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437 lines
13 KiB
437 lines
13 KiB
/* This file is part of the KDE project
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Copyright (C) 2001 Andrea Rizzi <rizzi@kde.org>
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Ulrich Kuettler <ulrich.kuettler@mailbox.tu-dresden.de>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef BRACKETELEMENT_H
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#define BRACKETELEMENT_H
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#include <tqpoint.h>
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#include <tqsize.h>
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#include "basicelement.h"
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KFORMULA_NAMESPACE_BEGIN
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class Artwork;
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class SequenceElement;
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/**
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* The base of (all) elements that contain just one content element.
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* (No indexes.)
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*/
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class SingleContentElement : public BasicElement {
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SingleContentElement& operator=( const SingleContentElement& ) { return *this; }
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public:
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SingleContentElement(BasicElement* parent = 0);
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~SingleContentElement();
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SingleContentElement( const SingleContentElement& );
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/**
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* @returns the character that represents this element. Used for
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* parsing a sequence.
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* This is guaranteed to be TQChar::null for all non-text elements.
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*/
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virtual TQChar getCharacter() const;
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/**
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* Sets the cursor and returns the element the point is in.
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* The handled flag shows whether the cursor has been set.
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* This is needed because only the innermost matching element
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* is allowed to set the cursor.
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*/
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virtual BasicElement* goToPos( FormulaCursor*, bool& handled,
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const LuPixelPoint& point, const LuPixelPoint& parentOrigin );
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/**
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* Dispatch this FontCommand to all our TextElement children.
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*/
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virtual void dispatchFontCommand( FontCommand* cmd );
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/**
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* Enters this element while moving to the left starting inside
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* the element `from'. Searches for a cursor position inside
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* this element or to the left of it.
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*/
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virtual void moveLeft(FormulaCursor* cursor, BasicElement* from);
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/**
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* Enters this element while moving to the right starting inside
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* the element `from'. Searches for a cursor position inside
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* this element or to the right of it.
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*/
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virtual void moveRight(FormulaCursor* cursor, BasicElement* from);
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/**
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* Enters this element while moving up starting inside
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* the element `from'. Searches for a cursor position inside
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* this element or above it.
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*/
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virtual void moveUp(FormulaCursor* cursor, BasicElement* from);
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/**
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* Enters this element while moving down starting inside
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* the element `from'. Searches for a cursor position inside
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* this element or below it.
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*/
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virtual void moveDown(FormulaCursor* cursor, BasicElement* from);
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/**
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* Removes all selected children and returns them. Places the
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* cursor to where the children have been.
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*
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* We remove ourselve if we are requested to remove our content.
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*/
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virtual void remove(FormulaCursor*, TQPtrList<BasicElement>&, Direction);
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/**
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* Moves the cursor to a normal place where new elements
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* might be inserted.
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*/
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virtual void normalize(FormulaCursor*, Direction);
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// main child
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//
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// If an element has children one has to become the main one.
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virtual SequenceElement* getMainChild();
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/**
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* Sets the cursor to select the child. The mark is placed before,
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* the position behind it.
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*/
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virtual void selectChild(FormulaCursor* cursor, BasicElement* child);
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protected:
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/**
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* Appends our attributes to the dom element.
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*/
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virtual void writeDom(TQDomElement element);
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virtual void writeMathMLContent( TQDomDocument& doc,
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TQDomElement& element,
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bool oasisFormat ) const;
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/**
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* Reads our content from the node. Sets the node to the next node
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* that needs to be read.
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* Returns false if it failed.
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*/
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virtual bool readContentFromDom(TQDomNode& node);
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/**
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* Reads our content from the MathML node. Sets the node to the next node
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* that needs to be read.
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* Returns false if it failed.
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*/
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virtual int readContentFromMathMLDom(TQDomNode& node);
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SequenceElement* getContent() { return content; }
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private:
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/**
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* The one below the graph.
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*/
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SequenceElement* content;
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};
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/**
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* A left and/or right bracket around one child.
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*/
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class BracketElement : public SingleContentElement {
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typedef SingleContentElement inherited;
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BracketElement& operator=( const BracketElement& ) { return *this; }
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public:
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enum { contentPos };
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BracketElement(SymbolType left = EmptyBracket, SymbolType right = EmptyBracket,
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BasicElement* parent = 0);
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~BracketElement();
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BracketElement( const BracketElement& );
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virtual BracketElement* clone() {
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return new BracketElement( *this );
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}
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virtual bool accept( ElementVisitor* visitor );
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/**
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* @returns the type of this element. Used for
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* parsing a sequence.
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*/
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virtual TokenType getTokenType() const { return BRACKET; }
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/**
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* The cursor has entered one of our child sequences.
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* This is a good point to tell the user where he is.
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*/
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virtual void entered( SequenceElement* child );
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/**
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* Sets the cursor and returns the element the point is in.
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* The handled flag shows whether the cursor has been set.
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* This is needed because only the innermost matching element
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* is allowed to set the cursor.
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*/
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virtual BasicElement* goToPos( FormulaCursor*, bool& handled,
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const LuPixelPoint& point, const LuPixelPoint& parentOrigin );
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/**
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* Calculates our width and height and
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* our children's parentPosition.
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*/
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virtual void calcSizes( const ContextStyle& context,
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ContextStyle::TextStyle tstyle,
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ContextStyle::IndexStyle istyle,
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StyleAttributes& style );
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/**
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* Draws the whole element including its children.
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* The `parentOrigin' is the point this element's parent starts.
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* We can use our parentPosition to get our own origin then.
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*/
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virtual void draw( TQPainter& painter, const LuPixelRect& r,
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const ContextStyle& context,
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ContextStyle::TextStyle tstyle,
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ContextStyle::IndexStyle istyle,
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StyleAttributes& style,
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const LuPixelPoint& parentOrigin );
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protected:
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//Save/load support
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/**
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* Returns the tag name of this element type.
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*/
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virtual TQString getTagName() const { return "BRACKET"; }
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/**
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* Reads our attributes from the element.
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* Returns false if it failed.
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*/
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virtual bool readAttributesFromDom(TQDomElement element);
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virtual void writeDom(TQDomElement element);
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virtual TQString getElementName() const { return "mfenced"; }
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virtual void writeMathMLAttributes( TQDomElement& element ) const;
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/**
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* Reads our attributes from the MathML element.
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* Returns false if it failed.
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*/
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virtual bool readAttributesFromMathMLDom(const TQDomElement& element);
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/**
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* Reads our content from the MathML node. Sets the node to the next node
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* that needs to be read. It is sometimes needed to read more than one node
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* (e. g. for fence operators).
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* Returns the number of nodes processed or -1 if it failed.
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*/
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virtual int readContentFromMathMLDom(TQDomNode& node);
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/**
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* @returns the latex representation of the element and
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* of the element's children
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*/
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virtual TQString toLatex();
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virtual TQString formulaString();
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private:
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/**
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* @return a LaTex string for the given symbol
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*/
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TQString latexString(char);
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/**
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* Set left and right types in operator fences
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* @param open if true set SymbolType for open (left) bracket,
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* otherwise set for close (right) bracket.
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*/
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int operatorType( TQDomNode& node, bool open );
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/**
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* Search through the nodes to find the close operator to match current
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* open bracket.
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*/
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int searchOperator( const TQDomNode& node );
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/**
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* The brackets we are showing.
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*/
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Artwork* left;
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Artwork* right;
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SymbolType leftType;
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SymbolType rightType;
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TQString m_separators;
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bool m_operator;
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bool m_customLeft;
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bool m_customRight;
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};
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/**
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* A line above the content.
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*/
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class OverlineElement : public SingleContentElement {
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OverlineElement& operator=( const OverlineElement& ) { return *this; }
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public:
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OverlineElement(BasicElement* parent = 0);
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~OverlineElement();
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OverlineElement( const OverlineElement& );
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virtual OverlineElement* clone() {
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return new OverlineElement( *this );
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}
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virtual bool accept( ElementVisitor* visitor );
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/**
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* The cursor has entered one of our child sequences.
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* This is a good point to tell the user where he is.
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*/
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virtual void entered( SequenceElement* child );
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/**
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* Calculates our width and height and
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* our children's parentPosition.
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*/
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virtual void calcSizes( const ContextStyle& context,
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ContextStyle::TextStyle tstyle,
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ContextStyle::IndexStyle istyle,
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StyleAttributes& style );
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/**
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* Draws the whole element including its children.
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* The `parentOrigin' is the point this element's parent starts.
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* We can use our parentPosition to get our own origin then.
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*/
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virtual void draw( TQPainter& painter, const LuPixelRect& r,
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const ContextStyle& context,
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ContextStyle::TextStyle tstyle,
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ContextStyle::IndexStyle istyle,
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StyleAttributes& style,
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const LuPixelPoint& parentOrigin );
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/**
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* @returns the latex representation of the element and
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* of the element's children
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*/
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virtual TQString toLatex();
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virtual TQString formulaString();
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virtual void writeMathML( TQDomDocument& doc, TQDomNode& parent, bool oasisFormat = false ) const;
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protected:
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//Save/load support
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/**
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* Returns the tag name of this element type.
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*/
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virtual TQString getTagName() const { return "OVERLINE"; }
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private:
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};
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/**
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* A line below the content.
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*/
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class UnderlineElement : public SingleContentElement {
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UnderlineElement& operator=( const UnderlineElement& ) { return *this; }
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public:
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UnderlineElement(BasicElement* parent = 0);
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~UnderlineElement();
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UnderlineElement( const UnderlineElement& );
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virtual UnderlineElement* clone() {
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return new UnderlineElement( *this );
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}
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virtual bool accept( ElementVisitor* visitor );
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/**
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* The cursor has entered one of our child sequences.
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* This is a good point to tell the user where he is.
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*/
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virtual void entered( SequenceElement* child );
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/**
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* Calculates our width and height and
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* our children's parentPosition.
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*/
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virtual void calcSizes( const ContextStyle& context,
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ContextStyle::TextStyle tstyle,
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ContextStyle::IndexStyle istyle,
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StyleAttributes& style );
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/**
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* Draws the whole element including its children.
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* The `parentOrigin' is the point this element's parent starts.
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* We can use our parentPosition to get our own origin then.
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*/
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virtual void draw( TQPainter& painter, const LuPixelRect& r,
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const ContextStyle& context,
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ContextStyle::TextStyle tstyle,
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ContextStyle::IndexStyle istyle,
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StyleAttributes& style,
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const LuPixelPoint& parentOrigin );
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/**
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* @returns the latex representation of the element and
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* of the element's children
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*/
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virtual TQString toLatex();
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virtual TQString formulaString();
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virtual void writeMathML( TQDomDocument& doc, TQDomNode& parent, bool oasisFormat = false ) const;
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protected:
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//Save/load support
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/**
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* Returns the tag name of this element type.
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*/
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virtual TQString getTagName() const { return "UNDERLINE"; }
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private:
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};
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KFORMULA_NAMESPACE_END
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#endif // BRACKETELEMENT_H
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