void
nsDOMAttributeMap::DropAttribute(int32_t aNamespaceID, nsIAtom* aLocalName)
{
nsAttrKey attr(aNamespaceID, aLocalName);
Attr *node = mAttributeCache.GetWeak(attr);
if (node) {
// Break link to map
node->SetMap(nullptr);
// Remove from cache
mAttributeCache.Remove(attr);
}
}
already_AddRefed<Attr>
nsDOMAttributeMap::SetNamedItemInternal(Attr& aAttr,
bool aWithNS,
ErrorResult& aError)
{
NS_ENSURE_TRUE(mContent, nullptr);
// XXX should check same-origin between mContent and aAttr however
// nsContentUtils::CheckSameOrigin can't deal with attributenodes yet
// Check that attribute is not owned by somebody else
nsDOMAttributeMap* owner = aAttr.GetMap();
if (owner) {
if (owner != this) {
aError.Throw(NS_ERROR_DOM_INUSE_ATTRIBUTE_ERR);
return nullptr;
}
// setting a preexisting attribute is a no-op, just return the same
// node.
nsRefPtr<Attr> attribute = &aAttr;
return attribute.forget();
}
nsresult rv;
if (!mContent->HasSameOwnerDoc(&aAttr)) {
nsCOMPtr<nsINode> adoptedNode =
mContent->OwnerDoc()->AdoptNode(aAttr, aError);
if (aError.Failed()) {
return nullptr;
}
NS_ASSERTION(adoptedNode == &aAttr, "Uh, adopt node changed nodes?");
}
// Get nodeinfo and preexisting attribute (if it exists)
nsAutoString name;
nsCOMPtr<nsINodeInfo> ni;
nsRefPtr<Attr> attr;
// SetNamedItemNS()
if (aWithNS) {
// Return existing attribute, if present
ni = aAttr.NodeInfo();
if (mContent->HasAttr(ni->NamespaceID(), ni->NameAtom())) {
attr = RemoveAttribute(ni);
}
} else { // SetNamedItem()
aAttr.GetName(name);
// get node-info of old attribute
ni = mContent->GetExistingAttrNameFromQName(name);
if (ni) {
attr = RemoveAttribute(ni);
}
else {
if (mContent->IsInHTMLDocument() &&
mContent->IsHTML()) {
nsContentUtils::ASCIIToLower(name);
}
rv = mContent->NodeInfo()->NodeInfoManager()->
GetNodeInfo(name, nullptr, kNameSpaceID_None,
nsIDOMNode::ATTRIBUTE_NODE, getter_AddRefs(ni));
if (NS_FAILED(rv)) {
aError.Throw(rv);
return nullptr;
}
// value is already empty
}
}
nsAutoString value;
aAttr.GetValue(value);
// Add the new attribute to the attribute map before updating
// its value in the element. @see bug 364413.
nsAttrKey attrkey(ni->NamespaceID(), ni->NameAtom());
mAttributeCache.Put(attrkey, &aAttr);
aAttr.SetMap(this);
rv = mContent->SetAttr(ni->NamespaceID(), ni->NameAtom(),
ni->GetPrefixAtom(), value, true);
if (NS_FAILED(rv)) {
aError.Throw(rv);
DropAttribute(ni->NamespaceID(), ni->NameAtom());
}
return attr.forget();
}