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LibWeb/CSS: Make :heading() pseudo-class take integers not AN+B

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Corresponds to 8eb3787e34
This commit is contained in:
Sam Atkins 2025-08-28 10:29:57 +01:00 • committed by Jelle Raaijmakers
commit d461e96f40
Notes: github-actions[bot] 2025-08-28 10:41:31 +00:00
10 changed files with 79 additions and 161 deletions
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43
Libraries/LibWeb/CSS/Parser/SelectorParsing.cpp
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@ -899,6 +899,49 @@ Parser::ParseErrorOr<Selector::SimpleSelector> Parser::parse_pseudo_simple_selec
.languages = move(languages) }
};
}
case PseudoClassMetadata::ParameterType::LevelList: {
// https://drafts.csswg.org/selectors-5/#heading-functional-pseudo
// :heading() = :heading( <level># )
// where <level> is a <number-token> with its type flag set to "integer".
Vector<i64> levels;
auto function_token_stream = TokenStream(pseudo_function.value);
auto level_lists = parse_a_comma_separated_list_of_component_values(function_token_stream);
for (auto const& level_tokens : level_lists) {
TokenStream level_token_stream { level_tokens };
level_token_stream.discard_whitespace();
auto& maybe_integer = level_token_stream.consume_a_token();
level_token_stream.discard_whitespace();
if (!maybe_integer.is(Token::Type::Number) || !maybe_integer.token().number().is_integer()) {
ErrorReporter::the().report(InvalidPseudoClassOrElementError {
.name = MUST(String::formatted(":{}", pseudo_function.name)),
.value_string = pseudo_class_token.to_string(),
.description = "Failed to parse argument as a <level>: Not an <integer> literal."_string,
});
return ParseError::SyntaxError;
}
if (level_token_stream.has_next_token()) {
ErrorReporter::the().report(InvalidPseudoClassOrElementError {
.name = MUST(String::formatted(":{}", pseudo_function.name)),
.value_string = pseudo_class_token.to_string(),
.description = "Failed to parse argument as a <level>: Has trailing tokens."_string,
});
return ParseError::SyntaxError;
}
levels.append(maybe_integer.token().number().integer_value());
}
return Selector::SimpleSelector {
.type = Selector::SimpleSelector::Type::PseudoClass,
.value = Selector::SimpleSelector::PseudoClassSelector {
.type = pseudo_class,
.levels = move(levels),
}
};
}
case PseudoClassMetadata::ParameterType::RelativeSelectorList:
case PseudoClassMetadata::ParameterType::SelectorList: {
auto function_token_stream = TokenStream(pseudo_function.value);