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LibWeb: Fix selector matching for non-HTML mixed-case element names

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This change fixes selector matching for non-HTML elements that have
mixed-case names — such as the SVG foreignObject element.

Otherwise, without this change, attempting to use a selector to match
such an element — e.g., document.querySelector("foreignObject") — fails.
This commit is contained in:
sideshowbarker 2024-12-25 20:54:23 +09:00 • committed by Tim Ledbetter
commit 72a86f2df3
Notes: github-actions[bot] 2024-12-25 13:55:02 +00:00
3 changed files with 33 additions and 1 deletions
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2
Libraries/LibWeb/CSS/SelectorEngine.cpp
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@ -799,7 +799,7 @@ static inline bool matches(CSS::Selector::SimpleSelector const& component, Optio
// Reject if the tag name doesn't match
if (component.type == CSS::Selector::SimpleSelector::Type::TagName) {
// See https://html.spec.whatwg.org/multipage/semantics-other.html#case-sensitivity-of-selectors
if (element.document().document_type() == DOM::Document::Type::HTML) {
if (element.document().document_type() == DOM::Document::Type::HTML && element.namespace_uri() == Namespace::HTML) {
if (qualified_name.name.lowercase_name != element.local_name())
return false;
} else if (!Infra::is_ascii_case_insensitive_match(qualified_name.name.name, element.local_name())) {