1079 lines
46 KiB
JavaScript
1079 lines
46 KiB
JavaScript
define([
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'../ThirdParty/sprintf',
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'./binarySearch',
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'./defaultValue',
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'./defined',
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'./DeveloperError',
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'./GregorianDate',
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'./isLeapYear',
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'./LeapSecond',
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'./TimeConstants',
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'./TimeStandard'
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], function(
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sprintf,
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binarySearch,
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defaultValue,
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defined,
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DeveloperError,
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GregorianDate,
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isLeapYear,
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LeapSecond,
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TimeConstants,
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TimeStandard) {
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'use strict';
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var gregorianDateScratch = new GregorianDate();
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var daysInMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
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var daysInLeapFeburary = 29;
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function compareLeapSecondDates(leapSecond, dateToFind) {
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return JulianDate.compare(leapSecond.julianDate, dateToFind.julianDate);
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}
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// we don't really need a leap second instance, anything with a julianDate property will do
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var binarySearchScratchLeapSecond = new LeapSecond();
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function convertUtcToTai(julianDate) {
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//Even though julianDate is in UTC, we'll treat it as TAI and
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//search the leap second table for it.
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binarySearchScratchLeapSecond.julianDate = julianDate;
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var leapSeconds = JulianDate.leapSeconds;
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var index = binarySearch(leapSeconds, binarySearchScratchLeapSecond, compareLeapSecondDates);
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if (index < 0) {
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index = ~index;
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}
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if (index >= leapSeconds.length) {
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index = leapSeconds.length - 1;
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}
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var offset = leapSeconds[index].offset;
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if (index > 0) {
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//Now we have the index of the closest leap second that comes on or after our UTC time.
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//However, if the difference between the UTC date being converted and the TAI
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//defined leap second is greater than the offset, we are off by one and need to use
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//the previous leap second.
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var difference = JulianDate.secondsDifference(leapSeconds[index].julianDate, julianDate);
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if (difference > offset) {
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index--;
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offset = leapSeconds[index].offset;
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}
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}
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JulianDate.addSeconds(julianDate, offset, julianDate);
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}
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function convertTaiToUtc(julianDate, result) {
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binarySearchScratchLeapSecond.julianDate = julianDate;
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var leapSeconds = JulianDate.leapSeconds;
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var index = binarySearch(leapSeconds, binarySearchScratchLeapSecond, compareLeapSecondDates);
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if (index < 0) {
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index = ~index;
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}
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//All times before our first leap second get the first offset.
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if (index === 0) {
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return JulianDate.addSeconds(julianDate, -leapSeconds[0].offset, result);
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}
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//All times after our leap second get the last offset.
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if (index >= leapSeconds.length) {
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return JulianDate.addSeconds(julianDate, -leapSeconds[index - 1].offset, result);
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}
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//Compute the difference between the found leap second and the time we are converting.
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var difference = JulianDate.secondsDifference(leapSeconds[index].julianDate, julianDate);
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if (difference === 0) {
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//The date is in our leap second table.
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return JulianDate.addSeconds(julianDate, -leapSeconds[index].offset, result);
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}
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if (difference <= 1.0) {
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//The requested date is during the moment of a leap second, then we cannot convert to UTC
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return undefined;
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}
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//The time is in between two leap seconds, index is the leap second after the date
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//we're converting, so we subtract one to get the correct LeapSecond instance.
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return JulianDate.addSeconds(julianDate, -leapSeconds[--index].offset, result);
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}
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function setComponents(wholeDays, secondsOfDay, julianDate) {
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var extraDays = (secondsOfDay / TimeConstants.SECONDS_PER_DAY) | 0;
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wholeDays += extraDays;
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secondsOfDay -= TimeConstants.SECONDS_PER_DAY * extraDays;
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if (secondsOfDay < 0) {
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wholeDays--;
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secondsOfDay += TimeConstants.SECONDS_PER_DAY;
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}
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julianDate.dayNumber = wholeDays;
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julianDate.secondsOfDay = secondsOfDay;
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return julianDate;
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}
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function computeJulianDateComponents(year, month, day, hour, minute, second, millisecond) {
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// Algorithm from page 604 of the Explanatory Supplement to the
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// Astronomical Almanac (Seidelmann 1992).
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var a = ((month - 14) / 12) | 0;
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var b = year + 4800 + a;
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var dayNumber = (((1461 * b) / 4) | 0) + (((367 * (month - 2 - 12 * a)) / 12) | 0) - (((3 * (((b + 100) / 100) | 0)) / 4) | 0) + day - 32075;
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// JulianDates are noon-based
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hour = hour - 12;
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if (hour < 0) {
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hour += 24;
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}
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var secondsOfDay = second + ((hour * TimeConstants.SECONDS_PER_HOUR) + (minute * TimeConstants.SECONDS_PER_MINUTE) + (millisecond * TimeConstants.SECONDS_PER_MILLISECOND));
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if (secondsOfDay >= 43200.0) {
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dayNumber -= 1;
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}
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return [dayNumber, secondsOfDay];
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}
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//Regular expressions used for ISO8601 date parsing.
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//YYYY
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var matchCalendarYear = /^(\d{4})$/;
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//YYYY-MM (YYYYMM is invalid)
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var matchCalendarMonth = /^(\d{4})-(\d{2})$/;
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//YYYY-DDD or YYYYDDD
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var matchOrdinalDate = /^(\d{4})-?(\d{3})$/;
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//YYYY-Www or YYYYWww or YYYY-Www-D or YYYYWwwD
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var matchWeekDate = /^(\d{4})-?W(\d{2})-?(\d{1})?$/;
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//YYYY-MM-DD or YYYYMMDD
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var matchCalendarDate = /^(\d{4})-?(\d{2})-?(\d{2})$/;
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// Match utc offset
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var utcOffset = /([Z+\-])?(\d{2})?:?(\d{2})?$/;
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// Match hours HH or HH.xxxxx
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var matchHours = /^(\d{2})(\.\d+)?/.source + utcOffset.source;
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// Match hours/minutes HH:MM HHMM.xxxxx
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var matchHoursMinutes = /^(\d{2}):?(\d{2})(\.\d+)?/.source + utcOffset.source;
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// Match hours/minutes HH:MM:SS HHMMSS.xxxxx
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var matchHoursMinutesSeconds = /^(\d{2}):?(\d{2}):?(\d{2})(\.\d+)?/.source + utcOffset.source;
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var iso8601ErrorMessage = 'Invalid ISO 8601 date.';
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/**
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* Represents an astronomical Julian date, which is the number of days since noon on January 1, -4712 (4713 BC).
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* For increased precision, this class stores the whole number part of the date and the seconds
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* part of the date in separate components. In order to be safe for arithmetic and represent
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* leap seconds, the date is always stored in the International Atomic Time standard
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* {@link TimeStandard.TAI}.
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* @alias JulianDate
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* @constructor
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*
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* @param {Number} [julianDayNumber=0.0] The Julian Day Number representing the number of whole days. Fractional days will also be handled correctly.
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* @param {Number} [secondsOfDay=0.0] The number of seconds into the current Julian Day Number. Fractional seconds, negative seconds and seconds greater than a day will be handled correctly.
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* @param {TimeStandard} [timeStandard=TimeStandard.UTC] The time standard in which the first two parameters are defined.
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*/
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function JulianDate(julianDayNumber, secondsOfDay, timeStandard) {
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/**
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* Gets or sets the number of whole days.
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* @type {Number}
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*/
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this.dayNumber = undefined;
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/**
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* Gets or sets the number of seconds into the current day.
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* @type {Number}
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*/
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this.secondsOfDay = undefined;
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julianDayNumber = defaultValue(julianDayNumber, 0.0);
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secondsOfDay = defaultValue(secondsOfDay, 0.0);
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timeStandard = defaultValue(timeStandard, TimeStandard.UTC);
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//If julianDayNumber is fractional, make it an integer and add the number of seconds the fraction represented.
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var wholeDays = julianDayNumber | 0;
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secondsOfDay = secondsOfDay + (julianDayNumber - wholeDays) * TimeConstants.SECONDS_PER_DAY;
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setComponents(wholeDays, secondsOfDay, this);
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if (timeStandard === TimeStandard.UTC) {
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convertUtcToTai(this);
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}
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}
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/**
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* Creates a new instance from a GregorianDate.
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*
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* @param {GregorianDate} date A GregorianDate.
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* @param {JulianDate} [result] An existing instance to use for the result.
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* @returns {JulianDate} The modified result parameter or a new instance if none was provided.
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*
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* @exception {DeveloperError} date must be a valid GregorianDate.
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*/
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JulianDate.fromGregorianDate = function(date, result) {
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//>>includeStart('debug', pragmas.debug);
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if (!(date instanceof GregorianDate)) {
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throw new DeveloperError('date must be a valid GregorianDate.');
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}
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//>>includeEnd('debug');
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var components = computeJulianDateComponents(date.year, date.month, date.day, date.hour, date.minute, date.second, date.millisecond);
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if (!defined(result)) {
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return new JulianDate(components[0], components[1], TimeStandard.UTC);
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}
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setComponents(components[0], components[1], result);
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convertUtcToTai(result);
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return result;
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};
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/**
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* Creates a new instance from a JavaScript Date.
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*
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* @param {Date} date A JavaScript Date.
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* @param {JulianDate} [result] An existing instance to use for the result.
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* @returns {JulianDate} The modified result parameter or a new instance if none was provided.
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*
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* @exception {DeveloperError} date must be a valid JavaScript Date.
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*/
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JulianDate.fromDate = function(date, result) {
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//>>includeStart('debug', pragmas.debug);
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if (!(date instanceof Date) || isNaN(date.getTime())) {
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throw new DeveloperError('date must be a valid JavaScript Date.');
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}
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//>>includeEnd('debug');
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var components = computeJulianDateComponents(date.getUTCFullYear(), date.getUTCMonth() + 1, date.getUTCDate(), date.getUTCHours(), date.getUTCMinutes(), date.getUTCSeconds(), date.getUTCMilliseconds());
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if (!defined(result)) {
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return new JulianDate(components[0], components[1], TimeStandard.UTC);
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}
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setComponents(components[0], components[1], result);
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convertUtcToTai(result);
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return result;
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};
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/**
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* Creates a new instance from a from an {@link http://en.wikipedia.org/wiki/ISO_8601|ISO 8601} date.
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* This method is superior to <code>Date.parse</code> because it will handle all valid formats defined by the ISO 8601
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* specification, including leap seconds and sub-millisecond times, which discarded by most JavaScript implementations.
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*
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* @param {String} iso8601String An ISO 8601 date.
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* @param {JulianDate} [result] An existing instance to use for the result.
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* @returns {JulianDate} The modified result parameter or a new instance if none was provided.
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*
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* @exception {DeveloperError} Invalid ISO 8601 date.
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*/
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JulianDate.fromIso8601 = function(iso8601String, result) {
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//>>includeStart('debug', pragmas.debug);
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if (typeof iso8601String !== 'string') {
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throw new DeveloperError(iso8601ErrorMessage);
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}
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//>>includeEnd('debug');
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//Comma and decimal point both indicate a fractional number according to ISO 8601,
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//start out by blanket replacing , with . which is the only valid such symbol in JS.
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iso8601String = iso8601String.replace(',', '.');
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//Split the string into its date and time components, denoted by a mandatory T
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var tokens = iso8601String.split('T');
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var year;
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var month = 1;
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var day = 1;
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var hour = 0;
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var minute = 0;
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var second = 0;
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var millisecond = 0;
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//Lacking a time is okay, but a missing date is illegal.
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var date = tokens[0];
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var time = tokens[1];
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var tmp;
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var inLeapYear;
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//>>includeStart('debug', pragmas.debug);
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if (!defined(date)) {
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throw new DeveloperError(iso8601ErrorMessage);
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}
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var dashCount;
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//>>includeEnd('debug');
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//First match the date against possible regular expressions.
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tokens = date.match(matchCalendarDate);
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if (tokens !== null) {
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//>>includeStart('debug', pragmas.debug);
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dashCount = date.split('-').length - 1;
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if (dashCount > 0 && dashCount !== 2) {
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throw new DeveloperError(iso8601ErrorMessage);
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}
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//>>includeEnd('debug');
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year = +tokens[1];
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month = +tokens[2];
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day = +tokens[3];
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} else {
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tokens = date.match(matchCalendarMonth);
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if (tokens !== null) {
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year = +tokens[1];
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month = +tokens[2];
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} else {
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tokens = date.match(matchCalendarYear);
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if (tokens !== null) {
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year = +tokens[1];
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} else {
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//Not a year/month/day so it must be an ordinal date.
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var dayOfYear;
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tokens = date.match(matchOrdinalDate);
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if (tokens !== null) {
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year = +tokens[1];
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dayOfYear = +tokens[2];
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inLeapYear = isLeapYear(year);
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//This validation is only applicable for this format.
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//>>includeStart('debug', pragmas.debug);
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if (dayOfYear < 1 || (inLeapYear && dayOfYear > 366) || (!inLeapYear && dayOfYear > 365)) {
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throw new DeveloperError(iso8601ErrorMessage);
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}
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//>>includeEnd('debug')
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} else {
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tokens = date.match(matchWeekDate);
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if (tokens !== null) {
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//ISO week date to ordinal date from
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//http://en.wikipedia.org/w/index.php?title=ISO_week_date&oldid=474176775
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year = +tokens[1];
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var weekNumber = +tokens[2];
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var dayOfWeek = +tokens[3] || 0;
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//>>includeStart('debug', pragmas.debug);
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dashCount = date.split('-').length - 1;
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if (dashCount > 0 &&
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((!defined(tokens[3]) && dashCount !== 1) ||
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(defined(tokens[3]) && dashCount !== 2))) {
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throw new DeveloperError(iso8601ErrorMessage);
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}
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//>>includeEnd('debug')
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var january4 = new Date(Date.UTC(year, 0, 4));
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dayOfYear = (weekNumber * 7) + dayOfWeek - january4.getUTCDay() - 3;
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} else {
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//None of our regular expressions succeeded in parsing the date properly.
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//>>includeStart('debug', pragmas.debug);
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throw new DeveloperError(iso8601ErrorMessage);
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//>>includeEnd('debug')
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}
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}
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//Split an ordinal date into month/day.
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tmp = new Date(Date.UTC(year, 0, 1));
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tmp.setUTCDate(dayOfYear);
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month = tmp.getUTCMonth() + 1;
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day = tmp.getUTCDate();
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}
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}
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}
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//Now that we have all of the date components, validate them to make sure nothing is out of range.
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inLeapYear = isLeapYear(year);
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//>>includeStart('debug', pragmas.debug);
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if (month < 1 || month > 12 || day < 1 || ((month !== 2 || !inLeapYear) && day > daysInMonth[month - 1]) || (inLeapYear && month === 2 && day > daysInLeapFeburary)) {
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throw new DeveloperError(iso8601ErrorMessage);
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}
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//>>includeEnd('debug')
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//Now move onto the time string, which is much simpler.
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//If no time is specified, it is considered the beginning of the day, UTC to match Javascript's implementation.
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var offsetIndex;
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if (defined(time)) {
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tokens = time.match(matchHoursMinutesSeconds);
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if (tokens !== null) {
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//>>includeStart('debug', pragmas.debug);
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dashCount = time.split(':').length - 1;
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if (dashCount > 0 && dashCount !== 2 && dashCount !== 3) {
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throw new DeveloperError(iso8601ErrorMessage);
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}
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//>>includeEnd('debug')
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hour = +tokens[1];
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minute = +tokens[2];
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second = +tokens[3];
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millisecond = +(tokens[4] || 0) * 1000.0;
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offsetIndex = 5;
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} else {
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tokens = time.match(matchHoursMinutes);
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if (tokens !== null) {
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//>>includeStart('debug', pragmas.debug);
|
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dashCount = time.split(':').length - 1;
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if (dashCount > 2) {
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throw new DeveloperError(iso8601ErrorMessage);
|
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}
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//>>includeEnd('debug')
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|
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hour = +tokens[1];
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minute = +tokens[2];
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second = +(tokens[3] || 0) * 60.0;
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offsetIndex = 4;
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} else {
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tokens = time.match(matchHours);
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if (tokens !== null) {
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hour = +tokens[1];
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minute = +(tokens[2] || 0) * 60.0;
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offsetIndex = 3;
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} else {
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//>>includeStart('debug', pragmas.debug);
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throw new DeveloperError(iso8601ErrorMessage);
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//>>includeEnd('debug')
|
|
}
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|
}
|
|
}
|
|
|
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//Validate that all values are in proper range. Minutes and hours have special cases at 60 and 24.
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|
//>>includeStart('debug', pragmas.debug);
|
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if (minute >= 60 || second >= 61 || hour > 24 || (hour === 24 && (minute > 0 || second > 0 || millisecond > 0))) {
|
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throw new DeveloperError(iso8601ErrorMessage);
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
//Check the UTC offset value, if no value exists, use local time
|
|
//a Z indicates UTC, + or - are offsets.
|
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var offset = tokens[offsetIndex];
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var offsetHours = +(tokens[offsetIndex + 1]);
|
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var offsetMinutes = +(tokens[offsetIndex + 2] || 0);
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switch (offset) {
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case '+':
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hour = hour - offsetHours;
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minute = minute - offsetMinutes;
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break;
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case '-':
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hour = hour + offsetHours;
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minute = minute + offsetMinutes;
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break;
|
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case 'Z':
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break;
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default:
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minute = minute + new Date(Date.UTC(year, month - 1, day, hour, minute)).getTimezoneOffset();
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break;
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}
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}
|
|
|
|
//ISO8601 denotes a leap second by any time having a seconds component of 60 seconds.
|
|
//If that's the case, we need to temporarily subtract a second in order to build a UTC date.
|
|
//Then we add it back in after converting to TAI.
|
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var isLeapSecond = second === 60;
|
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if (isLeapSecond) {
|
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second--;
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}
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|
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//Even if we successfully parsed the string into its components, after applying UTC offset or
|
|
//special cases like 24:00:00 denoting midnight, we need to normalize the data appropriately.
|
|
|
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//milliseconds can never be greater than 1000, and seconds can't be above 60, so we start with minutes
|
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while (minute >= 60) {
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minute -= 60;
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hour++;
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}
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|
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while (hour >= 24) {
|
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hour -= 24;
|
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day++;
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}
|
|
|
|
tmp = (inLeapYear && month === 2) ? daysInLeapFeburary : daysInMonth[month - 1];
|
|
while (day > tmp) {
|
|
day -= tmp;
|
|
month++;
|
|
|
|
if (month > 12) {
|
|
month -= 12;
|
|
year++;
|
|
}
|
|
|
|
tmp = (inLeapYear && month === 2) ? daysInLeapFeburary : daysInMonth[month - 1];
|
|
}
|
|
|
|
//If UTC offset is at the beginning/end of the day, minutes can be negative.
|
|
while (minute < 0) {
|
|
minute += 60;
|
|
hour--;
|
|
}
|
|
|
|
while (hour < 0) {
|
|
hour += 24;
|
|
day--;
|
|
}
|
|
|
|
while (day < 1) {
|
|
month--;
|
|
if (month < 1) {
|
|
month += 12;
|
|
year--;
|
|
}
|
|
|
|
tmp = (inLeapYear && month === 2) ? daysInLeapFeburary : daysInMonth[month - 1];
|
|
day += tmp;
|
|
}
|
|
|
|
//Now create the JulianDate components from the Gregorian date and actually create our instance.
|
|
var components = computeJulianDateComponents(year, month, day, hour, minute, second, millisecond);
|
|
|
|
if (!defined(result)) {
|
|
result = new JulianDate(components[0], components[1], TimeStandard.UTC);
|
|
} else {
|
|
setComponents(components[0], components[1], result);
|
|
convertUtcToTai(result);
|
|
}
|
|
|
|
//If we were on a leap second, add it back.
|
|
if (isLeapSecond) {
|
|
JulianDate.addSeconds(result, 1, result);
|
|
}
|
|
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Creates a new instance that represents the current system time.
|
|
* This is equivalent to calling <code>JulianDate.fromDate(new Date());</code>.
|
|
*
|
|
* @param {JulianDate} [result] An existing instance to use for the result.
|
|
* @returns {JulianDate} The modified result parameter or a new instance if none was provided.
|
|
*/
|
|
JulianDate.now = function(result) {
|
|
return JulianDate.fromDate(new Date(), result);
|
|
};
|
|
|
|
var toGregorianDateScratch = new JulianDate(0, 0, TimeStandard.TAI);
|
|
|
|
/**
|
|
* Creates a {@link GregorianDate} from the provided instance.
|
|
*
|
|
* @param {JulianDate} julianDate The date to be converted.
|
|
* @param {GregorianDate} [result] An existing instance to use for the result.
|
|
* @returns {GregorianDate} The modified result parameter or a new instance if none was provided.
|
|
*/
|
|
JulianDate.toGregorianDate = function(julianDate, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(julianDate)) {
|
|
throw new DeveloperError('julianDate is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
var isLeapSecond = false;
|
|
var thisUtc = convertTaiToUtc(julianDate, toGregorianDateScratch);
|
|
if (!defined(thisUtc)) {
|
|
//Conversion to UTC will fail if we are during a leap second.
|
|
//If that's the case, subtract a second and convert again.
|
|
//JavaScript doesn't support leap seconds, so this results in second 59 being repeated twice.
|
|
JulianDate.addSeconds(julianDate, -1, toGregorianDateScratch);
|
|
thisUtc = convertTaiToUtc(toGregorianDateScratch, toGregorianDateScratch);
|
|
isLeapSecond = true;
|
|
}
|
|
|
|
var julianDayNumber = thisUtc.dayNumber;
|
|
var secondsOfDay = thisUtc.secondsOfDay;
|
|
|
|
if (secondsOfDay >= 43200.0) {
|
|
julianDayNumber += 1;
|
|
}
|
|
|
|
// Algorithm from page 604 of the Explanatory Supplement to the
|
|
// Astronomical Almanac (Seidelmann 1992).
|
|
var L = (julianDayNumber + 68569) | 0;
|
|
var N = (4 * L / 146097) | 0;
|
|
L = (L - (((146097 * N + 3) / 4) | 0)) | 0;
|
|
var I = ((4000 * (L + 1)) / 1461001) | 0;
|
|
L = (L - (((1461 * I) / 4) | 0) + 31) | 0;
|
|
var J = ((80 * L) / 2447) | 0;
|
|
var day = (L - (((2447 * J) / 80) | 0)) | 0;
|
|
L = (J / 11) | 0;
|
|
var month = (J + 2 - 12 * L) | 0;
|
|
var year = (100 * (N - 49) + I + L) | 0;
|
|
|
|
var hour = (secondsOfDay / TimeConstants.SECONDS_PER_HOUR) | 0;
|
|
var remainingSeconds = secondsOfDay - (hour * TimeConstants.SECONDS_PER_HOUR);
|
|
var minute = (remainingSeconds / TimeConstants.SECONDS_PER_MINUTE) | 0;
|
|
remainingSeconds = remainingSeconds - (minute * TimeConstants.SECONDS_PER_MINUTE);
|
|
var second = remainingSeconds | 0;
|
|
var millisecond = ((remainingSeconds - second) / TimeConstants.SECONDS_PER_MILLISECOND);
|
|
|
|
// JulianDates are noon-based
|
|
hour += 12;
|
|
if (hour > 23) {
|
|
hour -= 24;
|
|
}
|
|
|
|
//If we were on a leap second, add it back.
|
|
if (isLeapSecond) {
|
|
second += 1;
|
|
}
|
|
|
|
if (!defined(result)) {
|
|
return new GregorianDate(year, month, day, hour, minute, second, millisecond, isLeapSecond);
|
|
}
|
|
|
|
result.year = year;
|
|
result.month = month;
|
|
result.day = day;
|
|
result.hour = hour;
|
|
result.minute = minute;
|
|
result.second = second;
|
|
result.millisecond = millisecond;
|
|
result.isLeapSecond = isLeapSecond;
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Creates a JavaScript Date from the provided instance.
|
|
* Since JavaScript dates are only accurate to the nearest millisecond and
|
|
* cannot represent a leap second, consider using {@link JulianDate.toGregorianDate} instead.
|
|
* If the provided JulianDate is during a leap second, the previous second is used.
|
|
*
|
|
* @param {JulianDate} julianDate The date to be converted.
|
|
* @returns {Date} A new instance representing the provided date.
|
|
*/
|
|
JulianDate.toDate = function(julianDate) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(julianDate)) {
|
|
throw new DeveloperError('julianDate is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
var gDate = JulianDate.toGregorianDate(julianDate, gregorianDateScratch);
|
|
var second = gDate.second;
|
|
if (gDate.isLeapSecond) {
|
|
second -= 1;
|
|
}
|
|
return new Date(Date.UTC(gDate.year, gDate.month - 1, gDate.day, gDate.hour, gDate.minute, second, gDate.millisecond));
|
|
};
|
|
|
|
/**
|
|
* Creates an ISO8601 representation of the provided date.
|
|
*
|
|
* @param {JulianDate} julianDate The date to be converted.
|
|
* @param {Number} [precision] The number of fractional digits used to represent the seconds component. By default, the most precise representation is used.
|
|
* @returns {String} The ISO8601 representation of the provided date.
|
|
*/
|
|
JulianDate.toIso8601 = function(julianDate, precision) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(julianDate)) {
|
|
throw new DeveloperError('julianDate is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
var gDate = JulianDate.toGregorianDate(julianDate, gregorianDateScratch);
|
|
var year = gDate.year;
|
|
var month = gDate.month;
|
|
var day = gDate.day;
|
|
var hour = gDate.hour;
|
|
var minute = gDate.minute;
|
|
var second = gDate.second;
|
|
var millisecond = gDate.millisecond;
|
|
|
|
// special case - Iso8601.MAXIMUM_VALUE produces a string which we can't parse unless we adjust.
|
|
// 10000-01-01T00:00:00 is the same instant as 9999-12-31T24:00:00
|
|
if (year === 10000 && month === 1 && day === 1 && hour === 0 && minute === 0 && second === 0 && millisecond === 0) {
|
|
year = 9999;
|
|
month = 12;
|
|
day = 31;
|
|
hour = 24;
|
|
}
|
|
|
|
var millisecondStr;
|
|
|
|
if (!defined(precision) && millisecond !== 0) {
|
|
//Forces milliseconds into a number with at least 3 digits to whatever the default toString() precision is.
|
|
millisecondStr = (millisecond * 0.01).toString().replace('.', '');
|
|
return sprintf('%04d-%02d-%02dT%02d:%02d:%02d.%sZ', year, month, day, hour, minute, second, millisecondStr);
|
|
}
|
|
|
|
//Precision is either 0 or milliseconds is 0 with undefined precision, in either case, leave off milliseconds entirely
|
|
if (!defined(precision) || precision === 0) {
|
|
return sprintf('%04d-%02d-%02dT%02d:%02d:%02dZ', year, month, day, hour, minute, second);
|
|
}
|
|
|
|
//Forces milliseconds into a number with at least 3 digits to whatever the specified precision is.
|
|
millisecondStr = (millisecond * 0.01).toFixed(precision).replace('.', '').slice(0, precision);
|
|
return sprintf('%04d-%02d-%02dT%02d:%02d:%02d.%sZ', year, month, day, hour, minute, second, millisecondStr);
|
|
};
|
|
|
|
/**
|
|
* Duplicates a JulianDate instance.
|
|
*
|
|
* @param {JulianDate} julianDate The date to duplicate.
|
|
* @param {JulianDate} [result] An existing instance to use for the result.
|
|
* @returns {JulianDate} The modified result parameter or a new instance if none was provided. Returns undefined if julianDate is undefined.
|
|
*/
|
|
JulianDate.clone = function(julianDate, result) {
|
|
if (!defined(julianDate)) {
|
|
return undefined;
|
|
}
|
|
if (!defined(result)) {
|
|
return new JulianDate(julianDate.dayNumber, julianDate.secondsOfDay, TimeStandard.TAI);
|
|
}
|
|
result.dayNumber = julianDate.dayNumber;
|
|
result.secondsOfDay = julianDate.secondsOfDay;
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Compares two instances.
|
|
*
|
|
* @param {JulianDate} left The first instance.
|
|
* @param {JulianDate} right The second instance.
|
|
* @returns {Number} A negative value if left is less than right, a positive value if left is greater than right, or zero if left and right are equal.
|
|
*/
|
|
JulianDate.compare = function(left, right) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(left)) {
|
|
throw new DeveloperError('left is required.');
|
|
}
|
|
if (!defined(right)) {
|
|
throw new DeveloperError('right is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
var julianDayNumberDifference = left.dayNumber - right.dayNumber;
|
|
if (julianDayNumberDifference !== 0) {
|
|
return julianDayNumberDifference;
|
|
}
|
|
return left.secondsOfDay - right.secondsOfDay;
|
|
};
|
|
|
|
/**
|
|
* Compares two instances and returns <code>true</code> if they are equal, <code>false</code> otherwise.
|
|
*
|
|
* @param {JulianDate} [left] The first instance.
|
|
* @param {JulianDate} [right] The second instance.
|
|
* @returns {Boolean} <code>true</code> if the dates are equal; otherwise, <code>false</code>.
|
|
*/
|
|
JulianDate.equals = function(left, right) {
|
|
return (left === right) ||
|
|
(defined(left) &&
|
|
defined(right) &&
|
|
left.dayNumber === right.dayNumber &&
|
|
left.secondsOfDay === right.secondsOfDay);
|
|
};
|
|
|
|
/**
|
|
* Compares two instances and returns <code>true</code> if they are within <code>epsilon</code> seconds of
|
|
* each other. That is, in order for the dates to be considered equal (and for
|
|
* this function to return <code>true</code>), the absolute value of the difference between them, in
|
|
* seconds, must be less than <code>epsilon</code>.
|
|
*
|
|
* @param {JulianDate} [left] The first instance.
|
|
* @param {JulianDate} [right] The second instance.
|
|
* @param {Number} epsilon The maximum number of seconds that should separate the two instances.
|
|
* @returns {Boolean} <code>true</code> if the two dates are within <code>epsilon</code> seconds of each other; otherwise <code>false</code>.
|
|
*/
|
|
JulianDate.equalsEpsilon = function(left, right, epsilon) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(epsilon)) {
|
|
throw new DeveloperError('epsilon is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
return (left === right) ||
|
|
(defined(left) &&
|
|
defined(right) &&
|
|
Math.abs(JulianDate.secondsDifference(left, right)) <= epsilon);
|
|
};
|
|
|
|
/**
|
|
* Computes the total number of whole and fractional days represented by the provided instance.
|
|
*
|
|
* @param {JulianDate} julianDate The date.
|
|
* @returns {Number} The Julian date as single floating point number.
|
|
*/
|
|
JulianDate.totalDays = function(julianDate) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(julianDate)) {
|
|
throw new DeveloperError('julianDate is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
return julianDate.dayNumber + (julianDate.secondsOfDay / TimeConstants.SECONDS_PER_DAY);
|
|
};
|
|
|
|
/**
|
|
* Computes the difference in seconds between the provided instance.
|
|
*
|
|
* @param {JulianDate} left The first instance.
|
|
* @param {JulianDate} right The second instance.
|
|
* @returns {Number} The difference, in seconds, when subtracting <code>right</code> from <code>left</code>.
|
|
*/
|
|
JulianDate.secondsDifference = function(left, right) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(left)) {
|
|
throw new DeveloperError('left is required.');
|
|
}
|
|
if (!defined(right)) {
|
|
throw new DeveloperError('right is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
var dayDifference = (left.dayNumber - right.dayNumber) * TimeConstants.SECONDS_PER_DAY;
|
|
return (dayDifference + (left.secondsOfDay - right.secondsOfDay));
|
|
};
|
|
|
|
/**
|
|
* Computes the difference in days between the provided instance.
|
|
*
|
|
* @param {JulianDate} left The first instance.
|
|
* @param {JulianDate} right The second instance.
|
|
* @returns {Number} The difference, in days, when subtracting <code>right</code> from <code>left</code>.
|
|
*/
|
|
JulianDate.daysDifference = function(left, right) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(left)) {
|
|
throw new DeveloperError('left is required.');
|
|
}
|
|
if (!defined(right)) {
|
|
throw new DeveloperError('right is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
var dayDifference = (left.dayNumber - right.dayNumber);
|
|
var secondDifference = (left.secondsOfDay - right.secondsOfDay) / TimeConstants.SECONDS_PER_DAY;
|
|
return dayDifference + secondDifference;
|
|
};
|
|
|
|
/**
|
|
* Computes the number of seconds the provided instance is ahead of UTC.
|
|
*
|
|
* @param {JulianDate} julianDate The date.
|
|
* @returns {Number} The number of seconds the provided instance is ahead of UTC
|
|
*/
|
|
JulianDate.computeTaiMinusUtc = function(julianDate) {
|
|
binarySearchScratchLeapSecond.julianDate = julianDate;
|
|
var leapSeconds = JulianDate.leapSeconds;
|
|
var index = binarySearch(leapSeconds, binarySearchScratchLeapSecond, compareLeapSecondDates);
|
|
if (index < 0) {
|
|
index = ~index;
|
|
--index;
|
|
if (index < 0) {
|
|
index = 0;
|
|
}
|
|
}
|
|
return leapSeconds[index].offset;
|
|
};
|
|
|
|
/**
|
|
* Adds the provided number of seconds to the provided date instance.
|
|
*
|
|
* @param {JulianDate} julianDate The date.
|
|
* @param {Number} seconds The number of seconds to add or subtract.
|
|
* @param {JulianDate} result An existing instance to use for the result.
|
|
* @returns {JulianDate} The modified result parameter.
|
|
*/
|
|
JulianDate.addSeconds = function(julianDate, seconds, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(julianDate)) {
|
|
throw new DeveloperError('julianDate is required.');
|
|
}
|
|
if (!defined(seconds)) {
|
|
throw new DeveloperError('seconds is required.');
|
|
}
|
|
if (!defined(result)) {
|
|
throw new DeveloperError('result is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
return setComponents(julianDate.dayNumber, julianDate.secondsOfDay + seconds, result);
|
|
};
|
|
|
|
/**
|
|
* Adds the provided number of minutes to the provided date instance.
|
|
*
|
|
* @param {JulianDate} julianDate The date.
|
|
* @param {Number} minutes The number of minutes to add or subtract.
|
|
* @param {JulianDate} result An existing instance to use for the result.
|
|
* @returns {JulianDate} The modified result parameter.
|
|
*/
|
|
JulianDate.addMinutes = function(julianDate, minutes, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(julianDate)) {
|
|
throw new DeveloperError('julianDate is required.');
|
|
}
|
|
if (!defined(minutes)) {
|
|
throw new DeveloperError('minutes is required.');
|
|
}
|
|
if (!defined(result)) {
|
|
throw new DeveloperError('result is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
var newSecondsOfDay = julianDate.secondsOfDay + (minutes * TimeConstants.SECONDS_PER_MINUTE);
|
|
return setComponents(julianDate.dayNumber, newSecondsOfDay, result);
|
|
};
|
|
|
|
/**
|
|
* Adds the provided number of hours to the provided date instance.
|
|
*
|
|
* @param {JulianDate} julianDate The date.
|
|
* @param {Number} hours The number of hours to add or subtract.
|
|
* @param {JulianDate} result An existing instance to use for the result.
|
|
* @returns {JulianDate} The modified result parameter.
|
|
*/
|
|
JulianDate.addHours = function(julianDate, hours, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(julianDate)) {
|
|
throw new DeveloperError('julianDate is required.');
|
|
}
|
|
if (!defined(hours)) {
|
|
throw new DeveloperError('hours is required.');
|
|
}
|
|
if (!defined(result)) {
|
|
throw new DeveloperError('result is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
var newSecondsOfDay = julianDate.secondsOfDay + (hours * TimeConstants.SECONDS_PER_HOUR);
|
|
return setComponents(julianDate.dayNumber, newSecondsOfDay, result);
|
|
};
|
|
|
|
/**
|
|
* Adds the provided number of days to the provided date instance.
|
|
*
|
|
* @param {JulianDate} julianDate The date.
|
|
* @param {Number} days The number of days to add or subtract.
|
|
* @param {JulianDate} result An existing instance to use for the result.
|
|
* @returns {JulianDate} The modified result parameter.
|
|
*/
|
|
JulianDate.addDays = function(julianDate, days, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(julianDate)) {
|
|
throw new DeveloperError('julianDate is required.');
|
|
}
|
|
if (!defined(days)) {
|
|
throw new DeveloperError('days is required.');
|
|
}
|
|
if (!defined(result)) {
|
|
throw new DeveloperError('result is required.');
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
var newJulianDayNumber = julianDate.dayNumber + days;
|
|
return setComponents(newJulianDayNumber, julianDate.secondsOfDay, result);
|
|
};
|
|
|
|
/**
|
|
* Compares the provided instances and returns <code>true</code> if <code>left</code> is earlier than <code>right</code>, <code>false</code> otherwise.
|
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*
|
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* @param {JulianDate} left The first instance.
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|
* @param {JulianDate} right The second instance.
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* @returns {Boolean} <code>true</code> if <code>left</code> is earlier than <code>right</code>, <code>false</code> otherwise.
|
|
*/
|
|
JulianDate.lessThan = function(left, right) {
|
|
return JulianDate.compare(left, right) < 0;
|
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};
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|
|
|
/**
|
|
* Compares the provided instances and returns <code>true</code> if <code>left</code> is earlier than or equal to <code>right</code>, <code>false</code> otherwise.
|
|
*
|
|
* @param {JulianDate} left The first instance.
|
|
* @param {JulianDate} right The second instance.
|
|
* @returns {Boolean} <code>true</code> if <code>left</code> is earlier than or equal to <code>right</code>, <code>false</code> otherwise.
|
|
*/
|
|
JulianDate.lessThanOrEquals = function(left, right) {
|
|
return JulianDate.compare(left, right) <= 0;
|
|
};
|
|
|
|
/**
|
|
* Compares the provided instances and returns <code>true</code> if <code>left</code> is later than <code>right</code>, <code>false</code> otherwise.
|
|
*
|
|
* @param {JulianDate} left The first instance.
|
|
* @param {JulianDate} right The second instance.
|
|
* @returns {Boolean} <code>true</code> if <code>left</code> is later than <code>right</code>, <code>false</code> otherwise.
|
|
*/
|
|
JulianDate.greaterThan = function(left, right) {
|
|
return JulianDate.compare(left, right) > 0;
|
|
};
|
|
|
|
/**
|
|
* Compares the provided instances and returns <code>true</code> if <code>left</code> is later than or equal to <code>right</code>, <code>false</code> otherwise.
|
|
*
|
|
* @param {JulianDate} left The first instance.
|
|
* @param {JulianDate} right The second instance.
|
|
* @returns {Boolean} <code>true</code> if <code>left</code> is later than or equal to <code>right</code>, <code>false</code> otherwise.
|
|
*/
|
|
JulianDate.greaterThanOrEquals = function(left, right) {
|
|
return JulianDate.compare(left, right) >= 0;
|
|
};
|
|
|
|
/**
|
|
* Duplicates this instance.
|
|
*
|
|
* @param {JulianDate} [result] An existing instance to use for the result.
|
|
* @returns {JulianDate} The modified result parameter or a new instance if none was provided.
|
|
*/
|
|
JulianDate.prototype.clone = function(result) {
|
|
return JulianDate.clone(this, result);
|
|
};
|
|
|
|
/**
|
|
* Compares this and the provided instance and returns <code>true</code> if they are equal, <code>false</code> otherwise.
|
|
*
|
|
* @param {JulianDate} [right] The second instance.
|
|
* @returns {Boolean} <code>true</code> if the dates are equal; otherwise, <code>false</code>.
|
|
*/
|
|
JulianDate.prototype.equals = function(right) {
|
|
return JulianDate.equals(this, right);
|
|
};
|
|
|
|
/**
|
|
* Compares this and the provided instance and returns <code>true</code> if they are within <code>epsilon</code> seconds of
|
|
* each other. That is, in order for the dates to be considered equal (and for
|
|
* this function to return <code>true</code>), the absolute value of the difference between them, in
|
|
* seconds, must be less than <code>epsilon</code>.
|
|
*
|
|
* @param {JulianDate} [right] The second instance.
|
|
* @param {Number} epsilon The maximum number of seconds that should separate the two instances.
|
|
* @returns {Boolean} <code>true</code> if the two dates are within <code>epsilon</code> seconds of each other; otherwise <code>false</code>.
|
|
*/
|
|
JulianDate.prototype.equalsEpsilon = function(right, epsilon) {
|
|
return JulianDate.equalsEpsilon(this, right, epsilon);
|
|
};
|
|
|
|
/**
|
|
* Creates a string representing this date in ISO8601 format.
|
|
*
|
|
* @returns {String} A string representing this date in ISO8601 format.
|
|
*/
|
|
JulianDate.prototype.toString = function() {
|
|
return JulianDate.toIso8601(this);
|
|
};
|
|
|
|
/**
|
|
* Gets or sets the list of leap seconds used throughout Cesium.
|
|
* @memberof JulianDate
|
|
* @type {LeapSecond[]}
|
|
*/
|
|
JulianDate.leapSeconds = [
|
|
new LeapSecond(new JulianDate(2441317, 43210.0, TimeStandard.TAI), 10), // January 1, 1972 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2441499, 43211.0, TimeStandard.TAI), 11), // July 1, 1972 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2441683, 43212.0, TimeStandard.TAI), 12), // January 1, 1973 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2442048, 43213.0, TimeStandard.TAI), 13), // January 1, 1974 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2442413, 43214.0, TimeStandard.TAI), 14), // January 1, 1975 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2442778, 43215.0, TimeStandard.TAI), 15), // January 1, 1976 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2443144, 43216.0, TimeStandard.TAI), 16), // January 1, 1977 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2443509, 43217.0, TimeStandard.TAI), 17), // January 1, 1978 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2443874, 43218.0, TimeStandard.TAI), 18), // January 1, 1979 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2444239, 43219.0, TimeStandard.TAI), 19), // January 1, 1980 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2444786, 43220.0, TimeStandard.TAI), 20), // July 1, 1981 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2445151, 43221.0, TimeStandard.TAI), 21), // July 1, 1982 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2445516, 43222.0, TimeStandard.TAI), 22), // July 1, 1983 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2446247, 43223.0, TimeStandard.TAI), 23), // July 1, 1985 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2447161, 43224.0, TimeStandard.TAI), 24), // January 1, 1988 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2447892, 43225.0, TimeStandard.TAI), 25), // January 1, 1990 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2448257, 43226.0, TimeStandard.TAI), 26), // January 1, 1991 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2448804, 43227.0, TimeStandard.TAI), 27), // July 1, 1992 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2449169, 43228.0, TimeStandard.TAI), 28), // July 1, 1993 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2449534, 43229.0, TimeStandard.TAI), 29), // July 1, 1994 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2450083, 43230.0, TimeStandard.TAI), 30), // January 1, 1996 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2450630, 43231.0, TimeStandard.TAI), 31), // July 1, 1997 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2451179, 43232.0, TimeStandard.TAI), 32), // January 1, 1999 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2453736, 43233.0, TimeStandard.TAI), 33), // January 1, 2006 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2454832, 43234.0, TimeStandard.TAI), 34), // January 1, 2009 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2456109, 43235.0, TimeStandard.TAI), 35), // July 1, 2012 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2457204, 43236.0, TimeStandard.TAI), 36), // July 1, 2015 00:00:00 UTC
|
|
new LeapSecond(new JulianDate(2457754, 43237.0, TimeStandard.TAI), 37) // January 1, 2017 00:00:00 UTC
|
|
];
|
|
|
|
return JulianDate;
|
|
});
|