calendar-debug.js

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	* Determines whether a given date is between two other dates on the calendar.
	* @method between
	* @param {Date} date		The date to check for
	* @param {Date} dateBegin	The start of the range
	* @param {Date} dateEnd		The end of the range
	* @return {Boolean} true if the date occurs between the compared dates; false if not.
	*/
	between : function(date, dateBegin, dateEnd) {
		if (this.after(date, dateBegin) && this.before(date, dateEnd)) {
			return true;
		} else {
			return false;
		}
	},
	
	/**
	* Retrieves a JavaScript Date object representing January 1 of any given year.
	* @method getJan1
	* @param {Number} calendarYear		The calendar year for which to retrieve January 1
	* @return {Date}	January 1 of the calendar year specified.
	*/
	getJan1 : function(calendarYear) {
		return new Date(calendarYear,0,1); 
	},

	/**
	* Calculates the number of days the specified date is from January 1 of the specified calendar year.
	* Passing January 1 to this function would return an offset value of zero.
	* @method getDayOffset
	* @param {Date}	date	The JavaScript date for which to find the offset
	* @param {Number} calendarYear	The calendar year to use for determining the offset
	* @return {Number}	The number of days since January 1 of the given year
	*/
	getDayOffset : function(date, calendarYear) {
		var beginYear = this.getJan1(calendarYear); // Find the start of the year. This will be in week 1.
		
		// Find the number of days the passed in date is away from the calendar year start
		var dayOffset = Math.ceil((date.getTime()-beginYear.getTime()) / this.ONE_DAY_MS);
		return dayOffset;
	},

	/**
	* Calculates the week number for the given date. This function assumes that week 1 is the
	* week in which January 1 appears, regardless of whether the week consists of a full 7 days.
	* The calendar year can be specified to help find what a the week number would be for a given
	* date if the date overlaps years. For instance, a week may be considered week 1 of 2005, or
	* week 53 of 2004. Specifying the optional calendarYear allows one to make this distinction
	* easily.
	* @method getWeekNumber
	* @param {Date}	date	The JavaScript date for which to find the week number
	* @param {Number} calendarYear	OPTIONAL - The calendar year to use for determining the week number. Default is
	*											the calendar year of parameter "date".
	* @return {Number}	The week number of the given date.
	*/
	getWeekNumber : function(date, calendarYear) {
		date = this.clearTime(date);
		var nearestThurs = new Date(date.getTime() + (4 * this.ONE_DAY_MS) - ((date.getDay()) * this.ONE_DAY_MS));

		var jan1 = new Date(nearestThurs.getFullYear(),0,1);
		var dayOfYear = ((nearestThurs.getTime() - jan1.getTime()) / this.ONE_DAY_MS) - 1;

		var weekNum = Math.ceil((dayOfYear)/ 7);
		return weekNum;
	},

	/**
	* Determines if a given week overlaps two different years.
	* @method isYearOverlapWeek
	* @param {Date}	weekBeginDate	The JavaScript Date representing the first day of the week.
	* @return {Boolean}	true if the date overlaps two different years.
	*/
	isYearOverlapWeek : function(weekBeginDate) {
		var overlaps = false;
		var nextWeek = this.add(weekBeginDate, this.DAY, 6);
		if (nextWeek.getFullYear() != weekBeginDate.getFullYear()) {
			overlaps = true;
		}
		return overlaps;
	},

	/**
	* Determines if a given week overlaps two different months.
	* @method isMonthOverlapWeek
	* @param {Date}	weekBeginDate	The JavaScript Date representing the first day of the week.
	* @return {Boolean}	true if the date overlaps two different months.
	*/
	isMonthOverlapWeek : function(weekBeginDate) {
		var overlaps = false;
		var nextWeek = this.add(weekBeginDate, this.DAY, 6);
		if (nextWeek.getMonth() != weekBeginDate.getMonth()) {
			overlaps = true;
		}
		return overlaps;
	},

	/**
	* Gets the first day of a month containing a given date.
	* @method findMonthStart
	* @param {Date}	date	The JavaScript Date used to calculate the month start
	* @return {Date}		The JavaScript Date representing the first day of the month
	*/
	findMonthStart : function(date) {
		var start = new Date(date.getFullYear(), date.getMonth(), 1);
		return start;
	},

	/**
	* Gets the last day of a month containing a given date.
	* @method findMonthEnd
	* @param {Date}	date	The JavaScript Date used to calculate the month end
	* @return {Date}		The JavaScript Date representing the last day of the month
	*/
	findMonthEnd : function(date) {
		var start = this.findMonthStart(date);
		var nextMonth = this.add(start, this.MONTH, 1);
		var end = this.subtract(nextMonth, this.DAY, 1);
		return end;
	},

	/**
	* Clears the time fields from a given date, effectively setting the time to 12 noon.
	* @method clearTime
	* @param {Date}	date	The JavaScript Date for which the time fields will be cleared
	* @return {Date}		The JavaScript Date cleared of all time fields
	*/
	clearTime : function(date) {
		date.setHours(12,0,0,0);
		return date;
	}
};

/**
* The Calendar component is a UI control that enables users to choose one or more dates from a graphical calendar presented in a one-month  or multi-month interface. Calendars are generated entirely via script and can be navigated without any page refreshes.
* @module    calendar
* @title     Calendar
* @namespace YAHOO.widget
* @requires  yahoo,dom,event
*/

/**
* Calendar is the base class for the Calendar widget. In its most basic
* implementation, it has the ability to render a calendar widget on the page
* that can be manipulated to select a single date, move back and forth between
* months and years.
* <p>To construct the placeholder for the calendar widget, the code is as
* follows:
*	<xmp>
*		<div id="cal1Container"></div>
*	</xmp>
* </p>
* @namespace YAHOO.widget
* @class Calendar
* @constructor
* @param {String}	id			The id of the table element that will represent the calendar widget
* @param {String}	containerId	The id of the container div element that will wrap the calendar table
* @param {Object}	config		The configuration object containing the Calendar's arguments
*/
YAHOO.widget.Calendar = function(id, containerId, config) {
	this.init(id, containerId, config);
};

/**
* The path to be used for images loaded for the Calendar
* @property YAHOO.widget.Calendar.IMG_ROOT
* @static
* @deprecated	You can now customize images by overriding the calclose, calnavleft and calnavright default CSS classes for the close icon, left arrow and right arrow respectively
* @type String
*/
YAHOO.widget.Calendar.IMG_ROOT = null;

/**
* Type constant used for renderers to represent an individual date (M/D/Y)
* @property YAHOO.widget.Calendar.DATE
* @static
* @final
* @type String
*/
YAHOO.widget.Calendar.DATE = "D";

/**
* Type constant used for renderers to represent an individual date across any year (M/D)
* @property YAHOO.widget.Calendar.MONTH_DAY
* @static
* @final
* @type String
*/
YAHOO.widget.Calendar.MONTH_DAY = "MD";

/**
* Type constant used for renderers to represent a weekday
* @property YAHOO.widget.Calendar.WEEKDAY
* @static
* @final
* @type String
*/
YAHOO.widget.Calendar.WEEKDAY = "WD";

/**
* Type constant used for renderers to represent a range of individual dates (M/D/Y-M/D/Y)
* @property YAHOO.widget.Calendar.RANGE
* @static
* @final
* @type String
*/
YAHOO.widget.Calendar.RANGE = "R";

/**
* Type constant used for renderers to represent a month across any year
* @property YAHOO.widget.Calendar.MONTH
* @static
* @final
* @type String
*/
YAHOO.widget.Calendar.MONTH = "M";

/**
* Constant that represents the total number of date cells that are displayed in a given month
* @property YAHOO.widget.Calendar.DISPLAY_DAYS
* @static
* @final
* @type Number
*/
YAHOO.widget.Calendar.DISPLAY_DAYS = 42;

/**
* Constant used for halting the execution of the remainder of the render stack
* @property YAHOO.widget.Calendar.STOP_RENDER
* @static
* @final
* @type String
*/
YAHOO.widget.Calendar.STOP_RENDER = "S";

/**
* Constant used to represent short date field string formats (e.g. Tu or Feb)
* @property YAHOO.widget.Calendar.SHORT
* @static
* @final
* @type String
*/
YAHOO.widget.Calendar.SHORT = "short";

/**
* Constant used to represent long date field string formats (e.g. Monday or February)
* @property YAHOO.widget.Calendar.LONG
* @static
* @final
* @type String
*/
YAHOO.widget.Calendar.LONG = "long";

/**
* Constant used to represent medium date field string formats (e.g. Mon)
* @property YAHOO.widget.Calendar.MEDIUM
* @static
* @final
* @type String
*/
YAHOO.widget.Calendar.MEDIUM = "medium";

/**
* Constant used to represent single character date field string formats (e.g. M, T, W)
* @property YAHOO.widget.Calendar.ONE_CHAR
* @static
* @final
* @type String
*/
YAHOO.widget.Calendar.ONE_CHAR = "1char";

/**
* The set of default Config property keys and values for the Calendar
* @property YAHOO.widget.Calendar._DEFAULT_CONFIG
* @final
* @static
* @private
* @type Object
*/
YAHOO.widget.Calendar._DEFAULT_CONFIG = {
	// Default values for pagedate and selected are not class level constants - they are set during instance creation 
	PAGEDATE : {key:"pagedate", value:null},
	SELECTED : {key:"selected", value:null},
	TITLE : {key:"title", value:""},
	CLOSE : {key:"close", value:false},
	IFRAME : {key:"iframe", value:(YAHOO.env.ua.ie && YAHOO.env.ua.ie <= 6) ? true : false},
	MINDATE : {key:"mindate", value:null},
	MAXDATE : {key:"maxdate", value:null},
	MULTI_SELECT : {key:"multi_select", value:false},
	START_WEEKDAY : {key:"start_weekday", value:0},
	SHOW_WEEKDAYS : {key:"show_weekdays", value:true},
	SHOW_WEEK_HEADER : {key:"show_week_header", value:false},
	SHOW_WEEK_FOOTER : {key:"show_week_footer", value:false},
	HIDE_BLANK_WEEKS : {key:"hide_blank_weeks", value:false},
	NAV_ARROW_LEFT: {key:"nav_arrow_left", value:null} ,
	NAV_ARROW_RIGHT : {key:"nav_arrow_right", value:null} ,
	MONTHS_SHORT : {key:"months_short", value:["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]},
	MONTHS_LONG: {key:"months_long", value:["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]},
	WEEKDAYS_1CHAR: {key:"weekdays_1char", value:["S", "M", "T", "W", "T", "F", "S"]},
	WEEKDAYS_SHORT: {key:"weekdays_short", value:["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"]},
	WEEKDAYS_MEDIUM: {key:"weekdays_medium", value:["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]},
	WEEKDAYS_LONG: {key:"weekdays_long", value:["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]},
	LOCALE_MONTHS:{key:"locale_months", value:"long"},
	LOCALE_WEEKDAYS:{key:"locale_weekdays", value:"short"},
	DATE_DELIMITER:{key:"date_delimiter", value:","},
	DATE_FIELD_DELIMITER:{key:"date_field_delimiter", value:"/"},
	DATE_RANGE_DELIMITER:{key:"date_range_delimiter", value:"-"},
	MY_MONTH_POSITION:{key:"my_month_position", value:1},
	MY_YEAR_POSITION:{key:"my_year_position", value:2},
	MD_MONTH_POSITION:{key:"md_month_position", value:1},
	MD_DAY_POSITION:{key:"md_day_position", value:2},
	MDY_MONTH_POSITION:{key:"mdy_month_position", value:1},
	MDY_DAY_POSITION:{key:"mdy_day_position", value:2},
	MDY_YEAR_POSITION:{key:"mdy_year_position", value:3},
	MY_LABEL_MONTH_POSITION:{key:"my_label_month_position", value:1},
	MY_LABEL_YEAR_POSITION:{key:"my_label_year_position", value:2},
	MY_LABEL_MONTH_SUFFIX:{key:"my_label_month_suffix", value:" "},
	MY_LABEL_YEAR_SUFFIX:{key:"my_label_year_suffix", value:""}
};

/**
* The set of Custom Event types supported by the Calendar
* @property YAHOO.widget.Calendar._EVENT_TYPES
* @final
* @static
* @private
* @type Object
*/
YAHOO.widget.Calendar._EVENT_TYPES = {
	BEFORE_SELECT : "beforeSelect", 
	SELECT : "select",
	BEFORE_DESELECT : "beforeDeselect",
	DESELECT : "deselect",
	CHANGE_PAGE : "changePage",
	BEFORE_RENDER : "beforeRender",
	RENDER : "render",
	RESET : "reset",
	CLEAR : "clear"
};

/**
* The set of default style constants for the Calendar
* @property YAHOO.widget.Calendar._STYLES
* @final
* @static
* @private
* @type Object
*/
YAHOO.widget.Calendar._STYLES = {
	CSS_ROW_HEADER: "calrowhead",
	CSS_ROW_FOOTER: "calrowfoot",
	CSS_CELL : "calcell",
	CSS_CELL_SELECTOR : "selector",
	CSS_CELL_SELECTED : "selected",
	CSS_CELL_SELECTABLE : "selectable",
	CSS_CELL_RESTRICTED : "restricted",
	CSS_CELL_TODAY : "today",
	CSS_CELL_OOM : "oom",
	CSS_CELL_OOB : "previous",
	CSS_HEADER : "calheader",
	CSS_HEADER_TEXT : "calhead",
	CSS_BODY : "calbody",
	CSS_WEEKDAY_CELL : "calweekdaycell",
	CSS_WEEKDAY_ROW : "calweekdayrow",
	CSS_FOOTER : "calfoot",
	CSS_CALENDAR : "yui-calendar",
	CSS_SINGLE : "single",
	CSS_CONTAINER : "yui-calcontainer",
	CSS_NAV_LEFT : "calnavleft",
	CSS_NAV_RIGHT : "calnavright",
	CSS_CLOSE : "calclose",
	CSS_CELL_TOP : "calcelltop",
	CSS_CELL_LEFT : "calcellleft",
	CSS_CELL_RIGHT : "calcellright",
	CSS_CELL_BOTTOM : "calcellbottom",
	CSS_CELL_HOVER : "calcellhover",
	CSS_CELL_HIGHLIGHT1 : "highlight1",
	CSS_CELL_HIGHLIGHT2 : "highlight2",
	CSS_CELL_HIGHLIGHT3 : "highlight3",
	CSS_CELL_HIGHLIGHT4 : "highlight4"
};

YAHOO.widget.Calendar.prototype = {

	/**
	* The configuration object used to set up the calendars various locale and style options.
	* @property Config
	* @private
	* @deprecated Configuration properties should be set by calling Calendar.cfg.setProperty.
	* @type Object
	*/
	Config : null,

	/**
	* The parent CalendarGroup, only to be set explicitly by the parent group
	* @property parent
	* @type CalendarGroup
	*/	
	parent : null,

	/**
	* The index of this item in the parent group
	* @property index
	* @type Number
	*/
	index : -1,

	/**
	* The collection of calendar table cells
	* @property cells
	* @type HTMLTableCellElement[]
	*/
	cells : null,
	
	/**
	* The collection of calendar cell dates that is parallel to the cells collection. The array contains dates field arrays in the format of [YYYY, M, D].
	* @property cellDates
	* @type Array[](Number[])
	*/
	cellDates : null,

	/**