--- /dev/null
+/*
+ * Based on:
+ * Ext JS Library 1.1.1
+ * Copyright(c) 2006-2007, Ext JS, LLC.
+ *
+ * Originally Released Under LGPL - original licence link has changed is not relivant.
+ *
+ * Fork - LGPL
+ * <script type="text/javascript">
+ */
+
+/**
+ * @class Date
+ *
+ * The date parsing and format syntax is a subset of
+ * <a href="http://www.php.net/date">PHP's date() function</a>, and the formats that are
+ * supported will provide results equivalent to their PHP versions.
+ *
+ * Following is the list of all currently supported formats:
+ *<pre>
+Sample date:
+'Wed Jan 10 2007 15:05:01 GMT-0600 (Central Standard Time)'
+
+Format Output Description
+------ ---------- --------------------------------------------------------------
+ d 10 Day of the month, 2 digits with leading zeros
+ D Wed A textual representation of a day, three letters
+ j 10 Day of the month without leading zeros
+ l Wednesday A full textual representation of the day of the week
+ S th English ordinal day of month suffix, 2 chars (use with j)
+ w 3 Numeric representation of the day of the week
+ z 9 The julian date, or day of the year (0-365)
+ W 01 ISO-8601 2-digit week number of year, weeks starting on Monday (00-52)
+ F January A full textual representation of the month
+ m 01 Numeric representation of a month, with leading zeros
+ M Jan Month name abbreviation, three letters
+ n 1 Numeric representation of a month, without leading zeros
+ t 31 Number of days in the given month
+ L 0 Whether it's a leap year (1 if it is a leap year, else 0)
+ Y 2007 A full numeric representation of a year, 4 digits
+ y 07 A two digit representation of a year
+ a pm Lowercase Ante meridiem and Post meridiem
+ A PM Uppercase Ante meridiem and Post meridiem
+ g 3 12-hour format of an hour without leading zeros
+ G 15 24-hour format of an hour without leading zeros
+ h 03 12-hour format of an hour with leading zeros
+ H 15 24-hour format of an hour with leading zeros
+ i 05 Minutes with leading zeros
+ s 01 Seconds, with leading zeros
+ O -0600 Difference to Greenwich time (GMT) in hours
+ P -06:00 Difference to Greenwich time (GMT) with colon between hours and minutes
+ T CST Timezone setting of the machine running the code
+ Z -21600 Timezone offset in seconds (negative if west of UTC, positive if east)
+</pre>
+ *
+ * Example usage (note that you must escape format specifiers with '\\' to render them as character literals):
+ * <pre><code>
+var dt = new Date('1/10/2007 03:05:01 PM GMT-0600');
+document.write(dt.format('Y-m-d')); //2007-01-10
+document.write(dt.format('F j, Y, g:i a')); //January 10, 2007, 3:05 pm
+document.write(dt.format('l, \\t\\he dS of F Y h:i:s A')); //Wednesday, the 10th of January 2007 03:05:01 PM
+ </code></pre>
+ *
+ * Here are some standard date/time patterns that you might find helpful. They
+ * are not part of the source of Date.js, but to use them you can simply copy this
+ * block of code into any script that is included after Date.js and they will also become
+ * globally available on the Date object. Feel free to add or remove patterns as needed in your code.
+ * <pre><code>
+Date.patterns = {
+ ISO8601Long:"Y-m-d H:i:s",
+ ISO8601Short:"Y-m-d",
+ ShortDate: "n/j/Y",
+ LongDate: "l, F d, Y",
+ FullDateTime: "l, F d, Y g:i:s A",
+ MonthDay: "F d",
+ ShortTime: "g:i A",
+ LongTime: "g:i:s A",
+ SortableDateTime: "Y-m-d\\TH:i:s",
+ UniversalSortableDateTime: "Y-m-d H:i:sO",
+ YearMonth: "F, Y"
+};
+</code></pre>
+ *
+ * Example usage:
+ * <pre><code>
+var dt = new Date();
+document.write(dt.format(Date.patterns.ShortDate));
+ </code></pre>
+ */
+
+/*
+ * Most of the date-formatting functions below are the excellent work of Baron Schwartz.
+ * They generate precompiled functions from date formats instead of parsing and
+ * processing the pattern every time you format a date. These functions are available
+ * on every Date object (any javascript function).
+ *
+ * The original article and download are here:
+ * http://www.xaprb.com/blog/2005/12/12/javascript-closures-for-runtime-efficiency/
+ *
+ */
+
+
+ // was in core
+/**
+ Returns the number of milliseconds between this date and date
+ @param {Date} date (optional) Defaults to now
+ @return {Number} The diff in milliseconds
+ @member Date getElapsed
+ */
+Date.prototype.getElapsed = function(date) {
+ return Math.abs((date || new Date()).getTime()-this.getTime());
+};
+// was in date file..
+
+
+// private
+Date.parseFunctions = {count:0};
+// private
+Date.parseRegexes = [];
+// private
+Date.formatFunctions = {count:0};
+
+// private
+Date.prototype.dateFormat = function(format) {
+ if (Date.formatFunctions[format] == null) {
+ Date.createNewFormat(format);
+ }
+ var func = Date.formatFunctions[format];
+ return this[func]();
+};
+
+
+/**
+ * Formats a date given the supplied format string
+ * @param {String} format The format string
+ * @return {String} The formatted date
+ * @method
+ */
+Date.prototype.format = Date.prototype.dateFormat;
+
+// private
+Date.createNewFormat = function(format) {
+ var funcName = "format" + Date.formatFunctions.count++;
+ Date.formatFunctions[format] = funcName;
+ var code = "Date.prototype." + funcName + " = function(){return ";
+ var special = false;
+ var ch = '';
+ for (var i = 0; i < format.length; ++i) {
+ ch = format.charAt(i);
+ if (!special && ch == "\\") {
+ special = true;
+ }
+ else if (special) {
+ special = false;
+ code += "'" + String.escape(ch) + "' + ";
+ }
+ else {
+ code += Date.getFormatCode(ch);
+ }
+ }
+ /** eval:var:zzzzzzzzzzzzz */
+ eval(code.substring(0, code.length - 3) + ";}");
+};
+
+// private
+Date.getFormatCode = function(character) {
+ switch (character) {
+ case "d":
+ return "String.leftPad(this.getDate(), 2, '0') + ";
+ case "D":
+ return "Date.dayNames[this.getDay()].substring(0, 3) + ";
+ case "j":
+ return "this.getDate() + ";
+ case "l":
+ return "Date.dayNames[this.getDay()] + ";
+ case "S":
+ return "this.getSuffix() + ";
+ case "w":
+ return "this.getDay() + ";
+ case "z":
+ return "this.getDayOfYear() + ";
+ case "W":
+ return "this.getWeekOfYear() + ";
+ case "F":
+ return "Date.monthNames[this.getMonth()] + ";
+ case "m":
+ return "String.leftPad(this.getMonth() + 1, 2, '0') + ";
+ case "M":
+ return "Date.monthNames[this.getMonth()].substring(0, 3) + ";
+ case "n":
+ return "(this.getMonth() + 1) + ";
+ case "t":
+ return "this.getDaysInMonth() + ";
+ case "L":
+ return "(this.isLeapYear() ? 1 : 0) + ";
+ case "Y":
+ return "this.getFullYear() + ";
+ case "y":
+ return "('' + this.getFullYear()).substring(2, 4) + ";
+ case "a":
+ return "(this.getHours() < 12 ? 'am' : 'pm') + ";
+ case "A":
+ return "(this.getHours() < 12 ? 'AM' : 'PM') + ";
+ case "g":
+ return "((this.getHours() % 12) ? this.getHours() % 12 : 12) + ";
+ case "G":
+ return "this.getHours() + ";
+ case "h":
+ return "String.leftPad((this.getHours() % 12) ? this.getHours() % 12 : 12, 2, '0') + ";
+ case "H":
+ return "String.leftPad(this.getHours(), 2, '0') + ";
+ case "i":
+ return "String.leftPad(this.getMinutes(), 2, '0') + ";
+ case "s":
+ return "String.leftPad(this.getSeconds(), 2, '0') + ";
+ case "O":
+ return "this.getGMTOffset() + ";
+ case "P":
+ return "this.getGMTColonOffset() + ";
+ case "T":
+ return "this.getTimezone() + ";
+ case "Z":
+ return "(this.getTimezoneOffset() * -60) + ";
+ default:
+ return "'" + String.escape(character) + "' + ";
+ }
+};
+
+/**
+ * Parses the passed string using the specified format. Note that this function expects dates in normal calendar
+ * format, meaning that months are 1-based (1 = January) and not zero-based like in JavaScript dates. Any part of
+ * the date format that is not specified will default to the current date value for that part. Time parts can also
+ * be specified, but default to 0. Keep in mind that the input date string must precisely match the specified format
+ * string or the parse operation will fail.
+ * Example Usage:
+<pre><code>
+//dt = Fri May 25 2007 (current date)
+var dt = new Date();
+
+//dt = Thu May 25 2006 (today's month/day in 2006)
+dt = Date.parseDate("2006", "Y");
+
+//dt = Sun Jan 15 2006 (all date parts specified)
+dt = Date.parseDate("2006-1-15", "Y-m-d");
+
+//dt = Sun Jan 15 2006 15:20:01 GMT-0600 (CST)
+dt = Date.parseDate("2006-1-15 3:20:01 PM", "Y-m-d h:i:s A" );
+</code></pre>
+ * @param {String} input The unparsed date as a string
+ * @param {String} format The format the date is in
+ * @return {Date} The parsed date
+ * @static
+ */
+Date.parseDate = function(input, format) {
+ if (Date.parseFunctions[format] == null) {
+ Date.createParser(format);
+ }
+ var func = Date.parseFunctions[format];
+ return Date[func](input);
+};
+/**
+ * @private
+ */
+Date.createParser = function(format) {
+ var funcName = "parse" + Date.parseFunctions.count++;
+ var regexNum = Date.parseRegexes.length;
+ var currentGroup = 1;
+ Date.parseFunctions[format] = funcName;
+
+ var code = "Date." + funcName + " = function(input){\n"
+ + "var y = -1, m = -1, d = -1, h = -1, i = -1, s = -1, o, z, v;\n"
+ + "var d = new Date();\n"
+ + "y = d.getFullYear();\n"
+ + "m = d.getMonth();\n"
+ + "d = d.getDate();\n"
+ + "var results = input.match(Date.parseRegexes[" + regexNum + "]);\n"
+ + "if (results && results.length > 0) {";
+ var regex = "";
+
+ var special = false;
+ var ch = '';
+ for (var i = 0; i < format.length; ++i) {
+ ch = format.charAt(i);
+ if (!special && ch == "\\") {
+ special = true;
+ }
+ else if (special) {
+ special = false;
+ regex += String.escape(ch);
+ }
+ else {
+ var obj = Date.formatCodeToRegex(ch, currentGroup);
+ currentGroup += obj.g;
+ regex += obj.s;
+ if (obj.g && obj.c) {
+ code += obj.c;
+ }
+ }
+ }
+
+ code += "if (y >= 0 && m >= 0 && d > 0 && h >= 0 && i >= 0 && s >= 0)\n"
+ + "{v = new Date(y, m, d, h, i, s);}\n"
+ + "else if (y >= 0 && m >= 0 && d > 0 && h >= 0 && i >= 0)\n"
+ + "{v = new Date(y, m, d, h, i);}\n"
+ + "else if (y >= 0 && m >= 0 && d > 0 && h >= 0)\n"
+ + "{v = new Date(y, m, d, h);}\n"
+ + "else if (y >= 0 && m >= 0 && d > 0)\n"
+ + "{v = new Date(y, m, d);}\n"
+ + "else if (y >= 0 && m >= 0)\n"
+ + "{v = new Date(y, m);}\n"
+ + "else if (y >= 0)\n"
+ + "{v = new Date(y);}\n"
+ + "}return (v && (z || o))?\n" // favour UTC offset over GMT offset
+ + " ((z)? v.add(Date.SECOND, (v.getTimezoneOffset() * 60) + (z*1)) :\n" // reset to UTC, then add offset
+ + " v.add(Date.HOUR, (v.getGMTOffset() / 100) + (o / -100))) : v\n" // reset to GMT, then add offset
+ + ";}";
+
+ Date.parseRegexes[regexNum] = new RegExp("^" + regex + "$");
+ /** eval:var:zzzzzzzzzzzzz */
+ eval(code);
+};
+
+// private
+Date.formatCodeToRegex = function(character, currentGroup) {
+ switch (character) {
+ case "D":
+ return {g:0,
+ c:null,
+ s:"(?:Sun|Mon|Tue|Wed|Thu|Fri|Sat)"};
+ case "j":
+ return {g:1,
+ c:"d = parseInt(results[" + currentGroup + "], 10);\n",
+ s:"(\\d{1,2})"}; // day of month without leading zeroes
+ case "d":
+ return {g:1,
+ c:"d = parseInt(results[" + currentGroup + "], 10);\n",
+ s:"(\\d{2})"}; // day of month with leading zeroes
+ case "l":
+ return {g:0,
+ c:null,
+ s:"(?:" + Date.dayNames.join("|") + ")"};
+ case "S":
+ return {g:0,
+ c:null,
+ s:"(?:st|nd|rd|th)"};
+ case "w":
+ return {g:0,
+ c:null,
+ s:"\\d"};
+ case "z":
+ return {g:0,
+ c:null,
+ s:"(?:\\d{1,3})"};
+ case "W":
+ return {g:0,
+ c:null,
+ s:"(?:\\d{2})"};
+ case "F":
+ return {g:1,
+ c:"m = parseInt(Date.monthNumbers[results[" + currentGroup + "].substring(0, 3)], 10);\n",
+ s:"(" + Date.monthNames.join("|") + ")"};
+ case "M":
+ return {g:1,
+ c:"m = parseInt(Date.monthNumbers[results[" + currentGroup + "]], 10);\n",
+ s:"(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)"};
+ case "n":
+ return {g:1,
+ c:"m = parseInt(results[" + currentGroup + "], 10) - 1;\n",
+ s:"(\\d{1,2})"}; // Numeric representation of a month, without leading zeros
+ case "m":
+ return {g:1,
+ c:"m = parseInt(results[" + currentGroup + "], 10) - 1;\n",
+ s:"(\\d{2})"}; // Numeric representation of a month, with leading zeros
+ case "t":
+ return {g:0,
+ c:null,
+ s:"\\d{1,2}"};
+ case "L":
+ return {g:0,
+ c:null,
+ s:"(?:1|0)"};
+ case "Y":
+ return {g:1,
+ c:"y = parseInt(results[" + currentGroup + "], 10);\n",
+ s:"(\\d{4})"};
+ case "y":
+ return {g:1,
+ c:"var ty = parseInt(results[" + currentGroup + "], 10);\n"
+ + "y = ty > Date.y2kYear ? 1900 + ty : 2000 + ty;\n",
+ s:"(\\d{1,2})"};
+ case "a":
+ return {g:1,
+ c:"if (results[" + currentGroup + "] == 'am') {\n"
+ + "if (h == 12) { h = 0; }\n"
+ + "} else { if (h < 12) { h += 12; }}",
+ s:"(am|pm)"};
+ case "A":
+ return {g:1,
+ c:"if (results[" + currentGroup + "] == 'AM') {\n"
+ + "if (h == 12) { h = 0; }\n"
+ + "} else { if (h < 12) { h += 12; }}",
+ s:"(AM|PM)"};
+ case "g":
+ case "G":
+ return {g:1,
+ c:"h = parseInt(results[" + currentGroup + "], 10);\n",
+ s:"(\\d{1,2})"}; // 12/24-hr format format of an hour without leading zeroes
+ case "h":
+ case "H":
+ return {g:1,
+ c:"h = parseInt(results[" + currentGroup + "], 10);\n",
+ s:"(\\d{2})"}; // 12/24-hr format format of an hour with leading zeroes
+ case "i":
+ return {g:1,
+ c:"i = parseInt(results[" + currentGroup + "], 10);\n",
+ s:"(\\d{2})"};
+ case "s":
+ return {g:1,
+ c:"s = parseInt(results[" + currentGroup + "], 10);\n",
+ s:"(\\d{2})"};
+ case "O":
+ return {g:1,
+ c:[
+ "o = results[", currentGroup, "];\n",
+ "var sn = o.substring(0,1);\n", // get + / - sign
+ "var hr = o.substring(1,3)*1 + Math.floor(o.substring(3,5) / 60);\n", // get hours (performs minutes-to-hour conversion also)
+ "var mn = o.substring(3,5) % 60;\n", // get minutes
+ "o = ((-12 <= (hr*60 + mn)/60) && ((hr*60 + mn)/60 <= 14))?\n", // -12hrs <= GMT offset <= 14hrs
+ " (sn + String.leftPad(hr, 2, 0) + String.leftPad(mn, 2, 0)) : null;\n"
+ ].join(""),
+ s:"([+\-]\\d{4})"};
+ case "P":
+ return {g:1,
+ c:[
+ "o = results[", currentGroup, "];\n",
+ "var sn = o.substring(0,1);\n",
+ "var hr = o.substring(1,3)*1 + Math.floor(o.substring(4,6) / 60);\n",
+ "var mn = o.substring(4,6) % 60;\n",
+ "o = ((-12 <= (hr*60 + mn)/60) && ((hr*60 + mn)/60 <= 14))?\n",
+ " (sn + String.leftPad(hr, 2, 0) + String.leftPad(mn, 2, 0)) : null;\n"
+ ].join(""),
+ s:"([+\-]\\d{4})"};
+ case "T":
+ return {g:0,
+ c:null,
+ s:"[A-Z]{1,4}"}; // timezone abbrev. may be between 1 - 4 chars
+ case "Z":
+ return {g:1,
+ c:"z = results[" + currentGroup + "];\n" // -43200 <= UTC offset <= 50400
+ + "z = (-43200 <= z*1 && z*1 <= 50400)? z : null;\n",
+ s:"([+\-]?\\d{1,5})"}; // leading '+' sign is optional for UTC offset
+ default:
+ return {g:0,
+ c:null,
+ s:String.escape(character)};
+ }
+};
+
+/**
+ * Get the timezone abbreviation of the current date (equivalent to the format specifier 'T').
+ * @return {String} The abbreviated timezone name (e.g. 'CST')
+ */
+Date.prototype.getTimezone = function() {
+ return this.toString().replace(/^.*? ([A-Z]{1,4})[\-+][0-9]{4} .*$/, "$1");
+};
+
+/**
+ * Get the offset from GMT of the current date (equivalent to the format specifier 'O').
+ * @return {String} The 4-character offset string prefixed with + or - (e.g. '-0600')
+ */
+Date.prototype.getGMTOffset = function() {
+ return (this.getTimezoneOffset() > 0 ? "-" : "+")
+ + String.leftPad(Math.abs(Math.floor(this.getTimezoneOffset() / 60)), 2, "0")
+ + String.leftPad(this.getTimezoneOffset() % 60, 2, "0");
+};
+
+/**
+ * Get the offset from GMT of the current date (equivalent to the format specifier 'P').
+ * @return {String} 2-characters representing hours and 2-characters representing minutes
+ * seperated by a colon and prefixed with + or - (e.g. '-06:00')
+ */
+Date.prototype.getGMTColonOffset = function() {
+ return (this.getTimezoneOffset() > 0 ? "-" : "+")
+ + String.leftPad(Math.abs(Math.floor(this.getTimezoneOffset() / 60)), 2, "0")
+ + ":"
+ + String.leftPad(this.getTimezoneOffset() %60, 2, "0");
+}
+
+/**
+ * Get the numeric day number of the year, adjusted for leap year.
+ * @return {Number} 0 through 364 (365 in leap years)
+ */
+Date.prototype.getDayOfYear = function() {
+ var num = 0;
+ Date.daysInMonth[1] = this.isLeapYear() ? 29 : 28;
+ for (var i = 0; i < this.getMonth(); ++i) {
+ num += Date.daysInMonth[i];
+ }
+ return num + this.getDate() - 1;
+};
+
+/**
+ * Get the string representation of the numeric week number of the year
+ * (equivalent to the format specifier 'W').
+ * @return {String} '00' through '52'
+ */
+Date.prototype.getWeekOfYear = function() {
+ // Skip to Thursday of this week
+ var now = this.getDayOfYear() + (4 - this.getDay());
+ // Find the first Thursday of the year
+ var jan1 = new Date(this.getFullYear(), 0, 1);
+ var then = (7 - jan1.getDay() + 4);
+ return String.leftPad(((now - then) / 7) + 1, 2, "0");
+};
+
+/**
+ * Whether or not the current date is in a leap year.
+ * @return {Boolean} True if the current date is in a leap year, else false
+ */
+Date.prototype.isLeapYear = function() {
+ var year = this.getFullYear();
+ return ((year & 3) == 0 && (year % 100 || (year % 400 == 0 && year)));
+};
+
+/**
+ * Get the first day of the current month, adjusted for leap year. The returned value
+ * is the numeric day index within the week (0-6) which can be used in conjunction with
+ * the {@link #monthNames} array to retrieve the textual day name.
+ * Example:
+ *<pre><code>
+var dt = new Date('1/10/2007');
+document.write(Date.dayNames[dt.getFirstDayOfMonth()]); //output: 'Monday'
+</code></pre>
+ * @return {Number} The day number (0-6)
+ */
+Date.prototype.getFirstDayOfMonth = function() {
+ var day = (this.getDay() - (this.getDate() - 1)) % 7;
+ return (day < 0) ? (day + 7) : day;
+};
+
+/**
+ * Get the last day of the current month, adjusted for leap year. The returned value
+ * is the numeric day index within the week (0-6) which can be used in conjunction with
+ * the {@link #monthNames} array to retrieve the textual day name.
+ * Example:
+ *<pre><code>
+var dt = new Date('1/10/2007');
+document.write(Date.dayNames[dt.getLastDayOfMonth()]); //output: 'Wednesday'
+</code></pre>
+ * @return {Number} The day number (0-6)
+ */
+Date.prototype.getLastDayOfMonth = function() {
+ var day = (this.getDay() + (Date.daysInMonth[this.getMonth()] - this.getDate())) % 7;
+ return (day < 0) ? (day + 7) : day;
+};
+
+
+/**
+ * Get the first date of this date's month
+ * @return {Date}
+ */
+Date.prototype.getFirstDateOfMonth = function() {
+ return new Date(this.getFullYear(), this.getMonth(), 1);
+};
+
+/**
+ * Get the last date of this date's month
+ * @return {Date}
+ */
+Date.prototype.getLastDateOfMonth = function() {
+ return new Date(this.getFullYear(), this.getMonth(), this.getDaysInMonth());
+};
+/**
+ * Get the number of days in the current month, adjusted for leap year.
+ * @return {Number} The number of days in the month
+ */
+Date.prototype.getDaysInMonth = function() {
+ Date.daysInMonth[1] = this.isLeapYear() ? 29 : 28;
+ return Date.daysInMonth[this.getMonth()];
+};
+
+/**
+ * Get the English ordinal suffix of the current day (equivalent to the format specifier 'S').
+ * @return {String} 'st, 'nd', 'rd' or 'th'
+ */
+Date.prototype.getSuffix = function() {
+ switch (this.getDate()) {
+ case 1:
+ case 21:
+ case 31:
+ return "st";
+ case 2:
+ case 22:
+ return "nd";
+ case 3:
+ case 23:
+ return "rd";
+ default:
+ return "th";
+ }
+};
+
+// private
+Date.daysInMonth = [31,28,31,30,31,30,31,31,30,31,30,31];
+
+/**
+ * An array of textual month names.
+ * Override these values for international dates, for example...
+ * Date.monthNames = ['JanInYourLang', 'FebInYourLang', ...];
+ * @type Array
+ * @static
+ */
+Date.monthNames =
+ ["January",
+ "February",
+ "March",
+ "April",
+ "May",
+ "June",
+ "July",
+ "August",
+ "September",
+ "October",
+ "November",
+ "December"];
+
+/**
+ * An array of textual day names.
+ * Override these values for international dates, for example...
+ * Date.dayNames = ['SundayInYourLang', 'MondayInYourLang', ...];
+ * @type Array
+ * @static
+ */
+Date.dayNames =
+ ["Sunday",
+ "Monday",
+ "Tuesday",
+ "Wednesday",
+ "Thursday",
+ "Friday",
+ "Saturday"];
+
+// private
+Date.y2kYear = 50;
+// private
+Date.monthNumbers = {
+ Jan:0,
+ Feb:1,
+ Mar:2,
+ Apr:3,
+ May:4,
+ Jun:5,
+ Jul:6,
+ Aug:7,
+ Sep:8,
+ Oct:9,
+ Nov:10,
+ Dec:11};
+
+/**
+ * Creates and returns a new Date instance with the exact same date value as the called instance.
+ * Dates are copied and passed by reference, so if a copied date variable is modified later, the original
+ * variable will also be changed. When the intention is to create a new variable that will not
+ * modify the original instance, you should create a clone.
+ *
+ * Example of correctly cloning a date:
+ * <pre><code>
+//wrong way:
+var orig = new Date('10/1/2006');
+var copy = orig;
+copy.setDate(5);
+document.write(orig); //returns 'Thu Oct 05 2006'!
+
+//correct way:
+var orig = new Date('10/1/2006');
+var copy = orig.clone();
+copy.setDate(5);
+document.write(orig); //returns 'Thu Oct 01 2006'
+</code></pre>
+ * @return {Date} The new Date instance
+ */
+Date.prototype.clone = function() {
+ return new Date(this.getTime());
+};
+
+/**
+ * Clears any time information from this date
+ @param {Boolean} clone true to create a clone of this date, clear the time and return it
+ @return {Date} this or the clone
+ */
+Date.prototype.clearTime = function(clone){
+ if(clone){
+ return this.clone().clearTime();
+ }
+ this.setHours(0);
+ this.setMinutes(0);
+ this.setSeconds(0);
+ this.setMilliseconds(0);
+ return this;
+};
+
+// private
+// safari setMonth is broken
+if(Roo.isSafari){
+ Date.brokenSetMonth = Date.prototype.setMonth;
+ Date.prototype.setMonth = function(num){
+ if(num <= -1){
+ var n = Math.ceil(-num);
+ var back_year = Math.ceil(n/12);
+ var month = (n % 12) ? 12 - n % 12 : 0 ;
+ this.setFullYear(this.getFullYear() - back_year);
+ return Date.brokenSetMonth.call(this, month);
+ } else {
+ return Date.brokenSetMonth.apply(this, arguments);
+ }
+ };
+}
+
+/** Date interval constant
+* @static
+* @type String */
+Date.MILLI = "ms";
+/** Date interval constant
+* @static
+* @type String */
+Date.SECOND = "s";
+/** Date interval constant
+* @static
+* @type String */
+Date.MINUTE = "mi";
+/** Date interval constant
+* @static
+* @type String */
+Date.HOUR = "h";
+/** Date interval constant
+* @static
+* @type String */
+Date.DAY = "d";
+/** Date interval constant
+* @static
+* @type String */
+Date.MONTH = "mo";
+/** Date interval constant
+* @static
+* @type String */
+Date.YEAR = "y";
+
+/**
+ * Provides a convenient method of performing basic date arithmetic. This method
+ * does not modify the Date instance being called - it creates and returns
+ * a new Date instance containing the resulting date value.
+ *
+ * Examples:
+ * <pre><code>
+//Basic usage:
+var dt = new Date('10/29/2006').add(Date.DAY, 5);
+document.write(dt); //returns 'Fri Oct 06 2006 00:00:00'
+
+//Negative values will subtract correctly:
+var dt2 = new Date('10/1/2006').add(Date.DAY, -5);
+document.write(dt2); //returns 'Tue Sep 26 2006 00:00:00'
+
+//You can even chain several calls together in one line!
+var dt3 = new Date('10/1/2006').add(Date.DAY, 5).add(Date.HOUR, 8).add(Date.MINUTE, -30);
+document.write(dt3); //returns 'Fri Oct 06 2006 07:30:00'
+ </code></pre>
+ *
+ * @param {String} interval A valid date interval enum value
+ * @param {Number} value The amount to add to the current date
+ * @return {Date} The new Date instance
+ */
+Date.prototype.add = function(interval, value){
+ var d = this.clone();
+ if (!interval || value === 0) return d;
+ switch(interval.toLowerCase()){
+ case Date.MILLI:
+ d.setMilliseconds(this.getMilliseconds() + value);
+ break;
+ case Date.SECOND:
+ d.setSeconds(this.getSeconds() + value);
+ break;
+ case Date.MINUTE:
+ d.setMinutes(this.getMinutes() + value);
+ break;
+ case Date.HOUR:
+ d.setHours(this.getHours() + value);
+ break;
+ case Date.DAY:
+ d.setDate(this.getDate() + value);
+ break;
+ case Date.MONTH:
+ var day = this.getDate();
+ if(day > 28){
+ day = Math.min(day, this.getFirstDateOfMonth().add('mo', value).getLastDateOfMonth().getDate());
+ }
+ d.setDate(day);
+ d.setMonth(this.getMonth() + value);
+ break;
+ case Date.YEAR:
+ d.setFullYear(this.getFullYear() + value);
+ break;
+ }
+ return d;
+};
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