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/*
Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
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 "config.h"
#if ENABLE(SVG)
#include "SVGPreserveAspectRatio.h"
#include "TransformationMatrix.h"
#include "SVGParserUtilities.h"
#include "SVGSVGElement.h"
namespace WebCore {
SVGPreserveAspectRatio::SVGPreserveAspectRatio()
: m_align(SVG_PRESERVEASPECTRATIO_XMIDYMID)
, m_meetOrSlice(SVG_MEETORSLICE_MEET)
{
// FIXME: Should the two values default to UNKNOWN instead?
}
SVGPreserveAspectRatio::~SVGPreserveAspectRatio()
{
}
void SVGPreserveAspectRatio::setAlign(unsigned short align)
{
m_align = align;
}
unsigned short SVGPreserveAspectRatio::align() const
{
return m_align;
}
void SVGPreserveAspectRatio::setMeetOrSlice(unsigned short meetOrSlice)
{
m_meetOrSlice = meetOrSlice;
}
unsigned short SVGPreserveAspectRatio::meetOrSlice() const
{
return m_meetOrSlice;
}
bool SVGPreserveAspectRatio::parsePreserveAspectRatio(const UChar*& currParam, const UChar* end, bool validate)
{
SVGPreserveAspectRatioType align = SVG_PRESERVEASPECTRATIO_NONE;
SVGMeetOrSliceType meetOrSlice = SVG_MEETORSLICE_MEET;
bool ret = false;
if (!skipOptionalSpaces(currParam, end))
goto bail_out;
if (*currParam == 'd') {
if (!skipString(currParam, end, "defer"))
goto bail_out;
// FIXME: We just ignore the "defer" here.
if (!skipOptionalSpaces(currParam, end))
goto bail_out;
}
if (*currParam == 'n') {
if (!skipString(currParam, end, "none"))
goto bail_out;
skipOptionalSpaces(currParam, end);
} else if (*currParam == 'x') {
if ((end - currParam) < 8)
goto bail_out;
if (currParam[1] != 'M' || currParam[4] != 'Y' || currParam[5] != 'M')
goto bail_out;
if (currParam[2] == 'i') {
if (currParam[3] == 'n') {
if (currParam[6] == 'i') {
if (currParam[7] == 'n')
align = SVG_PRESERVEASPECTRATIO_XMINYMIN;
else if (currParam[7] == 'd')
align = SVG_PRESERVEASPECTRATIO_XMINYMID;
else
goto bail_out;
} else if (currParam[6] == 'a' && currParam[7] == 'x')
align = SVG_PRESERVEASPECTRATIO_XMINYMAX;
else
goto bail_out;
} else if (currParam[3] == 'd') {
if (currParam[6] == 'i') {
if (currParam[7] == 'n')
align = SVG_PRESERVEASPECTRATIO_XMIDYMIN;
else if (currParam[7] == 'd')
align = SVG_PRESERVEASPECTRATIO_XMIDYMID;
else
goto bail_out;
} else if (currParam[6] == 'a' && currParam[7] == 'x')
align = SVG_PRESERVEASPECTRATIO_XMIDYMAX;
else
goto bail_out;
} else
goto bail_out;
} else if (currParam[2] == 'a' && currParam[3] == 'x') {
if (currParam[6] == 'i') {
if (currParam[7] == 'n')
align = SVG_PRESERVEASPECTRATIO_XMAXYMIN;
else if (currParam[7] == 'd')
align = SVG_PRESERVEASPECTRATIO_XMAXYMID;
else
goto bail_out;
} else if (currParam[6] == 'a' && currParam[7] == 'x')
align = SVG_PRESERVEASPECTRATIO_XMAXYMAX;
else
goto bail_out;
} else
goto bail_out;
currParam += 8;
skipOptionalSpaces(currParam, end);
} else
goto bail_out;
if (currParam < end) {
if (*currParam == 'm') {
if (!skipString(currParam, end, "meet"))
goto bail_out;
skipOptionalSpaces(currParam, end);
} else if (*currParam == 's') {
if (!skipString(currParam, end, "slice"))
goto bail_out;
skipOptionalSpaces(currParam, end);
if (align != SVG_PRESERVEASPECTRATIO_NONE)
meetOrSlice = SVG_MEETORSLICE_SLICE;
}
}
if (end != currParam && validate) {
bail_out:
// FIXME: Should the two values be set to UNKNOWN instead?
align = SVG_PRESERVEASPECTRATIO_NONE;
meetOrSlice = SVG_MEETORSLICE_MEET;
} else
ret = true;
if (m_align == align && m_meetOrSlice == meetOrSlice)
return ret;
m_align = align;
m_meetOrSlice = meetOrSlice;
return ret;
}
TransformationMatrix SVGPreserveAspectRatio::getCTM(double logicX, double logicY,
double logicWidth, double logicHeight,
double /*physX*/, double /*physY*/,
double physWidth, double physHeight)
{
TransformationMatrix temp;
if (align() == SVG_PRESERVEASPECTRATIO_UNKNOWN)
return temp;
double vpar = logicWidth / logicHeight;
double svgar = physWidth / physHeight;
if (align() == SVG_PRESERVEASPECTRATIO_NONE) {
temp.scaleNonUniform(physWidth / logicWidth, physHeight / logicHeight);
temp.translate(-logicX, -logicY);
} else if ((vpar < svgar && (meetOrSlice() == SVG_MEETORSLICE_MEET)) || (vpar >= svgar && (meetOrSlice() == SVG_MEETORSLICE_SLICE))) {
temp.scaleNonUniform(physHeight / logicHeight, physHeight / logicHeight);
if (align() == SVG_PRESERVEASPECTRATIO_XMINYMIN || align() == SVG_PRESERVEASPECTRATIO_XMINYMID || align() == SVG_PRESERVEASPECTRATIO_XMINYMAX)
temp.translate(-logicX, -logicY);
else if (align() == SVG_PRESERVEASPECTRATIO_XMIDYMIN || align() == SVG_PRESERVEASPECTRATIO_XMIDYMID || align() == SVG_PRESERVEASPECTRATIO_XMIDYMAX)
temp.translate(-logicX - (logicWidth - physWidth * logicHeight / physHeight) / 2, -logicY);
else
temp.translate(-logicX - (logicWidth - physWidth * logicHeight / physHeight), -logicY);
} else {
temp.scaleNonUniform(physWidth / logicWidth, physWidth / logicWidth);
if (align() == SVG_PRESERVEASPECTRATIO_XMINYMIN || align() == SVG_PRESERVEASPECTRATIO_XMIDYMIN || align() == SVG_PRESERVEASPECTRATIO_XMAXYMIN)
temp.translate(-logicX, -logicY);
else if (align() == SVG_PRESERVEASPECTRATIO_XMINYMID || align() == SVG_PRESERVEASPECTRATIO_XMIDYMID || align() == SVG_PRESERVEASPECTRATIO_XMAXYMID)
temp.translate(-logicX, -logicY - (logicHeight - physHeight * logicWidth / physWidth) / 2);
else
temp.translate(-logicX, -logicY - (logicHeight - physHeight * logicWidth / physWidth));
}
return temp;
}
String SVGPreserveAspectRatio::valueAsString() const
{
String result;
switch ((SVGPreserveAspectRatioType) align()) {
default:
case SVG_PRESERVEASPECTRATIO_NONE:
result = "none";
break;
case SVG_PRESERVEASPECTRATIO_XMINYMIN:
result = "xMinYMin";
break;
case SVG_PRESERVEASPECTRATIO_XMIDYMIN:
result = "xMidYMin";
break;
case SVG_PRESERVEASPECTRATIO_XMAXYMIN:
result = "xMaxYMin";
break;
case SVG_PRESERVEASPECTRATIO_XMINYMID:
result = "xMinYMid";
break;
case SVG_PRESERVEASPECTRATIO_XMIDYMID:
result = "xMidYMid";
break;
case SVG_PRESERVEASPECTRATIO_XMAXYMID:
result = "xMaxYMid";
break;
case SVG_PRESERVEASPECTRATIO_XMINYMAX:
result = "xMinYMax";
break;
case SVG_PRESERVEASPECTRATIO_XMIDYMAX:
result = "xMidYMax";
break;
case SVG_PRESERVEASPECTRATIO_XMAXYMAX:
result = "xMaxYMax";
break;
};
switch ((SVGMeetOrSliceType) meetOrSlice()) {
default:
case SVG_MEETORSLICE_UNKNOWN:
break;
case SVG_MEETORSLICE_MEET:
result += " meet";
break;
case SVG_MEETORSLICE_SLICE:
result += " slice";
break;
};
return result;
}
}
#endif // ENABLE(SVG)
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