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Check for XML and XMLS namespace during 'locating a namespace' (#31374)

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* Check for XML and XMLS namespace  during 'locating a namespace'

* Address review comments

* Remove test expectation in legacy layout meta
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Keith Yeung 2024-02-20 10:28:25 +08:00 • committed by GitHub
parent 5b7ee86fd1
commit b993518892
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4 changed files with 22 additions and 41 deletions
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25
components/script/dom/element.rs
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@ -1190,23 +1190,40 @@ impl Element {
// Element branch of https://dom.spec.whatwg.org/#locate-a-namespace
pub fn locate_namespace(&self, prefix: Option<DOMString>) -> Namespace {
let prefix = prefix.map(String::from).map(LocalName::from);
let namespace_prefix = prefix.clone().map(|s| Prefix::from(&*s));
// "1. If prefix is "xml", then return the XML namespace."
if namespace_prefix == Some(namespace_prefix!("xml")) {
return ns!(xml);
}
// "2. If prefix is "xmlns", then return the XMLNS namespace."
if namespace_prefix == Some(namespace_prefix!("xmlns")) {
return ns!(xmlns);
}
let prefix = prefix.map(|s| LocalName::from(&*s));
let inclusive_ancestor_elements = self
.upcast::<Node>()
.inclusive_ancestors(ShadowIncluding::No)
.filter_map(DomRoot::downcast::<Self>);
// Steps 3-4.
// "5. If its parent element is null, then return null."
// "6. Return the result of running locate a namespace on its parent element using prefix."
for element in inclusive_ancestor_elements {
// Step 1.
// "3. If its namespace is non-null and its namespace prefix is prefix, then return
// namespace."
if element.namespace() != &ns!() &&
element.prefix().as_ref().map(|p| &**p) == prefix.as_ref().map(|p| &**p)
{
return element.namespace().clone();
}
// Step 2.
// "4. If it has an attribute whose namespace is the XMLNS namespace, namespace prefix
// is "xmlns", and local name is prefix, or if prefix is null and it has an attribute
// whose namespace is the XMLNS namespace, namespace prefix is null, and local name is
// "xmlns", then return its value if it is not the empty string, and null otherwise."
let attr = ref_filter_map(self.attrs(), |attrs| {
attrs.iter().find(|attr| {
if attr.namespace() != &ns!(xmlns) {