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LibWeb: Implement CSS sign()

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This commit is contained in:
stelar7 2023-05-27 23:02:39 +02:00 • committed by Sam Atkins
parent 79fc4c8a82
commit e1e382152c
4 changed files with 93 additions and 0 deletions
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15
Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
View file

@ -3582,6 +3582,18 @@ ErrorOr<OwnPtr<CalculationNode>> Parser::parse_abs_function(Function const& func
return TRY(AbsCalculationNode::create(calculation_node.release_nonnull()));
}
ErrorOr<OwnPtr<CalculationNode>> Parser::parse_sign_function(Function const& function)
{
auto calculation_node = TRY(parse_a_calculation(function.values()));
if (!calculation_node) {
dbgln_if(CSS_PARSER_DEBUG, "sign() parameter must be a valid calculation"sv);
return nullptr;
}
return TRY(SignCalculationNode::create(calculation_node.release_nonnull()));
}
ErrorOr<RefPtr<StyleValue>> Parser::parse_dynamic_value(ComponentValue const& component_value)
{
if (component_value.is_function()) {
@ -3623,6 +3635,9 @@ ErrorOr<OwnPtr<CalculationNode>> Parser::parse_a_calc_function_node(Function con
if (function.name().equals_ignoring_ascii_case("abs"sv))
return TRY(parse_abs_function(function));
if (function.name().equals_ignoring_ascii_case("sign"sv))
return TRY(parse_sign_function(function));
dbgln_if(CSS_PARSER_DEBUG, "We didn't implement `{}` function yet", function.name());
return nullptr;
}

1
Userland/Libraries/LibWeb/CSS/Parser/Parser.h
View file

@ -294,6 +294,7 @@ private:
ErrorOr<OwnPtr<CalculationNode>> parse_max_function(Function const&);
ErrorOr<OwnPtr<CalculationNode>> parse_clamp_function(Function const&);
ErrorOr<OwnPtr<CalculationNode>> parse_abs_function(Function const&);
ErrorOr<OwnPtr<CalculationNode>> parse_sign_function(Function const&);
ErrorOr<RefPtr<StyleValue>> parse_dimension_value(ComponentValue const&);
ErrorOr<RefPtr<StyleValue>> parse_integer_value(TokenStream<ComponentValue>&);
ErrorOr<RefPtr<StyleValue>> parse_number_value(TokenStream<ComponentValue>&);

59
Userland/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.cpp
View file

@ -718,6 +718,65 @@ ErrorOr<void> AbsCalculationNode::dump(StringBuilder& builder, int indent) const
return {};
}
ErrorOr<NonnullOwnPtr<SignCalculationNode>> SignCalculationNode::create(NonnullOwnPtr<CalculationNode> value)
{
return adopt_nonnull_own_or_enomem(new (nothrow) SignCalculationNode(move(value)));
}
SignCalculationNode::SignCalculationNode(NonnullOwnPtr<CalculationNode> value)
: CalculationNode(Type::Sign)
, m_value(move(value))
{
}
SignCalculationNode::~SignCalculationNode() = default;
ErrorOr<String> SignCalculationNode::to_string() const
{
StringBuilder builder;
builder.append("sign("sv);
builder.append(TRY(m_value->to_string()));
builder.append(")"sv);
return builder.to_string();
}
Optional<CalculatedStyleValue::ResolvedType> SignCalculationNode::resolved_type() const
{
return CalculatedStyleValue::ResolvedType::Integer;
}
bool SignCalculationNode::contains_percentage() const
{
return m_value->contains_percentage();
}
CalculatedStyleValue::CalculationResult SignCalculationNode::resolve(Optional<Length::ResolutionContext const&> context, CalculatedStyleValue::PercentageBasis const& percentage_basis) const
{
auto node_a = m_value->resolve(context, percentage_basis);
auto node_a_value = resolve_value(node_a.value(), context);
if (node_a_value < 0)
return { Number(Number::Type::Integer, -1) };
if (node_a_value > 0)
return { Number(Number::Type::Integer, 1) };
return { Number(Number::Type::Integer, 0) };
}
ErrorOr<void> SignCalculationNode::for_each_child_node(Function<ErrorOr<void>(NonnullOwnPtr<CalculationNode>&)> const& callback)
{
TRY(m_value->for_each_child_node(callback));
TRY(callback(m_value));
return {};
}
ErrorOr<void> SignCalculationNode::dump(StringBuilder& builder, int indent) const
{
TRY(builder.try_appendff("{: >{}}SIGN: {}\n", "", indent, TRY(to_string())));
return {};
}
void CalculatedStyleValue::CalculationResult::add(CalculationResult const& other, Optional<Length::ResolutionContext const&> context, PercentageBasis const& percentage_basis)
{
add_or_subtract_internal(SumOperation::Add, other, context, percentage_basis);

18
Userland/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.h
View file

@ -336,4 +336,22 @@ private:
NonnullOwnPtr<CalculationNode> m_value;
};
class SignCalculationNode final : public CalculationNode {
public:
static ErrorOr<NonnullOwnPtr<SignCalculationNode>> create(NonnullOwnPtr<CalculationNode>);
~SignCalculationNode();
virtual ErrorOr<String> to_string() const override;
virtual Optional<CalculatedStyleValue::ResolvedType> resolved_type() const override;
virtual bool contains_percentage() const override;
virtual CalculatedStyleValue::CalculationResult resolve(Optional<Length::ResolutionContext const&>, CalculatedStyleValue::PercentageBasis const&) const override;
virtual ErrorOr<void> for_each_child_node(Function<ErrorOr<void>(NonnullOwnPtr<CalculationNode>&)> const&) override;
virtual ErrorOr<void> dump(StringBuilder&, int indent) const override;
private:
SignCalculationNode(NonnullOwnPtr<CalculationNode>);
NonnullOwnPtr<CalculationNode> m_value;
};
}