bracketelement.h

/* This file is part of the KDE project
   Copyright (C) 2001 Andrea Rizzi <rizzi@kde.org>
                  Ulrich Kuettler <ulrich.kuettler@mailbox.tu-dresden.de>
 
   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 BRACKETELEMENT_H
#define BRACKETELEMENT_H
 
#include <tqpoint.h>
#include <tqsize.h>
 
#include "basicelement.h"
 
KFORMULA_NAMESPACE_BEGIN
 
class Artwork;
class SequenceElement;
 

class SingleContentElement : public BasicElement {
    SingleContentElement& operator=( const SingleContentElement& ) { return *this; }
public:
 
    SingleContentElement(BasicElement* parent = 0);
    ~SingleContentElement();
 
    SingleContentElement( const SingleContentElement& );

    virtual TQChar getCharacter() const;

    virtual BasicElement* goToPos( FormulaCursor*, bool& handled,
                                   const LuPixelPoint& point, const LuPixelPoint& parentOrigin );

    virtual void dispatchFontCommand( FontCommand* cmd );

    virtual void moveLeft(FormulaCursor* cursor, BasicElement* from);

    virtual void moveRight(FormulaCursor* cursor, BasicElement* from);

    virtual void moveUp(FormulaCursor* cursor, BasicElement* from);

    virtual void moveDown(FormulaCursor* cursor, BasicElement* from);

    virtual void remove(FormulaCursor*, TQPtrList<BasicElement>&, Direction);

    virtual void normalize(FormulaCursor*, Direction);
 
    // main child
    //
    // If an element has children one has to become the main one.
 
    virtual SequenceElement* getMainChild();

    virtual void selectChild(FormulaCursor* cursor, BasicElement* child);
 
protected:

    virtual void writeDom(TQDomElement element);
 
    virtual void writeMathMLContent( TQDomDocument& doc, 
                                     TQDomElement& element,
                                     bool oasisFormat ) const;
    virtual bool readContentFromDom(TQDomNode& node);

    virtual int readContentFromMathMLDom(TQDomNode& node);
 
    SequenceElement* getContent() { return content; }
 
private:

    SequenceElement* content;
};
 

class BracketElement : public SingleContentElement {
    typedef SingleContentElement inherited;
    BracketElement& operator=( const BracketElement& ) { return *this; }
public:
 
    enum { contentPos };
 
    BracketElement(SymbolType left = EmptyBracket, SymbolType right = EmptyBracket,
                   BasicElement* parent = 0);
    ~BracketElement();
 
    BracketElement( const BracketElement& );
 
    virtual BracketElement* clone() {
        return new BracketElement( *this );
    }
 
    virtual bool accept( ElementVisitor* visitor );

    virtual TokenType getTokenType() const { return BRACKET; }

    virtual void entered( SequenceElement* child );

    virtual BasicElement* goToPos( FormulaCursor*, bool& handled,
                                   const LuPixelPoint& point, const LuPixelPoint& parentOrigin );

    virtual void calcSizes( const ContextStyle& context,
                            ContextStyle::TextStyle tstyle,
                            ContextStyle::IndexStyle istyle,
                            StyleAttributes& style );

    virtual void draw( TQPainter& painter, const LuPixelRect& r,
                       const ContextStyle& context,
                       ContextStyle::TextStyle tstyle,
                       ContextStyle::IndexStyle istyle,
                       StyleAttributes& style,
                       const LuPixelPoint& parentOrigin );
 
protected:
 
    //Save/load support

    virtual TQString getTagName() const { return "BRACKET"; }

    virtual bool readAttributesFromDom(TQDomElement element);
 
    virtual void writeDom(TQDomElement element);
 
    virtual TQString getElementName() const { return "mfenced"; }
    virtual void writeMathMLAttributes( TQDomElement& element ) const;
    virtual bool readAttributesFromMathMLDom(const TQDomElement& element);

    virtual int readContentFromMathMLDom(TQDomNode& node);

    virtual TQString toLatex();
 
    virtual TQString formulaString();
 
private:

    TQString latexString(char);
    
    int operatorType( TQDomNode& node, bool open );

    int searchOperator( const TQDomNode& node );

    Artwork* left;
    Artwork* right;
 
    SymbolType leftType;
    SymbolType rightType;
 
    TQString m_separators;
    bool m_operator;
    bool m_customLeft;
    bool m_customRight;
};
 

class OverlineElement : public SingleContentElement {
    OverlineElement& operator=( const OverlineElement& ) { return *this; }
public:
 
    OverlineElement(BasicElement* parent = 0);
    ~OverlineElement();
 
    OverlineElement( const OverlineElement& );
 
    virtual OverlineElement* clone() {
        return new OverlineElement( *this );
    }
 
    virtual bool accept( ElementVisitor* visitor );

    virtual void entered( SequenceElement* child );

    virtual void calcSizes( const ContextStyle& context,
                            ContextStyle::TextStyle tstyle,
                            ContextStyle::IndexStyle istyle,
                            StyleAttributes& style );

    virtual void draw( TQPainter& painter, const LuPixelRect& r,
                       const ContextStyle& context,
                       ContextStyle::TextStyle tstyle,
                       ContextStyle::IndexStyle istyle,
                       StyleAttributes& style,
                       const LuPixelPoint& parentOrigin );

    virtual TQString toLatex();
 
    virtual TQString formulaString();
 
    virtual void writeMathML( TQDomDocument& doc, TQDomNode& parent, bool oasisFormat = false ) const;
 
protected:
 
    //Save/load support

    virtual TQString getTagName() const { return "OVERLINE"; }
 
private:
};
 

class UnderlineElement : public SingleContentElement {
    UnderlineElement& operator=( const UnderlineElement& ) { return *this; }
public:
    UnderlineElement(BasicElement* parent = 0);
    ~UnderlineElement();
 
    UnderlineElement( const UnderlineElement& );
 
    virtual UnderlineElement* clone() {
        return new UnderlineElement( *this );
    }
 
    virtual bool accept( ElementVisitor* visitor );

    virtual void entered( SequenceElement* child );

    virtual void calcSizes( const ContextStyle& context,
                            ContextStyle::TextStyle tstyle,
                            ContextStyle::IndexStyle istyle,
                            StyleAttributes& style );

    virtual void draw( TQPainter& painter, const LuPixelRect& r,
                       const ContextStyle& context,
                       ContextStyle::TextStyle tstyle,
                       ContextStyle::IndexStyle istyle,
                       StyleAttributes& style,
                       const LuPixelPoint& parentOrigin );

    virtual TQString toLatex();
 
    virtual TQString formulaString();
 
    virtual void writeMathML( TQDomDocument& doc, TQDomNode& parent, bool oasisFormat = false ) const;
 
protected:
 
    //Save/load support

    virtual TQString getTagName() const { return "UNDERLINE"; }
 
private:
};
 
 
KFORMULA_NAMESPACE_END
 
#endif // BRACKETELEMENT_H