SVGFitToViewBox.cpp [plain text]
#include "config.h"
#if ENABLE(SVG)
#include "SVGFitToViewBox.h"
#include "AffineTransform.h"
#include "Attr.h"
#include "Document.h"
#include "FloatRect.h"
#include "MappedAttribute.h"
#include "SVGNames.h"
#include "SVGParserUtilities.h"
#include "SVGPreserveAspectRatio.h"
#include "StringImpl.h"
namespace WebCore {
SVGFitToViewBox::SVGFitToViewBox()
{
}
SVGFitToViewBox::~SVGFitToViewBox()
{
}
bool SVGFitToViewBox::parseViewBox(Document* doc, const UChar*& c, const UChar* end, float& x, float& y, float& w, float& h, bool validate)
{
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) { doc->accessSVGExtensions()->reportError("A negative value for ViewBox width is not allowed");
return false;
} else if (h < 0.0) { doc->accessSVGExtensions()->reportError("A negative value for ViewBox height is not allowed");
return false;
} else {
skipOptionalSpaces(c, end);
if (c < end) { doc->accessSVGExtensions()->reportWarning("Problem parsing viewBox=\"" + str + "\"");
return false;
}
}
return true;
}
AffineTransform SVGFitToViewBox::viewBoxToViewTransform(const FloatRect& viewBoxRect, const SVGPreserveAspectRatio& preserveAspectRatio, float viewWidth, float viewHeight)
{
if (!viewBoxRect.width() || !viewBoxRect.height())
return AffineTransform();
return preserveAspectRatio.getCTM(viewBoxRect.x(), viewBoxRect.y(), viewBoxRect.width(), viewBoxRect.height(), 0, 0, viewWidth, viewHeight);
}
bool SVGFitToViewBox::parseMappedAttribute(Document* document, 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(document, c, end, x, y, w, h))
setViewBoxBaseValue(FloatRect(x, y, w, h));
return true;
} else if (attr->name() == SVGNames::preserveAspectRatioAttr) {
SVGPreserveAspectRatio::parsePreserveAspectRatio(this, attr->value());
return true;
}
return false;
}
bool SVGFitToViewBox::isKnownAttribute(const QualifiedName& attrName)
{
return (attrName == SVGNames::viewBoxAttr ||
attrName == SVGNames::preserveAspectRatioAttr);
}
}
#endif // ENABLE(SVG)