mirror of https://github.com/grafana/grafana
Rashid Khan
13 years ago
parent
1545e32b60
commit
1796323cb9
@ -0,0 +1,993 @@ |
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// -----
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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.
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//
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// 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 setting a value of 14 for the month wraps around to the next March).
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//
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// 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.
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/* |
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* Copyright 2010 Matthew Eernisse (mde@fleegix.org) |
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* and Open Source Applications Foundation |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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* Credits: Ideas included from incomplete JS implementation of Olson |
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* parser, "XMLDAte" by Philippe Goetz (philippe.goetz@wanadoo.fr) |
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* |
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* Contributions: |
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* Jan Niehusmann |
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* Ricky Romero |
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* Preston Hunt (prestonhunt@gmail.com) |
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* Dov. B Katz (dov.katz@morganstanley.com) |
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* Peter Bergström (pbergstr@mac.com) |
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* Long Ho |
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*/ |
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(function () { |
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// Standard initialization stuff to make sure the library is
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// usable on both client and server (node) side.
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"use strict"; |
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var root = this; |
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var timezoneJS; |
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if (typeof exports !== 'undefined') { |
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timezoneJS = exports; |
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} else { |
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timezoneJS = root.timezoneJS = {}; |
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} |
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timezoneJS.VERSION = '0.4.4'; |
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// Grab the ajax library from global context.
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// This can be jQuery, Zepto or fleegix.
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// You can also specify your own transport mechanism by declaring
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// `timezoneJS.timezone.transport` to a `function`. More details will follow
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var $ = root.$ || root.jQuery || root.Zepto |
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, fleegix = root.fleegix |
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, _arrIndexOf |
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// Declare constant list of days and months. Unfortunately this doesn't leave room for i18n due to the Olson data being in English itself
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, DAYS = timezoneJS.Days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'] |
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, MONTHS = timezoneJS.Months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'] |
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, SHORT_MONTHS = {} |
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, SHORT_DAYS = {} |
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, EXACT_DATE_TIME = {} |
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, TZ_REGEXP = new RegExp('^[a-zA-Z]+/'); |
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//`{ "Jan": 0, "Feb": 1, "Mar": 2, "Apr": 3, "May": 4, "Jun": 5, "Jul": 6, "Aug": 7, "Sep": 8, "Oct": 9, "Nov": 10, "Dec": 11 }`
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for (var i = 0; i < MONTHS.length; i++) { |
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SHORT_MONTHS[MONTHS[i].substr(0, 3)] = i; |
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} |
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//`{ "Sun": 0, "Mon": 1, "Tue": 2, "Wed": 3, "Thu": 4, "Fri": 5, "Sat": 6 }`
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for (i = 0; i < DAYS.length; i++) { |
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SHORT_DAYS[DAYS[i].substr(0, 3)] = i; |
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} |
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//Handle array indexOf in IE
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//From https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Array/indexOf
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//Extending Array prototype causes IE to iterate thru extra element
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_arrIndexOf = Array.prototype.indexOf || function (el) { |
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if (this === null) { |
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throw new TypeError(); |
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} |
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var t = Object(this); |
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var len = t.length >>> 0; |
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if (len === 0) { |
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return -1; |
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} |
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var n = 0; |
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if (arguments.length > 1) { |
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n = Number(arguments[1]); |
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if (n != n) { // shortcut for verifying if it's NaN
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n = 0; |
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} else if (n !== 0 && n !== Infinity && n !== -Infinity) { |
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n = (n > 0 || -1) * Math.floor(Math.abs(n)); |
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} |
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} |
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if (n >= len) { |
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return -1; |
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} |
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var k = n >= 0 ? n : Math.max(len - Math.abs(n), 0); |
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for (; k < len; k++) { |
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if (k in t && t[k] === el) { |
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return k; |
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} |
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} |
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return -1; |
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}; |
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// Format a number to the length = digits. For ex:
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//
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// `_fixWidth(2, 2) = '02'`
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//
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// `_fixWidth(1998, 2) = '98'`
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//
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// This is used to pad numbers in converting date to string in ISO standard.
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var _fixWidth = function (number, digits) { |
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if (typeof number !== "number") { throw "not a number: " + number; } |
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var s = number.toString(); |
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if (number.length > digits) { |
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return number.substr(number.length - digits, number.length); |
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} |
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while (s.length < digits) { |
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s = '0' + s; |
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} |
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return s; |
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}; |
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// Abstraction layer for different transport layers, including fleegix/jQuery/Zepto
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//
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// Object `opts` include
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//
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// - `url`: url to ajax query
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//
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// - `async`: true for asynchronous, false otherwise. If false, return value will be response from URL. This is true by default
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//
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// - `success`: success callback function
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//
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// - `error`: error callback function
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// Returns response from URL if async is false, otherwise the AJAX request object itself
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var _transport = function (opts) { |
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if ((!fleegix || typeof fleegix.xhr === 'undefined') && (!$ || typeof $.ajax === 'undefined')) { |
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throw new Error('Please use the Fleegix.js XHR module, jQuery ajax, Zepto ajax, or define your own transport mechanism for downloading zone files.'); |
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} |
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if (!opts) return; |
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if (!opts.url) throw new Error ('URL must be specified'); |
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if (!('async' in opts)) opts.async = true; |
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if (!opts.async) { |
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return fleegix && fleegix.xhr |
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? fleegix.xhr.doReq({ url: opts.url, async: false }) |
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: $.ajax({ url : opts.url, async : false }).responseText; |
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} |
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return fleegix && fleegix.xhr |
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? fleegix.xhr.send({ |
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url : opts.url, |
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method : 'get', |
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handleSuccess : opts.success, |
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handleErr : opts.error |
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}) |
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: $.ajax({ |
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url : opts.url, |
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dataType: 'text', |
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method : 'GET', |
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error : opts.error, |
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success : opts.success |
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}); |
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}; |
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// Constructor, which is similar to that of the native Date object itself
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timezoneJS.Date = function () { |
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var args = Array.prototype.slice.apply(arguments) |
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, dt = null |
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, tz = null |
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, arr = []; |
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//We support several different constructors, including all the ones from `Date` object
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// with a timezone string at the end.
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//
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//- `[tz]`: Returns object with time in `tz` specified.
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//
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// - `utcMillis`, `[tz]`: Return object with UTC time = `utcMillis`, in `tz`.
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//
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// - `Date`, `[tz]`: Returns object with UTC time = `Date.getTime()`, in `tz`.
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//
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// - `year, month, [date,] [hours,] [minutes,] [seconds,] [millis,] [tz]: Same as `Date` object
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// with tz.
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//
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// - `Array`: Can be any combo of the above.
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//
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//If 1st argument is an array, we can use it as a list of arguments itself
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if (Object.prototype.toString.call(args[0]) === '[object Array]') { |
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args = args[0]; |
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} |
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if (typeof args[args.length - 1] === 'string' && TZ_REGEXP.test(args[args.length - 1])) { |
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tz = args.pop(); |
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} |
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switch (args.length) { |
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case 0: |
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dt = new Date(); |
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break; |
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case 1: |
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dt = new Date(args[0]); |
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break; |
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default: |
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for (var i = 0; i < 7; i++) { |
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arr[i] = args[i] || 0; |
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} |
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dt = new Date(arr[0], arr[1], arr[2], arr[3], arr[4], arr[5], arr[6]); |
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break; |
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} |
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this._useCache = false; |
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this._tzInfo = {}; |
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this._day = 0; |
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this.year = 0; |
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this.month = 0; |
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this.date = 0; |
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this.hours = 0; |
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this.minutes = 0; |
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this.seconds = 0; |
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this.milliseconds = 0; |
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this.timezone = tz || null; |
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//Tricky part:
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// For the cases where there are 1/2 arguments: `timezoneJS.Date(millis, [tz])` and `timezoneJS.Date(Date, [tz])`. The
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// Date `dt` created should be in UTC. Thus the way I detect such cases is to determine if `arr` is not populated & `tz`
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// is specified. Because if `tz` is not specified, `dt` can be in local time.
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if (arr.length) { |
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this.setFromDateObjProxy(dt); |
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} else { |
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this.setFromTimeProxy(dt.getTime(), tz); |
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} |
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}; |
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// Implements most of the native Date object
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timezoneJS.Date.prototype = { |
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getDate: function () { return this.date; }, |
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getDay: function () { return this._day; }, |
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getFullYear: function () { return this.year; }, |
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getMonth: function () { return this.month; }, |
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getYear: function () { return this.year - 1900; }, |
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getHours: function () { return this.hours; }, |
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getMilliseconds: function () { return this.milliseconds; }, |
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getMinutes: function () { return this.minutes; }, |
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getSeconds: function () { return this.seconds; }, |
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getUTCDate: function () { return this.getUTCDateProxy().getUTCDate(); }, |
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getUTCDay: function () { return this.getUTCDateProxy().getUTCDay(); }, |
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getUTCFullYear: function () { return this.getUTCDateProxy().getUTCFullYear(); }, |
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getUTCHours: function () { return this.getUTCDateProxy().getUTCHours(); }, |
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getUTCMilliseconds: function () { return this.getUTCDateProxy().getUTCMilliseconds(); }, |
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getUTCMinutes: function () { return this.getUTCDateProxy().getUTCMinutes(); }, |
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getUTCMonth: function () { return this.getUTCDateProxy().getUTCMonth(); }, |
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getUTCSeconds: function () { return this.getUTCDateProxy().getUTCSeconds(); }, |
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// Time adjusted to user-specified timezone
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getTime: function () { |
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return this._timeProxy + (this.getTimezoneOffset() * 60 * 1000); |
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}, |
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getTimezone: function () { return this.timezone; }, |
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getTimezoneOffset: function () { return this.getTimezoneInfo().tzOffset; }, |
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getTimezoneAbbreviation: function () { return this.getTimezoneInfo().tzAbbr; }, |
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getTimezoneInfo: function () { |
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if (this._useCache) return this._tzInfo; |
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var res; |
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// If timezone is specified, get the correct timezone info based on the Date given
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if (this.timezone) { |
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res = this.timezone === 'Etc/UTC' || this.timezone === 'Etc/GMT' |
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? { tzOffset: 0, tzAbbr: 'UTC' } |
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: timezoneJS.timezone.getTzInfo(this._timeProxy, this.timezone); |
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} |
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// If no timezone was specified, use the local browser offset
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else { |
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res = { tzOffset: this.getLocalOffset(), tzAbbr: null }; |
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} |
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this._tzInfo = res; |
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this._useCache = true; |
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return res; |
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}, |
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getUTCDateProxy: function () { |
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var dt = new Date(this._timeProxy); |
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dt.setUTCMinutes(dt.getUTCMinutes() + this.getTimezoneOffset()); |
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return dt; |
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}, |
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setDate: function (date) { |
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this.setAttribute('date', date); |
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return this.getTime(); |
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}, |
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setFullYear: function (year, month, date) { |
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if (date !== undefined) { this.setAttribute('date', 1); } |
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this.setAttribute('year', year); |
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if (month !== undefined) { this.setAttribute('month', month); } |
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if (date !== undefined) { this.setAttribute('date', date); } |
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return this.getTime(); |
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}, |
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setMonth: function (month, date) { |
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this.setAttribute('month', month); |
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if (date !== undefined) { this.setAttribute('date', date); } |
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return this.getTime(); |
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}, |
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setYear: function (year) { |
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year = Number(year); |
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if (0 <= year && year <= 99) { year += 1900; } |
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this.setUTCAttribute('year', year); |
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return this.getTime(); |
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}, |
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setHours: function (hours, minutes, seconds, milliseconds) { |
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this.setAttribute('hours', hours); |
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if (minutes !== undefined) { this.setAttribute('minutes', minutes); } |
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if (seconds !== undefined) { this.setAttribute('seconds', seconds); } |
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if (milliseconds !== undefined) { this.setAttribute('milliseconds', milliseconds); } |
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return this.getTime(); |
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}, |
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setMinutes: function (minutes, seconds, milliseconds) { |
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this.setAttribute('minutes', minutes); |
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if (seconds !== undefined) { this.setAttribute('seconds', seconds); } |
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if (milliseconds !== undefined) { this.setAttribute('milliseconds', milliseconds); } |
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return this.getTime(); |
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}, |
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setSeconds: function (seconds, milliseconds) { |
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this.setAttribute('seconds', seconds); |
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if (milliseconds !== undefined) { this.setAttribute('milliseconds', milliseconds); } |
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return this.getTime(); |
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}, |
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setMilliseconds: function (milliseconds) { |
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this.setAttribute('milliseconds', milliseconds); |
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return this.getTime(); |
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}, |
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setTime: function (n) { |
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if (isNaN(n)) { throw new Error('Units must be a number.'); } |
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this.setFromTimeProxy(n, this.timezone); |
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return this.getTime(); |
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}, |
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setUTCFullYear: function (year, month, date) { |
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if (date !== undefined) { this.setUTCAttribute('date', 1); } |
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this.setUTCAttribute('year', year); |
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if (month !== undefined) { this.setUTCAttribute('month', month); } |
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if (date !== undefined) { this.setUTCAttribute('date', date); } |
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return this.getTime(); |
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}, |
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setUTCMonth: function (month, date) { |
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this.setUTCAttribute('month', month); |
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if (date !== undefined) { this.setUTCAttribute('date', date); } |
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return this.getTime(); |
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}, |
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setUTCDate: function (date) { |
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this.setUTCAttribute('date', date); |
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return this.getTime(); |
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}, |
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setUTCHours: function (hours, minutes, seconds, milliseconds) { |
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this.setUTCAttribute('hours', hours); |
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if (minutes !== undefined) { this.setUTCAttribute('minutes', minutes); } |
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if (seconds !== undefined) { this.setUTCAttribute('seconds', seconds); } |
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if (milliseconds !== undefined) { this.setUTCAttribute('milliseconds', milliseconds); } |
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return this.getTime(); |
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}, |
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setUTCMinutes: function (minutes, seconds, milliseconds) { |
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this.setUTCAttribute('minutes', minutes); |
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if (seconds !== undefined) { this.setUTCAttribute('seconds', seconds); } |
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if (milliseconds !== undefined) { this.setUTCAttribute('milliseconds', milliseconds); } |
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return this.getTime(); |
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}, |
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setUTCSeconds: function (seconds, milliseconds) { |
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this.setUTCAttribute('seconds', seconds); |
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if (milliseconds !== undefined) { this.setUTCAttribute('milliseconds', milliseconds); } |
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return this.getTime(); |
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}, |
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setUTCMilliseconds: function (milliseconds) { |
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this.setUTCAttribute('milliseconds', milliseconds); |
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return this.getTime(); |
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}, |
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setFromDateObjProxy: function (dt) { |
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this.year = dt.getFullYear(); |
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this.month = dt.getMonth(); |
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this.date = dt.getDate(); |
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this.hours = dt.getHours(); |
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this.minutes = dt.getMinutes(); |
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this.seconds = dt.getSeconds(); |
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this.milliseconds = dt.getMilliseconds(); |
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this._day = dt.getDay(); |
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this._dateProxy = dt; |
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this._timeProxy = Date.UTC(this.year, this.month, this.date, this.hours, this.minutes, this.seconds, this.milliseconds); |
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this._useCache = false; |
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}, |
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setFromTimeProxy: function (utcMillis, tz) { |
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var dt = new Date(utcMillis); |
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var tzOffset; |
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tzOffset = tz ? timezoneJS.timezone.getTzInfo(dt, tz).tzOffset : dt.getTimezoneOffset(); |
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dt.setTime(utcMillis + (dt.getTimezoneOffset() - tzOffset) * 60000); |
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this.setFromDateObjProxy(dt); |
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}, |
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setAttribute: function (unit, n) { |
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if (isNaN(n)) { throw new Error('Units must be a number.'); } |
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var dt = this._dateProxy; |
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var meth = unit === 'year' ? 'FullYear' : unit.substr(0, 1).toUpperCase() + unit.substr(1); |
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dt['set' + meth](n); |
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this.setFromDateObjProxy(dt); |
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}, |
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setUTCAttribute: function (unit, n) { |
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if (isNaN(n)) { throw new Error('Units must be a number.'); } |
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var meth = unit === 'year' ? 'FullYear' : unit.substr(0, 1).toUpperCase() + unit.substr(1); |
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var dt = this.getUTCDateProxy(); |
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dt['setUTC' + meth](n); |
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dt.setUTCMinutes(dt.getUTCMinutes() - this.getTimezoneOffset()); |
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this.setFromTimeProxy(dt.getTime() + this.getTimezoneOffset() * 60000, this.timezone); |
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}, |
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setTimezone: function (tz) { |
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var previousOffset = this.getTimezoneInfo().tzOffset; |
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this.timezone = tz; |
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this._useCache = false; |
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// Set UTC minutes offsets by the delta of the two timezones
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this.setUTCMinutes(this.getUTCMinutes() - this.getTimezoneInfo().tzOffset + previousOffset); |
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}, |
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removeTimezone: function () { |
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this.timezone = null; |
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this._useCache = false; |
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}, |
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valueOf: function () { return this.getTime(); }, |
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clone: function () { |
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return this.timezone ? new timezoneJS.Date(this.getTime(), this.timezone) : new timezoneJS.Date(this.getTime()); |
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}, |
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toGMTString: function () { return this.toString('EEE, dd MMM yyyy HH:mm:ss Z', 'Etc/GMT'); }, |
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toLocaleString: function () {}, |
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toLocaleDateString: function () {}, |
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toLocaleTimeString: function () {}, |
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toSource: function () {}, |
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toISOString: function () { return this.toString('yyyy-MM-ddTHH:mm:ss.SSS', 'Etc/UTC') + 'Z'; }, |
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toJSON: function () { return this.toISOString(); }, |
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// Allows different format following ISO8601 format:
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toString: function (format, tz) { |
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// Default format is the same as toISOString
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if (!format) format = 'yyyy-MM-dd HH:mm:ss'; |
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var result = format; |
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var tzInfo = tz ? timezoneJS.timezone.getTzInfo(this.getTime(), tz) : this.getTimezoneInfo(); |
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var _this = this; |
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// If timezone is specified, get a clone of the current Date object and modify it
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if (tz) { |
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_this = this.clone(); |
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_this.setTimezone(tz); |
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} |
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var hours = _this.getHours(); |
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return result |
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// fix the same characters in Month names
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.replace(/a+/g, function () { return 'k'; }) |
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// `y`: year
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.replace(/y+/g, function (token) { return _fixWidth(_this.getFullYear(), token.length); }) |
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// `d`: date
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.replace(/d+/g, function (token) { return _fixWidth(_this.getDate(), token.length); }) |
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// `m`: minute
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.replace(/m+/g, function (token) { return _fixWidth(_this.getMinutes(), token.length); }) |
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// `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.charAt(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]; |
||||
|
||||
// If the zone has a DST rule like '1:00', create a rule and return it
|
||||
// instead of looking it up in the parsed rules
|
||||
var staticDstMatch = ruleset.match(/^([0-9]):([0-9][0-9])$/); |
||||
if (staticDstMatch) { |
||||
return [-1000000,'max','-','Jan',1,parseTimeString('0:00'),parseInt(staticDstMatch[1]) * 60 + parseInt(staticDstMatch[2]), '-']; |
||||
} |
||||
|
||||
//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 (_arrIndexOf.call(applicableRules, date) < 2) { |
||||
applicableRules = applicableRules.concat(findApplicableRules(year-1, _this.rules[ruleset])); |
||||
applicableRules.sort(compareDates); |
||||
} |
||||
var pinpoint = _arrIndexOf.call(applicableRules, 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 = null; |
||||
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.loadingScheme === this.loadingSchemes.PRELOAD_ALL |
||||
? this.zoneFiles |
||||
: (this.defaultZoneFile || '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); |
||||
Loading…
Reference in new issue