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/*
* Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007, 2010 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"
#include "SVGFitToViewBox.h"
#include "AffineTransform.h"
#include "Document.h"
#include "FloatRect.h"
#include "SVGDocumentExtensions.h"
#include "SVGNames.h"
#include "SVGParserUtilities.h"
#include "SVGPreserveAspectRatio.h"
#include <wtf/text/StringView.h>
namespace WebCore {
bool SVGFitToViewBox::parseViewBox(Document* doc, const String& s, FloatRect& viewBox)
{
auto upconvertedCharacters = StringView(s).upconvertedCharacters();
const UChar* characters = upconvertedCharacters;
return parseViewBox(doc, characters, characters + s.length(), viewBox, true);
}
bool SVGFitToViewBox::parseViewBox(Document* doc, const UChar*& c, const UChar* end, FloatRect& viewBox, bool validate)
{
String str(c, end - c);
skipOptionalSVGSpaces(c, end);
float x = 0.0f;
float y = 0.0f;
float width = 0.0f;
float height = 0.0f;
bool valid = parseNumber(c, end, x) && parseNumber(c, end, y) && parseNumber(c, end, width) && parseNumber(c, end, height, false);
if (!validate) {
viewBox = FloatRect(x, y, width, height);
return true;
}
if (!valid) {
doc->accessSVGExtensions().reportWarning("Problem parsing viewBox=\"" + str + "\"");
return false;
}
if (width < 0.0) { // check that width is positive
doc->accessSVGExtensions().reportError("A negative value for ViewBox width is not allowed");
return false;
}
if (height < 0.0) { // check that height is positive
doc->accessSVGExtensions().reportError("A negative value for ViewBox height is not allowed");
return false;
}
skipOptionalSVGSpaces(c, end);
if (c < end) { // nothing should come after the last, fourth number
doc->accessSVGExtensions().reportWarning("Problem parsing viewBox=\"" + str + "\"");
return false;
}
viewBox = FloatRect(x, y, width, height);
return true;
}
AffineTransform SVGFitToViewBox::viewBoxToViewTransform(const FloatRect& viewBoxRect, const SVGPreserveAspectRatio& preserveAspectRatio, float viewWidth, float viewHeight)
{
if (!viewBoxRect.width() || !viewBoxRect.height() || !viewWidth || !viewHeight)
return AffineTransform();
return preserveAspectRatio.getCTM(viewBoxRect.x(), viewBoxRect.y(), viewBoxRect.width(), viewBoxRect.height(), viewWidth, viewHeight);
}
bool SVGFitToViewBox::isKnownAttribute(const QualifiedName& attrName)
{
return attrName == SVGNames::viewBoxAttr || attrName == SVGNames::preserveAspectRatioAttr;
}
void SVGFitToViewBox::addSupportedAttributes(HashSet<QualifiedName>& supportedAttributes)
{
supportedAttributes.add(SVGNames::viewBoxAttr);
supportedAttributes.add(SVGNames::preserveAspectRatioAttr);
}
}
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