static inline void removeDisallowedElementsFromSubtree(SVGElement& subtree)
{
ASSERT(!subtree.inDocument());
Vector<Element*> toRemove;
auto it = descendantsOfType<Element>(subtree).begin();
auto end = descendantsOfType<Element>(subtree).end();
while (it != end) {
if (isDisallowedElement(*it)) {
toRemove.append(&*it);
it.traverseNextSkippingChildren();
continue;
}
++it;
}
// The subtree is not in document so this won't generate events that could mutate the tree.
for (unsigned i = 0; i < toRemove.size(); ++i)
toRemove[i]->parentNode()->removeChild(toRemove[i]);
}
void SVGSMILElement::buildPendingResource()
{
clearResourceAndEventBaseReferences();
if (!inDocument()) {
// Reset the target element if we are no longer in the document.
setTargetElement(nullptr);
return;
}
AtomicString id;
const AtomicString& href = SVGURIReference::legacyHrefString(*this);
Element* target;
if (href.isEmpty())
target = parentNode() && parentNode()->isElementNode() ? toElement(parentNode()) : nullptr;
else
target = SVGURIReference::targetElementFromIRIString(href, treeScope(), &id);
SVGElement* svgTarget = target && target->isSVGElement() ? toSVGElement(target) : nullptr;
if (svgTarget && !svgTarget->inDocument())
svgTarget = nullptr;
if (svgTarget != targetElement())
setTargetElement(svgTarget);
if (!svgTarget) {
// Do not register as pending if we are already pending this resource.
if (document().accessSVGExtensions().isElementPendingResource(this, id))
return;
if (!id.isEmpty()) {
document().accessSVGExtensions().addPendingResource(id, this);
ASSERT(hasPendingResources());
}
} else {
// Register us with the target in the dependencies map. Any change of hrefElement
// that leads to relayout/repainting now informs us, so we can react to it.
addReferenceTo(svgTarget);
}
connectEventBaseConditions();
}
void SVGSMILElement::buildPendingResource()
{
clearResourceReferences();
if (!inDocument()) {
// Reset the target element if we are no longer in the document.
setTargetElement(0);
return;
}
String id;
String href = getAttribute(XLinkNames::hrefAttr);
Element* target;
if (href.isEmpty())
target = parentNode() && parentNode()->isElementNode() ? toElement(parentNode()) : 0;
else
target = SVGURIReference::targetElementFromIRIString(href, document(), &id);
SVGElement* svgTarget = target && target->isSVGElement() ? toSVGElement(target) : 0;
if (svgTarget && !svgTarget->inDocument())
svgTarget = 0;
if (svgTarget != targetElement())
setTargetElement(svgTarget);
if (!svgTarget) {
// Do not register as pending if we are already pending this resource.
if (document()->accessSVGExtensions()->isElementPendingResource(this, id))
return;
if (!id.isEmpty()) {
document()->accessSVGExtensions()->addPendingResource(id, this);
ASSERT(hasPendingResources());
}
} else {
// Register us with the target in the dependencies map. Any change of hrefElement
// that leads to relayout/repainting now informs us, so we can react to it.
document()->accessSVGExtensions()->addElementReferencingTarget(this, svgTarget);
}
}
static void removeDisallowedElementsFromSubtree(SVGElement& subtree)
{
// Remove disallowed elements after the fact rather than not cloning them in the first place.
// This optimizes for the normal case where none of those elements are present.
// This function is used only on elements in subtrees that are not yet in documents, so
// mutation events are not a factor; there are no event listeners to handle those events.
// Assert that it's not in a document to make sure callers are still using it this way.
ASSERT(!subtree.inDocument());
Vector<Element*> disallowedElements;
auto descendants = descendantsOfType<Element>(subtree);
for (auto it = descendants.begin(), end = descendants.end(); it != end; ) {
if (isDisallowedElement(*it)) {
disallowedElements.append(&*it);
it.traverseNextSkippingChildren();
continue;
}
++it;
}
for (auto* element : disallowedElements)
element->parentNode()->removeChild(element);
}