ngb-calendar-islamic-civil.js 20 KB

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  1. /**
  2. * @fileoverview added by tsickle
  3. * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
  4. */
  5. import { NgbCalendarHijri } from './ngb-calendar-hijri';
  6. import { NgbDate } from '../ngb-date';
  7. import { Injectable } from '@angular/core';
  8. /**
  9. * Checks if islamic year is a leap year
  10. * @param {?} hYear
  11. * @return {?}
  12. */
  13. function isIslamicLeapYear(hYear) {
  14. return (14 + 11 * hYear) % 30 < 11;
  15. }
  16. /**
  17. * Checks if gregorian years is a leap year
  18. * @param {?} gDate
  19. * @return {?}
  20. */
  21. function isGregorianLeapYear(gDate) {
  22. /** @type {?} */
  23. const year = gDate.getFullYear();
  24. return year % 4 === 0 && year % 100 !== 0 || year % 400 === 0;
  25. }
  26. /**
  27. * Returns the start of Hijri Month.
  28. * `hMonth` is 0 for Muharram, 1 for Safar, etc.
  29. * `hYear` is any Hijri hYear.
  30. * @param {?} hYear
  31. * @param {?} hMonth
  32. * @return {?}
  33. */
  34. function getIslamicMonthStart(hYear, hMonth) {
  35. return Math.ceil(29.5 * hMonth) + (hYear - 1) * 354 + Math.floor((3 + 11 * hYear) / 30.0);
  36. }
  37. /**
  38. * Returns the start of Hijri year.
  39. * `year` is any Hijri year.
  40. * @param {?} year
  41. * @return {?}
  42. */
  43. function getIslamicYearStart(year) {
  44. return (year - 1) * 354 + Math.floor((3 + 11 * year) / 30.0);
  45. }
  46. /**
  47. * @param {?} a
  48. * @param {?} b
  49. * @return {?}
  50. */
  51. function mod(a, b) {
  52. return a - b * Math.floor(a / b);
  53. }
  54. /**
  55. * The civil calendar is one type of Hijri calendars used in islamic countries.
  56. * Uses a fixed cycle of alternating 29- and 30-day months,
  57. * with a leap day added to the last month of 11 out of every 30 years.
  58. * http://cldr.unicode.org/development/development-process/design-proposals/islamic-calendar-types
  59. * All the calculations here are based on the equations from "Calendrical Calculations" By Edward M. Reingold, Nachum
  60. * Dershowitz.
  61. * @type {?}
  62. */
  63. const GREGORIAN_EPOCH = 1721425.5;
  64. /** @type {?} */
  65. const ISLAMIC_EPOCH = 1948439.5;
  66. export class NgbCalendarIslamicCivil extends NgbCalendarHijri {
  67. /**
  68. * Returns the equivalent islamic(civil) date value for a give input Gregorian date.
  69. * `gDate` is a JS Date to be converted to Hijri.
  70. * @param {?} gDate
  71. * @return {?}
  72. */
  73. fromGregorian(gDate) {
  74. /** @type {?} */
  75. const gYear = gDate.getFullYear();
  76. /** @type {?} */
  77. const gMonth = gDate.getMonth();
  78. /** @type {?} */
  79. const gDay = gDate.getDate();
  80. /** @type {?} */
  81. let julianDay = GREGORIAN_EPOCH - 1 + 365 * (gYear - 1) + Math.floor((gYear - 1) / 4) +
  82. -Math.floor((gYear - 1) / 100) + Math.floor((gYear - 1) / 400) +
  83. Math.floor((367 * (gMonth + 1) - 362) / 12 + (gMonth + 1 <= 2 ? 0 : isGregorianLeapYear(gDate) ? -1 : -2) + gDay);
  84. julianDay = Math.floor(julianDay) + 0.5;
  85. /** @type {?} */
  86. const days = julianDay - ISLAMIC_EPOCH;
  87. /** @type {?} */
  88. const hYear = Math.floor((30 * days + 10646) / 10631.0);
  89. /** @type {?} */
  90. let hMonth = Math.ceil((days - 29 - getIslamicYearStart(hYear)) / 29.5);
  91. hMonth = Math.min(hMonth, 11);
  92. /** @type {?} */
  93. const hDay = Math.ceil(days - getIslamicMonthStart(hYear, hMonth)) + 1;
  94. return new NgbDate(hYear, hMonth + 1, hDay);
  95. }
  96. /**
  97. * Returns the equivalent JS date value for a give input islamic(civil) date.
  98. * `hDate` is an islamic(civil) date to be converted to Gregorian.
  99. * @param {?} hDate
  100. * @return {?}
  101. */
  102. toGregorian(hDate) {
  103. /** @type {?} */
  104. const hYear = hDate.year;
  105. /** @type {?} */
  106. const hMonth = hDate.month - 1;
  107. /** @type {?} */
  108. const hDay = hDate.day;
  109. /** @type {?} */
  110. const julianDay = hDay + Math.ceil(29.5 * hMonth) + (hYear - 1) * 354 + Math.floor((3 + 11 * hYear) / 30) + ISLAMIC_EPOCH - 1;
  111. /** @type {?} */
  112. const wjd = Math.floor(julianDay - 0.5) + 0.5;
  113. /** @type {?} */
  114. const depoch = wjd - GREGORIAN_EPOCH;
  115. /** @type {?} */
  116. const quadricent = Math.floor(depoch / 146097);
  117. /** @type {?} */
  118. const dqc = mod(depoch, 146097);
  119. /** @type {?} */
  120. const cent = Math.floor(dqc / 36524);
  121. /** @type {?} */
  122. const dcent = mod(dqc, 36524);
  123. /** @type {?} */
  124. const quad = Math.floor(dcent / 1461);
  125. /** @type {?} */
  126. const dquad = mod(dcent, 1461);
  127. /** @type {?} */
  128. const yindex = Math.floor(dquad / 365);
  129. /** @type {?} */
  130. let year = quadricent * 400 + cent * 100 + quad * 4 + yindex;
  131. if (!(cent === 4 || yindex === 4)) {
  132. year++;
  133. }
  134. /** @type {?} */
  135. const gYearStart = GREGORIAN_EPOCH + 365 * (year - 1) + Math.floor((year - 1) / 4) - Math.floor((year - 1) / 100) +
  136. Math.floor((year - 1) / 400);
  137. /** @type {?} */
  138. const yearday = wjd - gYearStart;
  139. /** @type {?} */
  140. const tjd = GREGORIAN_EPOCH - 1 + 365 * (year - 1) + Math.floor((year - 1) / 4) - Math.floor((year - 1) / 100) +
  141. Math.floor((year - 1) / 400) + Math.floor(739 / 12 + (isGregorianLeapYear(new Date(year, 3, 1)) ? -1 : -2) + 1);
  142. /** @type {?} */
  143. const leapadj = wjd < tjd ? 0 : isGregorianLeapYear(new Date(year, 3, 1)) ? 1 : 2;
  144. /** @type {?} */
  145. const month = Math.floor(((yearday + leapadj) * 12 + 373) / 367);
  146. /** @type {?} */
  147. const tjd2 = GREGORIAN_EPOCH - 1 + 365 * (year - 1) + Math.floor((year - 1) / 4) - Math.floor((year - 1) / 100) +
  148. Math.floor((year - 1) / 400) +
  149. Math.floor((367 * month - 362) / 12 + (month <= 2 ? 0 : isGregorianLeapYear(new Date(year, month - 1, 1)) ? -1 : -2) +
  150. 1);
  151. /** @type {?} */
  152. const day = wjd - tjd2 + 1;
  153. return new Date(year, month - 1, day);
  154. }
  155. /**
  156. * Returns the number of days in a specific Hijri month.
  157. * `month` is 1 for Muharram, 2 for Safar, etc.
  158. * `year` is any Hijri year.
  159. * @param {?} month
  160. * @param {?} year
  161. * @return {?}
  162. */
  163. getDaysPerMonth(month, year) {
  164. year = year + Math.floor(month / 13);
  165. month = ((month - 1) % 12) + 1;
  166. /** @type {?} */
  167. let length = 29 + month % 2;
  168. if (month === 12 && isIslamicLeapYear(year)) {
  169. length++;
  170. }
  171. return length;
  172. }
  173. }
  174. NgbCalendarIslamicCivil.decorators = [
  175. { type: Injectable }
  176. ];
  177. //# 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{NgbCalendarHijri} from './ngb-calendar-hijri';\nimport {NgbDate} from '../ngb-date';\nimport {Injectable} from '@angular/core';\n\n/**\n * Checks if islamic year is a leap year\n */\nfunction isIslamicLeapYear(hYear: number): boolean {\n  return (14 + 11 * hYear) % 30 < 11;\n}\n\n/**\n * Checks if gregorian years is a leap year\n */\nfunction isGregorianLeapYear(gDate: Date): boolean {\n  const year = gDate.getFullYear();\n  return year % 4 === 0 && year % 100 !== 0 || year % 400 === 0;\n}\n\n/**\n * Returns the start of Hijri Month.\n * `hMonth` is 0 for Muharram, 1 for Safar, etc.\n * `hYear` is any Hijri hYear.\n */\nfunction getIslamicMonthStart(hYear: number, hMonth: number): number {\n  return Math.ceil(29.5 * hMonth) + (hYear - 1) * 354 + Math.floor((3 + 11 * hYear) / 30.0);\n}\n\n/**\n * Returns the start of Hijri year.\n * `year` is any Hijri year.\n */\nfunction getIslamicYearStart(year: number): number {\n  return (year - 1) * 354 + Math.floor((3 + 11 * year) / 30.0);\n}\n\nfunction mod(a: number, b: number): number {\n  return a - b * Math.floor(a / b);\n}\n\n/**\n * The civil calendar is one type of Hijri calendars used in islamic countries.\n * Uses a fixed cycle of alternating 29- and 30-day months,\n * with a leap day added to the last month of 11 out of every 30 years.\n * http://cldr.unicode.org/development/development-process/design-proposals/islamic-calendar-types\n * All the calculations here are based on the equations from \"Calendrical Calculations\" By Edward M. Reingold, Nachum\n * Dershowitz.\n */\n\nconst GREGORIAN_EPOCH = 1721425.5;\nconst ISLAMIC_EPOCH = 1948439.5;\n\n@Injectable()\nexport class NgbCalendarIslamicCivil extends NgbCalendarHijri {\n  /**\n   * Returns the equivalent islamic(civil) date value for a give input Gregorian date.\n   * `gDate` is a JS Date to be converted to Hijri.\n   */\n  fromGregorian(gDate: Date): NgbDate {\n    const gYear = gDate.getFullYear(), gMonth = gDate.getMonth(), gDay = gDate.getDate();\n\n    let julianDay = GREGORIAN_EPOCH - 1 + 365 * (gYear - 1) + Math.floor((gYear - 1) / 4) +\n        -Math.floor((gYear - 1) / 100) + Math.floor((gYear - 1) / 400) +\n        Math.floor(\n            (367 * (gMonth + 1) - 362) / 12 + (gMonth + 1 <= 2 ? 0 : isGregorianLeapYear(gDate) ? -1 : -2) + gDay);\n    julianDay = Math.floor(julianDay) + 0.5;\n\n    const days = julianDay - ISLAMIC_EPOCH;\n    const hYear = Math.floor((30 * days + 10646) / 10631.0);\n    let hMonth = Math.ceil((days - 29 - getIslamicYearStart(hYear)) / 29.5);\n    hMonth = Math.min(hMonth, 11);\n    const hDay = Math.ceil(days - getIslamicMonthStart(hYear, hMonth)) + 1;\n    return new NgbDate(hYear, hMonth + 1, hDay);\n  }\n\n  /**\n   * Returns the equivalent JS date value for a give input islamic(civil) date.\n   * `hDate` is an islamic(civil) date to be converted to Gregorian.\n   */\n  toGregorian(hDate: NgbDate): Date {\n    const hYear = hDate.year;\n    const hMonth = hDate.month - 1;\n    const hDay = hDate.day;\n    const julianDay =\n        hDay + Math.ceil(29.5 * hMonth) + (hYear - 1) * 354 + Math.floor((3 + 11 * hYear) / 30) + ISLAMIC_EPOCH - 1;\n\n    const wjd = Math.floor(julianDay - 0.5) + 0.5, depoch = wjd - GREGORIAN_EPOCH,\n          quadricent = Math.floor(depoch / 146097), dqc = mod(depoch, 146097), cent = Math.floor(dqc / 36524),\n          dcent = mod(dqc, 36524), quad = Math.floor(dcent / 1461), dquad = mod(dcent, 1461),\n          yindex = Math.floor(dquad / 365);\n    let year = quadricent * 400 + cent * 100 + quad * 4 + yindex;\n    if (!(cent === 4 || yindex === 4)) {\n      year++;\n    }\n\n    const gYearStart = GREGORIAN_EPOCH + 365 * (year - 1) + Math.floor((year - 1) / 4) - Math.floor((year - 1) / 100) +\n        Math.floor((year - 1) / 400);\n\n    const yearday = wjd - gYearStart;\n\n    const tjd = GREGORIAN_EPOCH - 1 + 365 * (year - 1) + Math.floor((year - 1) / 4) - Math.floor((year - 1) / 100) +\n        Math.floor((year - 1) / 400) + Math.floor(739 / 12 + (isGregorianLeapYear(new Date(year, 3, 1)) ? -1 : -2) + 1);\n\n    const leapadj = wjd < tjd ? 0 : isGregorianLeapYear(new Date(year, 3, 1)) ? 1 : 2;\n\n    const month = Math.floor(((yearday + leapadj) * 12 + 373) / 367);\n    const tjd2 = GREGORIAN_EPOCH - 1 + 365 * (year - 1) + Math.floor((year - 1) / 4) - Math.floor((year - 1) / 100) +\n        Math.floor((year - 1) / 400) +\n        Math.floor(\n            (367 * month - 362) / 12 + (month <= 2 ? 0 : isGregorianLeapYear(new Date(year, month - 1, 1)) ? -1 : -2) +\n            1);\n\n    const day = wjd - tjd2 + 1;\n\n    return new Date(year, month - 1, day);\n  }\n\n  /**\n   * Returns the number of days in a specific Hijri month.\n   * `month` is 1 for Muharram, 2 for Safar, etc.\n   * `year` is any Hijri year.\n   */\n  getDaysPerMonth(month: number, year: number): number {\n    year = year + Math.floor(month / 13);\n    month = ((month - 1) % 12) + 1;\n    let length = 29 + month % 2;\n    if (month === 12 && isIslamicLeapYear(year)) {\n      length++;\n    }\n    return length;\n  }\n}\n"]}