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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.
+*/
+
+#include <qstring.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;
+}
+
+
+/**
+ * Returns the element the point is in.
+ */
+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;
+}
+
+/**
+ * Returns our position inside the widget.
+ */
+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);
+}
+
+
+/**
+ * Sets the cursor inside this element to its start position.
+ * For most elements that is the main child.
+ */
+void BasicElement::goInside(FormulaCursor* cursor)
+{
+ BasicElement* mainChild = getMainChild();
+ if (mainChild != 0) {
+ mainChild->goInside(cursor);
+ }
+}
+
+
+void BasicElement::entered( SequenceElement* /*child*/ )
+{
+ formula()->tell( "" );
+}
+
+
+/**
+ * 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.
+ */
+void BasicElement::moveLeft(FormulaCursor* cursor, BasicElement*)
+{
+ getParent()->moveLeft(cursor, this);
+}
+
+
+/**
+ * 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.
+ */
+void BasicElement::moveRight(FormulaCursor* cursor, BasicElement*)
+{
+ getParent()->moveRight(cursor, this);
+}
+
+
+/**
+ * Moves the cursor to a normal place where new elements
+ * might be inserted.
+ */
+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);
+ }
+ }
+}
+
+
+QDomElement BasicElement::getElementDom( QDomDocument& doc)
+{
+ QDomElement de = doc.createElement(getTagName());
+ writeDom(de);
+ return de;
+}
+
+
+void BasicElement::writeMathML( QDomDocument& doc, QDomNode& parent, bool oasisFormat ) const
+{
+ QDomElement de = doc.createElement( oasisFormat ? "math:" + getElementName() : getElementName() );
+ writeMathMLAttributes( de );
+ writeMathMLContent( doc, de, oasisFormat );
+ parent.appendChild( de );
+}
+
+bool BasicElement::buildFromDom(QDomElement element)
+{
+ if (element.tagName() != getTagName()) {
+ kdWarning( DEBUGID ) << "Wrong tag name " << element.tagName().latin1() << " for " << getTagName().latin1() << ".\n";
+ return false;
+ }
+ if (!readAttributesFromDom(element)) {
+ return false;
+ }
+ QDomNode node = element.firstChild();
+ return readContentFromDom(node);
+}
+
+int BasicElement::buildFromMathMLDom(QDomElement element)
+{/*
+ if (element.tagName() != getTagName()) {
+ kdWarning( DEBUGID ) << "Wrong tag name " << element.tagName().latin1() << " for " << getTagName().latin1() << ".\n";
+ return false;
+ }*/
+ if (!readAttributesFromMathMLDom(element)) {
+ return -1;
+ }
+ QDomNode node = element.firstChild();
+ return readContentFromMathMLDom(node);
+}
+
+/**
+ * Appends our attributes to the dom element.
+ */
+void BasicElement::writeDom(QDomElement)
+{
+}
+
+/**
+ * Reads our attributes from the element.
+ * Returns false if it failed.
+ */
+bool BasicElement::readAttributesFromDom(QDomElement)
+{
+ return true;
+}
+
+/**
+ * Reads our content from the node. Sets the node to the next node
+ * that needs to be read.
+ * Returns false if it failed.
+ */
+bool BasicElement::readContentFromDom(QDomNode&)
+{
+ return true;
+}
+
+/**
+ * Returns a SequenceElement constructed from the nodes first child
+ * if the nodes name matches the given name.
+ */
+bool BasicElement::buildChild( SequenceElement* child, QDomNode node, QString name )
+{
+ if (node.isElement()) {
+ QDomElement e = node.toElement();
+ if (e.tagName().upper() == name) {
+ QDomNode nodeInner = e.firstChild();
+ if (nodeInner.isElement()) {
+ QDomElement element = nodeInner.toElement();
+ return child->buildFromDom( element );
+ }
+ }
+ }
+ return false;
+}
+
+/**
+ * Reads our attributes from the MathML element.
+ * Returns false if it failed.
+ */
+bool BasicElement::readAttributesFromMathMLDom(const QDomElement& )
+{
+ return true;
+}
+
+/**
+ * Reads our content from the MathML node. Sets the node to the next node
+ * that needs to be read.
+ * Returns false if it failed.
+ */
+int BasicElement::readContentFromMathMLDom(QDomNode&)
+{
+ return 1;
+}
+
+QString BasicElement::toLatex()
+{
+ return "{}";
+}
+
+/**
+ * Utility function that sets the size type and returns the size value from
+ * a MathML attribute string with unit as defined in Section 2.4.4.2
+ *
+ * @returns the size value
+ *
+ * @param str the attribute string.
+ * @param st size type container. It will be properly assigned to its size
+ * type or NoSize if str is invalid
+ */
+double BasicElement::getSize( const QString& 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 QString& 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;
+}
+
+
+/**
+ * Used internally by getSize()
+ */
+double BasicElement::str2size( const QString& str, SizeType *st, uint index, SizeType type )
+{
+ QString 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