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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
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@ -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
{