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koffice/lib/kformula/paddedelement.cc

297 lines
10 KiB

/* 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 "elementtype.h"
#include "paddedelement.h"
KFORMULA_NAMESPACE_BEGIN
PaddedElement::PaddedElement( BasicElement* parent ) : SequenceElement( parent ),
m_widthType( NoSize ),
m_lspaceType( NoSize ),
m_heightType( NoSize ),
m_depthType( NoSize ),
m_widthRelative( false ),
m_lspaceRelative( false ),
m_heightRelative( false ),
m_depthRelative( false )
{
}
/**
* Calculates our width and height and
* our children's parentPosition.
*/
void PaddedElement::calcSizes( const ContextStyle& context,
ContextStyle::TextStyle tstyle,
ContextStyle::IndexStyle istyle,
StyleAttributes& style )
{
double factor = style.sizeFactor();
luPixel width = 0;
luPixel height = 0;
luPixel depth = 0;
if ( !isEmpty() ) {
// First, get content height and width
for ( iterator it = begin(); it != end(); ++it ) {
luPixel spaceBefore = 0;
if ( it == begin() ) {
spaceBefore = context.ptToPixelX( getSpaceBefore( context, tstyle, factor ) );
}
it->calcSizes( context, tstyle, istyle, style );
width += it->getWidth() + spaceBefore;
luPixel baseline = it->getBaseline();
if ( baseline > -1 ) {
height = TQMAX( height, baseline );
depth = TQMAX( depth, it->getHeight() - baseline );
}
else {
luPixel bl = it->getHeight()/2 + context.axisHeight( tstyle, factor );
height = TQMAX( height, bl );
depth = TQMAX( depth, it->getHeight() - bl );
}
}
}
else {
width = context.getEmptyRectWidth( factor );
height = context.getEmptyRectHeight( factor );
depth = 0;
}
luPixel left = calcSize( context, m_lspaceType, m_lspaceRelative, m_lspace, width, height, 0 );
luPixel right = calcSize( context, m_widthType, m_widthRelative, m_width, width, height, width ) + left;
luPixel down = calcSize( context, m_depthType, m_depthRelative, m_depth, width, height, depth );
luPixel up = calcSize( context, m_heightType, m_heightRelative, m_height, width, height, height );
// Check borders
if ( right < 0 ) right = 0;
if ( up + down < 0 ) up = down = 0;
if ( ! isEmpty() ) {
width = left;
// Let's do all normal elements that have a base line.
for ( iterator it = begin(); it != end(); ++it ) {
luPixel spaceBefore = 0;
if ( it == begin() ) {
spaceBefore = context.ptToPixelX( getSpaceBefore( context, tstyle, factor ) );
}
it->calcSizes( context, tstyle, istyle, style );
it->setX( width + spaceBefore );
width += it->getWidth() + spaceBefore;
}
setWidth( right );
setHeight( up + down );
setBaseline( up );
setChildrenPositions();
}
else {
setWidth( right );
setHeight( up + down );
setBaseline( up );
}
}
bool PaddedElement::readAttributesFromMathMLDom(const TQDomElement& element)
{
if ( ! BasicElement::readAttributesFromMathMLDom( element ) ) {
return false;
}
TQString widthStr = element.attribute( "width" ).stripWhiteSpace().lower();
if ( ! widthStr.isNull() ) {
m_width = readSizeAttribute( widthStr, &m_widthType, &m_widthRelative );
}
TQString lspaceStr = element.attribute( "lspace" ).stripWhiteSpace().lower();
if ( ! lspaceStr.isNull() ) {
m_lspace = readSizeAttribute( lspaceStr, &m_lspaceType, &m_lspaceRelative );
}
TQString heightStr = element.attribute( "height" ).stripWhiteSpace().lower();
if ( ! heightStr.isNull() ) {
m_height = readSizeAttribute( heightStr, &m_heightType, &m_heightRelative );
}
TQString depthStr = element.attribute( "depth" ).stripWhiteSpace().lower();
if ( ! depthStr.isNull() ) {
m_depth = readSizeAttribute( depthStr, &m_depthType, &m_depthRelative );
}
return true;
}
void PaddedElement::writeMathMLAttributes( TQDomElement& element ) const
{
writeSizeAttribute( element, "width", m_widthType, m_width, m_widthRelative );
writeSizeAttribute( element, "lspace", m_lspaceType, m_lspace, m_lspaceRelative );
writeSizeAttribute( element, "height", m_heightType, m_height, m_heightRelative );
writeSizeAttribute( element, "depth", m_depthType, m_depth, m_depthRelative );
}
double PaddedElement::readSizeAttribute( const TQString& str, SizeType* st, bool* relative )
{
if ( st == 0 ){
return -1;
}
if ( str[0] == '+' || str[0] == '-' ) {
*relative = true;
}
int index = str.find( "width" );
if ( index != -1 ) {
int index2 = str.find( "%" );
if ( index2 != -1 ) {
return str2size( str.left( index2 ).stripWhiteSpace(), st, WidthRelativeSize ) / 100.0;
}
return str2size( str.left( index ).stripWhiteSpace(), st, WidthRelativeSize );
}
index = str.find( "height" );
if ( index != -1 ) {
int index2 = str.find( "%" );
if ( index2 != -1 ) {
return str2size( str.left( index2 ).stripWhiteSpace(), st, HeightRelativeSize ) / 100.0;
}
return str2size( str.left( index ).stripWhiteSpace(), st, HeightRelativeSize );
}
index = str.find( "%" );
if ( index != -1 ) {
return str2size( str.left( index ).stripWhiteSpace(), st, RelativeSize ) / 100.0;
}
index = str.find( "pt", 0, false );
if ( index != -1 ) {
return str2size( str.left( index ).stripWhiteSpace(), st, AbsoluteSize );
}
index = str.find( "mm", 0, false );
if ( index != -1 ) {
return str2size( str.left( index ).stripWhiteSpace(), st, AbsoluteSize ) * 72.0 / 20.54;
}
index = str.find( "cm", 0, false );
if ( index != -1 ) {
return str2size( str.left( index ).stripWhiteSpace(), st, AbsoluteSize ) * 72.0 / 2.54;
}
index = str.find( "in", 0, false );
if ( index != -1 ) {
return str2size( str.left( index ).stripWhiteSpace(), st, AbsoluteSize ) * 72.0;
}
index = str.find( "em", 0, false );
if ( index != -1 ) {
return str2size( str.left( index ).stripWhiteSpace(), st, RelativeSize );
}
index = str.find( "ex", 0, false );
if ( index != -1 ) {
return str2size( str.left( index ).stripWhiteSpace(), st, RelativeSize );
}
index = str.find( "pc", 0, false );
if ( index != -1 ) {
return str2size( str.left( index ).stripWhiteSpace(), st, AbsoluteSize ) * 12.0;
}
index = str.find( "px", 0, false );
if ( index != -1 ) {
return str2size( str.left( index ).stripWhiteSpace(), st, PixelSize );
}
// If there's no unit, assume 'pt'
return str2size( str, st, AbsoluteSize );
}
double PaddedElement::str2size( const TQString& str, SizeType *st, SizeType type )
{
bool ok;
double size = str.toDouble( &ok );
if ( ok ) {
if ( st ) {
*st = type;
}
return size;
}
if ( st ) {
*st = NoSize;
}
return -1;
}
void PaddedElement::writeSizeAttribute( TQDomElement element, const TQString& str,
SizeType st, bool relative, double s ) const
{
TQString prefix;
if ( relative ) {
s < 0 ? prefix = "-" : prefix = "+" ;
}
switch ( st ) {
case WidthRelativeSize:
element.setAttribute( str, prefix + TQString( "%1 width" ).arg( s ) );
break;
case HeightRelativeSize:
element.setAttribute( str, prefix + TQString( "%1 height" ).arg( s ) );
case AbsoluteSize:
element.setAttribute( str, prefix + TQString( "%1pt" ).arg( s ) );
break;
case RelativeSize:
element.setAttribute( str, prefix + TQString( "%1%" ).arg( s * 100.0 ) );
break;
case PixelSize:
element.setAttribute( str, prefix + TQString( "%1px" ).arg( s ) );
break;
default:
break;
}
}
luPixel PaddedElement::calcSize( const ContextStyle& context, SizeType type,
bool relative, double length, luPixel width,
luPixel height, luPixel defvalue )
{
luPixel value = defvalue;
switch ( type ) {
case AbsoluteSize:
if ( relative )
value += context.ptToLayoutUnitPt ( length );
else
value = context.ptToLayoutUnitPt( length );
break;
case RelativeSize:
if ( relative )
value += length * value;
else
value *= length;
break;
case WidthRelativeSize:
if ( relative )
value += length * width;
else
value = length * width;
break;
case HeightRelativeSize:
if ( relative )
value += length * height;
else
value = length * height;
break;
case PixelSize:
if ( relative )
value += context.pixelToLayoutUnitX( length );
else
value = context.pixelToLayoutUnitX( length );
break;
default:
break;
}
return value;
}
KFORMULA_NAMESPACE_END