void HTMLFormControlsCollection::namedGetter(
const AtomicString& name,
RadioNodeListOrElement& returnValue) {
HeapVector<Member<Element>> namedItems;
this->namedItems(name, namedItems);
if (namedItems.isEmpty())
return;
if (namedItems.size() == 1) {
if (!isHTMLImageElement(*namedItems[0]))
returnValue.setElement(namedItems.at(0));
return;
}
// This path never returns a RadioNodeList for <img> because
// onlyMatchingImgElements flag is false by default.
returnValue.setRadioNodeList(ownerNode().radioNodeList(name));
}
void HTMLFormElement::anonymousNamedGetter(const AtomicString& name, RadioNodeListOrElement& returnValue)
{
// Call getNamedElements twice, first time check if it has a value
// and let HTMLFormElement update its cache.
// See issue: 867404
{
WillBeHeapVector<RefPtrWillBeMember<Element>> elements;
getNamedElements(name, elements);
if (elements.isEmpty())
return;
}
// Second call may return different results from the first call,
// but if the first the size cannot be zero.
WillBeHeapVector<RefPtrWillBeMember<Element>> elements;
getNamedElements(name, elements);
ASSERT(!elements.isEmpty());
bool onlyMatchImg = !elements.isEmpty() && isHTMLImageElement(*elements.first());
if (onlyMatchImg) {
UseCounter::count(document(), UseCounter::FormNameAccessForImageElement);
// The following code has performance impact, but it should be small
// because <img> access via <form> name getter is rarely used.
for (auto& element : elements) {
if (isHTMLImageElement(*element) && !element->isDescendantOf(this)) {
UseCounter::count(document(), UseCounter::FormNameAccessForNonDescendantImageElement);
break;
}
}
}
if (elements.size() == 1) {
returnValue.setElement(elements.at(0));
return;
}
returnValue.setRadioNodeList(radioNodeList(name, onlyMatchImg));
}
