calendar.rc4.js

java日期日历控件

		
		this.check(cal); // checks other cals

		this.calendars.each(function(kal) { // update cal graphic if visible
			if (kal.visible) { this.display(kal); }
		}, this);
	},


	// check: checks other calendars to make sure no overlapping values
	// @param cal (obj)

	check: function(cal) {
		this.calendars.each(function(kal, i) {
			if (kal.val) { // if calendar has value set
				var change = false;
			
				if (i < cal.id) { // preceding calendar
					var bound = new Date(Date.parse(cal.val));
					
					bound.setDate(bound.getDate() - (this.options.pad * (cal.id - i)));

					if (bound < kal.val) { change = true; }
				}
				if (i > cal.id) { // following calendar
					var bound = new Date(Date.parse(cal.val));
					
					bound.setDate(bound.getDate() + (this.options.pad * (i - cal.id)));
					
					if (bound > kal.val) { change = true; }
				}

				if (change) {
					if (kal.start > bound) { bound = kal.start; }
					if (kal.end < bound) { bound = kal.end; }

					kal.month = bound.getMonth();
					kal.year = bound.getFullYear();		

					$extend(kal, this.values(kal));			

					// TODO - IN THE CASE OF SELECT MOVE TO NEAREST VALID VALUE
					// IN THE CASE OF INPUT DISABLE

					// if new date is not valid better unset cal value
					// otherwise it would mean incrementally checking to find the nearest valid date which could be months / years away
					kal.val = kal.days.contains(bound.getDate()) ? bound : null;

					this.write(kal);

					if (kal.visible) { this.display(kal); } // update cal graphic if visible
				}
			}
			else {
				kal.month = cal.month;
				kal.year = cal.year;
			}
		}, this);
	},
	

	// clicked: run when a valid day is clicked in the calendar
	// @param cal (obj)

	clicked: function(td, day, cal) {
		cal.val = (this.value(cal) == day) ? null : new Date(cal.year, cal.month, day); // set new value - if same then disable

		this.write(cal); 

		// ok - in the special case that it's all selects and there's always a date no matter what (at least as far as the form is concerned)
		// we can't let the calendar undo a date selection - it's just not possible!!
		if (!cal.val) { cal.val = this.read(cal); }

		if (cal.val) {
			this.check(cal); // checks other cals						
			this.toggle(cal); // hide cal
		} 
		else { // remove active class and replace with valid
			td.addClass(this.classes.valid);
			td.removeClass(this.classes.active);
		}
	},
	

	// display: create calendar element
	// @param cal (obj)

	display: function(cal) {
		// 1. header and navigation
		this.calendar.empty(); // init div

		this.calendar.className = this.classes.calendar + ' ' + this.options.months[cal.month].toLowerCase();

		var div = new Element('div').injectInside(this.calendar); // a wrapper div to help correct browser css problems with the caption element

		var table = new Element('table').injectInside(div).adopt(this.caption(cal));
				
		// 2. day names		
		var thead = new Element('thead').injectInside(table);

		var tr = new Element('tr').injectInside(thead);
		
		for (var i = 0; i <= 6; i++) {
			var th = this.options.days[(i + this.options.offset) % 7];
			
			tr.adopt(new Element('th', { 'title': th }).appendText(th.substr(0, 1)));
		}

		// 3. day numbers
		var tbody = new Element('tbody').injectInside(table);
		var tr = new Element('tr').injectInside(tbody);

		var d = new Date(cal.year, cal.month, 1);
		var offset = ((d.getDay() - this.options.offset) + 7) % 7; // day of the week (offset)
		var last = new Date(cal.year, cal.month + 1, 0).getDate(); // last day of this month
		var prev = new Date(cal.year, cal.month, 0).getDate(); // last day of previous month
		var active = this.value(cal); // active date (if set and within curr month)
		var valid = cal.days; // valid days for curr month
		var inactive = []; // active dates set by other calendars
		var hilited = [];
		this.calendars.each(function(kal, i) {
			if (kal != cal && kal.val) {
				if (cal.year == kal.val.getFullYear() && cal.month == kal.val.getMonth()) { inactive.push(kal.val.getDate()); }

				if (cal.val) {
					for (var day = 1; day <= last; day++) {
						d.setDate(day);
						
						if ((i < cal.id && d > kal.val && d < cal.val) || (i > cal.id && d > cal.val && d < kal.val)) { 
							if (!hilited.contains(day)) { hilited.push(day); }
						}
					}
				}
			}
		}, this);
		var d = new Date();
		var today = new Date(d.getFullYear(), d.getMonth(), d.getDate()).getTime(); // today obv 
		
		for (var i = 1; i < 43; i++) { // 1 to 42 (6 x 7 or 6 weeks)
			if ((i - 1) % 7 == 0) { tr = new Element('tr').injectInside(tbody); } // each week is it's own table row

			var td = new Element('td').injectInside(tr);
						
			var day = i - offset;
			var date = new Date(cal.year, cal.month, day);
			
			var cls = '';
			
			if (day === active) { cls = this.classes.active; } // active
			else if (inactive.contains(day)) { cls = this.classes.inactive; } // inactive
			else if (valid.contains(day)) { cls = this.classes.valid; } // valid
			else if (day >= 1 && day <= last) { cls = this.classes.invalid; } // invalid

			if (date.getTime() == today) { cls = cls + ' ' + this.classes.today; } // adds class for today

			if (hilited.contains(day)) { cls = cls + ' ' + this.classes.hilite; } // adds class if hilited

			td.addClass(cls);

			if (valid.contains(day)) { // if it's a valid - clickable - day we add interaction
				td.setProperty('title', this.format(date, 'D M jS Y'));
				
				td.addEvents({
					'click': function(td, day, cal) { 
						this.clicked(td, day, cal); 
					}.pass([td, day, cal], this),
					'mouseover': function(td, cls) { 
						td.addClass(cls); 
					}.pass([td, this.classes.hover]),
					'mouseout': function(td, cls) { 
						td.removeClass(cls); 
					}.pass([td, this.classes.hover])
				});
			}

			// pad calendar with last days of prev month and first days of next month
			if (day < 1) { day = prev + day; }
			else if (day > last) { day = day - last; }

			td.appendText(day);
		}
	},


	// element: helper function
	// @param el (string) element id
	// @param f (string) format string
	// @param cal (obj)

	element: function(el, f, cal) {
		if ($type(f) == 'object') { // in the case of multiple inputs per calendar
			for (var i in f) { 
				if (!this.element(i, f[i], cal)) { return false; }		
			}
			
			return true;
		}

		el = $(el);

		if (!el) { return false; }
		
		el.format = f;
		
		if (el.getTag() == 'select') { // select elements allow the user to manually set the date via select option
			el.addEvent('change', function(cal) { this.changed(cal); }.pass(cal, this));
		}
		else { // input (type text) elements restrict the user to only setting the date via the calendar
			el.readOnly = true;
			el.addEvent('focus', function(cal) { this.toggle(cal); }.pass(cal, this));
		}

		cal.els.push(el);

		return true;
	},


	// format: formats a date object according to passed in instructions
	// @param date (obj)
	// @param f (string) any combination of punctuation / separators and d, j, D, l, S, m, n, F, M, y, Y
	// @returns string

	format: function(date, format) {
		var str = '';
		
		if (date) {
			var j = date.getDate(); // 1 - 31
      var w = date.getDay(); // 0 - 6
			var l = this.options.days[w]; // Sunday - Saturday
			var n = date.getMonth() + 1; // 1 - 12
			var f = this.options.months[n - 1]; // January - December
			var y = date.getFullYear() + ''; // 19xx - 20xx
			
			for (var i = 0, len = format.length; i < len; i++) {
				var cha = format.charAt(i); // format char
				
				switch(cha) {
					// year cases
					case 'y': // xx - xx
						y = y.substr(2);
					case 'Y': // 19xx - 20xx
						str += y;
						break;
	
					// month cases
					case 'm': // 01 - 12
						if (n < 10) { n = '0' + n; }
					case 'n': // 1 - 12
						str += n;
						break;
	
					case 'M': // Jan - Dec
						f = f.substr(0, 3);
					case 'F': // January - December
						str += f;
						break;
	
					// day cases
					case 'd': // 01 - 31
						if (j < 10) { j = '0' + j; }
					case 'j': // 1 - 31
						str += j;
						break;
	
					case 'D': // Sun - Sat
						l = l.substr(0, 3);
					case 'l': // Sunday - Saturday
						str += l;
						break;
	
					case 'N': // 1 - 7
						w += 1;
					case 'w': // 0 - 6
						str += w;
						break;

					case 'S': // st, nd, rd or th (works well with j)
						if (j % 10 == 1 && j != '11') { str += 'st'; }
						else if (j % 10 == 2 && j != '12') { str += 'nd'; }
						else if (j % 10 == 3 && j != '13') { str += 'rd'; }
						else { str += 'th'; }
						break;
	
					default:
						str += cha;
				}
			}
		}

	  return str; //  return format with values replaced
	},


	// navigate: calendar navigation
	// @param cal (obj)
	// @param type (str) m or y for month or year
	// @param n (int) + or - for next or prev

	navigate: function(cal, type, n) {
		switch (type) {
			case 'm': // month
					if ($type(cal.months) == 'array') {
						var i = cal.months.indexOf(cal.month) + n; // index of current month
						
						if (i < 0 || i == cal.months.length) { // out of range
							if (this.options.navigation == 1) { // if type 1 nav we'll need to increment the year
								this.navigate(cal, 'y', n);		
							}
		
							i = (i < 0) ? cal.months.length - 1 : 0;
						}

						cal.month = cal.months[i];
					}
					else { 
						var i = cal.month + n;
		
						if (i < 0 || i == 12) {
							if (this.options.navigation == 1) {
								this.navigate(cal, 'y', n);	
							}
		
							i = (i < 0) ? 11 : 0;
						}
						
						cal.month = i;
					}		
					break;

				case 'y': // year
					if ($type(cal.years) == 'array') {
						var i = cal.years.indexOf(cal.year) + n;

						cal.year = cal.years[i]; 
					}
					else { 
						cal.year += n;
					}						
					break;		
		}

		$extend(cal, this.values(cal));

		if ($type(cal.months) == 'array') { // if the calendar has a months select
			var i = cal.months.indexOf(cal.month); // and make sure the curr months exists for the new year

			if (i < 0) { cal.month = cal.months[0]; } // otherwise we'll reset the month
		}


		this.display(cal);
	},


	// read: compiles cal value based on array of inputs passed in
	// @param cal (obj)
	// @returns date (obj) or (null)

	read: function(cal) {
		var arr = [null, null, null];

		cal.els.each(function(el) {
			// returns an array which may contain empty values
			var values = this.unformat(el.value, el.format);
			
			values.each(function(val, i) {