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Serenity Operating System
1/*
2 * Copyright (c) 2020-2021, the SerenityOS developers.
3 * Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
4 * Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
5 *
6 * SPDX-License-Identifier: BSD-2-Clause
7 */
8
9#pragma once
10
11#include <AK/NonnullRefPtr.h>
12#include <AK/RefPtr.h>
13#include <LibWeb/CSS/Parser/Token.h>
14#include <LibWeb/Forward.h>
15
16namespace Web::CSS::Parser {
17
18// https://www.w3.org/TR/css-syntax-3/#component-value
19class ComponentValue {
20public:
21 ComponentValue(Token);
22 explicit ComponentValue(NonnullRefPtr<Function>);
23 explicit ComponentValue(NonnullRefPtr<Block>);
24 ~ComponentValue();
25
26 bool is_block() const { return m_value.has<NonnullRefPtr<Block>>(); }
27 Block& block() const { return m_value.get<NonnullRefPtr<Block>>(); }
28
29 bool is_function() const { return m_value.has<NonnullRefPtr<Function>>(); }
30 Function& function() const { return m_value.get<NonnullRefPtr<Function>>(); }
31
32 bool is_token() const { return m_value.has<Token>(); }
33 bool is(Token::Type type) const { return is_token() && token().is(type); }
34 Token const& token() const { return m_value.get<Token>(); }
35 operator Token() const { return m_value.get<Token>(); }
36
37 ErrorOr<String> to_string() const;
38 ErrorOr<String> to_debug_string() const;
39
40private:
41 Variant<Token, NonnullRefPtr<Function>, NonnullRefPtr<Block>> m_value;
42};
43}
44
45template<>
46struct AK::Formatter<Web::CSS::Parser::ComponentValue> : Formatter<StringView> {
47 ErrorOr<void> format(FormatBuilder& builder, Web::CSS::Parser::ComponentValue const& component_value)
48 {
49 return Formatter<StringView>::format(builder, TRY(component_value.to_string()));
50 }
51};