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/*
Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
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 "config.h"
#if ENABLE(SVG)
#include "SVGFitToViewBox.h"
#include "TransformationMatrix.h"
#include "Document.h"
#include "FloatRect.h"
#include "SVGNames.h"
#include "SVGParserUtilities.h"
#include "SVGPreserveAspectRatio.h"
#include "StringImpl.h"
namespace WebCore {
char SVGFitToViewBoxIdentifier[] = "SVGFitToViewBox";
SVGFitToViewBox::SVGFitToViewBox()
: m_viewBox(this, SVGNames::viewBoxAttr)
, m_preserveAspectRatio(this, SVGNames::preserveAspectRatioAttr, SVGPreserveAspectRatio::create())
{
}
SVGFitToViewBox::~SVGFitToViewBox()
{
}
bool SVGFitToViewBox::parseViewBox(const UChar*& c, const UChar* end, float& x, float& y, float& w, float& h, bool validate)
{
Document* doc = contextElement()->document();
String str(c, end - c);
skipOptionalSpaces(c, end);
bool valid = (parseNumber(c, end, x) && parseNumber(c, end, y) &&
parseNumber(c, end, w) && parseNumber(c, end, h, false));
if (!validate)
return true;
if (!valid) {
doc->accessSVGExtensions()->reportWarning("Problem parsing viewBox=\"" + str + "\"");
return false;
}
if (w < 0.0) { // check that width is positive
doc->accessSVGExtensions()->reportError("A negative value for ViewBox width is not allowed");
return false;
} else if (h < 0.0) { // check that height is positive
doc->accessSVGExtensions()->reportError("A negative value for ViewBox height is not allowed");
return false;
} else {
skipOptionalSpaces(c, end);
if (c < end) { // nothing should come after the last, fourth number
doc->accessSVGExtensions()->reportWarning("Problem parsing viewBox=\"" + str + "\"");
return false;
}
}
return true;
}
TransformationMatrix SVGFitToViewBox::viewBoxToViewTransform(float viewWidth, float viewHeight) const
{
FloatRect viewBoxRect = viewBox();
if (!viewBoxRect.width() || !viewBoxRect.height())
return TransformationMatrix();
return preserveAspectRatio()->getCTM(viewBoxRect.x(),
viewBoxRect.y(), viewBoxRect.width(), viewBoxRect.height(),
0, 0, viewWidth, viewHeight);
}
bool SVGFitToViewBox::parseMappedAttribute(MappedAttribute* attr)
{
if (attr->name() == SVGNames::viewBoxAttr) {
float x = 0.0f, y = 0.0f, w = 0.0f, h = 0.0f;
const UChar* c = attr->value().characters();
const UChar* end = c + attr->value().length();
if (parseViewBox(c, end, x, y, w, h))
setViewBoxBaseValue(FloatRect(x, y, w, h));
return true;
} else if (attr->name() == SVGNames::preserveAspectRatioAttr) {
const UChar* c = attr->value().characters();
const UChar* end = c + attr->value().length();
preserveAspectRatioBaseValue()->parsePreserveAspectRatio(c, end);
return true;
}
return false;
}
bool SVGFitToViewBox::isKnownAttribute(const QualifiedName& attrName)
{
return (attrName == SVGNames::viewBoxAttr ||
attrName == SVGNames::preserveAspectRatioAttr);
}
}
#endif // ENABLE(SVG)
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