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Serenity Operating System
1/*
2 * Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <AK/RefPtr.h>
10#include <AK/String.h>
11#include <LibWeb/Forward.h>
12
13namespace Web::CSS {
14class Frequency {
15public:
16 enum class Type {
17 Calculated,
18 Hz,
19 kHz
20 };
21
22 static Optional<Type> unit_from_name(StringView);
23
24 Frequency(int value, Type type);
25 Frequency(float value, Type type);
26 static Frequency make_calculated(NonnullRefPtr<CalculatedStyleValue>);
27 static Frequency make_hertz(float);
28 Frequency percentage_of(Percentage const&) const;
29
30 bool is_calculated() const { return m_type == Type::Calculated; }
31 NonnullRefPtr<CalculatedStyleValue> calculated_style_value() const;
32
33 ErrorOr<String> to_string() const;
34 float to_hertz() const;
35
36 bool operator==(Frequency const& other) const
37 {
38 if (is_calculated())
39 return m_calculated_style == other.m_calculated_style;
40 return m_type == other.m_type && m_value == other.m_value;
41 }
42
43private:
44 StringView unit_name() const;
45
46 Type m_type;
47 float m_value { 0 };
48 RefPtr<CalculatedStyleValue> m_calculated_style;
49};
50
51}
52
53template<>
54struct AK::Formatter<Web::CSS::Frequency> : Formatter<StringView> {
55 ErrorOr<void> format(FormatBuilder& builder, Web::CSS::Frequency const& frequency)
56 {
57 return Formatter<StringView>::format(builder, TRY(frequency.to_string()));
58 }
59};