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/*
* Copyright (c) 2021-2023, 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/Declaration.h>
namespace Web::CSS {
// https://www.w3.org/TR/css-conditional-4/#at-supports
class Supports final : public RefCounted<Supports> {
friend class Parser::Parser;
public:
struct Declaration {
String declaration;
bool evaluate() const;
ErrorOr<String> to_string() const;
};
struct Selector {
String selector;
bool evaluate() const;
ErrorOr<String> to_string() const;
};
struct Feature {
Variant<Declaration, Selector> value;
bool evaluate() const;
ErrorOr<String> to_string() const;
};
struct Condition;
struct InParens {
Variant<NonnullOwnPtr<Condition>, Feature, GeneralEnclosed> value;
bool evaluate() const;
ErrorOr<String> to_string() const;
};
struct Condition {
enum class Type {
Not,
And,
Or,
};
Type type;
Vector<InParens> children;
bool evaluate() const;
ErrorOr<String> to_string() const;
};
static NonnullRefPtr<Supports> create(NonnullOwnPtr<Condition>&& condition)
{
return adopt_ref(*new Supports(move(condition)));
}
bool matches() const { return m_matches; }
ErrorOr<String> to_string() const;
private:
Supports(NonnullOwnPtr<Condition>&&);
NonnullOwnPtr<Condition> m_condition;
bool m_matches { false };
};
}
template<>
struct AK::Formatter<Web::CSS::Supports::InParens> : AK::Formatter<StringView> {
ErrorOr<void> format(FormatBuilder& builder, Web::CSS::Supports::InParens const& in_parens)
{
return Formatter<StringView>::format(builder, TRY(in_parens.to_string()));
}
};
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