www.gusucode.com > 一个基于extjs的强大聊天插件源码程序 > 一个基于extjs的强大聊天插件/extjame/ext-jame/js/ext2/source/util/Date.js
/*
* Ext JS Library 2.0.2
* Copyright(c) 2006-2008, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
/**
* @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.
*
* The following is a list of all currently supported formats:
*<pre>
Format Description Example returned values
------ ----------------------------------------------------------------------- -----------------------
d Day of the month, 2 digits with leading zeros 01 to 31
D A short textual representation of the day of the week Mon to Sun
j Day of the month without leading zeros 1 to 31
l A full textual representation of the day of the week Sunday to Saturday
N ISO-8601 numeric representation of the day of the week 1 (for Monday) through 7 (for Sunday)
S English ordinal suffix for the day of the month, 2 characters st, nd, rd or th. Works well with j
w Numeric representation of the day of the week 0 (for Sunday) to 6 (for Saturday)
z The day of the year (starting from 0) 0 to 364 (365 in leap years)
W ISO-8601 week number of year, weeks starting on Monday 01 to 53
F A full textual representation of a month, such as January or March January to December
m Numeric representation of a month, with leading zeros 01 to 12
M A short textual representation of a month Jan to Dec
n Numeric representation of a month, without leading zeros 1 to 12
t Number of days in the given month 28 to 31
L Whether it's a leap year 1 if it is a leap year, 0 otherwise.
o ISO-8601 year number (identical to (Y), but if the ISO week number (W) Examples: 1998 or 2004
belongs to the previous or next year, that year is used instead)
Y A full numeric representation of a year, 4 digits Examples: 1999 or 2003
y A two digit representation of a year Examples: 99 or 03
a Lowercase Ante meridiem and Post meridiem am or pm
A Uppercase Ante meridiem and Post meridiem AM or PM
g 12-hour format of an hour without leading zeros 1 to 12
G 24-hour format of an hour without leading zeros 0 to 23
h 12-hour format of an hour with leading zeros 01 to 12
H 24-hour format of an hour with leading zeros 00 to 23
i Minutes, with leading zeros 00 to 59
s Seconds, with leading zeros 00 to 59
u Milliseconds, with leading zeros 001 to 999
O Difference to Greenwich time (GMT) in hours and minutes Example: +1030
P Difference to Greenwich time (GMT) with colon between hours and minutes Example: -08:00
T Timezone abbreviation of the machine running the code Examples: EST, MDT, PDT ...
Z Timezone offset in seconds (negative if west of UTC, positive if east) -43200 to 50400
c ISO 8601 date 2007-04-17T15:19:21+08:00
U Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT) 1193432466 or -2138434463
</pre>
*
* Example usage (note that you must escape format specifiers with '\\' to render them as character literals):
* <pre><code>
// Sample date:
// 'Wed Jan 10 2007 15:05:01 GMT-0600 (Central Standard Time)'
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 jS 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/
*
*/
// 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(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.getShortDayName(this.getDay()) + "; // get L10n short day name
case "j":
return "this.getDate() + ";
case "l":
return "Date.dayNames[this.getDay()] + ";
case "N":
return "(this.getDay() ? this.getDay() : 7) + ";
case "S":
return "this.getSuffix() + ";
case "w":
return "this.getDay() + ";
case "z":
return "this.getDayOfYear() + ";
case "W":
return "String.leftPad(this.getWeekOfYear(), 2, '0') + ";
case "F":
return "Date.monthNames[this.getMonth()] + ";
case "m":
return "String.leftPad(this.getMonth() + 1, 2, '0') + ";
case "M":
return "Date.getShortMonthName(this.getMonth()) + "; // get L10n short month name
case "n":
return "(this.getMonth() + 1) + ";
case "t":
return "this.getDaysInMonth() + ";
case "L":
return "(this.isLeapYear() ? 1 : 0) + ";
case "o":
return "(this.getFullYear() + (this.getWeekOfYear() == 1 && this.getMonth() > 0 ? +1 : (this.getWeekOfYear() >= 52 && this.getMonth() < 11 ? -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 "u":
return "String.leftPad(this.getMilliseconds(), 3, '0') + ";
case "O":
return "this.getGMTOffset() + ";
case "P":
return "this.getGMTOffset(true) + ";
case "T":
return "this.getTimezone() + ";
case "Z":
return "(this.getTimezoneOffset() * -60) + ";
case "c":
for (var df = Date.getFormatCode, c = "Y-m-dTH:i:sP", code = "", i = 0, l = c.length; i < l; ++i) {
var e = c.charAt(i);
code += e == "T" ? "'T' + " : df(e); // treat T as a literal
}
return code;
case "U":
return "Math.round(this.getTime() / 1000) + ";
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("2006-01-15", "Y-m-d");
//dt = Sun Jan 15 2006 15:20:01 GMT-0600 (CST)
dt = Date.parseDate("2006-01-15 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, ms = -1, o, z, u, v;\n"
+ "input = String(input);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 (u)\n"
+ "{v = new Date(u * 1000);}" // give top priority to UNIX time
+ "else if (y >= 0 && m >= 0 && d > 0 && h >= 0 && i >= 0 && s >= 0 && ms >= 0)\n"
+ "{v = new Date(y, m, d, h, i, s, ms);}\n"
+ "else 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 + "$", "i");
eval(code);
};
// private
Date.formatCodeToRegex = function(character, currentGroup) {
/*
* currentGroup = position in regex result array
* g = calculation group (0 or 1. only group 1 contributes to date calculations.)
* c = calculation method (required for group 1. null for group 0.)
* s = regex string
*/
switch (character) {
case "d":
return {g:1,
c:"d = parseInt(results[" + currentGroup + "], 10);\n",
s:"(\\d{2})"}; // day of month with leading zeroes (01 - 31)
case "D":
for (var a = [], i = 0; i < 7; a.push(Date.getShortDayName(i)), ++i); // get L10n short day names
return {g:0,
c:null,
s:"(?:" + a.join("|") +")"};
case "j":
return {g:1,
c:"d = parseInt(results[" + currentGroup + "], 10);\n",
s:"(\\d{1,2})"}; // day of month without leading zeroes (1 - 31)
case "l":
return {g:0,
c:null,
s:"(?:" + Date.dayNames.join("|") + ")"};
case "N":
return {g:0,
c:null,
s:"[1-7]"}; // ISO-8601 day number (1 (monday) - 7 (sunday))
case "S":
return {g:0,
c:null,
s:"(?:st|nd|rd|th)"};
case "w":
return {g:0,
c:null,
s:"[0-6]"}; // javascript day number (0 (sunday) - 6 (saturday))
case "z":
return {g:0,
c:null,
s:"(?:\\d{1,3}"}; // day of the year (0 - 364 (365 in leap years))
case "W":
return {g:0,
c:null,
s:"(?:\\d{2})"}; // ISO-8601 week number (with leading zero)
case "F":
return {g:1,
c:"m = parseInt(Date.getMonthNumber(results[" + currentGroup + "]), 10);\n", // get L10n month number
s:"(" + Date.monthNames.join("|") + ")"};
case "m":
return {g:1,
c:"m = parseInt(results[" + currentGroup + "], 10) - 1;\n",
s:"(\\d{2})"}; // month number with leading zeros (01 - 12)
case "M":
for (var a = [], i = 0; i < 12; a.push(Date.getShortMonthName(i)), ++i); // get L10n short month names
return {g:1,
c:"m = parseInt(Date.getMonthNumber(results[" + currentGroup + "]), 10);\n", // get L10n month number
s:"(" + a.join("|") + ")"};
case "n":
return {g:1,
c:"m = parseInt(results[" + currentGroup + "], 10) - 1;\n",
s:"(\\d{1,2})"}; // month number without leading zeros (1 - 12)
case "t":
return {g:0,
c:null,
s:"(?:\\d{2})"}; // no. of days in the month (28 - 31)
case "L":
return {g:0,
c:null,
s:"(?:1|0)"};
case "o":
case "Y":
return {g:1,
c:"y = parseInt(results[" + currentGroup + "], 10);\n",
s:"(\\d{4})"}; // 4-digit year
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})"}; // 2-digit year
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})"}; // 24-hr format of an hour without leading zeroes (0 - 23)
case "h":
case "H":
return {g:1,
c:"h = parseInt(results[" + currentGroup + "], 10);\n",
s:"(\\d{2})"}; // 24-hr format of an hour with leading zeroes (00 - 23)
case "i":
return {g:1,
c:"i = parseInt(results[" + currentGroup + "], 10);\n",
s:"(\\d{2})"}; // minutes with leading zeros (00 - 59)
case "s":
return {g:1,
c:"s = parseInt(results[" + currentGroup + "], 10);\n",
s:"(\\d{2})"}; // seconds with leading zeros (00 - 59)
case "u":
return {g:1,
c:"ms = parseInt(results[" + currentGroup + "], 10);\n",
s:"(\\d{3})"}; // milliseconds with leading zeros (000 - 999)
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, just in case)
"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})"}; // GMT offset in hrs and mins
case "P":
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(4,6) / 60);\n", // get hours (performs minutes-to-hour conversion also, just in case)
"var mn = o.substring(4,6) % 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{2}:\\d{2})"}; // GMT offset in hrs and mins (with colon separator)
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 + "] * 1;\n" // -43200 <= UTC offset <= 50400
+ "z = (-43200 <= z && z <= 50400)? z : null;\n",
s:"([+\-]?\\d{1,5})"}; // leading '+' sign is optional for UTC offset
case "c":
var df = Date.formatCodeToRegex, calc = [];
var arr = [df("Y", 1), df("m", 2), df("d", 3), df("h", 4), df("i", 5), df("s", 6), df("P", 7)];
for (var i = 0, l = arr.length; i < l; ++i) {
calc.push(arr[i].c);
}
return {g:1,
c:calc.join(""),
s:arr[0].s + "-" + arr[1].s + "-" + arr[2].s + "T" + arr[3].s + ":" + arr[4].s + ":" + arr[5].s + arr[6].s};
case "U":
return {g:1,
c:"u = parseInt(results[" + currentGroup + "], 10);\n",
s:"(-?\\d+)"}; // leading minus sign indicates seconds before UNIX epoch
default:
return {g:0,
c:null,
s:Ext.escapeRe(character)};
}
};
/**
* Get the timezone abbreviation of the current date (equivalent to the format specifier 'T').
*
* Note: The date string returned by the javascript Date object's toString() method varies
* between browsers (e.g. FF vs IE) and system region settings (e.g. IE in Asia vs IE in America).
* For a given date string e.g. "Thu Oct 25 2007 22:55:35 GMT+0800 (Malay Peninsula Standard Time)",
* getTimezone() first tries to get the timezone abbreviation from between a pair of parentheses
* (which may or may not be present), failing which it proceeds to get the timezone abbreviation
* from the GMT offset portion of the date string.
* @return {String} The abbreviated timezone name (e.g. 'CST', 'PDT', 'EDT', 'MPST' ...).
*/
Date.prototype.getTimezone = function() {
// the following list shows the differences between date strings from different browsers on a WinXP SP2 machine from an Asian locale:
//
// Opera : "Thu, 25 Oct 2007 22:53:45 GMT+0800" -- shortest (weirdest) date string of the lot
// Safari : "Thu Oct 25 2007 22:55:35 GMT+0800 (Malay Peninsula Standard Time)" -- value in parentheses always gives the correct timezone (same as FF)
// FF : "Thu Oct 25 2007 22:55:35 GMT+0800 (Malay Peninsula Standard Time)" -- value in parentheses always gives the correct timezone
// IE : "Thu Oct 25 22:54:35 UTC+0800 2007" -- (Asian system setting) look for 3-4 letter timezone abbrev
// IE : "Thu Oct 25 17:06:37 PDT 2007" -- (American system setting) look for 3-4 letter timezone abbrev
//
// this crazy regex attempts to guess the correct timezone abbreviation despite these differences.
// step 1: (?:\((.*)\) -- find timezone in parentheses
// step 2: ([A-Z]{1,4})(?:[\-+][0-9]{4})?(?: -?\d+)?) -- if nothing was found in step 1, find timezone from timezone offset portion of date string
// step 3: remove all non uppercase characters found in step 1 and 2
return this.toString().replace(/^.* (?:\((.*)\)|([A-Z]{1,4})(?:[\-+][0-9]{4})?(?: -?\d+)?)$/, "$1$2").replace(/[^A-Z]/g, "");
};
/**
* Get the offset from GMT of the current date (equivalent to the format specifier 'O').
* @param {Boolean} colon true to separate the hours and minutes with a colon (defaults to false).
* @return {String} The 4-character offset string prefixed with + or - (e.g. '-0600').
*/
Date.prototype.getGMTOffset = function(colon) {
return (this.getTimezoneOffset() > 0 ? "-" : "+")
+ String.leftPad(Math.abs(Math.floor(this.getTimezoneOffset() / 60)), 2, "0")
+ (colon ? ":" : "")
+ String.leftPad(this.getTimezoneOffset() % 60, 2, "0");
};
/**
* Get the numeric day number of the year, adjusted for leap year.
* @return {Number} 0 to 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 numeric ISO-8601 week number of the year.
* (equivalent to the format specifier 'W', but without a leading zero).
* @return {Number} 1 to 53
*/
Date.prototype.getWeekOfYear = function() {
// adapted from http://www.merlyn.demon.co.uk/weekcalc.htm
var ms1d = 864e5; // milliseconds in a day
var ms7d = 7 * ms1d; // milliseconds in a week
var DC3 = Date.UTC(this.getFullYear(), this.getMonth(), this.getDate() + 3) / ms1d; // an Absolute Day Number
var AWN = Math.floor(DC3 / 7); // an Absolute Week Number
var Wyr = new Date(AWN * ms7d).getUTCFullYear();
return AWN - Math.floor(Date.UTC(Wyr, 0, 7) / ms7d) + 1;
};
/**
* 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 date of the first day of the month in which this date resides.
* @return {Date}
*/
Date.prototype.getFirstDateOfMonth = function() {
return new Date(this.getFullYear(), this.getMonth(), 1);
};
/**
* Get the date of the last day of the month in which this date resides.
* @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"];
/**
* Get the short month name for the given month number.
* Override this function for international dates.
* @param {Number} month A zero-based javascript month number.
* @return {String} The short month name.
* @static
*/
Date.getShortMonthName = function(month) {
return Date.monthNames[month].substring(0, 3);
}
/**
* 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"];
/**
* Get the short day name for the given day number.
* Override this function for international dates.
* @param {Number} day A zero-based javascript day number.
* @return {String} The short day name.
* @static
*/
Date.getShortDayName = function(day) {
return Date.dayNames[day].substring(0, 3);
}
// private
Date.y2kYear = 50;
/**
* An object hash of zero-based javascript month numbers (with short month names as keys. note: keys are case-sensitive).
* Override these values for international dates, for example...
* Date.monthNumbers = {'ShortJanNameInYourLang':0, 'ShortFebNameInYourLang':1, ...};
* @type Object
* @static
*/
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};
/**
* Get the zero-based javascript month number for the given short/full month name.
* Override this function for international dates.
* @param {String} name The short/full month name.
* @return {Number} The zero-based javascript month number.
* @static
*/
Date.getMonthNumber = function(name) {
// handle camel casing for english month names (since the keys for the Date.monthNumbers hash are case sensitive)
return Date.monthNumbers[name.substring(0, 1).toUpperCase() + name.substring(1, 3).toLowerCase()];
}
/**
* 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 (defaults to false).
@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(Ext.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;
};
/**
* Checks if this date falls on or between the given start and end dates.
* @param {Date} start Start date
* @param {Date} end End date
* @return {Boolean} true if this date falls on or between the given start and end dates.
*/
Date.prototype.between = function(start, end){
var t = this.getTime();
return start.getTime() <= t && t <= end.getTime();
}