LinearGradientAttributes SVGLinearGradientElement::collectGradientProperties()
{
LinearGradientAttributes attributes;
HashSet<SVGGradientElement*> processedGradients;
bool isLinear = true;
SVGGradientElement* current = this;
while (current) {
if (!attributes.hasSpreadMethod() && current->hasAttribute(SVGNames::spreadMethodAttr))
attributes.setSpreadMethod((GradientSpreadMethod) current->spreadMethod());
if (!attributes.hasBoundingBoxMode() && current->hasAttribute(SVGNames::gradientUnitsAttr))
attributes.setBoundingBoxMode(current->gradientUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
if (!attributes.hasGradientTransform() && current->hasAttribute(SVGNames::gradientTransformAttr))
attributes.setGradientTransform(current->gradientTransform()->consolidate().matrix());
if (!attributes.hasStops()) {
const Vector<Gradient::ColorStop>& stops(current->buildStops());
if (!stops.isEmpty())
attributes.setStops(stops);
}
if (isLinear) {
SVGLinearGradientElement* linear = static_cast<SVGLinearGradientElement*>(current);
if (!attributes.hasX1() && current->hasAttribute(SVGNames::x1Attr))
attributes.setX1(linear->x1());
if (!attributes.hasY1() && current->hasAttribute(SVGNames::y1Attr))
attributes.setY1(linear->y1());
if (!attributes.hasX2() && current->hasAttribute(SVGNames::x2Attr))
attributes.setX2(linear->x2());
if (!attributes.hasY2() && current->hasAttribute(SVGNames::y2Attr))
attributes.setY2(linear->y2());
}
processedGradients.add(current);
// Respect xlink:href, take attributes from referenced element
Node* refNode = ownerDocument()->getElementById(SVGURIReference::getTarget(current->href()));
if (refNode && (refNode->hasTagName(SVGNames::linearGradientTag) || refNode->hasTagName(SVGNames::radialGradientTag))) {
current = static_cast<SVGGradientElement*>(refNode);
// Cycle detection
if (processedGradients.contains(current))
return LinearGradientAttributes();
isLinear = current->hasTagName(SVGNames::linearGradientTag);
} else
current = 0;
}
return attributes;
}
static void setGradientAttributes(SVGGradientElement& element, RadialGradientAttributes& attributes, bool isRadial = true)
{
if (!attributes.hasSpreadMethod() && element.hasAttribute(SVGNames::spreadMethodAttr))
attributes.setSpreadMethod(element.spreadMethod());
if (!attributes.hasGradientUnits() && element.hasAttribute(SVGNames::gradientUnitsAttr))
attributes.setGradientUnits(element.gradientUnits());
if (!attributes.hasGradientTransform() && element.hasAttribute(SVGNames::gradientTransformAttr)) {
AffineTransform transform;
element.gradientTransform().concatenate(transform);
attributes.setGradientTransform(transform);
}
if (!attributes.hasStops()) {
const Vector<Gradient::ColorStop>& stops(element.buildStops());
if (!stops.isEmpty())
attributes.setStops(stops);
}
if (isRadial) {
SVGRadialGradientElement& radial = downcast<SVGRadialGradientElement>(element);
if (!attributes.hasCx() && element.hasAttribute(SVGNames::cxAttr))
attributes.setCx(radial.cx());
if (!attributes.hasCy() && element.hasAttribute(SVGNames::cyAttr))
attributes.setCy(radial.cy());
if (!attributes.hasR() && element.hasAttribute(SVGNames::rAttr))
attributes.setR(radial.r());
if (!attributes.hasFx() && element.hasAttribute(SVGNames::fxAttr))
attributes.setFx(radial.fx());
if (!attributes.hasFy() && element.hasAttribute(SVGNames::fyAttr))
attributes.setFy(radial.fy());
if (!attributes.hasFr() && element.hasAttribute(SVGNames::frAttr))
attributes.setFr(radial.fr());
}
}
static void setGradientAttributes(SVGGradientElement& element, LinearGradientAttributes& attributes, bool isLinear = true)
{
if (!attributes.hasSpreadMethod() && element.hasAttribute(SVGNames::spreadMethodAttr))
attributes.setSpreadMethod(element.spreadMethod());
if (!attributes.hasGradientUnits() && element.hasAttribute(SVGNames::gradientUnitsAttr))
attributes.setGradientUnits(element.gradientUnits());
if (!attributes.hasGradientTransform() && element.hasAttribute(SVGNames::gradientTransformAttr)) {
AffineTransform transform;
element.gradientTransform().concatenate(transform);
attributes.setGradientTransform(transform);
}
if (!attributes.hasStops()) {
const Vector<Gradient::ColorStop>& stops(element.buildStops());
if (!stops.isEmpty())
attributes.setStops(stops);
}
if (isLinear) {
SVGLinearGradientElement& linear = downcast<SVGLinearGradientElement>(element);
if (!attributes.hasX1() && element.hasAttribute(SVGNames::x1Attr))
attributes.setX1(linear.x1());
if (!attributes.hasY1() && element.hasAttribute(SVGNames::y1Attr))
attributes.setY1(linear.y1());
if (!attributes.hasX2() && element.hasAttribute(SVGNames::x2Attr))
attributes.setX2(linear.x2());
if (!attributes.hasY2() && element.hasAttribute(SVGNames::y2Attr))
attributes.setY2(linear.y2());
}
}