lib

fontstyle.h

00001 /* This file is part of the KDE project
00002    Copyright (C) 2003 Ulrich Kuettler <ulrich.kuettler@gmx.de>
00003 
00004    This library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Library General Public
00006    License as published by the Free Software Foundation; either
00007    version 2 of the License, or (at your option) any later version.
00008 
00009    This library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Library General Public License for more details.
00013 
00014    You should have received a copy of the GNU Library General Public License
00015    along with this library; see the file COPYING.LIB.  If not, write to
00016    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00017  * Boston, MA 02110-1301, USA.
00018 */
00019 
00020 #ifndef FONTSTYLE_H
00021 #define FONTSTYLE_H
00022 
00023 #include <qstring.h>
00024 #include <qfont.h>
00025 
00026 #include "contextstyle.h"
00027 #include "kformuladefs.h"
00028 #include "symboltable.h"
00029 
00030 
00031 KFORMULA_NAMESPACE_BEGIN
00032 
00033 class AlphaTable;
00034 class Artwork;
00035 class ContextStyle;
00036 class SymbolTable;
00037 
00038 
00042 class FontStyle {
00043 public:
00044 
00045     virtual ~FontStyle() {}
00046 
00051     virtual bool init( ContextStyle* context, bool install = true ) = 0;
00052 
00054     virtual const SymbolTable* symbolTable() const { return &m_symbolTable; }
00055     virtual SymbolTable* symbolTable() { return &m_symbolTable; }
00056 
00058     virtual const AlphaTable* alphaTable() const { return 0; };
00059 
00060     virtual Artwork* createArtwork(SymbolType type = EmptyBracket) const = 0;
00061 
00062 protected:
00063 
00064     // This is going to disappear in favour of a real macro facility some day.
00065     void fillNameTable( SymbolTable::NameTable& names );
00066 
00067     static void testFont( QStringList& missing, const QString& fontName );
00068 
00069 private:
00070 
00071     SymbolTable m_symbolTable;
00072 };
00073 
00074 
00078 class AlphaTableEntry {
00079 public:
00080 
00081     AlphaTableEntry() : pos( -1 ) {}
00082 
00083     bool valid() const { return pos > -1; }
00084 
00085     QFont font;
00086     short pos;
00087 };
00088 
00089 
00093 class AlphaTable {
00094 public:
00095 
00096     virtual ~AlphaTable() {}
00097     virtual AlphaTableEntry entry( short pos, CharFamily family, CharStyle style ) const = 0;
00098 };
00099 
00100 
00101 const QChar spaceChar = 0x0020;
00102 const QChar leftParenthesisChar = 0x0028;
00103 const QChar rightParenthesisChar = 0x0029;
00104 const QChar leftSquareBracketChar = 0x005B;
00105 const QChar rightSquareBracketChar = 0x005D;
00106 const QChar leftCurlyBracketChar = 0x007B;
00107 const QChar verticalLineChar = 0x007C;
00108 const QChar rightCurlyBracketChar = 0x007D;
00109 const QChar leftAngleBracketChar = 0x2329;
00110 const QChar rightAngleBracketChar = 0x232A;
00111 const QChar slashChar = 0x002F;
00112 const QChar backSlashChar = 0x005C;
00113 const QChar integralChar = 0x222B;
00114 const QChar summationChar = 0x2211;
00115 const QChar productChar = 0x220F;
00116 
00117 extern const QChar leftRoundBracket[];
00118 extern const QChar leftSquareBracket[];
00119 extern const QChar leftCurlyBracket[];
00120 
00121 extern const QChar leftLineBracket[];
00122 extern const QChar rightLineBracket[];
00123 
00124 extern const QChar rightRoundBracket[];
00125 extern const QChar rightSquareBracket[];
00126 extern const QChar rightCurlyBracket[];
00127 
00128 /*
00129  * A piece of art that may be used by any element.
00130  */
00131 class Artwork {
00132 public:
00133 
00134     Artwork(SymbolType type = EmptyBracket);
00135     virtual ~Artwork() {}
00136 
00137     virtual void calcSizes( const ContextStyle& style,
00138                             ContextStyle::TextStyle tstyle,
00139                             luPt parentSize ) = 0;
00140     virtual void calcSizes( const ContextStyle& style,
00141                             ContextStyle::TextStyle tstyle );
00142 
00143     virtual void draw( QPainter& painter, const LuPixelRect& r,
00144                        const ContextStyle& style,
00145                        ContextStyle::TextStyle tstyle,
00146                        luPt parentSize, const LuPixelPoint& origin ) = 0;
00147     virtual void draw( QPainter& painter, const LuPixelRect& r,
00148                        const ContextStyle& style,
00149                        ContextStyle::TextStyle tstyle,
00150                        const LuPixelPoint& parentOrigin );
00151 
00152     luPixel getWidth() const { return size.width(); }
00153     luPixel getHeight() const { return size.height(); }
00154 
00155     void setWidth( luPixel width ) { size.setWidth(width); }
00156     void setHeight( luPixel height ) { size.setHeight(height); }
00157 
00158     luPixel getBaseline() const { return baseline; }
00159     void setBaseline( luPixel line ) { baseline = line; }
00160 
00161     luPixel getX() const { return point.x(); }
00162     luPixel getY() const { return point.y(); }
00163 
00164     void setX( luPixel x ) { point.setX( x ); }
00165     void setY( luPixel y ) { point.setY( y ); }
00166 
00167     SymbolType getType() const { return type; }
00168     void setType(SymbolType t) { type = t; }
00169 
00170     virtual bool isNormalChar() const { return getBaseline() != -1; }
00171 
00172     virtual double slant() const { return 0; }
00173 
00174 protected:
00175 
00176     void calcCharSize( const ContextStyle& style, luPt height, QChar ch );
00177     void drawCharacter( QPainter& painter, const ContextStyle& style,
00178                         luPixel x, luPixel y, luPt height, QChar ch );
00179 
00180     void calcCharSize( const ContextStyle& style, QFont f,
00181                        luPt height, uchar c );
00182     void drawCharacter( QPainter& painter, const ContextStyle& style,
00183                         QFont f,
00184                         luPixel x, luPixel y, luPt height, uchar c );
00185 
00186     void calcRoundBracket( const ContextStyle& style, const QChar chars[], luPt height, luPt charHeight );
00187     void calcCurlyBracket( const ContextStyle& style, const QChar chars[], luPt height, luPt charHeight );
00188 
00189     void drawBigRoundBracket( QPainter& p, const ContextStyle& style, const QChar chars[], luPixel x, luPixel y, luPt charHeight );
00190     void drawBigCurlyBracket( QPainter& p, const ContextStyle& style, const QChar chars[], luPixel x, luPixel y, luPt charHeight );
00191 
00192 private:
00193 
00194     LuPixelSize size;
00195     LuPixelPoint point;
00196 
00200     luPixel baseline;
00201 
00202     SymbolType type;
00203 };
00204 
00205 
00206 KFORMULA_NAMESPACE_END
00207 
00208 #endif
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