubstitute :1; + unsigned short inhibitLigate :1; + unsigned short fDisplayZWG :1; + unsigned short arabicNumContext :1; + unsigned short gcpClusters :1; + unsigned short reserved :1; + unsigned short engineReserved :2; +}; + +inline bool operator == ( const TQScriptAnalysis &sa1, const TQScriptAnalysis &sa2 ) +{ + return + sa1.script == sa2.script && + sa1.bidiLevel == sa2.bidiLevel; + // ### +// && override == other.override; +} + +#endif + +// enum and struct are made to be compatible with Uniscribe, dont change unless you know what you're doing. +struct GlyphAttributes { + // highest value means highest priority for justification. Justification is done by first inserting kashidas + // starting with the highest priority positions, then stretching spaces, afterwards extending inter char + // spacing, and last spacing between arabic words. + // NoJustification is for example set for arabic where no Kashida can be inserted or for diacritics. + enum Justification { + NoJustification= 0, // Justification can't be applied after this glyph + Arabic_Space = 1, // This glyph represents a space inside arabic text + Character = 2, // Inter-character justification point follows this glyph + Space = 4, // This glyph represents a blank outside an Arabic run + Arabic_Normal = 7, // Normal Middle-Of-Word glyph that connects to the right (begin) + Arabic_Waw = 8, // Next character is final form of Waw/Ain/Qaf/Fa + Arabic_BaRa = 9, // Next two chars are Ba + Ra/Ya/AlefMaksura + Arabic_Alef = 10, // Next character is final form of Alef/Tah/Lam/Kaf/Gaf + Arabic_HaaDal = 11, // Next character is final form of Haa/Dal/Taa Marbutah + Arabic_Seen = 12, // Initial or Medial form Of Seen/Sad + Arabic_Kashida = 13 // Kashida(U+640) in middle of word + }; + unsigned short justification :4; // Justification class + unsigned short clusterStart :1; // First glyph of representation of cluster + unsigned short mark :1; // needs to be positioned around base char + unsigned short zeroWidth :1; // ZWJ, ZWNJ etc, with no width, currently used as "Don't print" for ZWSP + unsigned short reserved :1; + unsigned short combiningClass :8; +}; + +// also this is compatible to uniscribe. Do not change. +struct TQCharAttributes { + uchar softBreak :1; // Potential linebreak point _before_ this character + uchar whiteSpace :1; // A unicode whitespace character, except NBSP, ZWNBSP + uchar charStop :1; // Valid cursor position (for left/right arrow) + uchar wordStop :1; // Valid cursor position (for ctrl + left/right arrow) + uchar invalid :1; + uchar reserved :3; +}; + +inline bool qIsZeroWidthChar(ushort uc) +{ + return (uc >= 0x200b && uc <= 0x200f /* ZW Space, ZWNJ, ZWJ, LRM and RLM */) + || (uc >= 0x2028 && uc <= 0x202f /* LS, PS, LRE, RLE, PDF, LRO, RLO, NNBSP */) + || (uc >= 0x206a && uc <= 0x206f /* ISS, ASS, IAFS, AFS, NADS, NODS */); +} + +class TQFontEngine; + +struct TQScriptItem +{ + inline TQScriptItem() : position( 0 ), isSpace( FALSE ), isTab( FALSE ), + isObject( FALSE ), hasPositioning( FALSE ), + descent( -1 ), ascent( -1 ), width( -1 ), + x( 0 ), y( 0 ), num_glyphs( 0 ), glyph_data_offset( 0 ), + fontEngine( 0 ) { } + int position; + TQScriptAnalysis analysis; + unsigned short isSpace : 1; + unsigned short isTab : 1; + unsigned short isObject : 1; + unsigned short hasPositioning : 1; + unsigned short complex : 1; // Windows only + unsigned short private_use : 1; // Windows only + unsigned short reserved : 10; + short descent; + int ascent; + int width; + int x; + int y; + int num_glyphs; + int glyph_data_offset; + TQFontEngine *fontEngine; +}; + +struct TQScriptItemArrayPrivate +{ + unsigned int alloc; + unsigned int size; + TQScriptItem items[1]; +}; + +class TQScriptItemArray +{ +public: + TQScriptItemArray() : d( 0 ) {} + ~TQScriptItemArray(); + + inline TQScriptItem &operator[] (int i) const {return d->items[i]; } + inline void append( const TQScriptItem &item ) { + if ( d->size == d->alloc ) + resize( d->size + 1 ); + d->items[d->size] = item; + d->size++; + } + inline int size() const { return d ? d->size : 0; } + + void resize( int s ); + void clear(); + + TQScriptItemArrayPrivate *d; +private: +#ifdef Q_DISABLE_COPY + TQScriptItemArray( const TQScriptItemArray & ); + TQScriptItemArray &operator = ( const TQScriptItemArray & ); +#endif +}; + +class TQFontPrivate; + +class TQTextEngine { +public: + TQTextEngine( const TQString &str, TQFontPrivate *f ); + ~TQTextEngine(); + + enum Mode { + Full = 0x00, + NoBidi = 0x01, + SingleLine = 0x02, + WidthOnly = 0x07 + }; + + void itemize( int mode = Full ); + + static void bidiReorder( int numRuns, const Q_UINT8 *levels, int *visualOrder ); + + const TQCharAttributes *attributes(); + void shape( int item ) const; + + // ### we need something for justification + + enum Edge { + Leading, + Trailing + }; + enum ShaperFlag { + RightToLeft = 0x0001, + Mirrored = 0x0001 + }; + + int width( int charFrom, int numChars ) const; + glyph_metrics_t boundingBox( int from, int len ) const; + + TQScriptItemArray items; + TQString string; + TQFontPrivate *fnt; + int lineWidth; + int widthUsed; + int firstItemInLine; + int currentItem; + TQChar::Direction direction : 5; + unsigned int haveCharAttributes : 1; + unsigned int widthOnly : 1; + unsigned int reserved : 25; + + int length( int item ) const { + const TQScriptItem &si = items[item]; + int from = si.position; + item++; + return ( item < items.size() ? items[item].position : string.length() ) - from; + } + void splitItem( int item, int pos ); + + unsigned short *logClustersPtr; + glyph_t *glyphPtr; + advance_t *advancePtr; + qoffset_t *offsetsPtr; + GlyphAttributes *glyphAttributesPtr; + + inline unsigned short *logClusters( const TQScriptItem *si ) const + { return logClustersPtr+si->position; } + inline glyph_t *glyphs( const TQScriptItem *si ) const + { return glyphPtr+si->glyph_data_offset; } + inline advance_t *advances( const TQScriptItem *si ) const + { return advancePtr+si->glyph_data_offset; } + inline qoffset_t *offsets( const TQScriptItem *si ) const + { return offsetsPtr+si->glyph_data_offset; } + inline GlyphAttributes *glyphAttributes( const TQScriptItem *si ) const + { return glyphAttributesPtr+si->glyph_data_offset; } + + void reallocate( int totalGlyphs ); + inline void ensureSpace( int nGlyphs ) const { + if ( num_glyphs - used < nGlyphs ) + ((TQTextEngine *)this)->reallocate( ( (used + nGlyphs + 16) >> 4 ) << 4 ); + } + + int allocated; + void **memory; + int num_glyphs; + int used; +}; + +#endif |