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LibWeb: Delete LegacyPlatformObject and move behavior to PlatformObject

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We have two known PlatformObjects that need to implement some of the
behavior of LegacyPlatformObjects to date: Window, and HTMLFormElement.

To make this not require double (or virtual) inheritance of
PlatformObject, move the behavior of LegacyPlatformObject into
PlatformObject. The selection of LegacyPlatformObject behavior is done
with a new bitfield of feature flags instead of a dozen virtual
functions that return bool. This change simplifies every class involved
in the diff with the notable exception of Window, which now needs some
ugly const casts to implement named property access.
This commit is contained in:
Andrew Kaster 2024-01-09 16:05:03 -07:00 • committed by Andreas Kling
parent 6047f1adcb
commit 521ed0e911
41 changed files with 684 additions and 801 deletions
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23
Userland/Libraries/LibWeb/HTML/Window.cpp
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@ -106,6 +106,11 @@ JS::NonnullGCPtr<Window> Window::create(JS::Realm& realm)
Window::Window(JS::Realm& realm)
: DOM::EventTarget(realm)
{
m_legacy_platform_object_flags = LegacyPlatformObjectFlags {
.supports_named_properties = true,
.has_legacy_unenumerable_named_properties_interface_extended_attribute = true,
.has_global_interface_extended_attribute = true,
};
}
void Window::visit_edges(JS::Cell::Visitor& visitor)
@ -1560,8 +1565,11 @@ OrderedHashMap<FlyString, JS::NonnullGCPtr<Navigable>> Window::document_tree_chi
}
// https://html.spec.whatwg.org/#named-access-on-the-window-object
Vector<FlyString> Window::supported_property_names()
Vector<FlyString> Window::supported_property_names() const
{
// FIXME: Make the const-correctness of the methods this method calls less cowboy.
auto& mutable_this = const_cast<Window&>(*this);
// The Window object supports named properties.
// The supported property names of a Window object window at any moment consist of the following,
// in tree order according to the element that contributed them, ignoring later duplicates:
@ -1569,7 +1577,7 @@ Vector<FlyString> Window::supported_property_names()
HashTable<FlyString> property_names;
// - window's document-tree child navigable target name property set;
auto child_navigable_property_set = document_tree_child_navigable_target_name_property_set();
auto child_navigable_property_set = mutable_this.document_tree_child_navigable_target_name_property_set();
for (auto& entry : child_navigable_property_set)
property_names.set(entry.key, AK::HashSetExistingEntryBehavior::Keep);
@ -1591,19 +1599,22 @@ Vector<FlyString> Window::supported_property_names()
}
// https://html.spec.whatwg.org/#named-access-on-the-window-object
WebIDL::ExceptionOr<JS::Value> Window::named_item_value(FlyString const& name)
WebIDL::ExceptionOr<JS::Value> Window::named_item_value(FlyString const& name) const
{
// FIXME: Make the const-correctness of the methods this method calls less cowboy.
auto& mutable_this = const_cast<Window&>(*this);
// To determine the value of a named property name in a Window object window, the user agent must return the value obtained using the following steps:
// 1. Let objects be the list of named objects of window with the name name.
// NOTE: There will be at least one such object, since the algorithm would otherwise not have been invoked by Web IDL.
auto objects = named_objects(name);
auto objects = mutable_this.named_objects(name);
// 2. If objects contains a navigable, then:
if (!objects.navigables.is_empty()) {
// 1. Let container be the first navigable container in window's associated Document's descendants whose content navigable is in objects.
JS::GCPtr<NavigableContainer> container = nullptr;
associated_document().for_each_in_subtree_of_type<HTML::NavigableContainer>([&](HTML::NavigableContainer& navigable_container) {
mutable_this.associated_document().for_each_in_subtree_of_type<HTML::NavigableContainer>([&](HTML::NavigableContainer& navigable_container) {
if (!navigable_container.content_navigable())
return IterationDecision::Continue;
if (objects.navigables.contains_slow(JS::NonnullGCPtr { *navigable_container.content_navigable() })) {
@ -1623,7 +1634,7 @@ WebIDL::ExceptionOr<JS::Value> Window::named_item_value(FlyString const& name)
// 4. Otherwise return an HTMLCollection rooted at window's associated Document,
// whose filter matches only named objects of window with the name name. (By definition, these will all be elements.)
return DOM::HTMLCollection::create(associated_document(), DOM::HTMLCollection::Scope::Descendants, [name](auto& element) -> bool {
return DOM::HTMLCollection::create(mutable_this.associated_document(), DOM::HTMLCollection::Scope::Descendants, [name](auto& element) -> bool {
if ((is<HTMLEmbedElement>(element) || is<HTMLFormElement>(element) || is<HTMLImageElement>(element) || is<HTMLObjectElement>(element))
&& (element.attribute(AttributeNames::name) == name))
return true;