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/*
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/NonnullOwnPtr.h>
#include <AK/RefCounted.h>
#include <AK/String.h>
#include <AK/Variant.h>
#include <AK/Vector.h>
#include <LibWeb/CSS/GeneralEnclosed.h>
#include <LibWeb/CSS/Parser/StyleDeclarationRule.h>
namespace Web::CSS {
// https://www.w3.org/TR/css-conditional-3/#at-supports
class Supports final : public RefCounted<Supports> {
friend class Parser;
public:
struct Feature {
String declaration;
bool evaluate() const;
};
struct Condition;
struct InParens {
Variant<NonnullOwnPtr<Condition>, Feature, GeneralEnclosed> value;
bool evaluate() const;
};
struct Condition {
enum class Type {
Not,
And,
Or,
};
Type type;
Vector<InParens> children;
bool evaluate() const;
};
static NonnullRefPtr<Supports> create(NonnullOwnPtr<Condition>&& condition)
{
return adopt_ref(*new Supports(move(condition)));
}
bool matches() const { return m_matches; }
private:
Supports(NonnullOwnPtr<Condition>&&);
NonnullOwnPtr<Condition> m_condition;
bool m_matches { false };
};
}
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