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LibWeb: Implement CSS log()

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stelar7 2023-05-28 11:53:57 +02:00 • committed by Sam Atkins
parent fa37bb8b76
commit 6dde49404a
4 changed files with 130 additions and 0 deletions
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52
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
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@ -3891,6 +3891,55 @@ ErrorOr<OwnPtr<CalculationNode>> Parser::parse_hypot_function(Function const& fu
return TRY(HypotCalculationNode::create(move(calculated_parameters)));
}
ErrorOr<OwnPtr<CalculationNode>> Parser::parse_log_function(Function const& function)
{
TokenStream stream { function.values() };
auto parameters = parse_a_comma_separated_list_of_component_values(stream);
OwnPtr<CalculationNode> node_b;
if (parameters.size() == 1) {
node_b = TRY(ConstantCalculationNode::create(CalculationNode::ConstantType::E));
} else if (parameters.size() == 2) {
node_b = TRY(parse_a_calculation(parameters[1]));
} else {
dbgln_if(CSS_PARSER_DEBUG, "log() must have exactly one or two parameters"sv);
return nullptr;
}
auto node_a = TRY(parse_a_calculation(parameters[0]));
if (!node_a || !node_b) {
dbgln_if(CSS_PARSER_DEBUG, "log() parameters must be valid calculations"sv);
return nullptr;
}
auto node_a_maybe_parameter_type = node_a->resolved_type();
if (!node_a_maybe_parameter_type.has_value()) {
dbgln_if(CSS_PARSER_DEBUG, "Failed to resolve type for log() parameter 1"sv);
return nullptr;
}
auto node_b_maybe_parameter_type = node_b->resolved_type();
if (!node_b_maybe_parameter_type.has_value()) {
dbgln_if(CSS_PARSER_DEBUG, "Failed to resolve type for log() parameter 2"sv);
return nullptr;
}
auto node_a_resolved_type = node_a_maybe_parameter_type.value();
auto node_b_resolved_type = node_b_maybe_parameter_type.value();
if (node_a_resolved_type != node_b_resolved_type) {
dbgln_if(CSS_PARSER_DEBUG, "log() parameters must be of the same type"sv);
return nullptr;
}
if (node_a_resolved_type != CalculatedStyleValue::ResolvedType::Number) {
dbgln_if(CSS_PARSER_DEBUG, "log() parameters must be numbers"sv);
return nullptr;
}
return TRY(LogCalculationNode::create(node_a.release_nonnull(), node_b.release_nonnull()));
}
ErrorOr<RefPtr<StyleValue>> Parser::parse_dynamic_value(ComponentValue const& component_value)
{
if (component_value.is_function()) {
@ -3965,6 +4014,9 @@ ErrorOr<OwnPtr<CalculationNode>> Parser::parse_a_calc_function_node(Function con
if (function.name().equals_ignoring_ascii_case("hypot"sv))
return TRY(parse_hypot_function(function));
if (function.name().equals_ignoring_ascii_case("log"sv))
return TRY(parse_log_function(function));
dbgln_if(CSS_PARSER_DEBUG, "We didn't implement `{}` function yet", function.name());
return nullptr;
}