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/* This file is part of the KDE project
Copyright (C) 2006 Alfredo Beaumont Sainz <alfredo.beaumont@gmail.com>
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 <qfontmetrics.h>
#include <qpainter.h>
#include "fontstyle.h"
#include "glyphelement.h"
KFORMULA_NAMESPACE_BEGIN
GlyphElement::GlyphElement( BasicElement* parent ) : TextElement( ' ', false, parent ) {
}
bool GlyphElement::readAttributesFromMathMLDom( const QDomElement& element )
{
if ( !BasicElement::readAttributesFromMathMLDom( element ) ) {
return false;
}
// MathML Section 3.2.9.2
m_fontFamily = element.attribute( "fontfamily" );
if ( m_fontFamily.isNull() ) {
kdWarning( DEBUGID ) << "Required attribute fontfamily not found in glyph element\n";
return false;
}
QString indexStr = element.attribute( "index" );
if ( indexStr.isNull() ) {
kdWarning( DEBUGID ) << "Required attribute index not found in glyph element\n";
return false;
}
bool ok;
ushort index = indexStr.toUShort( &ok );
if ( ! ok ) {
kdWarning( DEBUGID ) << "Invalid index value in glyph element\n";
return false;
}
m_char = QChar( index );
m_alt = element.attribute( "alt" );
if ( m_alt.isNull() ) {
kdWarning( DEBUGID ) << "Required attribute alt not found in glyph element\n";
return false;
}
QStringList missing;
FontStyle::testFont( missing, m_fontFamily.lower() );
m_hasFont = missing.isEmpty();
return true;
}
/**
* Calculates our width and height and
* our children's parentPosition.
*/
void GlyphElement::calcSizes( const ContextStyle& context,
ContextStyle::TextStyle tstyle,
ContextStyle::IndexStyle /*istyle*/,
StyleAttributes& style )
{
double factor = style.sizeFactor();
luPt mySize = context.getAdjustedSize( tstyle, factor );
QRect bound;
if ( m_hasFont ) {
QFont font( m_fontFamily );
font.setPointSizeFloat( context.layoutUnitPtToPt( mySize ) );
QFontMetrics fm ( font );
bound = fm.boundingRect( m_char );
setWidth( context.ptToLayoutUnitPt( fm.width( m_char ) ) );
}
else {
QFont font( context.getDefaultFont() );
font.setPointSizeFloat( context.layoutUnitPtToPt( mySize ) );
QFontMetrics fm ( font );
bound = fm.boundingRect( m_alt );
setWidth( context.ptToLayoutUnitPt( fm.width( m_alt ) ) );
}
setHeight( context.ptToLayoutUnitPt( bound.height() ) );
setBaseline( context.ptToLayoutUnitPt( -bound.top() ) );
// There are some glyphs in TeX that have
// baseline==0. (\int, \sum, \prod)
if ( getBaseline() == 0 ) {
setBaseline( -1 );
}
}
/**
* 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 GlyphElement::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;
double factor = style.sizeFactor();
luPt mySize = context.getAdjustedSize( tstyle, factor );
QFont font;
QString text;
if ( m_hasFont ) {
painter.setPen( style.color() );
setCharStyle( style.charStyle() );
setCharFamily( style.charFamily() );
font = QFont( m_fontFamily );
text = m_char;
painter.fillRect( context.layoutUnitToPixelX( myPos.x() ),
context.layoutUnitToPixelY( myPos.y() ),
context.layoutUnitToPixelX( getWidth() ),
context.layoutUnitToPixelY( getHeight() ),
style.background() );
}
else {
painter.setPen( context.getErrorColor() );
font = context.getDefaultFont();
text = m_alt;
}
font.setPointSizeFloat( context.layoutUnitToFontSize( mySize, false ) );
painter.setFont( font );
painter.drawText( context.layoutUnitToPixelX( myPos.x() ),
context.layoutUnitToPixelY( myPos.y()+getBaseline() ),
text );
}
void GlyphElement::writeMathMLAttributes( QDomElement& element ) const
{
element.setAttribute( "fontfamily", m_fontFamily );
element.setAttribute( "index", m_char.unicode() );
element.setAttribute( "alt", m_alt );
}
KFORMULA_NAMESPACE_END
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