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LibWeb: Implement CSS pow()

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This commit is contained in:
stelar7 2023-05-28 11:26:42 +02:00 • committed by Sam Atkins
parent 8ef25989b6
commit 9aed8ec7f0
4 changed files with 136 additions and 2 deletions
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58
Userland/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.cpp
View file

@ -1237,6 +1237,64 @@ ErrorOr<void> Atan2CalculationNode::dump(StringBuilder& builder, int indent) con
return {};
}
ErrorOr<NonnullOwnPtr<PowCalculationNode>> PowCalculationNode::create(NonnullOwnPtr<CalculationNode> x, NonnullOwnPtr<CalculationNode> y)
{
return adopt_nonnull_own_or_enomem(new (nothrow) PowCalculationNode(move(x), move(y)));
}
PowCalculationNode::PowCalculationNode(NonnullOwnPtr<CalculationNode> x, NonnullOwnPtr<CalculationNode> y)
: CalculationNode(Type::Pow)
, m_x(move(x))
, m_y(move(y))
{
}
PowCalculationNode::~PowCalculationNode() = default;
ErrorOr<String> PowCalculationNode::to_string() const
{
StringBuilder builder;
builder.append("pow("sv);
builder.append(TRY(m_x->to_string()));
builder.append(", "sv);
builder.append(TRY(m_y->to_string()));
builder.append(")"sv);
return builder.to_string();
}
Optional<CalculatedStyleValue::ResolvedType> PowCalculationNode::resolved_type() const
{
return CalculatedStyleValue::ResolvedType::Number;
}
CalculatedStyleValue::CalculationResult PowCalculationNode::resolve(Optional<Length::ResolutionContext const&> context, CalculatedStyleValue::PercentageBasis const& percentage_basis) const
{
auto node_a = m_x->resolve(context, percentage_basis);
auto node_a_value = resolve_value(node_a.value(), context);
auto node_b = m_y->resolve(context, percentage_basis);
auto node_b_value = resolve_value(node_b.value(), context);
auto result = pow(node_a_value, node_b_value);
return { Number(Number::Type::Number, result) };
}
ErrorOr<void> PowCalculationNode::for_each_child_node(Function<ErrorOr<void>(NonnullOwnPtr<CalculationNode>&)> const& callback)
{
TRY(m_x->for_each_child_node(callback));
TRY(m_y->for_each_child_node(callback));
TRY(callback(m_x));
TRY(callback(m_y));
return {};
}
ErrorOr<void> PowCalculationNode::dump(StringBuilder& builder, int indent) const
{
TRY(builder.try_appendff("{: >{}}POW: {}\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);

27
Userland/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.h
View file

@ -162,6 +162,14 @@ public:
Atan,
Atan2,
// Exponential functions, a sub-type of operator node
// https://drafts.csswg.org/css-values-4/#exponent-funcs
Pow,
Sqrt,
Hypot,
Log,
Exp,
// This only exists during parsing.
Unparsed,
};
@ -523,4 +531,23 @@ private:
NonnullOwnPtr<CalculationNode> m_x;
};
class PowCalculationNode final : public CalculationNode {
public:
static ErrorOr<NonnullOwnPtr<PowCalculationNode>> create(NonnullOwnPtr<CalculationNode>, NonnullOwnPtr<CalculationNode>);
~PowCalculationNode();
virtual ErrorOr<String> to_string() const override;
virtual Optional<CalculatedStyleValue::ResolvedType> resolved_type() const override;
virtual bool contains_percentage() const override { return false; };
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:
explicit PowCalculationNode(NonnullOwnPtr<CalculationNode>, NonnullOwnPtr<CalculationNode>);
NonnullOwnPtr<CalculationNode> m_x;
NonnullOwnPtr<CalculationNode> m_y;
};
}