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LibWeb: Implement CSS sign()
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79fc4c8a82
commit
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@ -3582,6 +3582,18 @@ ErrorOr<OwnPtr<CalculationNode>> Parser::parse_abs_function(Function const& func
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return TRY(AbsCalculationNode::create(calculation_node.release_nonnull()));
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}
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ErrorOr<OwnPtr<CalculationNode>> Parser::parse_sign_function(Function const& function)
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{
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auto calculation_node = TRY(parse_a_calculation(function.values()));
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if (!calculation_node) {
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dbgln_if(CSS_PARSER_DEBUG, "sign() parameter must be a valid calculation"sv);
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return nullptr;
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}
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return TRY(SignCalculationNode::create(calculation_node.release_nonnull()));
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}
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ErrorOr<RefPtr<StyleValue>> Parser::parse_dynamic_value(ComponentValue const& component_value)
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{
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if (component_value.is_function()) {
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@ -3623,6 +3635,9 @@ ErrorOr<OwnPtr<CalculationNode>> Parser::parse_a_calc_function_node(Function con
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if (function.name().equals_ignoring_ascii_case("abs"sv))
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return TRY(parse_abs_function(function));
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if (function.name().equals_ignoring_ascii_case("sign"sv))
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return TRY(parse_sign_function(function));
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dbgln_if(CSS_PARSER_DEBUG, "We didn't implement `{}` function yet", function.name());
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return nullptr;
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}
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@ -294,6 +294,7 @@ private:
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ErrorOr<OwnPtr<CalculationNode>> parse_max_function(Function const&);
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ErrorOr<OwnPtr<CalculationNode>> parse_clamp_function(Function const&);
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ErrorOr<OwnPtr<CalculationNode>> parse_abs_function(Function const&);
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ErrorOr<OwnPtr<CalculationNode>> parse_sign_function(Function const&);
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ErrorOr<RefPtr<StyleValue>> parse_dimension_value(ComponentValue const&);
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ErrorOr<RefPtr<StyleValue>> parse_integer_value(TokenStream<ComponentValue>&);
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ErrorOr<RefPtr<StyleValue>> parse_number_value(TokenStream<ComponentValue>&);
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@ -718,6 +718,65 @@ ErrorOr<void> AbsCalculationNode::dump(StringBuilder& builder, int indent) const
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return {};
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}
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ErrorOr<NonnullOwnPtr<SignCalculationNode>> SignCalculationNode::create(NonnullOwnPtr<CalculationNode> value)
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{
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return adopt_nonnull_own_or_enomem(new (nothrow) SignCalculationNode(move(value)));
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}
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SignCalculationNode::SignCalculationNode(NonnullOwnPtr<CalculationNode> value)
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: CalculationNode(Type::Sign)
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, m_value(move(value))
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{
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}
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SignCalculationNode::~SignCalculationNode() = default;
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ErrorOr<String> SignCalculationNode::to_string() const
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{
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StringBuilder builder;
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builder.append("sign("sv);
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builder.append(TRY(m_value->to_string()));
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builder.append(")"sv);
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return builder.to_string();
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}
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Optional<CalculatedStyleValue::ResolvedType> SignCalculationNode::resolved_type() const
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{
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return CalculatedStyleValue::ResolvedType::Integer;
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}
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bool SignCalculationNode::contains_percentage() const
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{
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return m_value->contains_percentage();
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}
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CalculatedStyleValue::CalculationResult SignCalculationNode::resolve(Optional<Length::ResolutionContext const&> context, CalculatedStyleValue::PercentageBasis const& percentage_basis) const
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{
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auto node_a = m_value->resolve(context, percentage_basis);
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auto node_a_value = resolve_value(node_a.value(), context);
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if (node_a_value < 0)
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return { Number(Number::Type::Integer, -1) };
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if (node_a_value > 0)
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return { Number(Number::Type::Integer, 1) };
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return { Number(Number::Type::Integer, 0) };
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}
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ErrorOr<void> SignCalculationNode::for_each_child_node(Function<ErrorOr<void>(NonnullOwnPtr<CalculationNode>&)> const& callback)
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{
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TRY(m_value->for_each_child_node(callback));
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TRY(callback(m_value));
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return {};
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}
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ErrorOr<void> SignCalculationNode::dump(StringBuilder& builder, int indent) const
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{
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TRY(builder.try_appendff("{: >{}}SIGN: {}\n", "", indent, TRY(to_string())));
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return {};
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}
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void CalculatedStyleValue::CalculationResult::add(CalculationResult const& other, Optional<Length::ResolutionContext const&> context, PercentageBasis const& percentage_basis)
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{
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add_or_subtract_internal(SumOperation::Add, other, context, percentage_basis);
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@ -336,4 +336,22 @@ private:
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NonnullOwnPtr<CalculationNode> m_value;
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};
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class SignCalculationNode final : public CalculationNode {
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public:
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static ErrorOr<NonnullOwnPtr<SignCalculationNode>> create(NonnullOwnPtr<CalculationNode>);
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~SignCalculationNode();
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virtual ErrorOr<String> to_string() const override;
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virtual Optional<CalculatedStyleValue::ResolvedType> resolved_type() const override;
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virtual bool contains_percentage() const override;
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virtual CalculatedStyleValue::CalculationResult resolve(Optional<Length::ResolutionContext const&>, CalculatedStyleValue::PercentageBasis const&) const override;
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virtual ErrorOr<void> for_each_child_node(Function<ErrorOr<void>(NonnullOwnPtr<CalculationNode>&)> const&) override;
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virtual ErrorOr<void> dump(StringBuilder&, int indent) const override;
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private:
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SignCalculationNode(NonnullOwnPtr<CalculationNode>);
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NonnullOwnPtr<CalculationNode> m_value;
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};
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}
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