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LibWeb: Visit custom element definitions in CustomElementRegistry

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Aliaksandr Kalenik 2024-03-11 19:37:21 +01:00 • committed by Alexander Kalenik
parent bf8bbea209
commit 90112468ac
2 changed files with 15 additions and 7 deletions
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19
Userland/Libraries/LibWeb/HTML/CustomElements/CustomElementRegistry.cpp
View file

@ -36,6 +36,13 @@ void CustomElementRegistry::initialize(JS::Realm& realm)
set_prototype(&Bindings::ensure_web_prototype<Bindings::CustomElementRegistryPrototype>(realm, "CustomElementRegistry"_fly_string));
}
void CustomElementRegistry::visit_edges(Visitor& visitor)
{
Base::visit_edges(visitor);
for (auto& definition : m_custom_element_definitions)
visitor.visit(definition);
}
// https://webidl.spec.whatwg.org/#es-callback-function
static JS::ThrowCompletionOr<JS::NonnullGCPtr<WebIDL::CallbackType>> convert_value_to_callback_function(JS::VM& vm, JS::Value value)
{
@ -119,7 +126,7 @@ JS::ThrowCompletionOr<void> CustomElementRegistry::define(String const& name, We
return JS::throw_completion(WebIDL::SyntaxError::create(realm, MUST(String::formatted("'{}' is not a valid custom element name"sv, name))));
// 3. If this CustomElementRegistry contains an entry with name name, then throw a "NotSupportedError" DOMException.
auto existing_definition_with_name_iterator = m_custom_element_definitions.find_if([&name](JS::Handle<CustomElementDefinition> const& definition) {
auto existing_definition_with_name_iterator = m_custom_element_definitions.find_if([&name](auto const& definition) {
return definition->name() == name;
});
@ -127,7 +134,7 @@ JS::ThrowCompletionOr<void> CustomElementRegistry::define(String const& name, We
return JS::throw_completion(WebIDL::NotSupportedError::create(realm, MUST(String::formatted("A custom element with name '{}' is already defined"sv, name))));
// 4. If this CustomElementRegistry contains an entry with constructor constructor, then throw a "NotSupportedError" DOMException.
auto existing_definition_with_constructor_iterator = m_custom_element_definitions.find_if([&constructor](JS::Handle<CustomElementDefinition> const& definition) {
auto existing_definition_with_constructor_iterator = m_custom_element_definitions.find_if([&constructor](auto const& definition) {
return definition->constructor().callback == constructor->callback;
});
@ -274,7 +281,7 @@ JS::ThrowCompletionOr<void> CustomElementRegistry::define(String const& name, We
auto definition = CustomElementDefinition::create(realm, name, local_name, *constructor, move(observed_attributes), move(lifecycle_callbacks), form_associated, disable_internals, disable_shadow);
// 16. Add definition to this CustomElementRegistry.
m_custom_element_definitions.append(JS::make_handle(*definition));
m_custom_element_definitions.append(definition);
// 17. Let document be this CustomElementRegistry's relevant global object's associated Document.
auto& document = verify_cast<HTML::Window>(relevant_global_object(*this)).associated_document();
@ -319,12 +326,12 @@ JS::ThrowCompletionOr<void> CustomElementRegistry::define(String const& name, We
Variant<JS::Handle<WebIDL::CallbackType>, JS::Value> CustomElementRegistry::get(String const& name) const
{
// 1. If this CustomElementRegistry contains an entry with name name, then return that entry's constructor.
auto existing_definition_iterator = m_custom_element_definitions.find_if([&name](JS::Handle<CustomElementDefinition> const& definition) {
auto existing_definition_iterator = m_custom_element_definitions.find_if([&name](auto const& definition) {
return definition->name() == name;
});
if (!existing_definition_iterator.is_end())
return JS::make_handle(existing_definition_iterator->cell()->constructor());
return JS::make_handle((*existing_definition_iterator)->constructor());
// 2. Otherwise, return undefined.
return JS::js_undefined();
@ -349,7 +356,7 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> CustomElementRegistry::when_d
if (existing_definition_iterator != m_custom_element_definitions.end()) {
auto promise = JS::Promise::create(realm);
promise->fulfill(existing_definition_iterator->cell()->constructor().callback);
promise->fulfill((*existing_definition_iterator)->constructor().callback);
return promise;
}

3
Userland/Libraries/LibWeb/HTML/CustomElements/CustomElementRegistry.h
View file

@ -36,9 +36,10 @@ private:
CustomElementRegistry(JS::Realm&);
virtual void initialize(JS::Realm&) override;
virtual void visit_edges(Visitor&) override;
// Every CustomElementRegistry has a set of custom element definitions, initially empty. In general, algorithms in this specification look up elements in the registry by any of name, local name, or constructor.
Vector<JS::Handle<CustomElementDefinition>> m_custom_element_definitions;
Vector<JS::NonnullGCPtr<CustomElementDefinition>> m_custom_element_definitions;
// https://html.spec.whatwg.org/multipage/custom-elements.html#element-definition-is-running
// Every CustomElementRegistry also has an element definition is running flag which is used to prevent reentrant invocations of element definition. It is initially unset.