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LibWeb: Port CSSNamespaceRule to FlyString

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This removes a performance problem where we'd convert the style sheet's
default namespace from DeprecatedFlyString to FlyString once per rule
during selector matching.

The conversion now happens once, during CSS parse. It should eventually
be removed from there as well, but one step at a time. :^)
This commit is contained in:
Andreas Kling 2023-12-01 13:36:40 +01:00
parent d8f84ef76c
commit 189d1e8291
4 changed files with 21 additions and 21 deletions
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10
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
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@ -1358,18 +1358,18 @@ CSSRule* Parser::convert_to_rule(NonnullRefPtr<Rule> rule)
token_stream.skip_whitespace();
auto token = token_stream.next_token();
Optional<DeprecatedString> prefix = {};
Optional<FlyString> prefix = {};
if (token.is(Token::Type::Ident)) {
prefix = token.token().ident().bytes_as_string_view();
prefix = token.token().ident();
token_stream.skip_whitespace();
token = token_stream.next_token();
}
DeprecatedString namespace_uri;
FlyString namespace_uri;
if (token.is(Token::Type::String)) {
namespace_uri = token.token().string();
namespace_uri = MUST(FlyString::from_utf8(token.token().string()));
} else if (auto url = parse_url_function(token); url.has_value()) {
namespace_uri = url.value().to_deprecated_string();
namespace_uri = MUST(FlyString::from_deprecated_fly_string(url.value().to_deprecated_string()));
} else {
dbgln_if(CSS_PARSER_DEBUG, "CSSParser: @namespace rule invalid; discarding.");
return {};