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LibWeb: Parse min() css math function

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stelar7 2023-05-26 11:21:49 +02:00 • committed by Andreas Kling
parent 570e43a66a
commit 6a10821bfd
4 changed files with 155 additions and 2 deletions
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42
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
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@ -3434,6 +3434,45 @@ ErrorOr<RefPtr<CalculatedStyleValue>> Parser::parse_calculated_value(Vector<Comp
return CalculatedStyleValue::create(calculation_tree.release_nonnull(), calc_type.release_value());
}
ErrorOr<OwnPtr<CalculationNode>> Parser::parse_min_function(Function const& function)
{
TokenStream stream { function.values() };
auto parameters = parse_a_comma_separated_list_of_component_values(stream);
if (parameters.size() == 0) {
dbgln_if(CSS_PARSER_DEBUG, "min() must have at least 1 parameter"sv);
return nullptr;
}
Vector<NonnullOwnPtr<CalculationNode>> calculated_parameters;
calculated_parameters.ensure_capacity(parameters.size());
CalculatedStyleValue::ResolvedType type;
bool first = true;
for (auto& parameter : parameters) {
auto calculation_node = TRY(parse_a_calculation(parameter));
if (!calculation_node) {
dbgln_if(CSS_PARSER_DEBUG, "min() parameters must be valid calculations"sv);
return nullptr;
}
if (first) {
type = calculation_node->resolved_type().value();
first = false;
}
if (calculation_node->resolved_type().value() != type) {
dbgln_if(CSS_PARSER_DEBUG, "min() parameters must all be of the same type"sv);
return nullptr;
}
calculated_parameters.append(calculation_node.release_nonnull());
}
return TRY(MinCalculationNode::create(move(calculated_parameters)));
}
ErrorOr<RefPtr<StyleValue>> Parser::parse_dynamic_value(ComponentValue const& component_value)
{
if (component_value.is_function()) {
@ -3460,6 +3499,9 @@ ErrorOr<OwnPtr<CalculationNode>> Parser::parse_a_calc_function_node(Function con
if (function.name().equals_ignoring_ascii_case("calc"sv))
return TRY(parse_a_calculation(function.values()));
if (function.name().equals_ignoring_ascii_case("min"sv))
return TRY(parse_min_function(function));
dbgln_if(CSS_PARSER_DEBUG, "We didn't implement `{}` function yet", function.name());
return nullptr;
}