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LibWeb: Implement Element.getElementsBy{Tag,Class}Name()

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Just like the Document variants, but using the given Element as
for_each_in_subtree_of_type() root.
This commit is contained in:
Linus Groh 2021-02-07 23:44:01 +01:00 committed by Andreas Kling
parent 2a38f008bf
commit 79bab28f5e
Notes: sideshowbarker 2024-07-18 22:31:33 +09:00 
Author: https://github.com/linusg
Commit: https://github.com/SerenityOS/serenity/commit/79bab28f5ef
Pull-request: https://github.com/SerenityOS/serenity/pull/5264
Reviewed-by: https://github.com/Lubrsi
3 changed files with 34 additions and 0 deletions
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28
Userland/Libraries/LibWeb/DOM/Element.cpp
View file

@ -46,6 +46,7 @@
#include <LibWeb/Layout/TableRowGroupBox.h>
#include <LibWeb/Layout/TreeBuilder.h>
#include <LibWeb/Layout/WidgetBox.h>
#include <LibWeb/Namespace.h>
namespace Web::DOM {
@ -344,4 +345,31 @@ bool Element::is_focused() const
return document().focused_element() == this;
}
NonnullRefPtrVector<Element> Element::get_elements_by_tag_name(const FlyString& tag_name) const
{
// FIXME: Support "*" for tag_name
// https://dom.spec.whatwg.org/#concept-getelementsbytagname
NonnullRefPtrVector<Element> elements;
for_each_in_subtree_of_type<Element>([&](auto& element) {
if (element.namespace_() == Namespace::HTML
? element.local_name().to_lowercase() == tag_name.to_lowercase()
: element.local_name() == tag_name) {
elements.append(element);
}
return IterationDecision::Continue;
});
return elements;
}
NonnullRefPtrVector<Element> Element::get_elements_by_class_name(const FlyString& class_name) const
{
NonnullRefPtrVector<Element> elements;
for_each_in_subtree_of_type<Element>([&](auto& element) {
if (element.has_class(class_name, m_document->in_quirks_mode() ? CaseSensitivity::CaseInsensitive : CaseSensitivity::CaseSensitive))
elements.append(element);
return IterationDecision::Continue;
});
return elements;
}
}

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

@ -98,6 +98,9 @@ public:
bool is_focused() const;
virtual bool is_focusable() const { return false; }
NonnullRefPtrVector<Element> get_elements_by_tag_name(const FlyString&) const;
NonnullRefPtrVector<Element> get_elements_by_class_name(const FlyString&) const;
protected:
RefPtr<Layout::Node> create_layout_node() override;

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

@ -8,6 +8,9 @@ interface Element : Node {
boolean hasAttribute(DOMString qualifiedName);
boolean hasAttributes();
ArrayFromVector getElementsByTagName(DOMString tagName);
ArrayFromVector getElementsByClassName(DOMString className);
readonly attribute Element? firstElementChild;
readonly attribute Element? lastElementChild;