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Diffstat (limited to 'lib/kformula/rootelement.cc')
| -rw-r--r-- | lib/kformula/rootelement.cc | 680 |
1 files changed, 680 insertions, 0 deletions
diff --git a/lib/kformula/rootelement.cc b/lib/kformula/rootelement.cc new file mode 100644 index 00000000..08a738f2 --- /dev/null +++ b/lib/kformula/rootelement.cc @@ -0,0 +1,680 @@ +/* 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 <qpainter.h> +#include <qpen.h> + +#include <kdebug.h> +#include <klocale.h> + +#include "elementvisitor.h" +#include "formulacursor.h" +#include "formulaelement.h" +#include "kformulacommand.h" +#include "rootelement.h" +#include "sequenceelement.h" + +KFORMULA_NAMESPACE_BEGIN + + +class RootSequenceElement : public SequenceElement { + typedef SequenceElement inherited; +public: + + RootSequenceElement( BasicElement* parent = 0 ) : SequenceElement( parent ) {} + virtual RootSequenceElement* clone() { + return new RootSequenceElement( *this ); + } + + /** + * This is called by the container to get a command depending on + * the current cursor position (this is how the element gets chosen) + * and the request. + * + * @returns the command that performs the requested action with + * the containers active cursor. + */ + virtual KCommand* buildCommand( Container*, Request* ); +}; + + +KCommand* RootSequenceElement::buildCommand( Container* container, Request* request ) +{ + FormulaCursor* cursor = container->activeCursor(); + if ( cursor->isReadOnly() ) { + return 0; + } + + switch ( *request ) { + case req_addIndex: { + FormulaCursor* cursor = container->activeCursor(); + if ( cursor->isSelection() || + ( cursor->getPos() > 0 && cursor->getPos() < countChildren() ) ) { + break; + } + IndexRequest* ir = static_cast<IndexRequest*>( request ); + if ( ir->index() == upperLeftPos ) { + RootElement* element = static_cast<RootElement*>( getParent() ); + ElementIndexPtr index = element->getIndex(); + if ( !index->hasIndex() ) { + KFCAddGenericIndex* command = new KFCAddGenericIndex( container, index ); + return command; + } + else { + index->moveToIndex( cursor, afterCursor ); + cursor->setSelection( false ); + formula()->cursorHasMoved( cursor ); + return 0; + } + } + } + default: + break; + } + return inherited::buildCommand( container, request ); +} + + +RootElement::RootElement(BasicElement* parent) + : BasicElement(parent) +{ + content = new RootSequenceElement( this ); + index = 0; +} + +RootElement::~RootElement() +{ + delete index; + delete content; +} + + +RootElement::RootElement( const RootElement& other ) + : BasicElement( other ) +{ + content = new RootSequenceElement( *dynamic_cast<RootSequenceElement*>( other.content ) ); + if ( other.index ) { + index = new SequenceElement( *( other.index ) ); + index->setParent( this ); + } + else { + index = 0; + } +} + + +bool RootElement::accept( ElementVisitor* visitor ) +{ + return visitor->visit( this ); +} + + +void RootElement::entered( SequenceElement* child ) +{ + if ( child == content ) { + formula()->tell( i18n( "Main list of root" ) ); + } + else { + formula()->tell( i18n( "Index" ) ); + } +} + + +BasicElement* RootElement::goToPos( FormulaCursor* cursor, bool& handled, + const LuPixelPoint& point, const LuPixelPoint& parentOrigin) +{ + BasicElement* e = BasicElement::goToPos(cursor, handled, point, parentOrigin); + if (e != 0) { + LuPixelPoint myPos(parentOrigin.x() + getX(), + parentOrigin.y() + getY()); + + e = content->goToPos(cursor, handled, point, myPos); + if (e != 0) { + return e; + } + if (hasIndex()) { + e = index->goToPos(cursor, handled, point, myPos); + if (e != 0) { + return e; + } + } + + //int dx = point.x() - myPos.x(); + luPixel dy = point.y() - myPos.y(); + + // the position after the index + if (hasIndex()) { + if (dy < index->getHeight()) { + index->moveLeft(cursor, this); + handled = true; + return index; + } + } + + return this; + } + return 0; +} + + +/** + * Calculates our width and height and + * our children's parentPosition. + */ +void RootElement::calcSizes( const ContextStyle& context, + ContextStyle::TextStyle tstyle, + ContextStyle::IndexStyle istyle, + StyleAttributes& style ) +{ + content->calcSizes( context, tstyle, + context.convertIndexStyleLower(istyle), style ); + + luPixel indexWidth = 0; + luPixel indexHeight = 0; + if (hasIndex()) { + index->calcSizes( context, + context.convertTextStyleIndex(tstyle), + context.convertIndexStyleUpper(istyle), + style ); + indexWidth = index->getWidth(); + indexHeight = index->getHeight(); + } + + double factor = style.sizeFactor(); + luPixel distX = context.ptToPixelX( context.getThinSpace( tstyle, factor ) ); + luPixel distY = context.ptToPixelY( context.getThinSpace( tstyle, factor ) ); + luPixel unit = (content->getHeight() + distY)/ 3; + + if (hasIndex()) { + if (indexWidth > unit) { + index->setX(0); + rootOffset.setX( indexWidth - unit ); + } + else { + index->setX( ( unit - indexWidth )/2 ); + rootOffset.setX(0); + } + if (indexHeight > unit) { + index->setY(0); + rootOffset.setY( indexHeight - unit ); + } + else { + index->setY( unit - indexHeight ); + rootOffset.setY(0); + } + } + else { + rootOffset.setX(0); + rootOffset.setY(0); + } + + setWidth( content->getWidth() + unit+unit/3+ rootOffset.x() + distX/2 ); + setHeight( content->getHeight() + distY*2 + rootOffset.y() ); + + content->setX( rootOffset.x() + unit+unit/3 ); + content->setY( rootOffset.y() + distY ); + setBaseline(content->getBaseline() + content->getY()); +} + +/** + * 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. + */ +void RootElement::draw( QPainter& painter, const LuPixelRect& r, + const ContextStyle& context, + ContextStyle::TextStyle tstyle, + ContextStyle::IndexStyle istyle, + StyleAttributes& style, + const LuPixelPoint& parentOrigin ) +{ + LuPixelPoint myPos( parentOrigin.x()+getX(), parentOrigin.y()+getY() ); + //if ( !LuPixelRect( myPos.x(), myPos.y(), getWidth(), getHeight() ).intersects( r ) ) + // return; + + content->draw( painter, r, context, tstyle, + context.convertIndexStyleLower(istyle), style, myPos); + if (hasIndex()) { + index->draw(painter, r, context, + context.convertTextStyleIndex(tstyle), + context.convertIndexStyleUpper(istyle), style, myPos); + } + + luPixel x = myPos.x() + rootOffset.x(); + luPixel y = myPos.y() + rootOffset.y(); + //int distX = context.getDistanceX(tstyle); + double factor = style.sizeFactor(); + luPixel distY = context.ptToPixelY( context.getThinSpace( tstyle, factor ) ); + luPixel unit = (content->getHeight() + distY)/ 3; + + painter.setPen( QPen( style.color(), + context.layoutUnitToPixelX( 2*context.getLineWidth( factor ) ) ) ); + painter.drawLine( context.layoutUnitToPixelX( x+unit/3 ), + context.layoutUnitToPixelY( y+unit+distY/3 ), + context.layoutUnitToPixelX( x+unit/2+unit/3 ), + context.layoutUnitToPixelY( myPos.y()+getHeight() ) ); + + painter.setPen( QPen( style.color(), + context.layoutUnitToPixelY( context.getLineWidth( factor ) ) ) ); + + painter.drawLine( context.layoutUnitToPixelX( x+unit+unit/3 ), + context.layoutUnitToPixelY( y+distY/3 ), + context.layoutUnitToPixelX( x+unit/2+unit/3 ), + context.layoutUnitToPixelY( myPos.y()+getHeight() ) ); + painter.drawLine( context.layoutUnitToPixelX( x+unit+unit/3 ), + context.layoutUnitToPixelY( y+distY/3 ), + context.layoutUnitToPixelX( x+unit+unit/3+content->getWidth() ), + context.layoutUnitToPixelY( y+distY/3 ) ); + painter.drawLine( context.layoutUnitToPixelX( x+unit/3 ), + context.layoutUnitToPixelY( y+unit+distY/2 ), + context.layoutUnitToPixelX( x ), + context.layoutUnitToPixelY( y+unit+unit/2 ) ); +} + + +void RootElement::dispatchFontCommand( FontCommand* cmd ) +{ + content->dispatchFontCommand( cmd ); + if (hasIndex()) { + index->dispatchFontCommand( 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. + */ +void RootElement::moveLeft(FormulaCursor* cursor, BasicElement* from) +{ + if (cursor->isSelectionMode()) { + getParent()->moveLeft(cursor, this); + } + else { + bool linear = cursor->getLinearMovement(); + if (from == getParent()) { + content->moveLeft(cursor, this); + } + else if (from == content) { + if (linear && hasIndex()) { + index->moveLeft(cursor, this); + } + else { + getParent()->moveLeft(cursor, this); + } + } + else { + 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 RootElement::moveRight(FormulaCursor* cursor, BasicElement* from) +{ + if (cursor->isSelectionMode()) { + getParent()->moveRight(cursor, this); + } + else { + bool linear = cursor->getLinearMovement(); + if (from == getParent()) { + if (linear && hasIndex()) { + index->moveRight(cursor, this); + } + else { + content->moveRight(cursor, this); + } + } + else if (from == index) { + content->moveRight(cursor, this); + } + else { + getParent()->moveRight(cursor, this); + } + } +} + +/** + * Enters this element while moving up starting inside + * the element `from'. Searches for a cursor position inside + * this element or above it. + */ +void RootElement::moveUp(FormulaCursor* cursor, BasicElement* from) +{ + if (cursor->isSelectionMode()) { + getParent()->moveUp(cursor, this); + } + else { + if (from == getParent()) { + content->moveRight(cursor, this); + } + else if (from == content) { + if (hasIndex()) { + index->moveRight(cursor, this); + } + else { + getParent()->moveUp(cursor, this); + } + } + else { + getParent()->moveUp(cursor, this); + } + } +} + +/** + * Enters this element while moving down starting inside + * the element `from'. Searches for a cursor position inside + * this element or below it. + */ +void RootElement::moveDown(FormulaCursor* cursor, BasicElement* from) +{ + if (cursor->isSelectionMode()) { + getParent()->moveDown(cursor, this); + } + else { + if (from == getParent()) { + if (hasIndex()) { + index->moveRight(cursor, this); + } + else { + content->moveRight(cursor, this); + } + } + else if (from == index) { + content->moveRight(cursor, this); + } + else { + getParent()->moveDown(cursor, this); + } + } +} + +/** + * Reinserts the index if it has been removed. + */ +void RootElement::insert(FormulaCursor* cursor, + QPtrList<BasicElement>& newChildren, + Direction direction) +{ + if (cursor->getPos() == upperLeftPos) { + index = static_cast<SequenceElement*>(newChildren.take(0)); + index->setParent(this); + + if (direction == beforeCursor) { + index->moveLeft(cursor, this); + } + else { + index->moveRight(cursor, this); + } + cursor->setSelection(false); + formula()->changed(); + } +} + +/** + * 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 content. + */ +void RootElement::remove(FormulaCursor* cursor, + QPtrList<BasicElement>& removedChildren, + Direction direction) +{ + switch (cursor->getPos()) { + case contentPos: + getParent()->selectChild(cursor, this); + getParent()->remove(cursor, removedChildren, direction); + break; + case upperLeftPos: + removedChildren.append(index); + formula()->elementRemoval(index); + index = 0; + cursor->setTo(this, upperLeftPos); + formula()->changed(); + break; + } +} + + +/** + * Moves the cursor to a normal place where new elements + * might be inserted. + */ +void RootElement::normalize(FormulaCursor* cursor, Direction direction) +{ + if (direction == beforeCursor) { + content->moveLeft(cursor, this); + } + else { + content->moveRight(cursor, this); + } +} + + +// main child +// +// If an element has children one has to become the main one. + +SequenceElement* RootElement::getMainChild() +{ + return content; +} + +// void RootElement::setMainChild(SequenceElement* child) +// { +// formula()->elementRemoval(content); +// content = child; +// content->setParent(this); +// formula()->changed(); +// } + + +/** + * Sets the cursor to select the child. The mark is placed before, + * the position behind it. + */ +void RootElement::selectChild(FormulaCursor* cursor, BasicElement* child) +{ + if (child == content) { + cursor->setTo(this, contentPos); + } + else if (child == index) { + cursor->setTo(this, upperLeftPos); + } +} + + +void RootElement::moveToIndex(FormulaCursor* cursor, Direction direction) +{ + if (hasIndex()) { + if (direction == beforeCursor) { + index->moveLeft(cursor, this); + } + else { + index->moveRight(cursor, this); + } + } +} + +void RootElement::setToIndex(FormulaCursor* cursor) +{ + cursor->setTo(this, upperLeftPos); +} + + +/** + * Appends our attributes to the dom element. + */ +void RootElement::writeDom(QDomElement element) +{ + BasicElement::writeDom(element); + + QDomDocument doc = element.ownerDocument(); + + QDomElement con = doc.createElement("CONTENT"); + con.appendChild(content->getElementDom(doc)); + element.appendChild(con); + + if(hasIndex()) { + QDomElement ind = doc.createElement("ROOTINDEX"); + ind.appendChild(index->getElementDom(doc)); + element.appendChild(ind); + } +} + +/** + * Reads our attributes from the element. + * Returns false if it failed. + */ +bool RootElement::readAttributesFromDom(QDomElement element) +{ + return BasicElement::readAttributesFromDom(element); +} + +/** + * Reads our content from the node. Sets the node to the next node + * that needs to be read. + * Returns false if it failed. + */ +bool RootElement::readContentFromDom(QDomNode& node) +{ + if (!BasicElement::readContentFromDom(node)) { + return false; + } + + if ( !buildChild( content, node, "CONTENT" ) ) { + kdWarning( DEBUGID ) << "Empty content in RootElement." << endl; + return false; + } + node = node.nextSibling(); + + if ( node.nodeName().upper() == "ROOTINDEX" ) { + if ( !buildChild( index=new SequenceElement( this ), node, "ROOTINDEX" ) ) { + return false; + } + } + // backward compatibility + else if ( node.nodeName().upper() == "INDEX" ) { + if ( !buildChild( index=new SequenceElement( this ), node, "INDEX" ) ) { + return false; + } + } + node = node.nextSibling(); + + return true; +} + +/** + * Reads our attributes from the MathML element. + * Also checks whether it's a msqrt or mroot. + * Returns false if it failed. + */ +bool RootElement::readAttributesFromMathMLDom(const QDomElement& element) +{ + if ( element.tagName().lower() == "mroot" ) + square = false; + else + square = true; + 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 RootElement::readContentFromMathMLDom(QDomNode& node) +{ + if ( BasicElement::readContentFromMathMLDom( node ) == -1 ) { + return -1; + } + + if ( square ) { + // Any number of arguments are allowed + if ( content->readContentFromMathMLDom( node ) == -1 ) { + kdWarning( DEBUGID ) << "Empty content in RootElement." << endl; + return -1; + } + } + else { + // Exactly two arguments are required + int contentNumber = content->buildMathMLChild( node ); + if ( contentNumber == -1 ) { + kdWarning( DEBUGID ) << "Empty content in RootElement." << endl; + return -1; + } + for (int i = 0; i < contentNumber; i++ ) { + if ( node.isNull() ) { + return -1; + } + node = node.nextSibling(); + } + + index = new SequenceElement( this ); + if ( index->buildMathMLChild( node ) == -1 ) { + kdWarning( DEBUGID ) << "Empty index in RootElement." << endl; + return -1; + } + } + + return 1; +} + +QString RootElement::toLatex() +{ + QString root; + root="\\sqrt"; + if(hasIndex()) { + root+="["; + root+=index->toLatex(); + root+="]"; + } + root+="{"; + root+=content->toLatex(); + root+="}"; + + return root; +} + +QString RootElement::formulaString() +{ + if ( hasIndex() ) { + return "(" + content->formulaString() + ")**(1.0/(" + index->formulaString() + "))"; + } + return "sqrt(" + content->formulaString() + ")"; +} + +void RootElement::writeMathMLContent( QDomDocument& doc, QDomElement& element, bool oasisFormat ) const +{ + content->writeMathML( doc, element, oasisFormat ); + if( hasIndex() ) + { + index->writeMathML( doc, element, oasisFormat ); + } +} + +KFORMULA_NAMESPACE_END |