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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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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;
};
}