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LibWeb: Implement the Element classList attribute

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And ensure it is updated (if it exists) when the 'class' attribute is
changed.
This commit is contained in:
Timothy Flynn 2021-10-18 13:21:23 -04:00 • committed by Andreas Kling
parent d24ae8063b
commit 14349f058a
3 changed files with 14 additions and 0 deletions
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10
Userland/Libraries/LibWeb/DOM/Element.cpp
View file

@ -12,6 +12,7 @@
#include <LibWeb/CSS/SelectorEngine.h>
#include <LibWeb/CSS/StyleInvalidator.h>
#include <LibWeb/DOM/DOMException.h>
#include <LibWeb/DOM/DOMTokenList.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/DOM/ExceptionOr.h>
@ -171,6 +172,8 @@ void Element::parse_attribute(const FlyString& name, const String& value)
for (auto& new_class : new_classes) {
m_classes.unchecked_append(new_class);
}
if (m_class_list)
m_class_list->associated_attribute_changed(value);
} else if (name == HTML::AttributeNames::style) {
auto parsed_style = parse_css_declaration(CSS::ParsingContext(document()), value);
if (!parsed_style.is_null()) {
@ -256,6 +259,13 @@ NonnullRefPtr<CSS::StyleProperties> Element::computed_style()
return properties;
}
RefPtr<DOMTokenList> const& Element::class_list()
{
if (!m_class_list)
m_class_list = DOMTokenList::create(*this, HTML::AttributeNames::class_);
return m_class_list;
}
// https://dom.spec.whatwg.org/#dom-element-matches
DOM::ExceptionOr<bool> Element::matches(StringView selectors) const
{

3
Userland/Libraries/LibWeb/DOM/Element.h
View file

@ -58,6 +58,8 @@ public:
size_t attribute_list_size() const { return m_attributes->length(); }
NonnullRefPtr<NamedNodeMap> const& attributes() const { return m_attributes; }
RefPtr<DOMTokenList> const& class_list();
DOM::ExceptionOr<bool> matches(StringView selectors) const;
int client_top() const;
@ -140,6 +142,7 @@ private:
RefPtr<CSS::StyleProperties> m_specified_css_values;
HashMap<String, CSS::StyleComputer::CustomPropertyResolutionTuple> m_custom_properties;
RefPtr<DOMTokenList> m_class_list;
Vector<FlyString> m_classes;
RefPtr<ShadowRoot> m_shadow_root;

1
Userland/Libraries/LibWeb/DOM/Element.idl
View file

@ -20,6 +20,7 @@ interface Element : Node {
[Reflect] attribute DOMString id;
[Reflect=class] attribute DOMString className;
[SameObject, PutForwards=value] readonly attribute DOMTokenList classList;
boolean matches(DOMString selectors);