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Set is value when constructing custom elements with the new operator (#35930)

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* Add doc comments throughout the code

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Set is-value for elements constructed with the "new" operator

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Allow custom elements to extend <slot>

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

* Update WPT expectations

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>

---------

Signed-off-by: Simon Wülker <simon.wuelker@arcor.de>
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Simon Wülker 2025-03-12 18:53:27 +01:00 • committed by GitHub
parent bb3d28bca7
commit b10c53ba6b
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7 changed files with 71 additions and 373 deletions
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37
components/script/dom/customelementregistry.rs
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@ -664,25 +664,34 @@ pub(crate) enum ConstructionStackEntry {
/// <https://html.spec.whatwg.org/multipage/#custom-element-definition>
#[derive(Clone, JSTraceable, MallocSizeOf)]
pub(crate) struct CustomElementDefinition {
/// <https://html.spec.whatwg.org/multipage/#concept-custom-element-definition-name>
#[no_trace]
pub(crate) name: LocalName,
/// <https://html.spec.whatwg.org/multipage/#concept-custom-element-definition-local-name>
#[no_trace]
pub(crate) local_name: LocalName,
/// <https://html.spec.whatwg.org/multipage/#concept-custom-element-definition-constructor>
#[ignore_malloc_size_of = "Rc"]
pub(crate) constructor: Rc<CustomElementConstructor>,
/// <https://html.spec.whatwg.org/multipage/#concept-custom-element-definition-observed-attributes>
pub(crate) observed_attributes: Vec<DOMString>,
/// <https://html.spec.whatwg.org/multipage/#concept-custom-element-definition-lifecycle-callbacks>
pub(crate) callbacks: LifecycleCallbacks,
/// <https://html.spec.whatwg.org/multipage/#concept-custom-element-definition-construction-stack>
pub(crate) construction_stack: DomRefCell<Vec<ConstructionStackEntry>>,
/// <https://html.spec.whatwg.org/multipage/#concept-custom-element-definition-form-associated>
pub(crate) form_associated: bool,
/// <https://html.spec.whatwg.org/multipage/#concept-custom-element-definition-disable-internals>
pub(crate) disable_internals: bool,
/// <https://html.spec.whatwg.org/multipage/#concept-custom-element-definition-disable-shadow>
pub(crate) disable_shadow: bool,
}
@ -797,19 +806,21 @@ pub(crate) fn upgrade_element(
element: &Element,
can_gc: CanGc,
) {
// Step 1
// Step 1. If element's custom element state is not "undefined" or "uncustomized", then return.
let state = element.get_custom_element_state();
if state != CustomElementState::Undefined && state != CustomElementState::Uncustomized {
return;
}
// Step 2
// Step 2. Set element's custom element definition to definition.
element.set_custom_element_definition(Rc::clone(&definition));
// Step 3
// Step 3. Set element's custom element state to "failed".
element.set_custom_element_state(CustomElementState::Failed);
// Step 4
// Step 4. For each attribute in element's attribute list, in order, enqueue a custom element callback reaction
// with element, callback name "attributeChangedCallback", and « attribute's local name, null, attribute's value,
// attribute's namespace ».
for attr in element.attrs().iter() {
let local_name = attr.local_name().clone();
let value = DOMString::from(&**attr.value());
@ -821,7 +832,8 @@ pub(crate) fn upgrade_element(
);
}
// Step 5
// Step 5. If element is connected, then enqueue a custom element callback reaction with element,
// callback name "connectedCallback", and « ».
if element.is_connected() {
ScriptThread::enqueue_callback_reaction(
element,
@ -830,7 +842,7 @@ pub(crate) fn upgrade_element(
);
}
// Step 6
// Step 6. Add element to the end of definition's construction stack.
definition
.construction_stack
.borrow_mut()
@ -976,7 +988,8 @@ fn run_upgrade_constructor(
/// <https://html.spec.whatwg.org/multipage/#concept-try-upgrade>
pub(crate) fn try_upgrade_element(element: &Element) {
// Step 1
// Step 1. Let definition be the result of looking up a custom element definition given element's node document,
// element's namespace, element's local name, and element's is value.
let document = element.owner_document();
let namespace = element.namespace();
let local_name = element.local_name();
@ -984,7 +997,8 @@ pub(crate) fn try_upgrade_element(element: &Element) {
if let Some(definition) =
document.lookup_custom_element_definition(namespace, local_name, is.as_ref())
{
// Step 2
// Step 2. If definition is not null, then enqueue a custom element upgrade reaction given
// element and definition.
ScriptThread::enqueue_upgrade_reaction(element, definition);
}
}
@ -1242,9 +1256,11 @@ impl CustomElementReactionStack {
element: &Element,
definition: Rc<CustomElementDefinition>,
) {
// Step 1
// Step 1. Add a new upgrade reaction to element's custom element reaction queue,
// with custom element definition definition.
element.push_upgrade_reaction(definition);
// Step 2
// Step 2. Enqueue an element on the appropriate element queue given element.
self.enqueue_element(element);
}
}
@ -1449,6 +1465,7 @@ fn is_extendable_element_interface(element: &str) -> bool {
element == "script" ||
element == "section" ||
element == "select" ||
element == "slot" ||
element == "small" ||
element == "source" ||
element == "span" ||