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Re-written date functions to not use eval()
/*
* Copyright (C) 2004 Baron Schwartz <baron at sequent dot org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation, version 2.1.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*/
Date.parseFunctions = {count: 0};
Date.parseRegexes = [];
Date.formatFunctions = {count: 0};
Date.prototype.dateFormat = function (format) {
return Date.createNewFormat.call(this, format);
};
Date.createNewFormat = function (format) {
var funcName = "format" + Date.formatFunctions.count++,
code = "",
special = false,
ch = '',
i = 0;
Date.formatFunctions[format] = funcName;
for (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.call(this, ch);
}
}
return code;
};
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 "T":
return this.getTimezone();
case "Z":
return (this.getTimezoneOffset() * -60);
default:
return String.escape(character);
}
};
Date.parseDate = function (input, format) {
return new Date(input);
};
Date.prototype.getTimezone = function() {
return this.toString().replace(
/^.*? ([A-Z]{3}) [0-9]{4}.*$/, "$1").replace(
/^.*?\(([A-Z])[a-z]+ ([A-Z])[a-z]+ ([A-Z])[a-z]+\)$/, "$1$2$3");
}
Date.prototype.getGMTOffset = function() {
return (this.getTimezoneOffset() > 0 ? "-" : "+")
+ String.leftPad(Math.floor(this.getTimezoneOffset() / 60), 2, "0")
+ String.leftPad(this.getTimezoneOffset() % 60, 2, "0");
}
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;
}
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);
document.write(then);
return String.leftPad(((now - then) / 7) + 1, 2, "0");
}
Date.prototype.isLeapYear = function() {
var year = this.getFullYear();
return ((year & 3) == 0 && (year % 100 || (year % 400 == 0 && year)));
}
Date.prototype.getFirstDayOfMonth = function() {
var day = (this.getDay() - (this.getDate() - 1)) % 7;
return (day < 0) ? (day + 7) : day;
}
Date.prototype.getLastDayOfMonth = function() {
var day = (this.getDay() + (Date.daysInMonth[this.getMonth()] - this.getDate())) % 7;
return (day < 0) ? (day + 7) : day;
}
Date.prototype.getDaysInMonth = function() {
Date.daysInMonth[1] = this.isLeapYear() ? 29 : 28;
return Date.daysInMonth[this.getMonth()];
}
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";
}
}
String.escape = function(string) {
return string.replace(/('|\\)/g, "\\$1");
}
String.leftPad = function (val, size, ch) {
var result = new String(val);
if (ch == null) {
ch = " ";
}
while (result.length < size) {
result = ch + result;
}
return result;
}
Date.daysInMonth = [31,28,31,30,31,30,31,31,30,31,30,31];
Date.monthNames =
["January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"];
Date.dayNames =
["Sunday",
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday"];
Date.y2kYear = 50;
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};
Date.patterns = {
ISO8601LongPattern:"Y-m-d H:i:s",
ISO8601ShortPattern:"Y-m-d",
ShortDatePattern: "n/j/Y",
LongDatePattern: "l, F d, Y",
FullDateTimePattern: "l, F d, Y g:i:s A",
MonthDayPattern: "F d",
ShortTimePattern: "g:i A",
LongTimePattern: "g:i:s A",
SortableDateTimePattern: "Y-m-d\\TH:i:s",
UniversalSortableDateTimePattern: "Y-m-d H:i:sO",
YearMonthPattern: "F, Y"};
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