mirrors/ladybird
0
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-10-16 21:20:18 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

LibWeb: Parse the position-visibility value

Browse source
This commit is contained in:
Tim Ledbetter 2025-10-01 21:52:23 +01:00 • committed by Sam Atkins
commit 85a15ea1d4
Notes: github-actions[bot] 2025-10-07 10:31:32 +00:00
11 changed files with 218 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

58
Libraries/LibWeb/CSS/Parser/PropertyParsing.cpp
View file

@ -752,6 +752,10 @@ Parser::ParseErrorOr<NonnullRefPtr<StyleValue const>> Parser::parse_css_value(Pr
if (auto parsed_value = parse_position_try_fallbacks_value(tokens); parsed_value && !tokens.has_next_token())
return parsed_value.release_nonnull();
return ParseError::SyntaxError;
case PropertyID::PositionVisibility:
if (auto parsed_value = parse_position_visibility_value(tokens); parsed_value && !tokens.has_next_token())
return parsed_value.release_nonnull();
return ParseError::SyntaxError;
case PropertyID::Quotes:
if (auto parsed_value = parse_quotes_value(tokens); parsed_value && !tokens.has_next_token())
return parsed_value.release_nonnull();
@ -4524,6 +4528,60 @@ RefPtr<StyleValue const> Parser::parse_position_area_value(TokenStream<Component
return parse_position_area(tokens);
}
// https://drafts.csswg.org/css-anchor-position/#position-visibility
RefPtr<StyleValue const> Parser::parse_position_visibility_value(TokenStream<ComponentValue>& tokens)
{
// always | [ anchors-valid || anchors-visible || no-overflow ]
if (auto always = parse_all_as_single_keyword_value(tokens, Keyword::Always))
return always;
RefPtr<StyleValue const> anchors_valid_value;
RefPtr<StyleValue const> anchors_visible_value;
RefPtr<StyleValue const> no_overflow_value;
StyleValueVector values;
auto transaction = tokens.begin_transaction();
tokens.discard_whitespace();
while (tokens.has_next_token()) {
auto keyword_value = parse_keyword_value(tokens);
if (!keyword_value)
return nullptr;
switch (keyword_value->to_keyword()) {
case Keyword::AnchorsValid:
if (anchors_valid_value)
return nullptr;
anchors_valid_value = keyword_value.release_nonnull();
break;
case Keyword::AnchorsVisible:
if (anchors_visible_value)
return nullptr;
anchors_visible_value = keyword_value.release_nonnull();
break;
case Keyword::NoOverflow:
if (no_overflow_value)
return nullptr;
no_overflow_value = keyword_value.release_nonnull();
break;
default:
return nullptr;
}
tokens.discard_whitespace();
}
if (anchors_valid_value)
values.append(anchors_valid_value.release_nonnull());
if (anchors_visible_value)
values.append(anchors_visible_value.release_nonnull());
if (no_overflow_value)
values.append(no_overflow_value.release_nonnull());
if (values.is_empty())
return nullptr;
transaction.commit();
return StyleValueList::create(move(values), StyleValueList::Separator::Space);
}
RefPtr<StyleValue const> Parser::parse_quotes_value(TokenStream<ComponentValue>& tokens)
{
// https://www.w3.org/TR/css-content-3/#quotes-property