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LibWeb: Parse css math constants

This commit is contained in:
stelar7 2023-05-26 21:24:31 +02:00 committed by Sam Atkins
parent f8527e1cad
commit ba7af82c5c
3 changed files with 124 additions and 0 deletions

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@ -115,6 +115,16 @@ private:
// https://www.w3.org/TR/css-values-4/#calculation-tree
class CalculationNode {
public:
// https://drafts.csswg.org/css-values-4/#calc-constants
// https://drafts.csswg.org/css-values-4/#calc-error-constants
enum class ConstantType {
E,
PI,
NaN,
Infinity,
MinusInfinity,
};
enum class Type {
Numeric,
// NOTE: Currently, any value with a `var()` or `attr()` function in it is always an
@ -138,6 +148,10 @@ public:
Abs,
Sign,
// Constant Nodes
// https://drafts.csswg.org/css-values-4/#calc-constants
Constant,
// This only exists during parsing.
Unparsed,
};
@ -354,4 +368,22 @@ private:
NonnullOwnPtr<CalculationNode> m_value;
};
class ConstantCalculationNode final : public CalculationNode {
public:
static ErrorOr<NonnullOwnPtr<ConstantCalculationNode>> create(CalculationNode::ConstantType);
~ConstantCalculationNode();
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&> context, 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:
ConstantCalculationNode(ConstantType);
CalculationNode::ConstantType m_constant;
};
}