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LibWeb: Support multiple values in :lang() selector

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Parse them, and also don't give up completely if the first language
listed doesn't match an element.
This commit is contained in:
Sam Atkins 2023-08-16 14:37:47 +01:00 • committed by Andreas Kling
commit 12a2750d1e
Notes: sideshowbarker 2024-07-17 03:27:40 +09:00
5 changed files with 63 additions and 7 deletions
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9
Userland/Libraries/LibWeb/CSS/SelectorEngine.cpp
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@ -44,13 +44,14 @@ static inline bool matches_lang_pseudo_class(DOM::Element const& element, Vector
// FIXME: This is ad-hoc. Implement a proper language range matching algorithm as recommended by BCP47.
for (auto const& language : languages) {
if (language.is_empty())
return false;
continue;
if (language == "*"sv)
return true;
if (!element_language.to_string().contains('-'))
return Infra::is_ascii_case_insensitive_match(element_language, language);
if (!element_language.to_string().contains('-') && Infra::is_ascii_case_insensitive_match(element_language, language))
return true;
auto parts = element_language.to_string().split_limit('-', 2).release_value_but_fixme_should_propagate_errors();
return Infra::is_ascii_case_insensitive_match(parts[0], language);
if (Infra::is_ascii_case_insensitive_match(parts[0], language))
return true;
}
return false;
}