fontstyle.h

/* This file is part of the KDE project
   Copyright (C) 2003 Ulrich Kuettler <ulrich.kuettler@gmx.de>
   Copyright (C) 2006 Alfredo Beaumont Sainz <alfredo.beaumont@gmail.com>
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
 
#ifndef FONTSTYLE_H
#define FONTSTYLE_H
 
#include <tqstring.h>
#include <tqfont.h>
 
#include "contextstyle.h"
#include "kformuladefs.h"
#include "symboltable.h"
 
 
KFORMULA_NAMESPACE_BEGIN
 
class Artwork;
class SymbolTable;
 
 
class FontStyle {
public:
    ~FontStyle() {}
 
    bool init( ContextStyle* context, bool install = true );
 
    const SymbolTable* symbolTable() const { return &m_symbolTable; }
    SymbolTable* symbolTable() { return &m_symbolTable; }
 
    Artwork* createArtwork(SymbolType type = EmptyBracket) const;
 
    static TQStringList missingFonts( bool install = true );
 
    static bool m_installed;
 
    static void testFont( TQStringList& missing, const TQString& fontName );
 
private:
 
    static TQStringList missingFontsInternal();
    static void installFonts();
 
    SymbolTable m_symbolTable;
 
};
 
const TQChar spaceChar = 0x0020;
const TQChar leftParenthesisChar = 0x0028;
const TQChar rightParenthesisChar = 0x0029;
const TQChar leftSquareBracketChar = 0x005B;
const TQChar rightSquareBracketChar = 0x005D;
const TQChar leftCurlyBracketChar = 0x007B;
const TQChar verticalLineChar = 0x007C;
const TQChar rightCurlyBracketChar = 0x007D;
const TQChar leftAngleBracketChar = 0x2329;
const TQChar rightAngleBracketChar = 0x232A;
const TQChar slashChar = 0x002F;
const TQChar backSlashChar = 0x005C;
const TQChar integralChar = 0x222B;
const TQChar summationChar = 0x2211;
const TQChar productChar = 0x220F;
const TQChar applyFunctionChar = 0x2061;
const TQChar invisibleTimes = 0x2062;
const TQChar invisibleComma = 0x2063;
 
extern const TQChar leftRoundBracket[];
extern const TQChar leftSquareBracket[];
extern const TQChar leftCurlyBracket[];
 
extern const TQChar leftLineBracket[];
extern const TQChar rightLineBracket[];
 
extern const TQChar rightRoundBracket[];
extern const TQChar rightSquareBracket[];
extern const TQChar rightCurlyBracket[];
 
/*
 * A piece of art that may be used by any element.
 */
class Artwork {
public:
 
    Artwork(SymbolType type = EmptyBracket);
    virtual ~Artwork() {}
 
    virtual void calcSizes( const ContextStyle& style,
                            ContextStyle::TextStyle tstyle,
                            double factor,
                            luPt parentSize );
    virtual void calcSizes( const ContextStyle& style,
                            ContextStyle::TextStyle tstyle,
                            double factor );
 
    virtual void draw( TQPainter& painter, const LuPixelRect& r,
                       const ContextStyle& context,
                       ContextStyle::TextStyle tstyle,
                       StyleAttributes& style,
                       luPt parentSize, const LuPixelPoint& origin );
    virtual void draw( TQPainter& painter, const LuPixelRect& r,
                       const ContextStyle& context,
                       ContextStyle::TextStyle tstyle,
                       StyleAttributes& style,
                       const LuPixelPoint& parentOrigin );
 
    luPixel getWidth() const { return size.width(); }
    luPixel getHeight() const { return size.height(); }
 
    void setWidth( luPixel width ) { size.setWidth(width); }
    void setHeight( luPixel height ) { size.setHeight(height); }
 
    luPixel getBaseline() const { return baseline; }
    void setBaseline( luPixel line ) { baseline = line; }
 
    luPixel getX() const { return point.x(); }
    luPixel getY() const { return point.y(); }
 
    void setX( luPixel x ) { point.setX( x ); }
    void setY( luPixel y ) { point.setY( y ); }
 
    SymbolType getType() const { return type; }
    void setType(SymbolType t) { type = t; }
 
    virtual bool isNormalChar() const { return getBaseline() != -1 && ( cmChar == -1 ); }
 
    virtual double slant() const { return 0; }
 
protected:
 
    void calcCharSize( const ContextStyle& style, luPt height, TQChar ch );
    void drawCharacter( TQPainter& painter, const ContextStyle& style,
                        luPixel x, luPixel y, luPt height, TQChar ch );
 
    void calcCharSize( const ContextStyle& style, TQFont f, luPt height, TQChar c );
    void drawCharacter( TQPainter& painter, const ContextStyle& style,
                        TQFont f,
                        luPixel x, luPixel y, luPt height, uchar c );
 
    void calcRoundBracket( const ContextStyle& style, const TQChar chars[], luPt height, luPt charHeight );
    void calcCurlyBracket( const ContextStyle& style, const TQChar chars[], luPt height, luPt charHeight );
 
    void drawBigRoundBracket( TQPainter& p, const ContextStyle& style, const TQChar chars[], luPixel x, luPixel y, luPt charHeight );
    void drawBigCurlyBracket( TQPainter& p, const ContextStyle& style, const TQChar chars[], luPixel x, luPixel y, luPt charHeight );
 
private:
 
    LuPixelSize size;
    LuPixelPoint point;
 
    luPixel baseline;
 
    SymbolType type;
 
    bool calcCMDelimiterSize( const ContextStyle& context, uchar c,
                              luPt fontSize, luPt parentSize );
    void calcLargest( const ContextStyle& context, uchar c, luPt fontSize );
    void drawCMDelimiter( TQPainter& painter, const ContextStyle& style,
                          luPixel x, luPixel y, luPt height );
 
    short cmChar;
};
 
 
KFORMULA_NAMESPACE_END
 
#endif