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LibWeb: Implement CSS rem()

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This commit is contained in:
stelar7 2023-05-27 19:08:07 +02:00 • committed by Sam Atkins
parent dc042662d1
commit d6db924d47
4 changed files with 127 additions and 0 deletions
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64
Userland/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.cpp
View file

@ -1696,6 +1696,70 @@ ErrorOr<void> ModCalculationNode::dump(StringBuilder& builder, int indent) const
return {};
}
ErrorOr<NonnullOwnPtr<RemCalculationNode>> RemCalculationNode::create(NonnullOwnPtr<CalculationNode> x, NonnullOwnPtr<CalculationNode> y)
{
return adopt_nonnull_own_or_enomem(new (nothrow) RemCalculationNode(move(x), move(y)));
}
RemCalculationNode::RemCalculationNode(NonnullOwnPtr<CalculationNode> x, NonnullOwnPtr<CalculationNode> y)
: CalculationNode(Type::Rem)
, m_x(move(x))
, m_y(move(y))
{
}
RemCalculationNode::~RemCalculationNode() = default;
ErrorOr<String> RemCalculationNode::to_string() const
{
StringBuilder builder;
builder.append("rem("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> RemCalculationNode::resolved_type() const
{
// Note: We check during parsing that all values have the same type
return m_x->resolved_type();
}
bool RemCalculationNode::contains_percentage() const
{
return m_x->contains_percentage() || m_y->contains_percentage();
}
CalculatedStyleValue::CalculationResult RemCalculationNode::resolve(Optional<Length::ResolutionContext const&> context, CalculatedStyleValue::PercentageBasis const& percentage_basis) const
{
auto resolved_type = m_x->resolved_type().value();
auto node_a = m_x->resolve(context, percentage_basis);
auto node_b = m_y->resolve(context, percentage_basis);
auto node_a_value = resolve_value(node_a.value(), context);
auto node_b_value = resolve_value(node_b.value(), context);
auto value = fmod(node_a_value, node_b_value);
return to_resolved_type(resolved_type, value);
}
ErrorOr<void> RemCalculationNode::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> RemCalculationNode::dump(StringBuilder& builder, int indent) const
{
TRY(builder.try_appendff("{: >{}}REM: {}\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);

19
Userland/Libraries/LibWeb/CSS/StyleValues/CalculatedStyleValue.h
View file

@ -676,4 +676,23 @@ private:
NonnullOwnPtr<CalculationNode> m_y;
};
class RemCalculationNode final : public CalculationNode {
public:
static ErrorOr<NonnullOwnPtr<RemCalculationNode>> create(NonnullOwnPtr<CalculationNode>, NonnullOwnPtr<CalculationNode>);
~RemCalculationNode();
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:
RemCalculationNode(NonnullOwnPtr<CalculationNode>, NonnullOwnPtr<CalculationNode>);
NonnullOwnPtr<CalculationNode> m_x;
NonnullOwnPtr<CalculationNode> m_y;
};
}