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koffice/lib/kformula/rootelement.cc

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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 <tqpainter.h>
#include <tqpen.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 tqchildren'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 tqchildren.
* The `parentOrigin' is the point this element's parent starts.
* We can use our parentPosition to get our own origin then.
*/
void RootElement::draw( TQPainter& 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( TQPen( 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( TQPen( 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,
TQPtrList<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 tqchildren and returns them. Places the
* cursor to where the tqchildren have been.
*
* We remove ourselve if we are requested to remove our content.
*/
void RootElement::remove(FormulaCursor* cursor,
TQPtrList<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 tqchildren 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(TQDomElement element)
{
BasicElement::writeDom(element);
TQDomDocument doc = element.ownerDocument();
TQDomElement con = doc.createElement("CONTENT");
con.appendChild(content->getElementDom(doc));
element.appendChild(con);
if(hasIndex()) {
TQDomElement 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(TQDomElement 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(TQDomNode& 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 TQDomElement& 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(TQDomNode& 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;
}
TQString RootElement::toLatex()
{
TQString root;
root="\\sqrt";
if(hasIndex()) {
root+="[";
root+=index->toLatex();
root+="]";
}
root+="{";
root+=content->toLatex();
root+="}";
return root;
}
TQString RootElement::formulaString()
{
if ( hasIndex() ) {
return "(" + content->formulaString() + ")**(1.0/(" + index->formulaString() + "))";
}
return "sqrt(" + content->formulaString() + ")";
}
void RootElement::writeMathMLContent( TQDomDocument& doc, TQDomElement& element, bool oasisFormat ) const
{
content->writeMathML( doc, element, oasisFormat );
if( hasIndex() )
{
index->writeMathML( doc, element, oasisFormat );
}
}
KFORMULA_NAMESPACE_END