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00023 #include "config.h"
00024 #include "wtf/Platform.h"
00025
00026 #if ENABLE(SVG)
00027 #include "SVGFitToViewBox.h"
00028
00029 #include "AffineTransform.h"
00030 #include "FloatRect.h"
00031 #include "SVGDocumentExtensions.h"
00032 #include "SVGNames.h"
00033 #include "SVGParserUtilities.h"
00034 #include "SVGPreserveAspectRatio.h"
00035
00036
00037 namespace WebCore {
00038
00039 SVGFitToViewBox::SVGFitToViewBox()
00040 : m_viewBox()
00041 , m_preserveAspectRatio(SVGPreserveAspectRatio::create())
00042 {
00043 }
00044
00045 SVGFitToViewBox::~SVGFitToViewBox()
00046 {
00047 }
00048
00049 ANIMATED_PROPERTY_DEFINITIONS_WITH_CONTEXT(SVGFitToViewBox, FloatRect, Rect, rect, ViewBox, viewBox, SVGNames::viewBoxAttr, m_viewBox)
00050 ANIMATED_PROPERTY_DEFINITIONS_WITH_CONTEXT(SVGFitToViewBox, SVGPreserveAspectRatio*, PreserveAspectRatio, preserveAspectRatio, PreserveAspectRatio, preserveAspectRatio, SVGNames::preserveAspectRatioAttr, m_preserveAspectRatio.get())
00051
00052 bool SVGFitToViewBox::parseViewBox(const UChar*& c, const UChar* end, float& x, float& y, float& w, float& h, bool validate)
00053 {
00054 Document* doc = contextElement()->document();
00055 String str(c, end - c);
00056
00057 skipOptionalSpaces(c, end);
00058
00059 bool valid = (parseNumber(c, end, x) && parseNumber(c, end, y) &&
00060 parseNumber(c, end, w) && parseNumber(c, end, h, false));
00061 if (!validate)
00062 return true;
00063 if (!valid) {
00064
00065 return false;
00066 }
00067
00068 if (w < 0.0) {
00069 doc->accessSVGExtensions()->reportError("A negative value for ViewBox width is not allowed");
00070 return false;
00071 } else if (h < 0.0) {
00072 doc->accessSVGExtensions()->reportError("A negative value for ViewBox height is not allowed");
00073 return false;
00074 } else {
00075 skipOptionalSpaces(c, end);
00076 if (c < end) {
00077
00078 return false;
00079 }
00080 }
00081
00082 return true;
00083 }
00084
00085 AffineTransform SVGFitToViewBox::viewBoxToViewTransform(float viewWidth, float viewHeight) const
00086 {
00087 FloatRect viewBoxRect = viewBox();
00088 if (!viewBoxRect.width() || !viewBoxRect.height())
00089 return AffineTransform();
00090
00091 return preserveAspectRatio()->getCTM(viewBoxRect.x(),
00092 viewBoxRect.y(), viewBoxRect.width(), viewBoxRect.height(),
00093 0, 0, viewWidth, viewHeight);
00094 }
00095
00096 bool SVGFitToViewBox::parseMappedAttribute(MappedAttribute* attr)
00097 {
00098 if (attr->name() == SVGNames::viewBoxAttr) {
00099 float x = 0.0f, y = 0.0f, w = 0.0f, h = 0.0f;
00100 const UChar* c = attr->value().characters();
00101 const UChar* end = c + attr->value().length();
00102 if (parseViewBox(c, end, x, y, w, h))
00103 setViewBoxBaseValue(FloatRect(x, y, w, h));
00104 return true;
00105 } else if (attr->name() == SVGNames::preserveAspectRatioAttr) {
00106 const UChar* c = attr->value().characters();
00107 const UChar* end = c + attr->value().length();
00108 preserveAspectRatioBaseValue()->parsePreserveAspectRatio(c, end);
00109 return true;
00110 }
00111
00112 return false;
00113 }
00114
00115 bool SVGFitToViewBox::isKnownAttribute(const QualifiedName& attrName)
00116 {
00117 return (attrName == SVGNames::viewBoxAttr ||
00118 attrName == SVGNames::preserveAspectRatioAttr);
00119 }
00120
00121 }
00122
00123 #endif // ENABLE(SVG)