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This will be used in generated code to represent missing optionals i.e. `<foo> <bar>?` with only a `<foo>` value will be represented by a `StyleValueList` containing the relevant `<foo>` style value and an `EmptyOptionalStyleValue`
39 lines
1.3 KiB
C++
39 lines
1.3 KiB
C++
/*
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* Copyright (c) 2026, Callum Law <callumlaw1709@outlook.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/CSS/StyleValues/StyleValue.h>
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namespace Web::CSS {
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class EmptyOptionalStyleValue final : public StyleValueWithDefaultOperators<EmptyOptionalStyleValue> {
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public:
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static ValueComparingNonnullRefPtr<EmptyOptionalStyleValue> create()
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{
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auto static const instance = adopt_ref(*new (nothrow) EmptyOptionalStyleValue());
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return instance;
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}
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virtual ~EmptyOptionalStyleValue() override = default;
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// NB: This style is used to represent a missing optional value, it should only appear within a StyleValueList which
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// will skip serializing/tokenizing it and the relevant separator so it should never be serialized/tokenized.
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virtual void serialize(StringBuilder&, SerializationMode) const override { VERIFY_NOT_REACHED(); }
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virtual Vector<Parser::ComponentValue> tokenize() const override { VERIFY_NOT_REACHED(); }
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bool properties_equal(EmptyOptionalStyleValue const&) const { return true; }
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virtual bool is_computationally_independent() const override { return true; }
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private:
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EmptyOptionalStyleValue()
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: StyleValueWithDefaultOperators(Type::EmptyOptional)
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{
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}
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};
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}
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