jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include "Frequency.h"
8#include <LibWeb/CSS/StyleValue.h>
9
10namespace Web::CSS {
11
12Frequency::Frequency(int value, Type type)
13 : m_type(type)
14 , m_value(value)
15{
16}
17
18Frequency::Frequency(float value, Type type)
19 : m_type(type)
20 , m_value(value)
21{
22}
23
24Frequency Frequency::make_calculated(NonnullRefPtr<CalculatedStyleValue> calculated_style_value)
25{
26 Frequency frequency { 0, Type::Calculated };
27 frequency.m_calculated_style = move(calculated_style_value);
28 return frequency;
29}
30
31Frequency Frequency::make_hertz(float value)
32{
33 return { value, Type::Hz };
34}
35
36Frequency Frequency::percentage_of(Percentage const& percentage) const
37{
38 VERIFY(!is_calculated());
39
40 return Frequency { percentage.as_fraction() * m_value, m_type };
41}
42
43ErrorOr<String> Frequency::to_string() const
44{
45 if (is_calculated())
46 return m_calculated_style->to_string();
47 return String::formatted("{}{}", m_value, unit_name());
48}
49
50float Frequency::to_hertz() const
51{
52 switch (m_type) {
53 case Type::Calculated:
54 return m_calculated_style->resolve_frequency()->to_hertz();
55 case Type::Hz:
56 return m_value;
57 case Type::kHz:
58 return m_value * 1000;
59 }
60 VERIFY_NOT_REACHED();
61}
62
63StringView Frequency::unit_name() const
64{
65 switch (m_type) {
66 case Type::Calculated:
67 return "calculated"sv;
68 case Type::Hz:
69 return "hz"sv;
70 case Type::kHz:
71 return "khz"sv;
72 }
73 VERIFY_NOT_REACHED();
74}
75
76Optional<Frequency::Type> Frequency::unit_from_name(StringView name)
77{
78 if (name.equals_ignoring_ascii_case("hz"sv)) {
79 return Type::Hz;
80 } else if (name.equals_ignoring_ascii_case("khz"sv)) {
81 return Type::kHz;
82 }
83 return {};
84}
85
86NonnullRefPtr<CalculatedStyleValue> Frequency::calculated_style_value() const
87{
88 VERIFY(!m_calculated_style.is_null());
89 return *m_calculated_style;
90}
91
92}