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annotate media/django/js/calendar.js @ 1:0dcfcdf50c62

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Initial import of Madeira project from the private repository.
author Brian Neal <bgneal@gmail.com>
date Mon, 06 Apr 2009 03:10:59 +0000
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bgneal@1 1 /*
bgneal@1 2 calendar.js - Calendar functions by Adrian Holovaty
bgneal@1 3 */
bgneal@1 4
bgneal@1 5 function removeChildren(a) { // "a" is reference to an object
bgneal@1 6 while (a.hasChildNodes()) a.removeChild(a.lastChild);
bgneal@1 7 }
bgneal@1 8
bgneal@1 9 // quickElement(tagType, parentReference, textInChildNode, [, attribute, attributeValue ...]);
bgneal@1 10 function quickElement() {
bgneal@1 11 var obj = document.createElement(arguments[0]);
bgneal@1 12 if (arguments[2] != '' && arguments[2] != null) {
bgneal@1 13 var textNode = document.createTextNode(arguments[2]);
bgneal@1 14 obj.appendChild(textNode);
bgneal@1 15 }
bgneal@1 16 var len = arguments.length;
bgneal@1 17 for (var i = 3; i < len; i += 2) {
bgneal@1 18 obj.setAttribute(arguments[i], arguments[i+1]);
bgneal@1 19 }
bgneal@1 20 arguments[1].appendChild(obj);
bgneal@1 21 return obj;
bgneal@1 22 }
bgneal@1 23
bgneal@1 24 // CalendarNamespace -- Provides a collection of HTML calendar-related helper functions
bgneal@1 25 var CalendarNamespace = {
bgneal@1 26 monthsOfYear: gettext('January February March April May June July August September October November December').split(' '),
bgneal@1 27 daysOfWeek: gettext('S M T W T F S').split(' '),
bgneal@1 28 isLeapYear: function(year) {
bgneal@1 29 return (((year % 4)==0) && ((year % 100)!=0) || ((year % 400)==0));
bgneal@1 30 },
bgneal@1 31 getDaysInMonth: function(month,year) {
bgneal@1 32 var days;
bgneal@1 33 if (month==1 || month==3 || month==5 || month==7 || month==8 || month==10 || month==12) {
bgneal@1 34 days = 31;
bgneal@1 35 }
bgneal@1 36 else if (month==4 || month==6 || month==9 || month==11) {
bgneal@1 37 days = 30;
bgneal@1 38 }
bgneal@1 39 else if (month==2 && CalendarNamespace.isLeapYear(year)) {
bgneal@1 40 days = 29;
bgneal@1 41 }
bgneal@1 42 else {
bgneal@1 43 days = 28;
bgneal@1 44 }
bgneal@1 45 return days;
bgneal@1 46 },
bgneal@1 47 draw: function(month, year, div_id, callback) { // month = 1-12, year = 1-9999
bgneal@1 48 month = parseInt(month);
bgneal@1 49 year = parseInt(year);
bgneal@1 50 var calDiv = document.getElementById(div_id);
bgneal@1 51 removeChildren(calDiv);
bgneal@1 52 var calTable = document.createElement('table');
bgneal@1 53 quickElement('caption', calTable, CalendarNamespace.monthsOfYear[month-1] + ' ' + year);
bgneal@1 54 var tableBody = quickElement('tbody', calTable);
bgneal@1 55
bgneal@1 56 // Draw days-of-week header
bgneal@1 57 var tableRow = quickElement('tr', tableBody);
bgneal@1 58 for (var i = 0; i < 7; i++) {
bgneal@1 59 quickElement('th', tableRow, CalendarNamespace.daysOfWeek[i]);
bgneal@1 60 }
bgneal@1 61
bgneal@1 62 var startingPos = new Date(year, month-1, 1).getDay();
bgneal@1 63 var days = CalendarNamespace.getDaysInMonth(month, year);
bgneal@1 64
bgneal@1 65 // Draw blanks before first of month
bgneal@1 66 tableRow = quickElement('tr', tableBody);
bgneal@1 67 for (var i = 0; i < startingPos; i++) {
bgneal@1 68 var _cell = quickElement('td', tableRow, ' ');
bgneal@1 69 _cell.style.backgroundColor = '#f3f3f3';
bgneal@1 70 }
bgneal@1 71
bgneal@1 72 // Draw days of month
bgneal@1 73 var currentDay = 1;
bgneal@1 74 for (var i = startingPos; currentDay <= days; i++) {
bgneal@1 75 if (i%7 == 0 && currentDay != 1) {
bgneal@1 76 tableRow = quickElement('tr', tableBody);
bgneal@1 77 }
bgneal@1 78 var cell = quickElement('td', tableRow, '');
bgneal@1 79 quickElement('a', cell, currentDay, 'href', 'javascript:void(' + callback + '('+year+','+month+','+currentDay+'));');
bgneal@1 80 currentDay++;
bgneal@1 81 }
bgneal@1 82
bgneal@1 83 // Draw blanks after end of month (optional, but makes for valid code)
bgneal@1 84 while (tableRow.childNodes.length < 7) {
bgneal@1 85 var _cell = quickElement('td', tableRow, ' ');
bgneal@1 86 _cell.style.backgroundColor = '#f3f3f3';
bgneal@1 87 }
bgneal@1 88
bgneal@1 89 calDiv.appendChild(calTable);
bgneal@1 90 }
bgneal@1 91 }
bgneal@1 92
bgneal@1 93 // Calendar -- A calendar instance
bgneal@1 94 function Calendar(div_id, callback) {
bgneal@1 95 // div_id (string) is the ID of the element in which the calendar will
bgneal@1 96 // be displayed
bgneal@1 97 // callback (string) is the name of a JavaScript function that will be
bgneal@1 98 // called with the parameters (year, month, day) when a day in the
bgneal@1 99 // calendar is clicked
bgneal@1 100 this.div_id = div_id;
bgneal@1 101 this.callback = callback;
bgneal@1 102 this.today = new Date();
bgneal@1 103 this.currentMonth = this.today.getMonth() + 1;
bgneal@1 104 this.currentYear = this.today.getFullYear();
bgneal@1 105 }
bgneal@1 106 Calendar.prototype = {
bgneal@1 107 drawCurrent: function() {
bgneal@1 108 CalendarNamespace.draw(this.currentMonth, this.currentYear, this.div_id, this.callback);
bgneal@1 109 },
bgneal@1 110 drawDate: function(month, year) {
bgneal@1 111 this.currentMonth = month;
bgneal@1 112 this.currentYear = year;
bgneal@1 113 this.drawCurrent();
bgneal@1 114 },
bgneal@1 115 drawPreviousMonth: function() {
bgneal@1 116 if (this.currentMonth == 1) {
bgneal@1 117 this.currentMonth = 12;
bgneal@1 118 this.currentYear--;
bgneal@1 119 }
bgneal@1 120 else {
bgneal@1 121 this.currentMonth--;
bgneal@1 122 }
bgneal@1 123 this.drawCurrent();
bgneal@1 124 },
bgneal@1 125 drawNextMonth: function() {
bgneal@1 126 if (this.currentMonth == 12) {
bgneal@1 127 this.currentMonth = 1;
bgneal@1 128 this.currentYear++;
bgneal@1 129 }
bgneal@1 130 else {
bgneal@1 131 this.currentMonth++;
bgneal@1 132 }
bgneal@1 133 this.drawCurrent();
bgneal@1 134 },
bgneal@1 135 drawPreviousYear: function() {
bgneal@1 136 this.currentYear--;
bgneal@1 137 this.drawCurrent();
bgneal@1 138 },
bgneal@1 139 drawNextYear: function() {
bgneal@1 140 this.currentYear++;
bgneal@1 141 this.drawCurrent();
bgneal@1 142 }
bgneal@1 143 }