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LibWeb/CSS: Add FontSourceStyleValue

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This will be used by the `@font { src: ... }` descriptor once we parse
descriptors as style values.
This commit is contained in:
Sam Atkins 2025-04-02 17:01:16 +01:00
parent 79093291b5
commit 60c536bdd5
Notes: github-actions[bot] 2025-04-04 09:42:16 +00:00
8 changed files with 186 additions and 0 deletions
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63
Libraries/LibWeb/CSS/Parser/ValueParsing.cpp
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@ -16,6 +16,7 @@
#include <AK/GenericLexer.h>
#include <AK/TemporaryChange.h>
#include <LibURL/URL.h>
#include <LibWeb/CSS/FontFace.h>
#include <LibWeb/CSS/Parser/Parser.h>
#include <LibWeb/CSS/PropertyName.h>
#include <LibWeb/CSS/StyleValues/AngleStyleValue.h>
@ -39,6 +40,7 @@
#include <LibWeb/CSS/StyleValues/EdgeStyleValue.h>
#include <LibWeb/CSS/StyleValues/FitContentStyleValue.h>
#include <LibWeb/CSS/StyleValues/FlexStyleValue.h>
#include <LibWeb/CSS/StyleValues/FontSourceStyleValue.h>
#include <LibWeb/CSS/StyleValues/FrequencyStyleValue.h>
#include <LibWeb/CSS/StyleValues/GridTrackPlacementStyleValue.h>
#include <LibWeb/CSS/StyleValues/GridTrackSizeListStyleValue.h>
@ -3655,6 +3657,67 @@ RefPtr<StringStyleValue> Parser::parse_opentype_tag_value(TokenStream<ComponentV
return string_value;
}
RefPtr<FontSourceStyleValue> Parser::parse_font_source_value(TokenStream<ComponentValue>& tokens)
{
// <font-src> = <url> [ format(<font-format>)]? [ tech( <font-tech>#)]? | local(<family-name>)
auto transaction = tokens.begin_transaction();
tokens.discard_whitespace();
// local(<family-name>)
if (tokens.next_token().is_function("local"sv)) {
auto const& function = tokens.consume_a_token().function();
TokenStream function_tokens { function.value };
if (auto family_name = parse_family_name_value(function_tokens)) {
transaction.commit();
return FontSourceStyleValue::create(FontSourceStyleValue::Local { family_name.release_nonnull() }, {});
}
return nullptr;
}
// <url> [ format(<font-format>)]? [ tech( <font-tech>#)]?
auto url = parse_url_function(tokens);
if (!url.has_value() || !url->is_valid())
return nullptr;
Optional<FlyString> format;
tokens.discard_whitespace();
// [ format(<font-format>)]?
if (tokens.next_token().is_function("format"sv)) {
auto const& function = tokens.consume_a_token().function();
auto context_guard = push_temporary_value_parsing_context(FunctionContext { function.name });
TokenStream format_tokens { function.value };
format_tokens.discard_whitespace();
auto const& format_name_token = format_tokens.consume_a_token();
FlyString format_name;
if (format_name_token.is(Token::Type::Ident)) {
format_name = format_name_token.token().ident();
} else if (format_name_token.is(Token::Type::String)) {
format_name = format_name_token.token().string();
} else {
dbgln_if(CSS_PARSER_DEBUG, "CSSParser: font source invalid (`format()` parameter not an ident or string; is: {}); discarding.", format_name_token.to_debug_string());
return nullptr;
}
if (!font_format_is_supported(format_name)) {
dbgln_if(CSS_PARSER_DEBUG, "CSSParser: font source format({}) not supported; skipping.", format_name);
return nullptr;
}
format = move(format_name);
}
tokens.discard_whitespace();
// FIXME: [ tech( <font-tech>#)]?
transaction.commit();
return FontSourceStyleValue::create(url.release_value(), move(format));
}
NonnullRefPtr<CSSStyleValue> Parser::resolve_unresolved_style_value(ParsingParams const& context, DOM::Element& element, Optional<PseudoElement> pseudo_element, PropertyID property_id, UnresolvedStyleValue const& unresolved)
{
// Unresolved always contains a var() or attr(), unless it is a custom property's value, in which case we shouldn't be trying