basicelement.cpp

/* 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.
*/
 
#include <tqstring.h>
#include <kdebug.h>
 
#include "contextstyle.h"
#include "basicelement.h"
#include "formulacursor.h"
#include "formulaelement.h"
#include "sequenceelement.h"
 
KFORMULA_NAMESPACE_BEGIN
using namespace std;
 
 
int BasicElement::evilDestructionCount = 0;
 
BasicElement::BasicElement( BasicElement* p )
        : parent( p ), m_baseline( 0 ), elementType( 0 )
{
    setX( 0 );
    setY( 0 );
    setWidth( 0 );
    setHeight( 0 );
    evilDestructionCount++;
}
 
BasicElement::~BasicElement()
{
    evilDestructionCount--;
}
 
BasicElement::BasicElement( const BasicElement& other )
    : parent( 0 ),
      m_baseline( other.m_baseline ),
      elementType( other.elementType )
{
    setX( other.getX() );
    setY( other.getY() );
    setWidth( other.getWidth() );
    setHeight( other.getHeight() );
    evilDestructionCount++;
}
 
 
bool BasicElement::readOnly( const BasicElement* /*child*/ ) const
{
    return parent->readOnly( this );
}
 
 
FormulaElement* BasicElement::formula()
{
    //if ( parent != 0 ) {
        return parent->formula();
        //}
        //return 0;
}
 

BasicElement* BasicElement::goToPos( FormulaCursor*, bool&,
                                     const LuPixelPoint& point, const LuPixelPoint& parentOrigin )
{
    luPixel x = point.x() - (parentOrigin.x() + getX());
    if ((x >= 0) && (x < getWidth())) {
        luPixel y = point.y() - (parentOrigin.y() + getY());
        if ((y >= 0) && (y < getHeight())) {
            return this;
        }
    }
    return 0;
}

LuPixelPoint BasicElement::widgetPos()
{
    luPixel x = 0;
    luPixel y = 0;
    for (BasicElement* element = this; element != 0; element = element->parent) {
        x += element->getX();
        y += element->getY();
    }
    return LuPixelPoint(x, y);
}
 

void BasicElement::goInside(FormulaCursor* cursor)
{
    BasicElement* mainChild = getMainChild();
    if (mainChild != 0) {
        mainChild->goInside(cursor);
    }
}
 
 
void BasicElement::entered( SequenceElement* /*child*/ )
{
    formula()->tell( "" );
}
 

void BasicElement::moveLeft(FormulaCursor* cursor, BasicElement*)
{
    getParent()->moveLeft(cursor, this);
}
 

void BasicElement::moveRight(FormulaCursor* cursor, BasicElement*)
{
    getParent()->moveRight(cursor, this);
}
 

void BasicElement::normalize(FormulaCursor* cursor, Direction direction)
{
    BasicElement* element = getMainChild();
    if (element != 0) {
        if (direction == beforeCursor) {
            element->moveLeft(cursor, this);
        }
        else {
            element->moveRight(cursor, this);
        }
    }
}
 
 
TQDomElement BasicElement::getElementDom( TQDomDocument& doc)
{
    TQDomElement de = doc.createElement(getTagName());
    writeDom(de);
    return de;
}
 
 
void BasicElement::writeMathML( TQDomDocument& doc, TQDomNode& parent, bool oasisFormat ) const
{
    TQDomElement de = doc.createElement( oasisFormat ? "math:" + getElementName() : getElementName() );
    writeMathMLAttributes( de );
    writeMathMLContent( doc, de, oasisFormat );
    parent.appendChild( de );
}
 
bool BasicElement::buildFromDom(TQDomElement element)
{
    if (element.tagName() != getTagName()) {
        kdWarning( DEBUGID ) << "Wrong tag name " << element.tagName().latin1() << " for " << getTagName().latin1() << ".\n";
        return false;
    }
    if (!readAttributesFromDom(element)) {
        return false;
    }
    TQDomNode node = element.firstChild();
    return readContentFromDom(node);
}
 
int BasicElement::buildFromMathMLDom(TQDomElement element)
{/*
    if (element.tagName() != getTagName()) {
        kdWarning( DEBUGID ) << "Wrong tag name " << element.tagName().latin1() << " for " << getTagName().latin1() << ".\n";
        return false;
        }*/
    if (!readAttributesFromMathMLDom(element)) {
        return -1;
        }
    TQDomNode node = element.firstChild();
    return readContentFromMathMLDom(node);
}

void BasicElement::writeDom(TQDomElement)
{
}

bool BasicElement::readAttributesFromDom(TQDomElement)
{
    return true;
}

bool BasicElement::readContentFromDom(TQDomNode&)
{
    return true;
}

bool BasicElement::buildChild( SequenceElement* child, TQDomNode node, TQString name )
{
    if (node.isElement()) {
        TQDomElement e = node.toElement();
        if (e.tagName().upper() == name) {
            TQDomNode nodeInner = e.firstChild();
            if (nodeInner.isElement()) {
                TQDomElement element = nodeInner.toElement();
                return child->buildFromDom( element );
            }
        }
    }
    return false;
}

bool BasicElement::readAttributesFromMathMLDom(const TQDomElement& )
{
    return true;
}

int BasicElement::readContentFromMathMLDom(TQDomNode&)
{
    return 1;
}
 
TQString BasicElement::toLatex()
{
    return "{}";
}

double BasicElement::getSize( const TQString& str, SizeType* st )
{
    int index = str.find( "%" );
    if ( index != -1 ) {
        return str2size( str, st, index, RelativeSize ) / 100.0;
    }
    index = str.find( "pt", 0, false );
    if ( index != -1 ) {
        return str2size( str, st, index, AbsoluteSize );
    }
    index = str.find( "mm", 0, false );
    if ( index != -1 ) {
        return str2size( str, st, index, AbsoluteSize ) * 72.0 / 20.54;
    }
    index = str.find( "cm", 0, false );
    if ( index != -1 ) {
        return str2size( str, st, index, AbsoluteSize ) * 72.0 / 2.54;
    }
    index = str.find( "in", 0, false );
    if ( index != -1 ) {
        return str2size( str, st, index, AbsoluteSize ) * 72.0;
    }
    index = str.find( "em", 0, false );
    if ( index != -1 ) {
        return str2size( str, st, index, RelativeSize );
    }
    index = str.find( "ex", 0, false );
    if ( index != -1 ) {
        return str2size( str, st, index, RelativeSize );
    }
    index = str.find( "pc", 0, false );
    if ( index != -1 ) {
        return str2size( str, st, index, AbsoluteSize ) * 12.0;
    }
    index = str.find( "px", 0, false );
    if ( index != -1 ) {
        return str2size( str, st, index, PixelSize );
    }
    // If there's no unit, assume 'pt'
    return str2size( str, st, str.length(),AbsoluteSize );
}
 
SizeType BasicElement::getSpace( const TQString& str )
{
    if ( str == "negativeveryverythinmathspace" ) {
        return NegativeVeryVeryThinMathSpace;
    }
    if ( str == "negativeverythinmathspace" ) {
        return NegativeVeryThinMathSpace;
    }
    if ( str == "negativethinmathspace" ) {
        return NegativeThinMathSpace;
    }
    if ( str == "negativemediummathspace" ) {
        return NegativeMediumMathSpace;
    }
    if ( str == "negativethickmathspace" ) {
        return NegativeThickMathSpace;
    }
    if ( str == "negativeverythickmathspace" ) {
        return NegativeVeryThickMathSpace;
    }
    if ( str == "negativeveryverythickmathspace" ) {
        return NegativeVeryVeryThickMathSpace;
    }
    if ( str == "veryverythinmathspace" ) {
        return VeryVeryThinMathSpace;
    }
    if ( str == "verythinmathspace" ) {
        return VeryThinMathSpace;
    }
    if ( str == "thinmathspace" ) {
        return ThinMathSpace;
    }
    if ( str == "mediummathspace" ) {
        return MediumMathSpace;
    }
    if ( str == "thickmathspace" ) {
        return ThickMathSpace;
    }
    if ( str == "verythickmathspace" ) {
        return VeryThickMathSpace;
    }
    if ( str == "veryverythickmathspace" ) {
        return VeryVeryThickMathSpace;
    }
    return NoSize;
}
 

double BasicElement::str2size( const TQString& str, SizeType *st, uint index, SizeType type )
{
    TQString num = str.left( index );
    bool ok;
    double size = num.toDouble( &ok );
    if ( ok ) {
        if ( st ) {
            *st = type;
        }
        return size;
    }
    if ( st ) {
        *st = NoSize;
    }
    return -1;
}
 
KFORMULA_NAMESPACE_END