AffineTransform SVGGraphicsElement::computeCTM(SVGElement::CTMScope mode,
SVGGraphicsElement::StyleUpdateStrategy styleUpdateStrategy, const SVGGraphicsElement* ancestor) const
{
if (styleUpdateStrategy == AllowStyleUpdate)
document().updateStyleAndLayoutIgnorePendingStylesheets();
AffineTransform ctm;
bool done = false;
for (const Element* currentElement = this; currentElement && !done;
currentElement = currentElement->parentOrShadowHostElement()) {
if (!currentElement->isSVGElement())
break;
ctm = toSVGElement(currentElement)->localCoordinateSpaceTransform(mode).multiply(ctm);
switch (mode) {
case NearestViewportScope:
// Stop at the nearest viewport ancestor.
done = currentElement != this && isViewportElement(*currentElement);
break;
case AncestorScope:
// Stop at the designated ancestor.
done = currentElement == ancestor;
break;
default:
ASSERT(mode == ScreenScope);
break;
}
}
return ctm;
}
SVGElement* SVGGraphicsElement::farthestViewportElement() const
{
SVGElement* farthest = 0;
for (Element* current = parentOrShadowHostElement(); current; current = current->parentOrShadowHostElement()) {
if (isViewportElement(*current))
farthest = toSVGElement(current);
}
return farthest;
}
SVGElement* SVGGraphicsElement::nearestViewportElement() const
{
for (Element* current = parentOrShadowHostElement(); current; current = current->parentOrShadowHostElement()) {
if (isViewportElement(*current))
return toSVGElement(current);
}
return nullptr;
}
SVGElement* SVGLocatable::farthestViewportElement(const SVGElement* element)
{
ASSERT(element);
SVGElement* farthest = 0;
for (ContainerNode* n = element->parentNode(); n; n = n->parentNode()) {
if (isViewportElement(n))
farthest = static_cast<SVGElement*>(n);
}
return farthest;
}
SVGElement* SVGLocatable::nearestViewportElement(const SVGElement* element)
{
ASSERT(element);
for (ContainerNode* n = element->parentNode(); n; n = n->parentNode()) {
if (isViewportElement(n))
return static_cast<SVGElement*>(n);
}
return 0;
}
SVGElement* SVGLocatable::farthestViewportElement(const SVGElement* element)
{
ASSERT(element);
SVGElement* farthest = 0;
for (Element* current = element->parentOrShadowHostElement(); current; current = current->parentOrShadowHostElement()) {
if (isViewportElement(current))
farthest = toSVGElement(current);
}
return farthest;
}
SVGElement* SVGLocatable::nearestViewportElement(const SVGElement* element)
{
ASSERT(element);
for (Element* current = element->parentOrShadowHostElement(); current; current = current->parentOrShadowHostElement()) {
if (isViewportElement(current))
return toSVGElement(current);
}
return 0;
}
