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00021 #include <iostream>
00022 #include <qpainter.h>
00023
00024 #include <kdebug.h>
00025
00026 #include "contextstyle.h"
00027 #include "formulacursor.h"
00028 #include "formulaelement.h"
00029 #include "kformulacontainer.h"
00030 #include "kformuladocument.h"
00031
00032 KFORMULA_NAMESPACE_BEGIN
00033
00034 FormulaElement::FormulaElement(FormulaDocument* container)
00035 : document( container ), baseSize( 20 ), ownBaseSize( false )
00036 {
00037 }
00038
00039
00040 void FormulaElement::setBaseSize( int size )
00041 {
00042 if ( size > 0 ) {
00043 baseSize = size;
00044 ownBaseSize = true;
00045 }
00046 else {
00047 ownBaseSize = false;
00048 }
00049 document->baseSizeChanged( size, ownBaseSize );
00050 }
00051
00052
00056 BasicElement* FormulaElement::goToPos( FormulaCursor* cursor, const LuPixelPoint& point )
00057 {
00058 bool handled = false;
00059 BasicElement* element = inherited::goToPos(cursor, handled, point, LuPixelPoint());
00060 if (element == 0) {
00061
00062 cursor->setTo(this, countChildren());
00063
00064 return this;
00065 }
00066 return element;
00067 }
00068
00069 void FormulaElement::elementRemoval(BasicElement* child)
00070 {
00071 document->elementRemoval(child);
00072 }
00073
00074 void FormulaElement::changed()
00075 {
00076 document->changed();
00077 }
00078
00079 void FormulaElement::cursorHasMoved( FormulaCursor* cursor )
00080 {
00081 document->cursorHasMoved( cursor );
00082 }
00083
00084 void FormulaElement::moveOutLeft( FormulaCursor* cursor )
00085 {
00086 document->moveOutLeft( cursor );
00087 }
00088
00089 void FormulaElement::moveOutRight( FormulaCursor* cursor )
00090 {
00091 document->moveOutRight( cursor );
00092 }
00093
00094 void FormulaElement::moveOutBelow( FormulaCursor* cursor )
00095 {
00096 document->moveOutBelow( cursor );
00097 }
00098
00099 void FormulaElement::moveOutAbove( FormulaCursor* cursor )
00100 {
00101 document->moveOutAbove( cursor );
00102 }
00103
00104 void FormulaElement::tell( const QString& msg )
00105 {
00106 document->tell( msg );
00107 }
00108
00109 void FormulaElement::removeFormula( FormulaCursor* cursor )
00110 {
00111 document->removeFormula( cursor );
00112 }
00113
00114 void FormulaElement::insertFormula( FormulaCursor* cursor )
00115 {
00116 document->insertFormula( cursor );
00117 }
00118
00119 void FormulaElement::calcSizes( const ContextStyle& context,
00120 ContextStyle::TextStyle tstyle,
00121 ContextStyle::IndexStyle istyle,
00122 StyleAttributes& style )
00123 {
00124 inherited::calcSizes( context, tstyle, istyle, style );
00125 }
00126
00127
00128 void FormulaElement::draw( QPainter& painter, const LuPixelRect& r,
00129 const ContextStyle& context,
00130 ContextStyle::TextStyle tstyle,
00131 ContextStyle::IndexStyle istyle,
00132 StyleAttributes& style,
00133 const LuPixelPoint& parentOrigin )
00134 {
00135 inherited::draw( painter, r, context, tstyle, istyle, style, parentOrigin );
00136 }
00137
00138
00142 void FormulaElement::calcSizes( ContextStyle& context )
00143 {
00144
00145 if ( ownBaseSize ) {
00146 context.setSizeFactor( static_cast<double>( getBaseSize() )/context.baseSize() );
00147 }
00148 else {
00149 context.setSizeFactor( 1 );
00150 }
00151 StyleAttributes style;
00152 calcSizes( context, context.getBaseTextStyle(), ContextStyle::normal, style );
00153 }
00154
00158 void FormulaElement::draw( QPainter& painter, const LuPixelRect& r,
00159 ContextStyle& context )
00160 {
00161
00162 if ( ownBaseSize ) {
00163 context.setSizeFactor( static_cast<double>( getBaseSize() )/context.baseSize() );
00164 }
00165 else {
00166 context.setSizeFactor( 1 );
00167 }
00168 StyleAttributes style;
00169 draw( painter, r, context, context.getBaseTextStyle(),
00170 ContextStyle::normal, style, LuPixelPoint() );
00171 }
00172
00173 KCommand* FormulaElement::buildCommand( Container* container, Request* request )
00174 {
00175 switch ( *request ) {
00176 case req_compactExpression:
00177 return 0;
00178 default:
00179 break;
00180 }
00181 return inherited::buildCommand( container, request );
00182 }
00183
00184 const SymbolTable& FormulaElement::getSymbolTable() const
00185 {
00186 return document->getSymbolTable();
00187 }
00188
00189
00190 QDomElement FormulaElement::emptyFormulaElement( QDomDocument& doc )
00191 {
00192 QDomElement element = doc.createElement( getTagName() );
00193
00194
00195
00196
00197
00198
00199 return element;
00200 }
00201
00202 KCommand* FormulaElement::input( Container* container, QKeyEvent* event )
00203 {
00204 QChar ch = event->text().at( 0 );
00205 if ( !ch.isPrint() ) {
00206 int action = event->key();
00207
00208
00209
00210 switch ( action ) {
00211 case Qt::Key_Return:
00212 case Qt::Key_Enter: {
00213 FormulaCursor* cursor = container->activeCursor();
00214 insertFormula( cursor );
00215 return 0;
00216 }
00217 }
00218 }
00219 return inherited::input( container, event );
00220 }
00221
00225 void FormulaElement::writeDom(QDomElement element)
00226 {
00227 inherited::writeDom(element);
00228 element.setAttribute( "VERSION", "6" );
00229 if ( ownBaseSize ) {
00230 element.setAttribute( "BASESIZE", baseSize );
00231 }
00232 }
00233
00238 bool FormulaElement::readAttributesFromDom(QDomElement element)
00239 {
00240 if (!inherited::readAttributesFromDom(element)) {
00241 return false;
00242 }
00243 int version = -1;
00244 QString versionStr = element.attribute( "VERSION" );
00245 if ( !versionStr.isNull() ) {
00246 version = versionStr.toInt();
00247 }
00248 if ( version > -1 ) {
00249
00250
00251 if ( version < 4 ) {
00252 convertNames( element );
00253 }
00254 }
00255 QString baseSizeStr = element.attribute( "BASESIZE" );
00256 if ( !baseSizeStr.isNull() ) {
00257 ownBaseSize = true;
00258 baseSize = baseSizeStr.toInt();
00259 }
00260 else {
00261 ownBaseSize = false;
00262 }
00263 return true;
00264 }
00265
00271 bool FormulaElement::readContentFromDom(QDomNode& node)
00272 {
00273 return inherited::readContentFromDom(node);
00274 }
00275
00276 void FormulaElement::convertNames( QDomNode node )
00277 {
00278 if ( node.isElement() && ( node.nodeName().upper() == "TEXT" ) ) {
00279 QDomNamedNodeMap attr = node.attributes();
00280 QDomAttr ch = attr.namedItem( "CHAR" ).toAttr();
00281 if ( ch.value() == "\\" ) {
00282 QDomNode sequence = node.parentNode();
00283 QDomDocument doc = sequence.ownerDocument();
00284 QDomElement nameseq = doc.createElement( "NAMESEQUENCE" );
00285 sequence.replaceChild( nameseq, node );
00286
00287 bool inName = true;
00288 while ( inName ) {
00289 inName = false;
00290 QDomNode n = nameseq.nextSibling();
00291 if ( n.isElement() && ( n.nodeName().upper() == "TEXT" ) ) {
00292 attr = n.attributes();
00293 ch = attr.namedItem( "CHAR" ).toAttr();
00294 if ( ch.value().at( 0 ).isLetter() ) {
00295 nameseq.appendChild( sequence.removeChild( n ) );
00296 inName = true;
00297 }
00298 }
00299 }
00300 }
00301 }
00302 if ( node.hasChildNodes() ) {
00303 QDomNode n = node.firstChild();
00304 while ( !n.isNull() ) {
00305 convertNames( n );
00306 n = n.nextSibling();
00307 }
00308 }
00309 }
00310
00311 QString FormulaElement::toLatex()
00312 {
00313 return inherited::toLatex();
00314 }
00315
00316 void FormulaElement::writeMathML( QDomDocument& doc, QDomNode& parent, bool oasisFormat ) const
00317 {
00318 QDomElement de;
00319 if ( !oasisFormat ) {
00320 de = doc.createElementNS( "http://www.w3.org/1998/Math/MathML",
00321 "math" );
00322 parent.appendChild( de );
00323 }
00324 else {
00325 QDomElement element = doc.createElement( "math:semantics" );
00326 de = doc.createElement( "math:mrow" );
00327 parent.appendChild( element );
00328 element.appendChild( de );
00329 }
00330 for ( uint i = 0; i < countChildren(); ++i ) {
00331 const BasicElement* e = getChild( i );
00332 e->writeMathML( doc, de, oasisFormat );
00333 }
00334 }
00335
00336 KFORMULA_NAMESPACE_END