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Check whether an element is custom in the spec-compliant way (#35960)

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* Check whether element is custom in spec-compliant way

Signed-off-by: Xiaocheng Hu <xiaochengh.work@gmail.com>

* Update tests

Signed-off-by: Xiaocheng Hu <xiaochengh.work@gmail.com>

---------

Signed-off-by: Xiaocheng Hu <xiaochengh.work@gmail.com>
This commit is contained in:
Xiaocheng Hu 2025-03-14 02:03:57 +08:00 • committed by GitHub
parent ea35353e9a
commit 62d6759106
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GPG key ID: B5690EEEBB952194
6 changed files with 71 additions and 13 deletions
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2
components/script/dom/attr.rs
View file

@ -166,7 +166,7 @@ impl Attr {
MutationObserver::queue_a_mutation_record(owner.upcast::<Node>(), mutation);
if owner.get_custom_element_definition().is_some() {
if owner.is_custom() {
let reaction = CallbackReaction::AttributeChanged(
name,
Some(old_value),

17
components/script/dom/element.rs
View file

@ -371,6 +371,11 @@ impl Element {
CustomElementState::Uncustomized
}
/// <https://dom.spec.whatwg.org/#concept-element-custom>
pub(crate) fn is_custom(&self) -> bool {
self.get_custom_element_state() == CustomElementState::Custom
}
pub(crate) fn set_custom_element_definition(&self, definition: Rc<CustomElementDefinition>) {
self.ensure_rare_data().custom_element_definition = Some(definition);
}
@ -1580,7 +1585,7 @@ impl Element {
MutationObserver::queue_a_mutation_record(&self.node, mutation);
if self.get_custom_element_definition().is_some() {
if self.is_custom() {
let value = DOMString::from(&**attr.value());
let reaction = CallbackReaction::AttributeChanged(name, None, Some(value), namespace);
ScriptThread::enqueue_callback_reaction(self, reaction, None);
@ -1772,9 +1777,11 @@ impl Element {
MutationObserver::queue_a_mutation_record(&self.node, mutation);
let reaction =
CallbackReaction::AttributeChanged(name, Some(old_value), None, namespace);
ScriptThread::enqueue_callback_reaction(self, reaction, None);
if self.is_custom() {
let reaction =
CallbackReaction::AttributeChanged(name, Some(old_value), None, namespace);
ScriptThread::enqueue_callback_reaction(self, reaction, None);
}
self.attrs.borrow_mut().remove(idx);
attr.set_owner(None);
@ -2453,7 +2460,7 @@ impl ElementMethods<crate::DomTypeHolder> for Element {
}
// Step 4.
if self.get_custom_element_definition().is_some() {
if self.is_custom() {
let old_name = old_attr.local_name().clone();
let old_value = DOMString::from(&**old_attr.value());
let new_value = DOMString::from(&**attr.value());

5
components/script/dom/node.rs
View file

@ -422,7 +422,8 @@ impl Node {
pub(crate) fn as_custom_element(&self) -> Option<DomRoot<Element>> {
self.downcast::<Element>().and_then(|element| {
if element.get_custom_element_definition().is_some() {
if element.is_custom() {
assert!(element.get_custom_element_definition().is_some());
Some(DomRoot::from_ref(element))
} else {
None
@ -2334,7 +2335,7 @@ impl Node {
.filter_map(DomRoot::downcast::<Element>)
{
// Step 7.7.2, whatwg/dom#833
if descendant.get_custom_element_definition().is_some() {
if descendant.is_custom() {
if descendant.is_connected() {
ScriptThread::enqueue_callback_reaction(
&descendant,