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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
00048 virtual bool init( ContextStyle* context ) = 0;
00049
00051 virtual const SymbolTable* symbolTable() const { return &m_symbolTable; }
00052 virtual SymbolTable* symbolTable() { return &m_symbolTable; }
00053
00055 virtual const AlphaTable* alphaTable() const { return 0; };
00056
00057 virtual Artwork* createArtwork(SymbolType type = EmptyBracket) const = 0;
00058
00059 protected:
00060
00061
00062 void fillNameTable( SymbolTable::NameTable& names );
00063
00064 private:
00065
00066 SymbolTable m_symbolTable;
00067 };
00068
00069
00073 class AlphaTableEntry {
00074 public:
00075
00076 AlphaTableEntry() : pos( -1 ) {}
00077
00078 bool valid() const { return pos > -1; }
00079
00080 QFont font;
00081 short pos;
00082 };
00083
00084
00088 class AlphaTable {
00089 public:
00090
00091 virtual ~AlphaTable() {}
00092 virtual AlphaTableEntry entry( short pos, CharFamily family, CharStyle style ) const = 0;
00093 };
00094
00095
00096 const QChar spaceChar = 0x0020;
00097 const QChar leftParenthesisChar = 0x0028;
00098 const QChar rightParenthesisChar = 0x0029;
00099 const QChar leftSquareBracketChar = 0x005B;
00100 const QChar rightSquareBracketChar = 0x005D;
00101 const QChar leftCurlyBracketChar = 0x007B;
00102 const QChar verticalLineChar = 0x007C;
00103 const QChar rightCurlyBracketChar = 0x007D;
00104 const QChar leftAngleBracketChar = 0x2329;
00105 const QChar rightAngleBracketChar = 0x232A;
00106 const QChar slashChar = 0x002F;
00107 const QChar backSlashChar = 0x005C;
00108 const QChar integralChar = 0x222B;
00109 const QChar summationChar = 0x2211;
00110 const QChar productChar = 0x220F;
00111
00112 extern const QChar leftRoundBracket[];
00113 extern const QChar leftSquareBracket[];
00114 extern const QChar leftCurlyBracket[];
00115
00116 extern const QChar leftLineBracket[];
00117 extern const QChar rightLineBracket[];
00118
00119 extern const QChar rightRoundBracket[];
00120 extern const QChar rightSquareBracket[];
00121 extern const QChar rightCurlyBracket[];
00122
00123
00124
00125
00126 class Artwork {
00127 public:
00128
00129 Artwork(SymbolType type = EmptyBracket);
00130 virtual ~Artwork() {}
00131
00132 virtual void calcSizes( const ContextStyle& style,
00133 ContextStyle::TextStyle tstyle,
00134 luPt parentSize ) = 0;
00135 virtual void calcSizes( const ContextStyle& style,
00136 ContextStyle::TextStyle tstyle );
00137
00138 virtual void draw( QPainter& painter, const LuPixelRect& r,
00139 const ContextStyle& style,
00140 ContextStyle::TextStyle tstyle,
00141 luPt parentSize, const LuPixelPoint& origin ) = 0;
00142 virtual void draw( QPainter& painter, const LuPixelRect& r,
00143 const ContextStyle& style,
00144 ContextStyle::TextStyle tstyle,
00145 const LuPixelPoint& parentOrigin );
00146
00147 luPixel getWidth() const { return size.width(); }
00148 luPixel getHeight() const { return size.height(); }
00149
00150 void setWidth( luPixel width ) { size.setWidth(width); }
00151 void setHeight( luPixel height ) { size.setHeight(height); }
00152
00153 luPixel getBaseline() const { return baseline; }
00154 void setBaseline( luPixel line ) { baseline = line; }
00155
00156 luPixel getX() const { return point.x(); }
00157 luPixel getY() const { return point.y(); }
00158
00159 void setX( luPixel x ) { point.setX( x ); }
00160 void setY( luPixel y ) { point.setY( y ); }
00161
00162 SymbolType getType() const { return type; }
00163 void setType(SymbolType t) { type = t; }
00164
00165 virtual bool isNormalChar() const { return getBaseline() != -1; }
00166
00167 virtual double slant() const { return 0; }
00168
00169 protected:
00170
00171 void calcCharSize( const ContextStyle& style, luPt height, QChar ch );
00172 void drawCharacter( QPainter& painter, const ContextStyle& style,
00173 luPixel x, luPixel y, luPt height, QChar ch );
00174
00175 void calcCharSize( const ContextStyle& style, QFont f,
00176 luPt height, uchar c );
00177 void drawCharacter( QPainter& painter, const ContextStyle& style,
00178 QFont f,
00179 luPixel x, luPixel y, luPt height, uchar c );
00180
00181 void calcRoundBracket( const ContextStyle& style, const QChar chars[], luPt height, luPt charHeight );
00182 void calcCurlyBracket( const ContextStyle& style, const QChar chars[], luPt height, luPt charHeight );
00183
00184 void drawBigRoundBracket( QPainter& p, const ContextStyle& style, const QChar chars[], luPixel x, luPixel y, luPt charHeight );
00185 void drawBigCurlyBracket( QPainter& p, const ContextStyle& style, const QChar chars[], luPixel x, luPixel y, luPt charHeight );
00186
00187 private:
00188
00189 LuPixelSize size;
00190 LuPixelPoint point;
00191
00195 luPixel baseline;
00196
00197 SymbolType type;
00198 };
00199
00200
00201 KFORMULA_NAMESPACE_END
00202
00203 #endif