#include "config.h"
#include "SVGLocatable.h"
#include "RenderElement.h"
#include "SVGGraphicsElement.h"
#include "SVGImageElement.h"
#include "SVGMatrix.h"
#include "SVGNames.h"
namespace WebCore {
static bool isViewportElement(Node* node)
{
return (node->hasTagName(SVGNames::svgTag)
|| node->hasTagName(SVGNames::symbolTag)
|| node->hasTagName(SVGNames::foreignObjectTag)
|| is<SVGImageElement>(*node));
}
SVGElement* SVGLocatable::nearestViewportElement(const SVGElement* element)
{
ASSERT(element);
for (Element* current = element->parentOrShadowHostElement(); current; current = current->parentOrShadowHostElement()) {
if (isViewportElement(current))
return downcast<SVGElement>(current);
}
return nullptr;
}
SVGElement* SVGLocatable::farthestViewportElement(const SVGElement* element)
{
ASSERT(element);
SVGElement* farthest = nullptr;
for (Element* current = element->parentOrShadowHostElement(); current; current = current->parentOrShadowHostElement()) {
if (isViewportElement(current))
farthest = downcast<SVGElement>(current);
}
return farthest;
}
FloatRect SVGLocatable::getBBox(SVGElement* element, StyleUpdateStrategy styleUpdateStrategy)
{
ASSERT(element);
if (styleUpdateStrategy == AllowStyleUpdate)
element->document().updateLayoutIgnorePendingStylesheets();
if (!element->renderer())
return FloatRect();
return element->renderer()->objectBoundingBox();
}
AffineTransform SVGLocatable::computeCTM(SVGElement* element, CTMScope mode, StyleUpdateStrategy styleUpdateStrategy)
{
ASSERT(element);
if (styleUpdateStrategy == AllowStyleUpdate)
element->document().updateLayoutIgnorePendingStylesheets();
AffineTransform ctm;
SVGElement* stopAtElement = mode == NearestViewportScope ? nearestViewportElement(element) : nullptr;
for (Element* currentElement = element; currentElement; currentElement = currentElement->parentOrShadowHostElement()) {
if (!currentElement->isSVGElement())
break;
ctm = downcast<SVGElement>(*currentElement).localCoordinateSpaceTransform(mode).multiply(ctm);
if (currentElement == stopAtElement)
break;
}
return ctm;
}
ExceptionOr<Ref<SVGMatrix>> SVGLocatable::getTransformToElement(SVGElement* target, StyleUpdateStrategy styleUpdateStrategy)
{
AffineTransform ctm = getCTM(styleUpdateStrategy);
if (is<SVGGraphicsElement>(target)) {
AffineTransform targetCTM = downcast<SVGGraphicsElement>(*target).getCTM(styleUpdateStrategy);
if (auto inverse = targetCTM.inverse())
ctm = inverse.value() * ctm;
else
return Exception { InvalidStateError, ASCIILiteral("Matrix is not invertible") };
}
return SVGMatrix::create(ctm);
}
}