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tdegraphics/ksvg/impl/SVGLengthImpl.cc

511 lines
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/*
Copyright (C) 2001-2003 KSVG Team
This file is part of the KDE project
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 <kdebug.h>
#include <tqfont.h>
#include <tqregexp.h>
#include <tqwidget.h>
#include <tqpaintdevicemetrics.h>
#include "SVGLength.h"
#include "SVGRectImpl.h"
#include "SVGLengthImpl.h"
#include "SVGMatrixImpl.h"
#include "SVGHelperImpl.h"
#include "SVGDocumentImpl.h"
#include "SVGStringListImpl.h"
#include "SVGSVGElementImpl.h"
#include "SVGAnimatedLengthImpl.h"
#include "SVGAnimatedRectImpl.h"
#include "svgpathparser.h"
#include "KSVGCanvas.h"
using namespace KSVG;
#include "SVGLengthImpl.lut.h"
#include "ksvg_scriptinterpreter.h"
#include "ksvg_bridge.h"
#include "ksvg_cacheimpl.h"
// keep track of textual description of the unit type
TQString UnitText[] =
{
"", "", "%", "em", "ex", "px", "cm", "mm", "in", "pt", "pc"
};
SVGLengthImpl::SVGLengthImpl(LengthMode mode, SVGElementImpl *context) : DOM::DomShared(), m_mode(mode), m_context(context)
{
KSVG_EMPTY_FLAGS
m_unitType = SVG_LENGTHTYPE_UNKNOWN;
m_value = 0;
m_valueInSpecifiedUnits = 0;
m_bboxContext = 0;
}
SVGLengthImpl::SVGLengthImpl(const SVGLengthImpl &other) : DOM::DomShared()
{
(*this) = other;
}
SVGLengthImpl::~SVGLengthImpl()
{
}
double SVGLengthImpl::dpi()
{
if(m_context && m_context->ownerDoc())
{
if(m_mode == LENGTHMODE_WIDTH)
return 25.4 * m_context->ownerDoc()->screenPixelsPerMillimeterX();
else if(m_mode == LENGTHMODE_HEIGHT)
return 25.4 * m_context->ownerDoc()->screenPixelsPerMillimeterY();
else if(m_mode == LENGTHMODE_OTHER)
return 25.4 * m_context->ownerDoc()->screenPixelsPerMillimeterX();
}
return 90.0;
}
SVGLengthImpl &SVGLengthImpl::operator=(const SVGLengthImpl &other)
{
m_unitType = other.m_unitType;
m_value = other.m_value;
m_valueInSpecifiedUnits = other.m_valueInSpecifiedUnits;
m_bboxContext = other.m_bboxContext;
m_mode = other.m_mode;
m_context = other.m_context;
return *this;
}
unsigned short SVGLengthImpl::unitType() const
{
return m_unitType;
}
void SVGLengthImpl::setValue(float value)
{
m_value = value;
getValFromPx();
}
float SVGLengthImpl::value()
{
if(m_unitType == SVG_LENGTHTYPE_PERCENTAGE)
{
float value = m_valueInSpecifiedUnits / 100.0;
SVGRectImpl *bbox = 0;
if(m_bboxContext && (bbox = m_bboxContext->getBBox()))
{
float result = 0;
if(m_mode == LENGTHMODE_WIDTH)
result = value * bbox->width();
else if(m_mode == LENGTHMODE_HEIGHT)
result = value * bbox->height();
else if(m_mode == LENGTHMODE_OTHER)
result = value * sqrt(pow(bbox->width(), 2) + pow(bbox->height(), 2)) / sqrt(2.0);
bbox->deref();
return result;
}
else
return percentageOfViewport();
}
else
return m_value;
}
void SVGLengthImpl::setValueInSpecifiedUnits(float valueInSpecifiedUnits)
{
m_valueInSpecifiedUnits = valueInSpecifiedUnits;
convertNumToPx();
}
float SVGLengthImpl::valueInSpecifiedUnits() const
{
return m_valueInSpecifiedUnits;
}
void SVGLengthImpl::setValueAsString(const DOM::DOMString &valueAsString)
{
convertStringToPx(valueAsString.string());
}
DOM::DOMString SVGLengthImpl::valueAsString() const
{
DOM::DOMString valueAsString = TQString::number(m_valueInSpecifiedUnits);
valueAsString += UnitText[m_unitType];
return valueAsString;
}
void SVGLengthImpl::newValueSpecifiedUnits(unsigned short unitType, float valueInSpecifiedUnits)
{
m_valueInSpecifiedUnits = valueInSpecifiedUnits;
m_unitType = unitType;
convertNumToPx();
}
void SVGLengthImpl::convertToSpecifiedUnits(unsigned short unitType)
{
m_unitType = unitType;
getValFromPx();
}
SVGLengthImpl::operator float()
{
return valueInSpecifiedUnits();
}
bool SVGLengthImpl::getValFromPx()
{
if(m_unitType == SVG_LENGTHTYPE_UNKNOWN)
return false;
switch(m_unitType)
{
// case SVG_LENGTHTYPE_PERCENTAGE: TODO
// case SVG_LENGTHTYPE_EMS: TODO
// case SVG_LENGTHTYPE_EXS: TODO
//break;
case SVG_LENGTHTYPE_PX:
m_valueInSpecifiedUnits = m_value;
break;
case SVG_LENGTHTYPE_CM:
m_valueInSpecifiedUnits = m_value / dpi() * 2.54;
break;
case SVG_LENGTHTYPE_MM:
m_valueInSpecifiedUnits = m_value / dpi() * 25.4;
break;
case SVG_LENGTHTYPE_IN:
m_valueInSpecifiedUnits = m_value / dpi();
break;
case SVG_LENGTHTYPE_PT:
m_valueInSpecifiedUnits = m_value / dpi() * 72.0;
break;
case SVG_LENGTHTYPE_PC:
m_valueInSpecifiedUnits = m_value / dpi() * 6.0;
break;
};
return true;
}
void SVGLengthImpl::convertStringToPx(TQString s)
{
if(s.isEmpty())
return;
double convNum = 0;
const char *start = s.latin1();
const char *end = getNumber(start, convNum);
m_valueInSpecifiedUnits = convNum;
if(uint(end - start) < s.length())
{
if(s.endsWith(UnitText[SVG_LENGTHTYPE_PX]))
m_unitType = SVG_LENGTHTYPE_PX;
else if(s.endsWith(UnitText[SVG_LENGTHTYPE_CM]))
m_unitType = SVG_LENGTHTYPE_CM;
else if(s.endsWith(UnitText[SVG_LENGTHTYPE_PC]))
m_unitType = SVG_LENGTHTYPE_PC;
else if(s.endsWith(UnitText[SVG_LENGTHTYPE_MM]))
m_unitType = SVG_LENGTHTYPE_MM;
else if(s.endsWith(UnitText[SVG_LENGTHTYPE_IN]))
m_unitType = SVG_LENGTHTYPE_IN;
else if(s.endsWith(UnitText[SVG_LENGTHTYPE_PT]))
m_unitType = SVG_LENGTHTYPE_PT;
else if(s.endsWith(UnitText[SVG_LENGTHTYPE_PERCENTAGE]))
m_unitType = SVG_LENGTHTYPE_PERCENTAGE;
else if(s.endsWith(UnitText[SVG_LENGTHTYPE_EMS]))
m_unitType = SVG_LENGTHTYPE_EMS;
else if(s.endsWith(UnitText[SVG_LENGTHTYPE_EXS]))
m_unitType = SVG_LENGTHTYPE_EXS;
else if(s.isEmpty())
m_unitType = SVG_LENGTHTYPE_NUMBER;
else
m_unitType = SVG_LENGTHTYPE_UNKNOWN;
}
else
m_unitType = SVG_LENGTHTYPE_PX;
convertNumToPx();
}
void SVGLengthImpl::convertNumToPx()
{
switch(m_unitType)
{
case SVG_LENGTHTYPE_PX:
m_value = m_valueInSpecifiedUnits;
break;
case SVG_LENGTHTYPE_CM:
m_value = (m_valueInSpecifiedUnits / 2.54) * dpi();
break;
case SVG_LENGTHTYPE_MM:
m_value = (m_valueInSpecifiedUnits / 25.4) * dpi();
break;
case SVG_LENGTHTYPE_IN:
m_value = m_valueInSpecifiedUnits * dpi();
break;
case SVG_LENGTHTYPE_PT:
m_value = (m_valueInSpecifiedUnits / 72.0) * dpi();
break;
case SVG_LENGTHTYPE_PC:
m_value = (m_valueInSpecifiedUnits / 6.0) * dpi();
break;
case SVG_LENGTHTYPE_EMS: // Be careful here, always recheck coords-units-BE-01.svg after touching (Niko)
case SVG_LENGTHTYPE_EXS:
if(m_context)
{
SVGStylableImpl *style = dynamic_cast<SVGStylableImpl *>(m_context);
if(!style)
break;
bool sizeLocal = (style->getFontSize() != -1);
bool familyLocal = (style->getFontFamily() && style->getFontFamily()->getFirst());
SVGStylableImpl *parentStyle = 0;
if((!sizeLocal || !familyLocal) && m_context)
parentStyle = dynamic_cast<SVGStylableImpl *>(m_context->ownerDoc()->getElementFromHandle(m_context->parentNode().handle()));
// Look up font-size in a SAFE way, because at this place
// processStyle() has NOT yet been called, so we need
// a different solution (Niko)
TQString useFont = "Arial";
double useSize = 12;
if(sizeLocal)
useSize = style->getFontSize();
else if(parentStyle && parentStyle->getFontSize() != -1)
useSize = parentStyle->getFontSize();
if(familyLocal)
useFont = style->getFontFamily()->getFirst()->string();
else if(parentStyle && parentStyle->getFontFamily() && parentStyle->getFontFamily()->getFirst())
useFont = parentStyle->getFontFamily()->getFirst()->string();
if(m_unitType == SVG_LENGTHTYPE_EMS)
m_value = m_valueInSpecifiedUnits * useSize;
else
{
// Easiest way, use qfont (Niko)
TQFont font(useFont);
font.setPixelSize(static_cast<int>(useSize));
TQFontMetrics fm(font);
m_value = m_valueInSpecifiedUnits * fm.boundingRect('x').height();
}
}
break;
};
}
void SVGLengthImpl::convertPercentageToFloat(const TQString &perc, float &result)
{
// TODO : more error checking ?
if(perc.endsWith("%"))
result = perc.left(perc.length() - 1).toFloat() / 100.0;
else
result = perc.toFloat();
}
TQString SVGLengthImpl::convertValToPercentage(const TQString &val, float benchmark)
{
if(val.endsWith("%"))
return val;
TQString result;
float temp = val.toFloat();
temp = (temp / benchmark) * 100.0;
result.setNum(temp);
result.append("%");
return result;
}
SVGElementImpl *SVGLengthImpl::context() const
{
return m_context;
}
void SVGLengthImpl::setContext(SVGElementImpl *context)
{
m_context = context;
}
void SVGLengthImpl::setBBoxContext(SVGShapeImpl *bbox)
{
m_bboxContext = bbox;
convertNumToPx();
}
float SVGLengthImpl::percentageOfViewport()
{
float width = 0, height = 0;
float value = m_valueInSpecifiedUnits / 100.0;
if(m_context->viewportElement())
{
SVGSVGElementImpl *svg = dynamic_cast<SVGSVGElementImpl *>(m_context->viewportElement());
if(svg)
{
// Calculate against viewBox, otherwise svg width/height
width = svg->viewBox()->baseVal()->width();
if(width == 0)
width = svg->width()->baseVal()->value();
height = svg->viewBox()->baseVal()->height();
if(height == 0)
height = svg->height()->baseVal()->value();
}
if(m_mode == LENGTHMODE_WIDTH)
return value * width;
else if(m_mode == LENGTHMODE_HEIGHT)
return value * height;
else if(m_mode == LENGTHMODE_OTHER)
return value * sqrt(pow(width, 2) + pow(height, 2)) / sqrt(2.0);
}
else if(m_context == m_context->ownerDoc()->rootElement())
{
if(!m_context->ownerDoc()->canvas()) // Happens when parsing <svg width="100%"> with printnodetest
return 0.0;
TQPaintDeviceMetrics metrics(m_context->ownerDoc()->canvas()->drawWindow());
if(m_mode == LENGTHMODE_WIDTH)
return value * metrics.width();
else if(m_mode == LENGTHMODE_HEIGHT)
return value * metrics.height();
else if(m_mode == LENGTHMODE_OTHER)
return value * sqrt(pow(metrics.width(), 2) + pow(metrics.height(), 2)) / sqrt(2.0);
}
return 0;
}
// Ecma stuff
//
/*
@namespace KSVG
@begin SVGLengthImpl::s_hashTable 5
unitType SVGLengthImpl::UnitType DontDelete|ReadOnly
value SVGLengthImpl::Value DontDelete
valueAsString SVGLengthImpl::ValueAsString DontDelete
valueInSpecifiedUnits SVGLengthImpl::ValueInSpecifiedUnits DontDelete
@end
@namespace KSVG
@begin SVGLengthImplProto::s_hashTable 3
newValueSpecifiedUnits SVGLengthImpl::NewValueSpecifiedUnits DontDelete|Function 2
convertToSpecifiedUnits SVGLengthImpl::ConvertToSpecifiedUnits DontDelete|Function 1
@end
*/
KSVG_IMPLEMENT_PROTOTYPE("SVGLength", SVGLengthImplProto, SVGLengthImplProtoFunc)
Value SVGLengthImpl::getValueProperty(ExecState *, int token) const
{
switch(token)
{
case UnitType:
return Number(unitType());
case Value:
return Number(m_value);
case ValueAsString:
return String(valueAsString().string());
case ValueInSpecifiedUnits:
return Number(valueInSpecifiedUnits());
default:
kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
return KJS::Undefined();
}
}
void SVGLengthImpl::putValueProperty(KJS::ExecState *exec, int token, const KJS::Value &value, int)
{
switch(token)
{
case Value:
setValue(value.toNumber(exec));
SVGHelperImpl::updateItem(exec, *m_context);
break;
case ValueAsString:
setValueAsString(value.toString(exec).string());
SVGHelperImpl::updateItem(exec, *m_context);
break;
case ValueInSpecifiedUnits:
setValueInSpecifiedUnits(value.toNumber(exec));
SVGHelperImpl::updateItem(exec, *m_context);
break;
default:
kdWarning() << "Unhandled token in " << k_funcinfo << " : " << token << endl;
}
}
Value SVGLengthImplProtoFunc::call(ExecState *exec, Object &thisObj, const List &args)
{
KSVG_CHECK_THIS(SVGLengthImpl)
switch(id)
{
case SVGLengthImpl::NewValueSpecifiedUnits:
obj->newValueSpecifiedUnits(static_cast<unsigned short>(args[0].toNumber(exec)), args[1].toNumber(exec));
SVGHelperImpl::updateItem(exec, *obj->context());
return Undefined();
case SVGLengthImpl::ConvertToSpecifiedUnits:
obj->convertToSpecifiedUnits(static_cast<unsigned short>(args[0].toNumber(exec)));
SVGHelperImpl::updateItem(exec, *obj->context());
return Undefined();
default:
kdWarning() << "Unhandled function id in " << k_funcinfo << " : " << id << endl;
break;
}
return Undefined();
}
/*
@namespace KSVG
@begin SVGLengthImplConstructor::s_hashTable 11
SVG_LENGTHTYPE_UNKNOWN KSVG::SVG_LENGTHTYPE_UNKNOWN DontDelete|ReadOnly
SVG_LENGTHTYPE_NUMBER KSVG::SVG_LENGTHTYPE_NUMBER DontDelete|ReadOnly
SVG_LENGTHTYPE_PERCENTAGE KSVG::SVG_LENGTHTYPE_PERCENTAGE DontDelete|ReadOnly
SVG_LENGTHTYPE_EMS KSVG::SVG_LENGTHTYPE_EMS DontDelete|ReadOnly
SVG_LENGTHTYPE_EXS KSVG::SVG_LENGTHTYPE_EXS DontDelete|ReadOnly
SVG_LENGTHTYPE_PX KSVG::SVG_LENGTHTYPE_PX DontDelete|ReadOnly
SVG_LENGTHTYPE_CM KSVG::SVG_LENGTHTYPE_CM DontDelete|ReadOnly
SVG_LENGTHTYPE_MM KSVG::SVG_LENGTHTYPE_MM DontDelete|ReadOnly
SVG_LENGTHTYPE_PT KSVG::SVG_LENGTHTYPE_PT DontDelete|ReadOnly
SVG_LENGTHTYPE_PC KSVG::SVG_LENGTHTYPE_PC DontDelete|ReadOnly
@end
*/
Value SVGLengthImplConstructor::getValueProperty(ExecState *, int token) const
{
return Number(token);
}
Value KSVG::getSVGLengthImplConstructor(ExecState *exec)
{
return cacheGlobalBridge<SVGLengthImplConstructor>(exec, "[[svglength.constructor]]");
}
// vim:ts=4:noet