fergalmoran/ladybird
1
0
Fork 0
mirror of https://github.com/fergalmoran/ladybird.git synced 2025-12-26 11:20:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

LibWeb: Parse math-depth property using TokenStream

Browse Source 
We don't need to skip whitespace at the top level because that's already
done before we're called. But we do still have to skip it inside the
`add()` function
This commit is contained in:
Sam Atkins
2023-12-08 17:06:04 +00:00
committed by Sam Atkins
parent 6e0a550a03
commit 0578bec655
2 changed files with 13 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
View File

@@ -4443,21 +4443,21 @@ RefPtr<StyleValue> Parser::parse_list_style_value(TokenStream<ComponentValue>& t
{ list_position.release_nonnull(), list_image.release_nonnull(), list_type.release_nonnull() });
}
RefPtr<StyleValue> Parser::parse_math_depth_value(Vector<ComponentValue> const& component_values)
RefPtr<StyleValue> Parser::parse_math_depth_value(TokenStream<ComponentValue>& tokens)
{
// https://w3c.github.io/mathml-core/#propdef-math-depth
// auto-add | add(<integer>) | <integer>
auto tokens = TokenStream { component_values };
auto transaction = tokens.begin_transaction();
tokens.skip_whitespace();
auto token = tokens.next_token();
tokens.skip_whitespace();
if (tokens.has_next_token())
return nullptr;
// auto-add
if (token.is_ident("auto-add"sv))
if (token.is_ident("auto-add"sv)) {
transaction.commit();
return MathDepthStyleValue::create_auto_add();
}
// FIXME: Make it easier to parse "thing that might be <bar> or literally anything that resolves to it" and get rid of this
auto parse_something_that_resolves_to_integer = [this](ComponentValue& token) -> RefPtr<StyleValue> {
@@ -4476,14 +4476,18 @@ RefPtr<StyleValue> Parser::parse_math_depth_value(Vector<ComponentValue> const&
add_tokens.skip_whitespace();
if (add_tokens.has_next_token())
return nullptr;
if (auto integer_value = parse_something_that_resolves_to_integer(integer_token))
if (auto integer_value = parse_something_that_resolves_to_integer(integer_token)) {
transaction.commit();
return MathDepthStyleValue::create_add(integer_value.release_nonnull());
}
return nullptr;
}
// <integer>
if (auto integer_value = parse_something_that_resolves_to_integer(token))
if (auto integer_value = parse_something_that_resolves_to_integer(token)) {
transaction.commit();
return MathDepthStyleValue::create_integer(integer_value.release_nonnull());
}
return nullptr;
}
@@ -5907,7 +5911,7 @@ Parser::ParseErrorOr<NonnullRefPtr<StyleValue>> Parser::parse_css_value(Property
return parsed_value.release_nonnull();
return ParseError::SyntaxError;
case PropertyID::MathDepth:
if (auto parsed_value = parse_math_depth_value(component_values))
if (auto parsed_value = parse_math_depth_value(tokens); parsed_value && !tokens.has_next_token())
return parsed_value.release_nonnull();
return ParseError::SyntaxError;
case PropertyID::Overflow: