text: ﻿/* http://keith-wood.name/calendars.html
     Thai calendar for jQuery v2.0.2.
     Written by Keith Wood (wood.keith{at}optusnet.com.au) February 2010.
     Available under the MIT (http://keith-wood.name/licence.html) license. 
     Please attribute the author if you use it. */
  
  (function($) { // Hide scope, no $ conflict
  
  	var gregorianCalendar = $.calendars.instance();
  
  	/** Implementation of the Thai calendar.
  		See http://en.wikipedia.org/wiki/Thai_calendar.
  		@class ThaiCalendar
  		@param [language=''] {string} The language code (default English) for localisation. */
  	function ThaiCalendar(language) {
  		this.local = this.regionalOptions[language || ''] || this.regionalOptions[''];
  	}
  
  	ThaiCalendar.prototype = new $.calendars.baseCalendar;
  
  	$.extend(ThaiCalendar.prototype, {
  		/** The calendar name.
  			@memberof ThaiCalendar */
  		name: 'Thai',
  		/** Julian date of start of Thai epoch: 1 January 543 BCE (Gregorian).
  			@memberof ThaiCalendar */
  		jdEpoch: 1523098.5,
  		/** Difference in years between Thai and Gregorian calendars.
  			@memberof ThaiCalendar */
  		yearsOffset: 543, 
  		/** Days per month in a common year.
  			@memberof ThaiCalendar */
  		daysPerMonth: [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
  		/** <code>true</code> if has a year zero, <code>false</code> if not.
  			@memberof ThaiCalendar */
  		hasYearZero: false,
  		/** The minimum month number.
  			@memberof ThaiCalendar */
  		minMonth: 1,
  		/** The first month in the year.
  			@memberof ThaiCalendar */
  		firstMonth: 1,
  		/** The minimum day number.
  			@memberof ThaiCalendar */
  		minDay: 1,
  
  		/** Localisations for the plugin.
  			Entries are objects indexed by the language code ('' being the default US/English).
  			Each object has the following attributes.
  			@memberof ThaiCalendar
  			@property name {string} The calendar name.
  			@property epochs {string[]} The epoch names.
  			@property monthNames {string[]} The long names of the months of the year.
  			@property monthNamesShort {string[]} The short names of the months of the year.
  			@property dayNames {string[]} The long names of the days of the week.
  			@property dayNamesShort {string[]} The short names of the days of the week.
  			@property dayNamesMin {string[]} The minimal names of the days of the week.
  			@property dateFormat {string} The date format for this calendar.
  					See the options on <a href="BaseCalendar.html#formatDate"><code>formatDate</code></a> for details.
  			@property firstDay {number} The number of the first day of the week, starting at 0.
  			@property isRTL {number} <code>true</code> if this localisation reads right-to-left. */
  		regionalOptions: { // Localisations
  			'': {
  				name: 'Thai',
  				epochs: ['BBE', 'BE'],
  				monthNames: ['January', 'February', 'March', 'April', 'May', 'June',
  				'July', 'August', 'September', 'October', 'November', 'December'],
  				monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
  				dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
  				dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
  				dayNamesMin: ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa'],
  				digits: null,
  				dateFormat: 'dd/mm/yyyy',
  				firstDay: 0,
  				isRTL: false
  			}
  		},
  
  		/** Determine whether this date is in a leap year.
  			@memberof ThaiCalendar
  			@param year {CDate|number} The date to examine or the year to examine.
  			@return {boolean} <code>true</code> if this is a leap year, <code>false</code> if not.
  			@throws Error if an invalid year or a different calendar used. */
  		leapYear: function(year) {
  			var date = this._validate(year, this.minMonth, this.minDay, $.calendars.local.invalidYear);
  			var year = this._t2gYear(date.year());
  			return gregorianCalendar.leapYear(year);
  		},
  
  		/** Determine the week of the year for a date - ISO 8601.
  			@memberof ThaiCalendar
  			@param year {CDate|number} The date to examine or the year to examine.
  			@param [month] {number} The month to examine.
  			@param [day] {number} The day to examine.
  			@return {number} The week of the year.
  			@throws Error if an invalid date or a different calendar used. */
  		weekOfYear: function(year, month, day) {
  			var date = this._validate(year, this.minMonth, this.minDay, $.calendars.local.invalidYear);
  			var year = this._t2gYear(date.year());
  			return gregorianCalendar.weekOfYear(year, date.month(), date.day());
  		},
  
  		/** Retrieve the number of days in a month.
  			@memberof ThaiCalendar
  			@param year {CDate|number} The date to examine or the year of the month.
  			@param [month] {number} The month.
  			@return {number} The number of days in this month.
  			@throws Error if an invalid month/year or a different calendar used. */
  		daysInMonth: function(year, month) {
  			var date = this._validate(year, month, this.minDay, $.calendars.local.invalidMonth);
  			return this.daysPerMonth[date.month() - 1] +
  				(date.month() === 2 && this.leapYear(date.year()) ? 1 : 0);
  		},
  
  		/** Determine whether this date is a week day.
  			@memberof ThaiCalendar
  			@param year {CDate|number} The date to examine or the year to examine.
  			@param [month] {number} The month to examine.
  			@param [day] {number} The day to examine.
  			@return {boolean} <code>true</code> if a week day, <code>false</code> if not.
  			@throws Error if an invalid date or a different calendar used. */
  		weekDay: function(year, month, day) {
  			return (this.dayOfWeek(year, month, day) || 7) < 6;
  		},
  
  		/** Retrieve the Julian date equivalent for this date,
  			i.e. days since January 1, 4713 BCE Greenwich noon.
  			@memberof ThaiCalendar
  			@param year {CDate|number} The date to convert or the year to convert.
  			@param [month] {number} The month to convert.
  			@param [day] {number} The day to convert.
  			@return {number} The equivalent Julian date.
  			@throws Error if an invalid date or a different calendar used. */
  		toJD: function(year, month, day) {
  			var date = this._validate(year, month, day, $.calendars.local.invalidDate);
  			var year = this._t2gYear(date.year());
  			return gregorianCalendar.toJD(year, date.month(), date.day());
  		},
  
  		/** Create a new date from a Julian date.
  			@memberof ThaiCalendar
  			@param jd {number} The Julian date to convert.
  			@return {CDate} The equivalent date. */
  		fromJD: function(jd) {
  			var date = gregorianCalendar.fromJD(jd);
  			var year = this._g2tYear(date.year());
  			return this.newDate(year, date.month(), date.day());
  		},
  
  		/** Convert Thai to Gregorian year.
  			@memberof ThaiCalendar
  			@private
  			@param year {number} The Thai year.
  			@return {number} The corresponding Gregorian year. */
  		_t2gYear: function(year) {
  			return year - this.yearsOffset - (year >= 1 && year <= this.yearsOffset ? 1 : 0);
  		},
  
  		/** Convert Gregorian to Thai year.
  			@memberof ThaiCalendar
  			@private
  			@param year {number} The Gregorian year.
  			@return {number} The corresponding Thai year. */
  		_g2tYear: function(year) {
  			return year + this.yearsOffset + (year >= -this.yearsOffset && year <= -1 ? 1 : 0);
  		}
  	});
  
  	// Thai calendar implementation
  	$.calendars.calendars.thai = ThaiCalendar;
  
  })(jQuery);