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LibWeb/CSS: Split out @namespace parsing code

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Sam Atkins 2024-08-09 12:26:38 +01:00 • committed by Andreas Kling
commit 5b883929e0
Notes: github-actions[bot] 2024-08-10 08:39:12 +00:00
2 changed files with 51 additions and 30 deletions
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80
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
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@ -1388,37 +1388,9 @@ CSSRule* Parser::convert_to_rule(NonnullRefPtr<Rule> rule)
return CSSKeyframesRule::create(m_context.realm(), name, CSSRuleList::create(m_context.realm(), move(keyframes)));
}
if (rule->at_rule_name().equals_ignoring_ascii_case("namespace"sv)) {
// https://drafts.csswg.org/css-namespaces/#syntax
auto token_stream = TokenStream { rule->prelude() };
token_stream.skip_whitespace();
auto token = token_stream.next_token();
Optional<FlyString> prefix = {};
if (token.is(Token::Type::Ident)) {
prefix = token.token().ident();
token_stream.skip_whitespace();
token = token_stream.next_token();
}
FlyString namespace_uri;
if (token.is(Token::Type::String)) {
namespace_uri = token.token().string();
} else if (auto url = parse_url_function(token); url.has_value()) {
namespace_uri = MUST(url.value().to_string());
} else {
dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @namespace rule invalid; discarding.");
return {};
}
token_stream.skip_whitespace();
if (token_stream.has_next_token()) {
dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @namespace rule invalid; discarding.");
return {};
}
return CSSNamespaceRule::create(m_context.realm(), prefix, namespace_uri);
}
if (rule->at_rule_name().equals_ignoring_ascii_case("namespace"sv))
return convert_to_namespace_rule(rule);
// FIXME: More at rules!
dbgln_if(CSS_PARSER_DEBUG, "Unrecognized CSS at-rule: @{}", rule->at_rule_name());
@ -1507,6 +1479,54 @@ JS::GCPtr<CSSImportRule> Parser::convert_to_import_rule(Rule& rule)
return CSSImportRule::create(url.value(), const_cast<DOM::Document&>(*m_context.document()));
}
JS::GCPtr<CSSNamespaceRule> Parser::convert_to_namespace_rule(Rule& rule)
{
// https://drafts.csswg.org/css-namespaces/#syntax
// @namespace <namespace-prefix>? [ <string> | <url> ] ;
// <namespace-prefix> = <ident>
if (rule.prelude().is_empty()) {
dbgln_if(CSS_PARSER_DEBUG, "Failed to parse @namespace rule: Empty prelude.");
return {};
}
if (rule.block()) {
dbgln_if(CSS_PARSER_DEBUG, "Failed to parse @namespace rule: Block is not allowed.");
return {};
}
auto tokens = TokenStream { rule.prelude() };
tokens.skip_whitespace();
Optional<FlyString> prefix = {};
if (tokens.peek_token().is(Token::Type::Ident)) {
prefix = tokens.next_token().token().ident();
tokens.skip_whitespace();
}
FlyString namespace_uri;
auto& url_token = tokens.next_token();
if (url_token.is(Token::Type::String)) {
namespace_uri = url_token.token().string();
} else if (auto url = parse_url_function(url_token); url.has_value()) {
namespace_uri = MUST(url.value().to_string());
} else {
dbgln_if(CSS_PARSER_DEBUG, "Failed to parse @namespace rule: Unable to parse `{}` as URL.", url_token.to_debug_string());
return {};
}
tokens.skip_whitespace();
if (tokens.has_next_token()) {
if constexpr (CSS_PARSER_DEBUG) {
dbgln("Failed to parse @namespace rule: Trailing tokens after URL.");
tokens.dump_all_tokens();
}
return {};
}
return CSSNamespaceRule::create(m_context.realm(), prefix, namespace_uri);
}
auto Parser::extract_properties(Vector<DeclarationOrAtRule> const& declarations_and_at_rules) -> PropertiesAndCustomProperties
{
PropertiesAndCustomProperties result;