Added old abandoned KDE3 version of koffice

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/koffice@1077364 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 255 insertions, 0 deletions

diff --git a/lib/kformula/fractionelement.h b/lib/kformula/fractionelement.h
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+++ b/lib/kformula/fractionelement.h
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+/* 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 FRACTIONELEMENT_H
+#define FRACTIONELEMENT_H
+
+#include "basicelement.h"
+
+KFORMULA_NAMESPACE_BEGIN
+class SequenceElement;
+
+
+/**
+ * A fraction.
+ */
+class FractionElement : public BasicElement {
+    FractionElement& operator=( const FractionElement& ) { return *this; }
+public:
+
+    enum { numeratorPos, denominatorPos };
+
+    FractionElement(BasicElement* parent = 0);
+    ~FractionElement();
+
+    FractionElement( const FractionElement& );
+
+    virtual FractionElement* clone() {
+        return new FractionElement( *this );
+    }
+
+    virtual bool accept( ElementVisitor* visitor );
+
+    /**
+     * @returns the type of this element. Used for
+     * parsing a sequence.
+     */
+    virtual TokenType getTokenType() const { return INNER; }
+
+    /**
+     * The cursor has entered one of our child sequences.
+     * This is a good point to tell the user where he is.
+     */
+    virtual void entered( SequenceElement* child );
+
+    /**
+     * Sets the cursor and returns the element the point is in.
+     * The handled flag shows whether the cursor has been set.
+     * This is needed because only the innermost matching element
+     * is allowed to set the cursor.
+     */
+    virtual BasicElement* goToPos( FormulaCursor*, bool& handled,
+                                   const LuPixelPoint& point, const LuPixelPoint& parentOrigin );
+
+    /**
+     * Calculates our width and height and
+     * our children's parentPosition.
+     */
+    virtual void calcSizes( const ContextStyle& cstyle,
+						    ContextStyle::TextStyle tstyle,
+						    ContextStyle::IndexStyle istyle,
+							StyleAttributes& style );
+
+    /**
+     * Draws the whole element including its children.
+     * The `parentOrigin' is the point this element's parent starts.
+     * We can use our parentPosition to get our own origin then.
+     */
+    virtual void draw( QPainter& painter, const LuPixelRect& r,
+                       const ContextStyle& cstyle,
+                       ContextStyle::TextStyle tstyle,
+                       ContextStyle::IndexStyle istyle,
+					   StyleAttributes& style,
+                       const LuPixelPoint& parentOrigin );
+
+    /**
+     * Dispatch this FontCommand to all our TextElement children.
+     */
+    virtual void dispatchFontCommand( FontCommand* cmd );
+
+    /**
+     * Enters this element while moving to the left starting inside
+     * the element `from'. Searches for a cursor position inside
+     * this element or to the left of it.
+     */
+    virtual void moveLeft(FormulaCursor* cursor, BasicElement* from);
+
+    /**
+     * Enters this element while moving to the right starting inside
+     * the element `from'. Searches for a cursor position inside
+     * this element or to the right of it.
+     */
+    virtual void moveRight(FormulaCursor* cursor, BasicElement* from);
+
+    /**
+     * Enters this element while moving up starting inside
+     * the element `from'. Searches for a cursor position inside
+     * this element or above it.
+     */
+    virtual void moveUp(FormulaCursor* cursor, BasicElement* from);
+
+    /**
+     * Enters this element while moving down starting inside
+     * the element `from'. Searches for a cursor position inside
+     * this element or below it.
+     */
+    virtual void moveDown(FormulaCursor* cursor, BasicElement* from);
+
+    /**
+     * Reinserts the denominator if it has been removed.
+     */
+    virtual void insert(FormulaCursor*, QPtrList<BasicElement>&, Direction);
+
+    /**
+     * Removes all selected children and returns them. Places the
+     * cursor to where the children have been.
+     *
+     * We remove ourselve if we are requested to remove our numerator.
+     *
+     * It is possible to remove the denominator. But after this we
+     * are senseless and the caller is required to replace us.
+     */
+    virtual void remove(FormulaCursor*, QPtrList<BasicElement>&, Direction);
+
+
+    // main child
+    //
+    // If an element has children one has to become the main one.
+
+    virtual SequenceElement* getMainChild();
+
+    SequenceElement* getNumerator() { return numerator; }
+    SequenceElement* getDenominator() { return denominator; }
+
+    /**
+     * Returns wether the element has no more useful
+     * children (except its main child) and should therefore
+     * be replaced by its main child's content.
+     */
+    virtual bool isSenseless();
+
+    /**
+     * Sets the cursor to select the child. The mark is placed before,
+     * the position behind it.
+     */
+    virtual void selectChild(FormulaCursor* cursor, BasicElement* child);
+
+    /**
+     * Moves the cursor away from the given child. The cursor is
+     * guaranteed to be inside this element.
+     */
+    //virtual void childWillVanish(FormulaCursor* cursor, BasicElement* child) = 0;
+
+    /**
+     * Tells whether the fraction should be drawn with a line.
+     */
+    void showLine(bool line) { 
+        m_lineThicknessType = RelativeSize;
+        if ( line ) {
+            m_lineThickness = 1.0;
+        }
+        else {
+            m_lineThickness = 0.0;
+        }
+    }
+
+    /**
+     * @returns the latex representation of the element and
+     * of the element's children
+     */
+    virtual QString toLatex();
+
+    virtual QString formulaString();
+
+protected:
+
+    //Save/load support
+
+    /**
+     * Returns the tag name of this element type.
+     */
+    virtual QString getTagName() const { return "FRACTION"; }
+
+    /**
+     * Appends our attributes to the dom element.
+     */
+    virtual void writeDom(QDomElement element);
+
+    /**
+     * Reads our attributes from the element.
+     * Returns false if it failed.
+     */
+    virtual bool readAttributesFromDom(QDomElement element);
+
+    /**
+     * Reads our content from the node. Sets the node to the next node
+     * that needs to be read.
+     * Returns false if it failed.
+     */
+    virtual bool readContentFromDom(QDomNode& node);
+
+    /**
+     * Reads our attributes from the MathML element.
+     * Returns false if it failed.
+     */
+	virtual bool readAttributesFromMathMLDom(const QDomElement& element);
+
+    /**
+     * Reads our content from the MathML node. Sets the node to the next node
+     * that needs to be read.
+     * Returns false if it failed.
+     */
+	virtual int readContentFromMathMLDom(QDomNode& node);
+
+private:
+    virtual QString getElementName() const { return "mfrac"; }
+    virtual void writeMathMLAttributes( QDomElement& element ) const ;
+    virtual void writeMathMLContent( QDomDocument& doc, 
+                                     QDomElement& element,
+                                     bool oasisFormat ) const ;
+
+    double lineThickness( const ContextStyle& context, double factor );
+
+    bool withLine() { return m_lineThicknessType == NoSize || m_lineThickness != 0.0; }
+
+    SequenceElement* numerator;
+    SequenceElement* denominator;
+
+    SizeType m_lineThicknessType;
+    double m_lineThickness;
+    HorizontalAlign m_numAlign;
+    HorizontalAlign m_denomAlign;
+    bool m_customBevelled;
+    bool m_bevelled;
+};
+
+KFORMULA_NAMESPACE_END
+
+#endif // FRACTIONELEMENT_H