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// ----- // The `timezoneJS.Date` object gives you full-blown timezone support, independent from the timezone set on the end-user's machine running the browser. It uses the Olson zoneinfo files for its timezone data. // // The constructor function and setter methods use proxy JavaScript Date objects behind the scenes, so you can use strings like '10/22/2006' with the constructor. You also get the same sensible wraparound behavior with numeric parameters (like settings a value of 14 for the month wraps around to the next March). // // The other significant difference from the built-in JavaScript Date is that `timezoneJS.Date` also has named properties that store the values of year, month, date, etc., so it can be directly serialized to JSON and used for data transfer. /* * Copyright 2010 Matthew Eernisse (mde@fleegix.org) * and Open Source Applications Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * Credits: Ideas included from incomplete JS implementation of Olson * parser, "XMLDAte" by Philippe Goetz (philippe.goetz@wanadoo.fr) * * Contributions: * Jan Niehusmann * Ricky Romero * Preston Hunt (prestonhunt@gmail.com) * Dov. B Katz (dov.katz@morganstanley.com) * Peter Bergström (pbergstr@mac.com) * Long Ho */ (function () { // Standard initialization stuff to make sure the library is // usable on both client and server (node) side. var root = this; var timezoneJS; if (typeof exports !== 'undefined') { timezoneJS = exports; } else { timezoneJS = root.timezoneJS = {}; } timezoneJS.VERSION = '1.0.0'; // Grab the ajax library from global context. // This can be jQuery, Zepto or fleegix. // You can also specify your own transport mechanism by declaring // `timezoneJS.timezone.transport` to a `function`. More details will follow var $ = root.$ || root.jQuery || root.Zepto , fleegix = root.fleegix // Declare constant list of days and months. Unfortunately this doesn't leave room for i18n due to the Olson data being in English itself , DAYS = timezoneJS.Days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'] , MONTHS = timezoneJS.Months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'] , SHORT_MONTHS = {} , SHORT_DAYS = {} , EXACT_DATE_TIME = {} , TZ_REGEXP = new RegExp('^[a-zA-Z]+/'); //`{ "Jan": 0, "Feb": 1, "Mar": 2, "Apr": 3, "May": 4, "Jun": 5, "Jul": 6, "Aug": 7, "Sep": 8, "Oct": 9, "Nov": 10, "Dec": 11 }` for (var i = 0; i < MONTHS.length; i++) { SHORT_MONTHS[MONTHS[i].substr(0, 3)] = i; } //`{ "Sun": 0, "Mon": 1, "Tue": 2, "Wed": 3, "Thu": 4, "Fri": 5, "Sat": 6 }` for (i = 0; i < DAYS.length; i++) { SHORT_DAYS[DAYS[i].substr(0, 3)] = i; } //Handle array indexOf in IE if (!Array.prototype.indexOf) { Array.prototype.indexOf = function (el) { for (var i = 0; i < this.length; i++ ) { if (el === this[i]) return i; } return -1; } } // Format a number to the length = digits. For ex: // // `_fixWidth(2, 2) = '02'` // // `_fixWidth(1998, 2) = '98'` // // This is used to pad numbers in converting date to string in ISO standard. var _fixWidth = function (number, digits) { if (typeof number !== "number") { throw "not a number: " + number; } var s = number.toString(); if (number.length > digits) { return number.substr(number.length - digits, number.length); } while (s.length < digits) { s = '0' + s; } return s; }; // Abstraction layer for different transport layers, including fleegix/jQuery/Zepto // // Object `opts` include // // - `url`: url to ajax query // // - `async`: true for asynchronous, false otherwise. If false, return value will be response from URL. This is true by default // // - `success`: success callback function // // - `error`: error callback function // Returns response from URL if async is false, otherwise the AJAX request object itself var _transport = function (opts) { if ((!fleegix || typeof fleegix.xhr === 'undefined') && (!$ || typeof $.ajax === 'undefined')) { throw new Error('Please use the Fleegix.js XHR module, jQuery ajax, Zepto ajax, or define your own transport mechanism for downloading zone files.'); } if (!opts) return; if (!opts.url) throw new Error ('URL must be specified'); if (!('async' in opts)) opts.async = true; if (!opts.async) { return fleegix && fleegix.xhr ? fleegix.xhr.doReq({ url: opts.url, async: false }) : $.ajax({ url : opts.url, async : false }).responseText; } return fleegix && fleegix.xhr ? fleegix.xhr.send({ url : opts.url, method : 'get', handleSuccess : opts.success, handleErr : opts.error }) : $.ajax({ url : opts.url, dataType: 'text', method : 'GET', error : opts.error, success : opts.success }); }; // Constructor, which is similar to that of the native Date object itself timezoneJS.Date = function () { var args = Array.prototype.slice.apply(arguments) , dt = null , tz = null , arr = []; //We support several different constructors, including all the ones from `Date` object // with a timezone string at the end. // //- `[tz]`: Returns object with time in `tz` specified. // // - `utcMillis`, `[tz]`: Return object with UTC time = `utcMillis`, in `tz`. // // - `Date`, `[tz]`: Returns object with UTC time = `Date.getTime()`, in `tz`. // // - `year, month, [date,] [hours,] [minutes,] [seconds,] [millis,] [tz]: Same as `Date` object // with tz. // // - `Array`: Can be any combo of the above. // //If 1st argument is an array, we can use it as a list of arguments itself if (Object.prototype.toString.call(args[0]) === '[object Array]') { args = args[0]; } if (typeof args[args.length - 1] === 'string' && TZ_REGEXP.test(args[args.length - 1])) { tz = args.pop(); } switch (args.length) { case 0: dt = new Date(); break; case 1: dt = new Date(args[0]); break; default: for (var i = 0; i < 7; i++) { arr[i] = args[i] || 0; } dt = new Date(arr[0], arr[1], arr[2], arr[3], arr[4], arr[5], arr[6]); break; } this._useCache = false; this._tzInfo = {}; this._day = 0; this.year = 0; this.month = 0; this.date = 0; this.hours = 0; this.minutes = 0; this.seconds = 0; this.milliseconds = 0; this.timezone = tz || null; //Tricky part: // For the cases where there are 1/2 arguments: `timezoneJS.Date(millis, [tz])` and `timezoneJS.Date(Date, [tz])`. The // Date `dt` created should be in UTC. Thus the way I detect such cases is to determine if `arr` is not populated & `tz` // is specified. Because if `tz` is not specified, `dt` can be in local time. if (arr.length) { this.setFromDateObjProxy(dt); } else { this.setFromTimeProxy(dt.getTime(), tz); } }; // Implements most of the native Date object timezoneJS.Date.prototype = { getDate: function () { return this.date; }, getDay: function () { return this._day; }, getFullYear: function () { return this.year; }, getMonth: function () { return this.month; }, getYear: function () { return this.year; }, getHours: function () { return this.hours; }, getMilliseconds: function () { return this.milliseconds; }, getMinutes: function () { return this.minutes; }, getSeconds: function () { return this.seconds; }, getUTCDate: function () { return this.getUTCDateProxy().getUTCDate(); }, getUTCDay: function () { return this.getUTCDateProxy().getUTCDay(); }, getUTCFullYear: function () { return this.getUTCDateProxy().getUTCFullYear(); }, getUTCHours: function () { return this.getUTCDateProxy().getUTCHours(); }, getUTCMilliseconds: function () { return this.getUTCDateProxy().getUTCMilliseconds(); }, getUTCMinutes: function () { return this.getUTCDateProxy().getUTCMinutes(); }, getUTCMonth: function () { return this.getUTCDateProxy().getUTCMonth(); }, getUTCSeconds: function () { return this.getUTCDateProxy().getUTCSeconds(); }, // Time adjusted to user-specified timezone getTime: function () { return this._timeProxy + (this.getTimezoneOffset() * 60 * 1000); }, getTimezone: function () { return this.timezone; }, getTimezoneOffset: function () { return this.getTimezoneInfo().tzOffset; }, getTimezoneAbbreviation: function () { return this.getTimezoneInfo().tzAbbr; }, getTimezoneInfo: function () { if (this._useCache) return this._tzInfo; var res; // If timezone is specified, get the correct timezone info based on the Date given if (this.timezone) { res = this.timezone === 'Etc/UTC' || this.timezone === 'Etc/GMT' ? { tzOffset: 0, tzAbbr: 'UTC' } : timezoneJS.timezone.getTzInfo(this._timeProxy, this.timezone); } // If no timezone was specified, use the local browser offset else { res = { tzOffset: this.getLocalOffset(), tzAbbr: null }; } this._tzInfo = res; this._useCache = true; return res }, getUTCDateProxy: function () { var dt = new Date(this._timeProxy); dt.setUTCMinutes(dt.getUTCMinutes() + this.getTimezoneOffset()); return dt; }, setDate: function (n) { this.setAttribute('date', n); }, setFullYear: function (n) { this.setAttribute('year', n); }, setMonth: function (n) { this.setAttribute('month', n); }, setYear: function (n) { this.setUTCAttribute('year', n); }, setHours: function (n) { this.setAttribute('hours', n); }, setMilliseconds: function (n) { this.setAttribute('milliseconds', n); }, setMinutes: function (n) { this.setAttribute('minutes', n); }, setSeconds: function (n) { this.setAttribute('seconds', n); }, setTime: function (n) { if (isNaN(n)) { throw new Error('Units must be a number.'); } this.setFromTimeProxy(n, this.timezone); }, setUTCDate: function (n) { this.setUTCAttribute('date', n); }, setUTCFullYear: function (n) { this.setUTCAttribute('year', n); }, setUTCHours: function (n) { this.setUTCAttribute('hours', n); }, setUTCMilliseconds: function (n) { this.setUTCAttribute('milliseconds', n); }, setUTCMinutes: function (n) { this.setUTCAttribute('minutes', n); }, setUTCMonth: function (n) { this.setUTCAttribute('month', n); }, setUTCSeconds: function (n) { this.setUTCAttribute('seconds', n); }, setFromDateObjProxy: function (dt) { this.year = dt.getFullYear(); this.month = dt.getMonth(); this.date = dt.getDate(); this.hours = dt.getHours(); this.minutes = dt.getMinutes(); this.seconds = dt.getSeconds(); this.milliseconds = dt.getMilliseconds(); this._day = dt.getDay(); this._dateProxy = dt; this._timeProxy = Date.UTC(this.year, this.month, this.date, this.hours, this.minutes, this.seconds, this.milliseconds); this._useCache = false; }, setFromTimeProxy: function (utcMillis, tz) { var dt = new Date(utcMillis); var tzOffset; tzOffset = tz ? timezoneJS.timezone.getTzInfo(dt, tz).tzOffset : dt.getTimezoneOffset(); dt.setTime(utcMillis + (dt.getTimezoneOffset() - tzOffset) * 60000); this.setFromDateObjProxy(dt); }, setAttribute: function (unit, n) { if (isNaN(n)) { throw new Error('Units must be a number.'); } var dt = this._dateProxy; var meth = unit === 'year' ? 'FullYear' : unit.substr(0, 1).toUpperCase() + unit.substr(1); dt['set' + meth](n); this.setFromDateObjProxy(dt); }, setUTCAttribute: function (unit, n) { if (isNaN(n)) { throw new Error('Units must be a number.'); } var meth = unit === 'year' ? 'FullYear' : unit.substr(0, 1).toUpperCase() + unit.substr(1); var dt = this.getUTCDateProxy(); dt['setUTC' + meth](n); dt.setUTCMinutes(dt.getUTCMinutes() - this.getTimezoneOffset()); this.setFromTimeProxy(dt.getTime() + this.getTimezoneOffset() * 60000, this.timezone); }, setTimezone: function (tz) { var previousOffset = this.getTimezoneInfo().tzOffset; this.timezone = tz; this._useCache = false; // Set UTC minutes offsets by the delta of the two timezones this.setUTCMinutes(this.getUTCMinutes() - this.getTimezoneInfo().tzOffset + previousOffset); }, removeTimezone: function () { this.timezone = null; this._useCache = false; }, valueOf: function () { return this.getTime(); }, clone: function () { return this.timezone ? new timezoneJS.Date(this.getTime(), this.timezone) : new timezoneJS.Date(this.getTime()); }, toGMTString: function () { return this.toString('EEE, dd MMM yyyy HH:mm:ss Z', 'Etc/GMT'); }, toLocaleString: function () {}, toLocaleDateString: function () {}, toLocaleTimeString: function () {}, toSource: function () {}, toISOString: function () { return this.toString('yyyy-MM-ddTHH:mm:ss.SSS', 'Etc/UTC') + 'Z'; }, toJSON: function () { return this.toISOString(); }, // Allows different format following ISO8601 format: toString: function (format, tz) { // Default format is the same as toISOString if (!format) format = 'yyyy-MM-dd HH:mm:ss'; var result = format; var tzInfo = tz ? timezoneJS.timezone.getTzInfo(this.getTime(), tz) : this.getTimezoneInfo(); var _this = this; // If timezone is specified, get a clone of the current Date object and modify it if (tz) { _this = this.clone(); _this.setTimezone(tz); } var hours = _this.getHours(); return result // fix the same characters in Month names .replace(/a+/g, function () { return 'k'; }) // `y`: year .replace(/y+/g, function (token) { return _fixWidth(_this.getFullYear(), token.length); }) // `d`: date .replace(/d+/g, function (token) { return _fixWidth(_this.getDate(), token.length); }) // `m`: minute .replace(/m+/g, function (token) { return _fixWidth(_this.getMinutes(), token.length); }) // `s`: second .replace(/s+/g, function (token) { return _fixWidth(_this.getSeconds(), token.length); }) // `S`: millisecond .replace(/S+/g, function (token) { return _fixWidth(_this.getMilliseconds(), token.length); }) // `M`: month. Note: `MM` will be the numeric representation (e.g February is 02) but `MMM` will be text representation (e.g February is Feb) .replace(/M+/g, function (token) { var _month = _this.getMonth(), _len = token.length; if (_len > 3) { return timezoneJS.Months[_month]; } else if (_len > 2) { return timezoneJS.Months[_month].substring(0, _len); } return _fixWidth(_month + 1, _len); }) // `k`: AM/PM .replace(/k+/g, function () { if (hours >= 12) { if (hours > 12) { hours -= 12; } return 'PM'; } return 'AM'; }) // `H`: hour .replace(/H+/g, function (token) { return _fixWidth(hours, token.length); }) // `E`: day .replace(/E+/g, function (token) { return DAYS[_this.getDay()].substring(0, token.length); }) // `Z`: timezone abbreviation .replace(/Z+/gi, function () { return tzInfo.tzAbbr; }); }, toUTCString: function () { return this.toGMTString(); }, civilToJulianDayNumber: function (y, m, d) { var a; // Adjust for zero-based JS-style array m++; if (m > 12) { a = parseInt(m/12, 10); m = m % 12; y += a; } if (m <= 2) { y -= 1; m += 12; } a = Math.floor(y / 100); var b = 2 - a + Math.floor(a / 4) , jDt = Math.floor(365.25 * (y + 4716)) + Math.floor(30.6001 * (m + 1)) + d + b - 1524; return jDt; }, getLocalOffset: function () { return this._dateProxy.getTimezoneOffset(); } }; timezoneJS.timezone = new function () { var _this = this , regionMap = {'Etc':'etcetera','EST':'northamerica','MST':'northamerica','HST':'northamerica','EST5EDT':'northamerica','CST6CDT':'northamerica','MST7MDT':'northamerica','PST8PDT':'northamerica','America':'northamerica','Pacific':'australasia','Atlantic':'europe','Africa':'africa','Indian':'africa','Antarctica':'antarctica','Asia':'asia','Australia':'australasia','Europe':'europe','WET':'europe','CET':'europe','MET':'europe','EET':'europe'} , regionExceptions = {'Pacific/Honolulu':'northamerica','Atlantic/Bermuda':'northamerica','Atlantic/Cape_Verde':'africa','Atlantic/St_Helena':'africa','Indian/Kerguelen':'antarctica','Indian/Chagos':'asia','Indian/Maldives':'asia','Indian/Christmas':'australasia','Indian/Cocos':'australasia','America/Danmarkshavn':'europe','America/Scoresbysund':'europe','America/Godthab':'europe','America/Thule':'europe','Asia/Yekaterinburg':'europe','Asia/Omsk':'europe','Asia/Novosibirsk':'europe','Asia/Krasnoyarsk':'europe','Asia/Irkutsk':'europe','Asia/Yakutsk':'europe','Asia/Vladivostok':'europe','Asia/Sakhalin':'europe','Asia/Magadan':'europe','Asia/Kamchatka':'europe','Asia/Anadyr':'europe','Africa/Ceuta':'europe','America/Argentina/Buenos_Aires':'southamerica','America/Argentina/Cordoba':'southamerica','America/Argentina/Tucuman':'southamerica','America/Argentina/La_Rioja':'southamerica','America/Argentina/San_Juan':'southamerica','America/Argentina/Jujuy':'southamerica','America/Argentina/Catamarca':'southamerica','America/Argentina/Mendoza':'southamerica','America/Argentina/Rio_Gallegos':'southamerica','America/Argentina/Ushuaia':'southamerica','America/Aruba':'southamerica','America/La_Paz':'southamerica','America/Noronha':'southamerica','America/Belem':'southamerica','America/Fortaleza':'southamerica','America/Recife':'southamerica','America/Araguaina':'southamerica','America/Maceio':'southamerica','America/Bahia':'southamerica','America/Sao_Paulo':'southamerica','America/Campo_Grande':'southamerica','America/Cuiaba':'southamerica','America/Porto_Velho':'southamerica','America/Boa_Vista':'southamerica','America/Manaus':'southamerica','America/Eirunepe':'southamerica','America/Rio_Branco':'southamerica','America/Santiago':'southamerica','Pacific/Easter':'southamerica','America/Bogota':'southamerica','America/Curacao':'southamerica','America/Guayaquil':'southamerica','Pacific/Galapagos':'southamerica','Atlantic/Stanley':'southamerica','America/Cayenne':'southamerica','America/Guyana':'southamerica','America/Asuncion':'southamerica','America/Lima':'southamerica','Atlantic/South_Georgia':'southamerica','America/Paramaribo':'southamerica','America/Port_of_Spain':'southamerica','America/Montevideo':'southamerica','America/Caracas':'southamerica'}; function invalidTZError(t) { throw new Error('Timezone "' + t + '" is either incorrect, or not loaded in the timezone registry.'); } function builtInLoadZoneFile(fileName, opts) { var url = _this.zoneFileBasePath + '/' + fileName; return !opts || !opts.async ? _this.parseZones(_this.transport({ url : url, async : false })) : _this.transport({ async: true, url : url, success : function (str) { if (_this.parseZones(str) && typeof opts.callback === 'function') { opts.callback(); } return true; }, error : function () { throw new Error('Error retrieving "' + url + '" zoneinfo files'); } }); } function getRegionForTimezone(tz) { var exc = regionExceptions[tz] , reg , ret; if (exc) return exc; reg = tz.split('/')[0]; ret = regionMap[reg]; // If there's nothing listed in the main regions for this TZ, check the 'backward' links if (ret) return ret; var link = _this.zones[tz]; if (typeof link === 'string') { return getRegionForTimezone(link); } // Backward-compat file hasn't loaded yet, try looking in there if (!_this.loadedZones.backward) { // This is for obvious legacy zones (e.g., Iceland) that don't even have a prefix like "America/" that look like normal zones _this.loadZoneFile('backward'); return getRegionForTimezone(tz); } invalidTZError(tz); } function parseTimeString(str) { var pat = /(\d+)(?::0*(\d*))?(?::0*(\d*))?([wsugz])?$/; var hms = str.match(pat); hms[1] = parseInt(hms[1], 10); hms[2] = hms[2] ? parseInt(hms[2], 10) : 0; hms[3] = hms[3] ? parseInt(hms[3], 10) : 0; return hms; } function processZone(z) { if (!z[3]) { return; } var yea = parseInt(z[3], 10); var mon = 11; var dat = 31; if (z[4]) { mon = SHORT_MONTHS[z[4].substr(0, 3)]; dat = parseInt(z[5], 10) || 1; } var string = z[6] ? z[6] : '00:00:00' , t = parseTimeString(string); return [yea, mon, dat, t[1], t[2], t[3]]; } function getZone(dt, tz) { var utcMillis = typeof dt === 'number' ? dt : new Date(dt).getTime(); var t = tz; var zoneList = _this.zones[t]; // Follow links to get to an actual zone while (typeof zoneList === "string") { t = zoneList; zoneList = _this.zones[t]; } if (!zoneList) { // Backward-compat file hasn't loaded yet, try looking in there if (!_this.loadedZones.backward) { //This is for backward entries like "America/Fort_Wayne" that // getRegionForTimezone *thinks* it has a region file and zone // for (e.g., America => 'northamerica'), but in reality it's a // legacy zone we need the backward file for. _this.loadZoneFile('backward'); return getZone(dt, tz); } invalidTZError(t); } if (zoneList.length === 0) { throw new Error('No Zone found for "' + tz + '" on ' + dt); } //Do backwards lookup since most use cases deal with newer dates. for (var i = zoneList.length - 1; i >= 0; i--) { var z = zoneList[i]; if (z[3] && utcMillis > z[3]) break; } return zoneList[i+1]; } function getBasicOffset(time) { var off = parseTimeString(time) , adj = time.indexOf('-') === 0 ? -1 : 1; off = adj * (((off[1] * 60 + off[2]) * 60 + off[3]) * 1000); return off/60/1000; } //if isUTC is true, date is given in UTC, otherwise it's given // in local time (ie. date.getUTC*() returns local time components) function getRule(dt, zone, isUTC) { var date = typeof dt === 'number' ? new Date(dt) : dt; var ruleset = zone[1]; var basicOffset = zone[0]; //Convert a date to UTC. Depending on the 'type' parameter, the date // parameter may be: // // - `u`, `g`, `z`: already UTC (no adjustment). // // - `s`: standard time (adjust for time zone offset but not for DST) // // - `w`: wall clock time (adjust for both time zone and DST offset). // // DST adjustment is done using the rule given as third argument. var convertDateToUTC = function (date, type, rule) { var offset = 0; if (type === 'u' || type === 'g' || type === 'z') { // UTC offset = 0; } else if (type === 's') { // Standard Time offset = basicOffset; } else if (type === 'w' || !type) { // Wall Clock Time offset = getAdjustedOffset(basicOffset, rule); } else { throw("unknown type " + type); } offset *= 60 * 1000; // to millis return new Date(date.getTime() + offset); }; //Step 1: Find applicable rules for this year. // //Step 2: Sort the rules by effective date. // //Step 3: Check requested date to see if a rule has yet taken effect this year. If not, // //Step 4: Get the rules for the previous year. If there isn't an applicable rule for last year, then // there probably is no current time offset since they seem to explicitly turn off the offset // when someone stops observing DST. // // FIXME if this is not the case and we'll walk all the way back (ugh). // //Step 5: Sort the rules by effective date. //Step 6: Apply the most recent rule before the current time. var convertRuleToExactDateAndTime = function (yearAndRule, prevRule) { var year = yearAndRule[0] , rule = yearAndRule[1]; // Assume that the rule applies to the year of the given date. var hms = rule[5]; var effectiveDate; if (!EXACT_DATE_TIME[year]) EXACT_DATE_TIME[year] = {}; // Result for given parameters is already stored if (EXACT_DATE_TIME[year][rule]) effectiveDate = EXACT_DATE_TIME[year][rule]; else { //If we have a specific date, use that! if (!isNaN(rule[4])) { effectiveDate = new Date(Date.UTC(year, SHORT_MONTHS[rule[3]], rule[4], hms[1], hms[2], hms[3], 0)); } //Let's hunt for the date. else { var targetDay , operator; //Example: `lastThu` if (rule[4].substr(0, 4) === "last") { // Start at the last day of the month and work backward. effectiveDate = new Date(Date.UTC(year, SHORT_MONTHS[rule[3]] + 1, 1, hms[1] - 24, hms[2], hms[3], 0)); targetDay = SHORT_DAYS[rule[4].substr(4, 3)]; operator = "<="; } //Example: `Sun>=15` else { //Start at the specified date. effectiveDate = new Date(Date.UTC(year, SHORT_MONTHS[rule[3]], rule[4].substr(5), hms[1], hms[2], hms[3], 0)); targetDay = SHORT_DAYS[rule[4].substr(0, 3)]; operator = rule[4].substr(3, 2); } var ourDay = effectiveDate.getUTCDay(); //Go forwards. if (operator === ">=") { effectiveDate.setUTCDate(effectiveDate.getUTCDate() + (targetDay - ourDay + ((targetDay < ourDay) ? 7 : 0))); } //Go backwards. Looking for the last of a certain day, or operator is "<=" (less likely). else { effectiveDate.setUTCDate(effectiveDate.getUTCDate() + (targetDay - ourDay - ((targetDay > ourDay) ? 7 : 0))); } } EXACT_DATE_TIME[year][rule] = effectiveDate; } //If previous rule is given, correct for the fact that the starting time of the current // rule may be specified in local time. if (prevRule) { effectiveDate = convertDateToUTC(effectiveDate, hms[4], prevRule); } return effectiveDate; }; var findApplicableRules = function (year, ruleset) { var applicableRules = []; for (var i = 0; ruleset && i < ruleset.length; i++) { //Exclude future rules. if (ruleset[i][0] <= year && ( // Date is in a set range. ruleset[i][1] >= year || // Date is in an "only" year. (ruleset[i][0] === year && ruleset[i][1] === "only") || //We're in a range from the start year to infinity. ruleset[i][1] === "max" ) ) { //It's completely okay to have any number of matches here. // Normally we should only see two, but that doesn't preclude other numbers of matches. // These matches are applicable to this year. applicableRules.push([year, ruleset[i]]); } } return applicableRules; }; var compareDates = function (a, b, prev) { var year, rule; if (a.constructor !== Date) { year = a[0]; rule = a[1]; a = (!prev && EXACT_DATE_TIME[year] && EXACT_DATE_TIME[year][rule]) ? EXACT_DATE_TIME[year][rule] : convertRuleToExactDateAndTime(a, prev); } else if (prev) { a = convertDateToUTC(a, isUTC ? 'u' : 'w', prev); } if (b.constructor !== Date) { year = b[0]; rule = b[1]; b = (!prev && EXACT_DATE_TIME[year] && EXACT_DATE_TIME[year][rule]) ? EXACT_DATE_TIME[year][rule] : convertRuleToExactDateAndTime(b, prev); } else if (prev) { b = convertDateToUTC(b, isUTC ? 'u' : 'w', prev); } a = Number(a); b = Number(b); return a - b; }; var year = date.getUTCFullYear(); var applicableRules; applicableRules = findApplicableRules(year, _this.rules[ruleset]); applicableRules.push(date); //While sorting, the time zone in which the rule starting time is specified // is ignored. This is ok as long as the timespan between two DST changes is // larger than the DST offset, which is probably always true. // As the given date may indeed be close to a DST change, it may get sorted // to a wrong position (off by one), which is corrected below. applicableRules.sort(compareDates); //If there are not enough past DST rules... if (applicableRules.indexOf(date) < 2) { applicableRules = applicableRules.concat(findApplicableRules(year-1, _this.rules[ruleset])); applicableRules.sort(compareDates); } var pinpoint = applicableRules.indexOf(date); if (pinpoint > 1 && compareDates(date, applicableRules[pinpoint-1], applicableRules[pinpoint-2][1]) < 0) { //The previous rule does not really apply, take the one before that. return applicableRules[pinpoint - 2][1]; } else if (pinpoint > 0 && pinpoint < applicableRules.length - 1 && compareDates(date, applicableRules[pinpoint+1], applicableRules[pinpoint-1][1]) > 0) { //The next rule does already apply, take that one. return applicableRules[pinpoint + 1][1]; } else if (pinpoint === 0) { //No applicable rule found in this and in previous year. return null; } return applicableRules[pinpoint - 1][1]; } function getAdjustedOffset(off, rule) { return -Math.ceil(rule[6] - off); } function getAbbreviation(zone, rule) { var res; var base = zone[2]; if (base.indexOf('%s') > -1) { var repl; if (rule) { repl = rule[7] === '-' ? '' : rule[7]; } //FIXME: Right now just falling back to Standard -- // apparently ought to use the last valid rule, // although in practice that always ought to be Standard else { repl = 'S'; } res = base.replace('%s', repl); } else if (base.indexOf('/') > -1) { //Chose one of two alternative strings. res = base.split("/", 2)[rule[6] ? 1 : 0]; } else { res = base; } return res; } this.zoneFileBasePath; this.zoneFiles = ['africa', 'antarctica', 'asia', 'australasia', 'backward', 'etcetera', 'europe', 'northamerica', 'pacificnew', 'southamerica']; this.loadingSchemes = { PRELOAD_ALL: 'preloadAll', LAZY_LOAD: 'lazyLoad', MANUAL_LOAD: 'manualLoad' }; this.loadingScheme = this.loadingSchemes.LAZY_LOAD; this.loadedZones = {}; this.zones = {}; this.rules = {}; this.init = function (o) { var opts = { async: true } , def = this.defaultZoneFile = this.loadingScheme === this.loadingSchemes.PRELOAD_ALL ? this.zoneFiles : 'northamerica' , done = 0 , callbackFn; //Override default with any passed-in opts for (var p in o) { opts[p] = o[p]; } if (typeof def === 'string') { return this.loadZoneFile(def, opts); } //Wraps callback function in another one that makes // sure all files have been loaded. callbackFn = opts.callback; opts.callback = function () { done++; (done === def.length) && typeof callbackFn === 'function' && callbackFn(); }; for (var i = 0; i < def.length; i++) { this.loadZoneFile(def[i], opts); } }; //Get the zone files via XHR -- if the sync flag // is set to true, it's being called by the lazy-loading // mechanism, so the result needs to be returned inline. this.loadZoneFile = function (fileName, opts) { if (typeof this.zoneFileBasePath === 'undefined') { throw new Error('Please define a base path to your zone file directory -- timezoneJS.timezone.zoneFileBasePath.'); } //Ignore already loaded zones. if (this.loadedZones[fileName]) { return; } this.loadedZones[fileName] = true; return builtInLoadZoneFile(fileName, opts); }; this.loadZoneJSONData = function (url, sync) { var processData = function (data) { data = eval('('+ data +')'); for (var z in data.zones) { _this.zones[z] = data.zones[z]; } for (var r in data.rules) { _this.rules[r] = data.rules[r]; } }; return sync ? processData(_this.transport({ url : url, async : false })) : _this.transport({ url : url, success : processData }); }; this.loadZoneDataFromObject = function (data) { if (!data) { return; } for (var z in data.zones) { _this.zones[z] = data.zones[z]; } for (var r in data.rules) { _this.rules[r] = data.rules[r]; } }; this.getAllZones = function () { var arr = []; for (var z in this.zones) { arr.push(z); } return arr.sort(); }; this.parseZones = function (str) { var lines = str.split('\n') , arr = [] , chunk = '' , l , zone = null , rule = null; for (var i = 0; i < lines.length; i++) { l = lines[i]; if (l.match(/^\s/)) { l = "Zone " + zone + l; } l = l.split("#")[0]; if (l.length > 3) { arr = l.split(/\s+/); chunk = arr.shift(); //Ignore Leap. switch (chunk) { case 'Zone': zone = arr.shift(); if (!_this.zones[zone]) { _this.zones[zone] = []; } if (arr.length < 3) break; //Process zone right here and replace 3rd element with the processed array. arr.splice(3, arr.length, processZone(arr)); if (arr[3]) arr[3] = Date.UTC.apply(null, arr[3]); arr[0] = -getBasicOffset(arr[0]); _this.zones[zone].push(arr); break; case 'Rule': rule = arr.shift(); if (!_this.rules[rule]) { _this.rules[rule] = []; } //Parse int FROM year and TO year arr[0] = parseInt(arr[0], 10); arr[1] = parseInt(arr[1], 10) || arr[1]; //Parse time string AT arr[5] = parseTimeString(arr[5]); //Parse offset SAVE arr[6] = getBasicOffset(arr[6]); _this.rules[rule].push(arr); break; case 'Link': //No zones for these should already exist. if (_this.zones[arr[1]]) { throw new Error('Error with Link ' + arr[1] + '. Cannot create link of a preexisted zone.'); } //Create the link. _this.zones[arr[1]] = arr[0]; break; } } } return true; }; //Expose transport mechanism and allow overwrite. this.transport = _transport; this.getTzInfo = function (dt, tz, isUTC) { //Lazy-load any zones not yet loaded. if (this.loadingScheme === this.loadingSchemes.LAZY_LOAD) { //Get the correct region for the zone. var zoneFile = getRegionForTimezone(tz); if (!zoneFile) { throw new Error('Not a valid timezone ID.'); } if (!this.loadedZones[zoneFile]) { //Get the file and parse it -- use synchronous XHR. this.loadZoneFile(zoneFile); } } var z = getZone(dt, tz); var off = z[0]; //See if the offset needs adjustment. var rule = getRule(dt, z, isUTC); if (rule) { off = getAdjustedOffset(off, rule); } var abbr = getAbbreviation(z, rule); return { tzOffset: off, tzAbbr: abbr }; }; }; }).call(this);