| | | 1 | | // Licensed to the .NET Foundation under one or more agreements. |
| | | 2 | | // The .NET Foundation licenses this file to you under the MIT license. |
| | | 3 | | |
| | | 4 | | namespace System.Globalization |
| | | 5 | | { |
| | | 6 | | /// <summary> |
| | | 7 | | /// Taiwan calendar is based on the Gregorian calendar. And the year is an offset to Gregorian calendar. |
| | | 8 | | /// That is, |
| | | 9 | | /// Taiwan year = Gregorian year - 1911. So 1912/01/01 A.D. is Taiwan 1/01/01 |
| | | 10 | | /// </summary> |
| | | 11 | | /// <remarks> |
| | | 12 | | /// Calendar support range: |
| | | 13 | | /// Calendar Minimum Maximum |
| | | 14 | | /// ========== ========== ========== |
| | | 15 | | /// Gregorian 1912/01/01 9999/12/31 |
| | | 16 | | /// Taiwan 01/01/01 8088/12/31 |
| | | 17 | | /// </remarks> |
| | | 18 | | public class TaiwanCalendar : Calendar |
| | | 19 | | { |
| | | 20 | | // Since |
| | | 21 | | // Gregorian Year = Era Year + yearOffset |
| | | 22 | | // When Gregorian Year 1912 is year 1, so that |
| | | 23 | | // 1912 = 1 + yearOffset |
| | | 24 | | // So yearOffset = 1911 |
| | 0 | 25 | | private static readonly EraInfo[] s_taiwanEraInfo = |
| | 0 | 26 | | [ |
| | 0 | 27 | | new EraInfo(1, 1912, 1, 1, 1911, 1, GregorianCalendar.MaxYear - 1911) // era #, start year/month/day, yea |
| | 0 | 28 | | ]; |
| | | 29 | | |
| | | 30 | | private static Calendar? s_defaultInstance; |
| | | 31 | | |
| | | 32 | | private readonly GregorianCalendarHelper _helper; |
| | | 33 | | |
| | 0 | 34 | | internal static Calendar GetDefaultInstance() => s_defaultInstance ??= new TaiwanCalendar(); |
| | | 35 | | |
| | 0 | 36 | | private static readonly DateTime s_calendarMinValue = new DateTime(1912, 1, 1); |
| | | 37 | | |
| | 0 | 38 | | public override DateTime MinSupportedDateTime => s_calendarMinValue; |
| | | 39 | | |
| | 0 | 40 | | public override DateTime MaxSupportedDateTime => DateTime.MaxValue; |
| | | 41 | | |
| | 0 | 42 | | public override CalendarAlgorithmType AlgorithmType => CalendarAlgorithmType.SolarCalendar; |
| | | 43 | | |
| | 0 | 44 | | public TaiwanCalendar() |
| | | 45 | | { |
| | | 46 | | try |
| | | 47 | | { |
| | 0 | 48 | | new CultureInfo("zh-TW"); |
| | 0 | 49 | | } |
| | 0 | 50 | | catch (ArgumentException e) |
| | | 51 | | { |
| | 0 | 52 | | throw new TypeInitializationException(GetType().ToString(), e); |
| | | 53 | | } |
| | | 54 | | |
| | 0 | 55 | | _helper = new GregorianCalendarHelper(this, s_taiwanEraInfo); |
| | 0 | 56 | | } |
| | | 57 | | |
| | 0 | 58 | | internal override CalendarId ID => CalendarId.TAIWAN; |
| | | 59 | | |
| | | 60 | | public override DateTime AddMonths(DateTime time, int months) |
| | | 61 | | { |
| | 0 | 62 | | return _helper.AddMonths(time, months); |
| | | 63 | | } |
| | | 64 | | |
| | | 65 | | public override DateTime AddYears(DateTime time, int years) |
| | | 66 | | { |
| | 0 | 67 | | return _helper.AddYears(time, years); |
| | | 68 | | } |
| | | 69 | | |
| | | 70 | | public override int GetDaysInMonth(int year, int month, int era) |
| | | 71 | | { |
| | 0 | 72 | | return _helper.GetDaysInMonth(year, month, era); |
| | | 73 | | } |
| | | 74 | | |
| | | 75 | | public override int GetDaysInYear(int year, int era) |
| | | 76 | | { |
| | 0 | 77 | | return _helper.GetDaysInYear(year, era); |
| | | 78 | | } |
| | | 79 | | |
| | | 80 | | public override int GetDayOfMonth(DateTime time) |
| | | 81 | | { |
| | 0 | 82 | | return _helper.GetDayOfMonth(time); |
| | | 83 | | } |
| | | 84 | | |
| | | 85 | | public override DayOfWeek GetDayOfWeek(DateTime time) |
| | | 86 | | { |
| | 0 | 87 | | return _helper.GetDayOfWeek(time); |
| | | 88 | | } |
| | | 89 | | |
| | | 90 | | public override int GetDayOfYear(DateTime time) |
| | | 91 | | { |
| | 0 | 92 | | return _helper.GetDayOfYear(time); |
| | | 93 | | } |
| | | 94 | | |
| | | 95 | | public override int GetMonthsInYear(int year, int era) |
| | | 96 | | { |
| | 0 | 97 | | return _helper.GetMonthsInYear(year, era); |
| | | 98 | | } |
| | | 99 | | |
| | | 100 | | public override int GetWeekOfYear(DateTime time, CalendarWeekRule rule, DayOfWeek firstDayOfWeek) |
| | | 101 | | { |
| | 0 | 102 | | return _helper.GetWeekOfYear(time, rule, firstDayOfWeek); |
| | | 103 | | } |
| | | 104 | | |
| | | 105 | | public override int GetEra(DateTime time) |
| | | 106 | | { |
| | 0 | 107 | | return _helper.GetEra(time); |
| | | 108 | | } |
| | | 109 | | |
| | | 110 | | public override int GetMonth(DateTime time) |
| | | 111 | | { |
| | 0 | 112 | | return _helper.GetMonth(time); |
| | | 113 | | } |
| | | 114 | | |
| | | 115 | | public override int GetYear(DateTime time) |
| | | 116 | | { |
| | 0 | 117 | | return _helper.GetYear(time); |
| | | 118 | | } |
| | | 119 | | |
| | | 120 | | public override bool IsLeapDay(int year, int month, int day, int era) |
| | | 121 | | { |
| | 0 | 122 | | return _helper.IsLeapDay(year, month, day, era); |
| | | 123 | | } |
| | | 124 | | |
| | | 125 | | public override bool IsLeapYear(int year, int era) |
| | | 126 | | { |
| | 0 | 127 | | return _helper.IsLeapYear(year, era); |
| | | 128 | | } |
| | | 129 | | |
| | | 130 | | public override int GetLeapMonth(int year, int era) |
| | | 131 | | { |
| | 0 | 132 | | return _helper.GetLeapMonth(year, era); |
| | | 133 | | } |
| | | 134 | | |
| | | 135 | | public override bool IsLeapMonth(int year, int month, int era) |
| | | 136 | | { |
| | 0 | 137 | | return _helper.IsLeapMonth(year, month, era); |
| | | 138 | | } |
| | | 139 | | |
| | | 140 | | public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisec |
| | | 141 | | { |
| | 0 | 142 | | return _helper.ToDateTime(year, month, day, hour, minute, second, millisecond, era); |
| | | 143 | | } |
| | | 144 | | |
| | 0 | 145 | | public override int[] Eras => _helper.Eras; |
| | | 146 | | |
| | | 147 | | private const int DefaultTwoDigitYearMax = 99; |
| | | 148 | | |
| | | 149 | | public override int TwoDigitYearMax |
| | | 150 | | { |
| | | 151 | | get |
| | | 152 | | { |
| | 0 | 153 | | if (_twoDigitYearMax == -1) |
| | | 154 | | { |
| | 0 | 155 | | _twoDigitYearMax = GetSystemTwoDigitYearSetting(ID, DefaultTwoDigitYearMax); |
| | | 156 | | } |
| | | 157 | | |
| | 0 | 158 | | return _twoDigitYearMax; |
| | | 159 | | } |
| | | 160 | | set |
| | | 161 | | { |
| | 0 | 162 | | VerifyWritable(); |
| | 0 | 163 | | if (value < 99 || value > _helper.MaxYear) |
| | | 164 | | { |
| | 0 | 165 | | throw new ArgumentOutOfRangeException( |
| | 0 | 166 | | nameof(value), |
| | 0 | 167 | | value, |
| | 0 | 168 | | SR.Format(SR.ArgumentOutOfRange_Range, 99, _helper.MaxYear)); |
| | | 169 | | } |
| | | 170 | | |
| | 0 | 171 | | _twoDigitYearMax = value; |
| | 0 | 172 | | } |
| | | 173 | | } |
| | | 174 | | |
| | | 175 | | /// <summary> |
| | | 176 | | /// For Taiwan calendar, four digit year is not used. |
| | | 177 | | /// Therefore, for any two digit number, we just return the original number. |
| | | 178 | | /// </summary> |
| | | 179 | | |
| | | 180 | | public override int ToFourDigitYear(int year) |
| | | 181 | | { |
| | 0 | 182 | | ArgumentOutOfRangeException.ThrowIfNegativeOrZero(year); |
| | 0 | 183 | | ArgumentOutOfRangeException.ThrowIfGreaterThan(year, _helper.MaxYear); |
| | | 184 | | |
| | 0 | 185 | | return year; |
| | | 186 | | } |
| | | 187 | | } |
| | | 188 | | } |
| | | 189 | | |