bool SVGSVGElement::checkIntersectionOrEnclosure(
const SVGElement& element,
const FloatRect& rect,
CheckIntersectionOrEnclosure mode) const {
LayoutObject* layoutObject = element.layoutObject();
ASSERT(!layoutObject || layoutObject->style());
if (!layoutObject ||
layoutObject->style()->pointerEvents() == EPointerEvents::None)
return false;
if (!isIntersectionOrEnclosureTarget(layoutObject))
return false;
AffineTransform ctm = toSVGGraphicsElement(element).computeCTM(
AncestorScope, DisallowStyleUpdate, this);
FloatRect mappedRepaintRect =
ctm.mapRect(layoutObject->visualRectInLocalSVGCoordinates());
bool result = false;
switch (mode) {
case CheckIntersection:
result = intersectsAllowingEmpty(rect, mappedRepaintRect);
break;
case CheckEnclosure:
result = rect.contains(mappedRepaintRect);
break;
default:
ASSERT_NOT_REACHED();
break;
}
return result;
}
bool RenderSVGModelObject::checkIntersection(RenderObject* renderer, const FloatRect& rect)
{
if (!renderer || renderer->style()->pointerEvents() == PE_NONE)
return false;
if (!isGraphicsElement(renderer))
return false;
AffineTransform ctm;
getElementCTM(static_cast<SVGElement*>(renderer->node()), ctm);
return intersectsAllowingEmpty(rect, ctm.mapRect(renderer->repaintRectInLocalCoordinates()));
}
// FloatRect::intersects does not consider horizontal or vertical lines (because of isEmpty()).
// So special-case handling of such lines.
static bool intersectsAllowingEmpty(const FloatRect& r, const FloatRect& other)
{
if (r.isEmpty() && other.isEmpty())
return false;
if (r.isEmpty() && !other.isEmpty()) {
return (other.contains(r.x(), r.y()) && !other.contains(r.maxX(), r.maxY()))
|| (!other.contains(r.x(), r.y()) && other.contains(r.maxX(), r.maxY()));
}
if (other.isEmpty() && !r.isEmpty())
return intersectsAllowingEmpty(other, r);
return r.intersects(other);
}
bool RenderSVGModelObject::checkIntersection(RenderElement* renderer, const FloatRect& rect)
{
if (!renderer || renderer->style().pointerEvents() == PE_NONE)
return false;
if (!isGraphicsElement(*renderer))
return false;
AffineTransform ctm;
SVGElement* svgElement = downcast<SVGElement>(renderer->element());
getElementCTM(svgElement, ctm);
ASSERT(svgElement->renderer());
return intersectsAllowingEmpty(rect, ctm.mapRect(svgElement->renderer()->repaintRectInLocalCoordinates()));
}
