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source: trunk/workshop-routing-foss4g/web/ext/src/util/Date.js @ 76

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1/*!
2 * Ext JS Library 3.4.0
3 * Copyright(c) 2006-2011 Sencha Inc.
4 * licensing@sencha.com
5 * http://www.sencha.com/license
6 */
7/**
8 * @class Date
9 *
10 * The date parsing and formatting syntax contains a subset of
11 * <a href="http://www.php.net/date">PHP's date() function</a>, and the formats that are
12 * supported will provide results equivalent to their PHP versions.
13 *
14 * The following is a list of all currently supported formats:
15 * <pre>
16Format  Description                                                               Example returned values
17------  -----------------------------------------------------------------------   -----------------------
18  d     Day of the month, 2 digits with leading zeros                             01 to 31
19  D     A short textual representation of the day of the week                     Mon to Sun
20  j     Day of the month without leading zeros                                    1 to 31
21  l     A full textual representation of the day of the week                      Sunday to Saturday
22  N     ISO-8601 numeric representation of the day of the week                    1 (for Monday) through 7 (for Sunday)
23  S     English ordinal suffix for the day of the month, 2 characters             st, nd, rd or th. Works well with j
24  w     Numeric representation of the day of the week                             0 (for Sunday) to 6 (for Saturday)
25  z     The day of the year (starting from 0)                                     0 to 364 (365 in leap years)
26  W     ISO-8601 week number of year, weeks starting on Monday                    01 to 53
27  F     A full textual representation of a month, such as January or March        January to December
28  m     Numeric representation of a month, with leading zeros                     01 to 12
29  M     A short textual representation of a month                                 Jan to Dec
30  n     Numeric representation of a month, without leading zeros                  1 to 12
31  t     Number of days in the given month                                         28 to 31
32  L     Whether it's a leap year                                                  1 if it is a leap year, 0 otherwise.
33  o     ISO-8601 year number (identical to (Y), but if the ISO week number (W)    Examples: 1998 or 2004
34        belongs to the previous or next year, that year is used instead)
35  Y     A full numeric representation of a year, 4 digits                         Examples: 1999 or 2003
36  y     A two digit representation of a year                                      Examples: 99 or 03
37  a     Lowercase Ante meridiem and Post meridiem                                 am or pm
38  A     Uppercase Ante meridiem and Post meridiem                                 AM or PM
39  g     12-hour format of an hour without leading zeros                           1 to 12
40  G     24-hour format of an hour without leading zeros                           0 to 23
41  h     12-hour format of an hour with leading zeros                              01 to 12
42  H     24-hour format of an hour with leading zeros                              00 to 23
43  i     Minutes, with leading zeros                                               00 to 59
44  s     Seconds, with leading zeros                                               00 to 59
45  u     Decimal fraction of a second                                              Examples:
46        (minimum 1 digit, arbitrary number of digits allowed)                     001 (i.e. 0.001s) or
47                                                                                  100 (i.e. 0.100s) or
48                                                                                  999 (i.e. 0.999s) or
49                                                                                  999876543210 (i.e. 0.999876543210s)
50  O     Difference to Greenwich time (GMT) in hours and minutes                   Example: +1030
51  P     Difference to Greenwich time (GMT) with colon between hours and minutes   Example: -08:00
52  T     Timezone abbreviation of the machine running the code                     Examples: EST, MDT, PDT ...
53  Z     Timezone offset in seconds (negative if west of UTC, positive if east)    -43200 to 50400
54  c     ISO 8601 date
55        Notes:                                                                    Examples:
56        1) If unspecified, the month / day defaults to the current month / day,   1991 or
57           the time defaults to midnight, while the timezone defaults to the      1992-10 or
58           browser's timezone. If a time is specified, it must include both hours 1993-09-20 or
59           and minutes. The "T" delimiter, seconds, milliseconds and timezone     1994-08-19T16:20+01:00 or
60           are optional.                                                          1995-07-18T17:21:28-02:00 or
61        2) The decimal fraction of a second, if specified, must contain at        1996-06-17T18:22:29.98765+03:00 or
62           least 1 digit (there is no limit to the maximum number                 1997-05-16T19:23:30,12345-0400 or
63           of digits allowed), and may be delimited by either a '.' or a ','      1998-04-15T20:24:31.2468Z or
64        Refer to the examples on the right for the various levels of              1999-03-14T20:24:32Z or
65        date-time granularity which are supported, or see                         2000-02-13T21:25:33
66        http://www.w3.org/TR/NOTE-datetime for more info.                         2001-01-12 22:26:34
67  U     Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)                1193432466 or -2138434463
68  M$    Microsoft AJAX serialized dates                                           \/Date(1238606590509)\/ (i.e. UTC milliseconds since epoch) or
69                                                                                  \/Date(1238606590509+0800)\/
70</pre>
71 *
72 * Example usage (note that you must escape format specifiers with '\\' to render them as character literals):
73 * <pre><code>
74// Sample date:
75// 'Wed Jan 10 2007 15:05:01 GMT-0600 (Central Standard Time)'
76
77var dt = new Date('1/10/2007 03:05:01 PM GMT-0600');
78document.write(dt.format('Y-m-d'));                           // 2007-01-10
79document.write(dt.format('F j, Y, g:i a'));                   // January 10, 2007, 3:05 pm
80document.write(dt.format('l, \\t\\he jS \\of F Y h:i:s A'));  // Wednesday, the 10th of January 2007 03:05:01 PM
81</code></pre>
82 *
83 * Here are some standard date/time patterns that you might find helpful.  They
84 * are not part of the source of Date.js, but to use them you can simply copy this
85 * block of code into any script that is included after Date.js and they will also become
86 * globally available on the Date object.  Feel free to add or remove patterns as needed in your code.
87 * <pre><code>
88Date.patterns = {
89    ISO8601Long:"Y-m-d H:i:s",
90    ISO8601Short:"Y-m-d",
91    ShortDate: "n/j/Y",
92    LongDate: "l, F d, Y",
93    FullDateTime: "l, F d, Y g:i:s A",
94    MonthDay: "F d",
95    ShortTime: "g:i A",
96    LongTime: "g:i:s A",
97    SortableDateTime: "Y-m-d\\TH:i:s",
98    UniversalSortableDateTime: "Y-m-d H:i:sO",
99    YearMonth: "F, Y"
100};
101</code></pre>
102 *
103 * Example usage:
104 * <pre><code>
105var dt = new Date();
106document.write(dt.format(Date.patterns.ShortDate));
107</code></pre>
108 * <p>Developer-written, custom formats may be used by supplying both a formatting and a parsing function
109 * which perform to specialized requirements. The functions are stored in {@link #parseFunctions} and {@link #formatFunctions}.</p>
110 */
111
112/*
113 * Most of the date-formatting functions below are the excellent work of Baron Schwartz.
114 * (see http://www.xaprb.com/blog/2005/12/12/javascript-closures-for-runtime-efficiency/)
115 * They generate precompiled functions from format patterns instead of parsing and
116 * processing each pattern every time a date is formatted. These functions are available
117 * on every Date object.
118 */
119
120(function() {
121
122/**
123 * Global flag which determines if strict date parsing should be used.
124 * Strict date parsing will not roll-over invalid dates, which is the
125 * default behaviour of javascript Date objects.
126 * (see {@link #parseDate} for more information)
127 * Defaults to <tt>false</tt>.
128 * @static
129 * @type Boolean
130*/
131Date.useStrict = false;
132
133
134// create private copy of Ext's String.format() method
135// - to remove unnecessary dependency
136// - to resolve namespace conflict with M$-Ajax's implementation
137function xf(format) {
138    var args = Array.prototype.slice.call(arguments, 1);
139    return format.replace(/\{(\d+)\}/g, function(m, i) {
140        return args[i];
141    });
142}
143
144
145// private
146Date.formatCodeToRegex = function(character, currentGroup) {
147    // Note: currentGroup - position in regex result array (see notes for Date.parseCodes below)
148    var p = Date.parseCodes[character];
149
150    if (p) {
151      p = typeof p == 'function'? p() : p;
152      Date.parseCodes[character] = p; // reassign function result to prevent repeated execution
153    }
154
155    return p ? Ext.applyIf({
156      c: p.c ? xf(p.c, currentGroup || "{0}") : p.c
157    }, p) : {
158        g:0,
159        c:null,
160        s:Ext.escapeRe(character) // treat unrecognised characters as literals
161    };
162};
163
164// private shorthand for Date.formatCodeToRegex since we'll be using it fairly often
165var $f = Date.formatCodeToRegex;
166
167Ext.apply(Date, {
168    /**
169     * <p>An object hash in which each property is a date parsing function. The property name is the
170     * format string which that function parses.</p>
171     * <p>This object is automatically populated with date parsing functions as
172     * date formats are requested for Ext standard formatting strings.</p>
173     * <p>Custom parsing functions may be inserted into this object, keyed by a name which from then on
174     * may be used as a format string to {@link #parseDate}.<p>
175     * <p>Example:</p><pre><code>
176Date.parseFunctions['x-date-format'] = myDateParser;
177</code></pre>
178     * <p>A parsing function should return a Date object, and is passed the following parameters:<div class="mdetail-params"><ul>
179     * <li><code>date</code> : String<div class="sub-desc">The date string to parse.</div></li>
180     * <li><code>strict</code> : Boolean<div class="sub-desc">True to validate date strings while parsing
181     * (i.e. prevent javascript Date "rollover") (The default must be false).
182     * Invalid date strings should return null when parsed.</div></li>
183     * </ul></div></p>
184     * <p>To enable Dates to also be <i>formatted</i> according to that format, a corresponding
185     * formatting function must be placed into the {@link #formatFunctions} property.
186     * @property parseFunctions
187     * @static
188     * @type Object
189     */
190    parseFunctions: {
191        "M$": function(input, strict) {
192            // note: the timezone offset is ignored since the M$ Ajax server sends
193            // a UTC milliseconds-since-Unix-epoch value (negative values are allowed)
194            var re = new RegExp('\\/Date\\(([-+])?(\\d+)(?:[+-]\\d{4})?\\)\\/');
195            var r = (input || '').match(re);
196            return r? new Date(((r[1] || '') + r[2]) * 1) : null;
197        }
198    },
199    parseRegexes: [],
200
201    /**
202     * <p>An object hash in which each property is a date formatting function. The property name is the
203     * format string which corresponds to the produced formatted date string.</p>
204     * <p>This object is automatically populated with date formatting functions as
205     * date formats are requested for Ext standard formatting strings.</p>
206     * <p>Custom formatting functions may be inserted into this object, keyed by a name which from then on
207     * may be used as a format string to {@link #format}. Example:</p><pre><code>
208Date.formatFunctions['x-date-format'] = myDateFormatter;
209</code></pre>
210     * <p>A formatting function should return a string representation of the passed Date object, and is passed the following parameters:<div class="mdetail-params"><ul>
211     * <li><code>date</code> : Date<div class="sub-desc">The Date to format.</div></li>
212     * </ul></div></p>
213     * <p>To enable date strings to also be <i>parsed</i> according to that format, a corresponding
214     * parsing function must be placed into the {@link #parseFunctions} property.
215     * @property formatFunctions
216     * @static
217     * @type Object
218     */
219    formatFunctions: {
220        "M$": function() {
221            // UTC milliseconds since Unix epoch (M$-AJAX serialized date format (MRSF))
222            return '\\/Date(' + this.getTime() + ')\\/';
223        }
224    },
225
226    y2kYear : 50,
227
228    /**
229     * Date interval constant
230     * @static
231     * @type String
232     */
233    MILLI : "ms",
234
235    /**
236     * Date interval constant
237     * @static
238     * @type String
239     */
240    SECOND : "s",
241
242    /**
243     * Date interval constant
244     * @static
245     * @type String
246     */
247    MINUTE : "mi",
248
249    /** Date interval constant
250     * @static
251     * @type String
252     */
253    HOUR : "h",
254
255    /**
256     * Date interval constant
257     * @static
258     * @type String
259     */
260    DAY : "d",
261
262    /**
263     * Date interval constant
264     * @static
265     * @type String
266     */
267    MONTH : "mo",
268
269    /**
270     * Date interval constant
271     * @static
272     * @type String
273     */
274    YEAR : "y",
275
276    /**
277     * <p>An object hash containing default date values used during date parsing.</p>
278     * <p>The following properties are available:<div class="mdetail-params"><ul>
279     * <li><code>y</code> : Number<div class="sub-desc">The default year value. (defaults to undefined)</div></li>
280     * <li><code>m</code> : Number<div class="sub-desc">The default 1-based month value. (defaults to undefined)</div></li>
281     * <li><code>d</code> : Number<div class="sub-desc">The default day value. (defaults to undefined)</div></li>
282     * <li><code>h</code> : Number<div class="sub-desc">The default hour value. (defaults to undefined)</div></li>
283     * <li><code>i</code> : Number<div class="sub-desc">The default minute value. (defaults to undefined)</div></li>
284     * <li><code>s</code> : Number<div class="sub-desc">The default second value. (defaults to undefined)</div></li>
285     * <li><code>ms</code> : Number<div class="sub-desc">The default millisecond value. (defaults to undefined)</div></li>
286     * </ul></div></p>
287     * <p>Override these properties to customize the default date values used by the {@link #parseDate} method.</p>
288     * <p><b>Note: In countries which experience Daylight Saving Time (i.e. DST), the <tt>h</tt>, <tt>i</tt>, <tt>s</tt>
289     * and <tt>ms</tt> properties may coincide with the exact time in which DST takes effect.
290     * It is the responsiblity of the developer to account for this.</b></p>
291     * Example Usage:
292     * <pre><code>
293// set default day value to the first day of the month
294Date.defaults.d = 1;
295
296// parse a February date string containing only year and month values.
297// setting the default day value to 1 prevents weird date rollover issues
298// when attempting to parse the following date string on, for example, March 31st 2009.
299Date.parseDate('2009-02', 'Y-m'); // returns a Date object representing February 1st 2009
300</code></pre>
301     * @property defaults
302     * @static
303     * @type Object
304     */
305    defaults: {},
306
307    /**
308     * An array of textual day names.
309     * Override these values for international dates.
310     * Example:
311     * <pre><code>
312Date.dayNames = [
313    'SundayInYourLang',
314    'MondayInYourLang',
315    ...
316];
317</code></pre>
318     * @type Array
319     * @static
320     */
321    dayNames : [
322        "Sunday",
323        "Monday",
324        "Tuesday",
325        "Wednesday",
326        "Thursday",
327        "Friday",
328        "Saturday"
329    ],
330
331    /**
332     * An array of textual month names.
333     * Override these values for international dates.
334     * Example:
335     * <pre><code>
336Date.monthNames = [
337    'JanInYourLang',
338    'FebInYourLang',
339    ...
340];
341</code></pre>
342     * @type Array
343     * @static
344     */
345    monthNames : [
346        "January",
347        "February",
348        "March",
349        "April",
350        "May",
351        "June",
352        "July",
353        "August",
354        "September",
355        "October",
356        "November",
357        "December"
358    ],
359
360    /**
361     * An object hash of zero-based javascript month numbers (with short month names as keys. note: keys are case-sensitive).
362     * Override these values for international dates.
363     * Example:
364     * <pre><code>
365Date.monthNumbers = {
366    'ShortJanNameInYourLang':0,
367    'ShortFebNameInYourLang':1,
368    ...
369};
370</code></pre>
371     * @type Object
372     * @static
373     */
374    monthNumbers : {
375        Jan:0,
376        Feb:1,
377        Mar:2,
378        Apr:3,
379        May:4,
380        Jun:5,
381        Jul:6,
382        Aug:7,
383        Sep:8,
384        Oct:9,
385        Nov:10,
386        Dec:11
387    },
388
389    /**
390     * Get the short month name for the given month number.
391     * Override this function for international dates.
392     * @param {Number} month A zero-based javascript month number.
393     * @return {String} The short month name.
394     * @static
395     */
396    getShortMonthName : function(month) {
397        return Date.monthNames[month].substring(0, 3);
398    },
399
400    /**
401     * Get the short day name for the given day number.
402     * Override this function for international dates.
403     * @param {Number} day A zero-based javascript day number.
404     * @return {String} The short day name.
405     * @static
406     */
407    getShortDayName : function(day) {
408        return Date.dayNames[day].substring(0, 3);
409    },
410
411    /**
412     * Get the zero-based javascript month number for the given short/full month name.
413     * Override this function for international dates.
414     * @param {String} name The short/full month name.
415     * @return {Number} The zero-based javascript month number.
416     * @static
417     */
418    getMonthNumber : function(name) {
419        // handle camel casing for english month names (since the keys for the Date.monthNumbers hash are case sensitive)
420        return Date.monthNumbers[name.substring(0, 1).toUpperCase() + name.substring(1, 3).toLowerCase()];
421    },
422   
423    /**
424     * Checks if the specified format contains hour information
425     * @param {Object} format The format to check
426     * @return {Boolean} True if the format contains hour information
427     * @static
428     */
429    formatContainsHourInfo : (function(){
430        var stripEscapeRe = /(\\.)/g,
431            hourInfoRe = /([gGhHisucUOPZ]|M\$)/;
432        return function(format){
433            return hourInfoRe.test(format.replace(stripEscapeRe, ''));
434        };
435    })(),
436
437    /**
438     * The base format-code to formatting-function hashmap used by the {@link #format} method.
439     * Formatting functions are strings (or functions which return strings) which
440     * will return the appropriate value when evaluated in the context of the Date object
441     * from which the {@link #format} method is called.
442     * Add to / override these mappings for custom date formatting.
443     * Note: Date.format() treats characters as literals if an appropriate mapping cannot be found.
444     * Example:
445     * <pre><code>
446Date.formatCodes.x = "String.leftPad(this.getDate(), 2, '0')";
447(new Date()).format("X"); // returns the current day of the month
448</code></pre>
449     * @type Object
450     * @static
451     */
452    formatCodes : {
453        d: "String.leftPad(this.getDate(), 2, '0')",
454        D: "Date.getShortDayName(this.getDay())", // get localised short day name
455        j: "this.getDate()",
456        l: "Date.dayNames[this.getDay()]",
457        N: "(this.getDay() ? this.getDay() : 7)",
458        S: "this.getSuffix()",
459        w: "this.getDay()",
460        z: "this.getDayOfYear()",
461        W: "String.leftPad(this.getWeekOfYear(), 2, '0')",
462        F: "Date.monthNames[this.getMonth()]",
463        m: "String.leftPad(this.getMonth() + 1, 2, '0')",
464        M: "Date.getShortMonthName(this.getMonth())", // get localised short month name
465        n: "(this.getMonth() + 1)",
466        t: "this.getDaysInMonth()",
467        L: "(this.isLeapYear() ? 1 : 0)",
468        o: "(this.getFullYear() + (this.getWeekOfYear() == 1 && this.getMonth() > 0 ? +1 : (this.getWeekOfYear() >= 52 && this.getMonth() < 11 ? -1 : 0)))",
469        Y: "String.leftPad(this.getFullYear(), 4, '0')",
470        y: "('' + this.getFullYear()).substring(2, 4)",
471        a: "(this.getHours() < 12 ? 'am' : 'pm')",
472        A: "(this.getHours() < 12 ? 'AM' : 'PM')",
473        g: "((this.getHours() % 12) ? this.getHours() % 12 : 12)",
474        G: "this.getHours()",
475        h: "String.leftPad((this.getHours() % 12) ? this.getHours() % 12 : 12, 2, '0')",
476        H: "String.leftPad(this.getHours(), 2, '0')",
477        i: "String.leftPad(this.getMinutes(), 2, '0')",
478        s: "String.leftPad(this.getSeconds(), 2, '0')",
479        u: "String.leftPad(this.getMilliseconds(), 3, '0')",
480        O: "this.getGMTOffset()",
481        P: "this.getGMTOffset(true)",
482        T: "this.getTimezone()",
483        Z: "(this.getTimezoneOffset() * -60)",
484
485        c: function() { // ISO-8601 -- GMT format
486            for (var c = "Y-m-dTH:i:sP", code = [], i = 0, l = c.length; i < l; ++i) {
487                var e = c.charAt(i);
488                code.push(e == "T" ? "'T'" : Date.getFormatCode(e)); // treat T as a character literal
489            }
490            return code.join(" + ");
491        },
492        /*
493        c: function() { // ISO-8601 -- UTC format
494            return [
495              "this.getUTCFullYear()", "'-'",
496              "String.leftPad(this.getUTCMonth() + 1, 2, '0')", "'-'",
497              "String.leftPad(this.getUTCDate(), 2, '0')",
498              "'T'",
499              "String.leftPad(this.getUTCHours(), 2, '0')", "':'",
500              "String.leftPad(this.getUTCMinutes(), 2, '0')", "':'",
501              "String.leftPad(this.getUTCSeconds(), 2, '0')",
502              "'Z'"
503            ].join(" + ");
504        },
505        */
506
507        U: "Math.round(this.getTime() / 1000)"
508    },
509
510    /**
511     * Checks if the passed Date parameters will cause a javascript Date "rollover".
512     * @param {Number} year 4-digit year
513     * @param {Number} month 1-based month-of-year
514     * @param {Number} day Day of month
515     * @param {Number} hour (optional) Hour
516     * @param {Number} minute (optional) Minute
517     * @param {Number} second (optional) Second
518     * @param {Number} millisecond (optional) Millisecond
519     * @return {Boolean} true if the passed parameters do not cause a Date "rollover", false otherwise.
520     * @static
521     */
522    isValid : function(y, m, d, h, i, s, ms) {
523        // setup defaults
524        h = h || 0;
525        i = i || 0;
526        s = s || 0;
527        ms = ms || 0;
528
529        // Special handling for year < 100
530        var dt = new Date(y < 100 ? 100 : y, m - 1, d, h, i, s, ms).add(Date.YEAR, y < 100 ? y - 100 : 0);
531
532        return y == dt.getFullYear() &&
533            m == dt.getMonth() + 1 &&
534            d == dt.getDate() &&
535            h == dt.getHours() &&
536            i == dt.getMinutes() &&
537            s == dt.getSeconds() &&
538            ms == dt.getMilliseconds();
539    },
540
541    /**
542     * Parses the passed string using the specified date format.
543     * Note that this function expects normal calendar dates, meaning that months are 1-based (i.e. 1 = January).
544     * The {@link #defaults} hash will be used for any date value (i.e. year, month, day, hour, minute, second or millisecond)
545     * which cannot be found in the passed string. If a corresponding default date value has not been specified in the {@link #defaults} hash,
546     * the current date's year, month, day or DST-adjusted zero-hour time value will be used instead.
547     * Keep in mind that the input date string must precisely match the specified format string
548     * in order for the parse operation to be successful (failed parse operations return a null value).
549     * <p>Example:</p><pre><code>
550//dt = Fri May 25 2007 (current date)
551var dt = new Date();
552
553//dt = Thu May 25 2006 (today&#39;s month/day in 2006)
554dt = Date.parseDate("2006", "Y");
555
556//dt = Sun Jan 15 2006 (all date parts specified)
557dt = Date.parseDate("2006-01-15", "Y-m-d");
558
559//dt = Sun Jan 15 2006 15:20:01
560dt = Date.parseDate("2006-01-15 3:20:01 PM", "Y-m-d g:i:s A");
561
562// attempt to parse Sun Feb 29 2006 03:20:01 in strict mode
563dt = Date.parseDate("2006-02-29 03:20:01", "Y-m-d H:i:s", true); // returns null
564</code></pre>
565     * @param {String} input The raw date string.
566     * @param {String} format The expected date string format.
567     * @param {Boolean} strict (optional) True to validate date strings while parsing (i.e. prevents javascript Date "rollover")
568                        (defaults to false). Invalid date strings will return null when parsed.
569     * @return {Date} The parsed Date.
570     * @static
571     */
572    parseDate : function(input, format, strict) {
573        var p = Date.parseFunctions;
574        if (p[format] == null) {
575            Date.createParser(format);
576        }
577        return p[format](input, Ext.isDefined(strict) ? strict : Date.useStrict);
578    },
579
580    // private
581    getFormatCode : function(character) {
582        var f = Date.formatCodes[character];
583
584        if (f) {
585          f = typeof f == 'function'? f() : f;
586          Date.formatCodes[character] = f; // reassign function result to prevent repeated execution
587        }
588
589        // note: unknown characters are treated as literals
590        return f || ("'" + String.escape(character) + "'");
591    },
592
593    // private
594    createFormat : function(format) {
595        var code = [],
596            special = false,
597            ch = '';
598
599        for (var i = 0; i < format.length; ++i) {
600            ch = format.charAt(i);
601            if (!special && ch == "\\") {
602                special = true;
603            } else if (special) {
604                special = false;
605                code.push("'" + String.escape(ch) + "'");
606            } else {
607                code.push(Date.getFormatCode(ch));
608            }
609        }
610        Date.formatFunctions[format] = new Function("return " + code.join('+'));
611    },
612
613    // private
614    createParser : function() {
615        var code = [
616            "var dt, y, m, d, h, i, s, ms, o, z, zz, u, v,",
617                "def = Date.defaults,",
618                "results = String(input).match(Date.parseRegexes[{0}]);", // either null, or an array of matched strings
619
620            "if(results){",
621                "{1}",
622
623                "if(u != null){", // i.e. unix time is defined
624                    "v = new Date(u * 1000);", // give top priority to UNIX time
625                "}else{",
626                    // create Date object representing midnight of the current day;
627                    // this will provide us with our date defaults
628                    // (note: clearTime() handles Daylight Saving Time automatically)
629                    "dt = (new Date()).clearTime();",
630
631                    // date calculations (note: these calculations create a dependency on Ext.num())
632                    "y = Ext.num(y, Ext.num(def.y, dt.getFullYear()));",
633                    "m = Ext.num(m, Ext.num(def.m - 1, dt.getMonth()));",
634                    "d = Ext.num(d, Ext.num(def.d, dt.getDate()));",
635
636                    // time calculations (note: these calculations create a dependency on Ext.num())
637                    "h  = Ext.num(h, Ext.num(def.h, dt.getHours()));",
638                    "i  = Ext.num(i, Ext.num(def.i, dt.getMinutes()));",
639                    "s  = Ext.num(s, Ext.num(def.s, dt.getSeconds()));",
640                    "ms = Ext.num(ms, Ext.num(def.ms, dt.getMilliseconds()));",
641
642                    "if(z >= 0 && y >= 0){",
643                        // both the year and zero-based day of year are defined and >= 0.
644                        // these 2 values alone provide sufficient info to create a full date object
645
646                        // create Date object representing January 1st for the given year
647                        // handle years < 100 appropriately
648                        "v = new Date(y < 100 ? 100 : y, 0, 1, h, i, s, ms).add(Date.YEAR, y < 100 ? y - 100 : 0);",
649
650                        // then add day of year, checking for Date "rollover" if necessary
651                        "v = !strict? v : (strict === true && (z <= 364 || (v.isLeapYear() && z <= 365))? v.add(Date.DAY, z) : null);",
652                    "}else if(strict === true && !Date.isValid(y, m + 1, d, h, i, s, ms)){", // check for Date "rollover"
653                        "v = null;", // invalid date, so return null
654                    "}else{",
655                        // plain old Date object
656                        // handle years < 100 properly
657                        "v = new Date(y < 100 ? 100 : y, m, d, h, i, s, ms).add(Date.YEAR, y < 100 ? y - 100 : 0);",
658                    "}",
659                "}",
660            "}",
661
662            "if(v){",
663                // favour UTC offset over GMT offset
664                "if(zz != null){",
665                    // reset to UTC, then add offset
666                    "v = v.add(Date.SECOND, -v.getTimezoneOffset() * 60 - zz);",
667                "}else if(o){",
668                    // reset to GMT, then add offset
669                    "v = v.add(Date.MINUTE, -v.getTimezoneOffset() + (sn == '+'? -1 : 1) * (hr * 60 + mn));",
670                "}",
671            "}",
672
673            "return v;"
674        ].join('\n');
675
676        return function(format) {
677            var regexNum = Date.parseRegexes.length,
678                currentGroup = 1,
679                calc = [],
680                regex = [],
681                special = false,
682                ch = "",
683                i = 0,
684                obj,
685                last;
686
687            for (; i < format.length; ++i) {
688                ch = format.charAt(i);
689                if (!special && ch == "\\") {
690                    special = true;
691                } else if (special) {
692                    special = false;
693                    regex.push(String.escape(ch));
694                } else {
695                    obj = $f(ch, currentGroup);
696                    currentGroup += obj.g;
697                    regex.push(obj.s);
698                    if (obj.g && obj.c) {
699                        if (obj.calcLast) {
700                            last = obj.c;
701                        } else {
702                            calc.push(obj.c);
703                        }
704                    }
705                }
706            }
707           
708            if (last) {
709                calc.push(last);
710            }
711
712            Date.parseRegexes[regexNum] = new RegExp("^" + regex.join('') + "$", 'i');
713            Date.parseFunctions[format] = new Function("input", "strict", xf(code, regexNum, calc.join('')));
714        };
715    }(),
716
717    // private
718    parseCodes : {
719        /*
720         * Notes:
721         * g = {Number} calculation group (0 or 1. only group 1 contributes to date calculations.)
722         * c = {String} calculation method (required for group 1. null for group 0. {0} = currentGroup - position in regex result array)
723         * s = {String} regex pattern. all matches are stored in results[], and are accessible by the calculation mapped to 'c'
724         */
725        d: {
726            g:1,
727            c:"d = parseInt(results[{0}], 10);\n",
728            s:"(\\d{2})" // day of month with leading zeroes (01 - 31)
729        },
730        j: {
731            g:1,
732            c:"d = parseInt(results[{0}], 10);\n",
733            s:"(\\d{1,2})" // day of month without leading zeroes (1 - 31)
734        },
735        D: function() {
736            for (var a = [], i = 0; i < 7; a.push(Date.getShortDayName(i)), ++i); // get localised short day names
737            return {
738                g:0,
739                c:null,
740                s:"(?:" + a.join("|") +")"
741            };
742        },
743        l: function() {
744            return {
745                g:0,
746                c:null,
747                s:"(?:" + Date.dayNames.join("|") + ")"
748            };
749        },
750        N: {
751            g:0,
752            c:null,
753            s:"[1-7]" // ISO-8601 day number (1 (monday) - 7 (sunday))
754        },
755        S: {
756            g:0,
757            c:null,
758            s:"(?:st|nd|rd|th)"
759        },
760        w: {
761            g:0,
762            c:null,
763            s:"[0-6]" // javascript day number (0 (sunday) - 6 (saturday))
764        },
765        z: {
766            g:1,
767            c:"z = parseInt(results[{0}], 10);\n",
768            s:"(\\d{1,3})" // day of the year (0 - 364 (365 in leap years))
769        },
770        W: {
771            g:0,
772            c:null,
773            s:"(?:\\d{2})" // ISO-8601 week number (with leading zero)
774        },
775        F: function() {
776            return {
777                g:1,
778                c:"m = parseInt(Date.getMonthNumber(results[{0}]), 10);\n", // get localised month number
779                s:"(" + Date.monthNames.join("|") + ")"
780            };
781        },
782        M: function() {
783            for (var a = [], i = 0; i < 12; a.push(Date.getShortMonthName(i)), ++i); // get localised short month names
784            return Ext.applyIf({
785                s:"(" + a.join("|") + ")"
786            }, $f("F"));
787        },
788        m: {
789            g:1,
790            c:"m = parseInt(results[{0}], 10) - 1;\n",
791            s:"(\\d{2})" // month number with leading zeros (01 - 12)
792        },
793        n: {
794            g:1,
795            c:"m = parseInt(results[{0}], 10) - 1;\n",
796            s:"(\\d{1,2})" // month number without leading zeros (1 - 12)
797        },
798        t: {
799            g:0,
800            c:null,
801            s:"(?:\\d{2})" // no. of days in the month (28 - 31)
802        },
803        L: {
804            g:0,
805            c:null,
806            s:"(?:1|0)"
807        },
808        o: function() {
809            return $f("Y");
810        },
811        Y: {
812            g:1,
813            c:"y = parseInt(results[{0}], 10);\n",
814            s:"(\\d{4})" // 4-digit year
815        },
816        y: {
817            g:1,
818            c:"var ty = parseInt(results[{0}], 10);\n"
819                + "y = ty > Date.y2kYear ? 1900 + ty : 2000 + ty;\n", // 2-digit year
820            s:"(\\d{1,2})"
821        },
822        /**
823         * In the am/pm parsing routines, we allow both upper and lower case
824         * even though it doesn't exactly match the spec. It gives much more flexibility
825         * in being able to specify case insensitive regexes.
826         */
827        a: function(){
828            return $f("A");
829        },
830        A: {
831            // We need to calculate the hour before we apply AM/PM when parsing
832            calcLast: true,
833            g:1,
834            c:"if (/(am)/i.test(results[{0}])) {\n"
835                + "if (!h || h == 12) { h = 0; }\n"
836                + "} else { if (!h || h < 12) { h = (h || 0) + 12; }}",
837            s:"(AM|PM|am|pm)"
838        },
839        g: function() {
840            return $f("G");
841        },
842        G: {
843            g:1,
844            c:"h = parseInt(results[{0}], 10);\n",
845            s:"(\\d{1,2})" // 24-hr format of an hour without leading zeroes (0 - 23)
846        },
847        h: function() {
848            return $f("H");
849        },
850        H: {
851            g:1,
852            c:"h = parseInt(results[{0}], 10);\n",
853            s:"(\\d{2})" //  24-hr format of an hour with leading zeroes (00 - 23)
854        },
855        i: {
856            g:1,
857            c:"i = parseInt(results[{0}], 10);\n",
858            s:"(\\d{2})" // minutes with leading zeros (00 - 59)
859        },
860        s: {
861            g:1,
862            c:"s = parseInt(results[{0}], 10);\n",
863            s:"(\\d{2})" // seconds with leading zeros (00 - 59)
864        },
865        u: {
866            g:1,
867            c:"ms = results[{0}]; ms = parseInt(ms, 10)/Math.pow(10, ms.length - 3);\n",
868            s:"(\\d+)" // decimal fraction of a second (minimum = 1 digit, maximum = unlimited)
869        },
870        O: {
871            g:1,
872            c:[
873                "o = results[{0}];",
874                "var sn = o.substring(0,1),", // get + / - sign
875                    "hr = o.substring(1,3)*1 + Math.floor(o.substring(3,5) / 60),", // get hours (performs minutes-to-hour conversion also, just in case)
876                    "mn = o.substring(3,5) % 60;", // get minutes
877                "o = ((-12 <= (hr*60 + mn)/60) && ((hr*60 + mn)/60 <= 14))? (sn + String.leftPad(hr, 2, '0') + String.leftPad(mn, 2, '0')) : null;\n" // -12hrs <= GMT offset <= 14hrs
878            ].join("\n"),
879            s: "([+\-]\\d{4})" // GMT offset in hrs and mins
880        },
881        P: {
882            g:1,
883            c:[
884                "o = results[{0}];",
885                "var sn = o.substring(0,1),", // get + / - sign
886                    "hr = o.substring(1,3)*1 + Math.floor(o.substring(4,6) / 60),", // get hours (performs minutes-to-hour conversion also, just in case)
887                    "mn = o.substring(4,6) % 60;", // get minutes
888                "o = ((-12 <= (hr*60 + mn)/60) && ((hr*60 + mn)/60 <= 14))? (sn + String.leftPad(hr, 2, '0') + String.leftPad(mn, 2, '0')) : null;\n" // -12hrs <= GMT offset <= 14hrs
889            ].join("\n"),
890            s: "([+\-]\\d{2}:\\d{2})" // GMT offset in hrs and mins (with colon separator)
891        },
892        T: {
893            g:0,
894            c:null,
895            s:"[A-Z]{1,4}" // timezone abbrev. may be between 1 - 4 chars
896        },
897        Z: {
898            g:1,
899            c:"zz = results[{0}] * 1;\n" // -43200 <= UTC offset <= 50400
900                  + "zz = (-43200 <= zz && zz <= 50400)? zz : null;\n",
901            s:"([+\-]?\\d{1,5})" // leading '+' sign is optional for UTC offset
902        },
903        c: function() {
904            var calc = [],
905                arr = [
906                    $f("Y", 1), // year
907                    $f("m", 2), // month
908                    $f("d", 3), // day
909                    $f("h", 4), // hour
910                    $f("i", 5), // minute
911                    $f("s", 6), // second
912                    {c:"ms = results[7] || '0'; ms = parseInt(ms, 10)/Math.pow(10, ms.length - 3);\n"}, // decimal fraction of a second (minimum = 1 digit, maximum = unlimited)
913                    {c:[ // allow either "Z" (i.e. UTC) or "-0530" or "+08:00" (i.e. UTC offset) timezone delimiters. assumes local timezone if no timezone is specified
914                        "if(results[8]) {", // timezone specified
915                            "if(results[8] == 'Z'){",
916                                "zz = 0;", // UTC
917                            "}else if (results[8].indexOf(':') > -1){",
918                                $f("P", 8).c, // timezone offset with colon separator
919                            "}else{",
920                                $f("O", 8).c, // timezone offset without colon separator
921                            "}",
922                        "}"
923                    ].join('\n')}
924                ];
925
926            for (var i = 0, l = arr.length; i < l; ++i) {
927                calc.push(arr[i].c);
928            }
929
930            return {
931                g:1,
932                c:calc.join(""),
933                s:[
934                    arr[0].s, // year (required)
935                    "(?:", "-", arr[1].s, // month (optional)
936                        "(?:", "-", arr[2].s, // day (optional)
937                            "(?:",
938                                "(?:T| )?", // time delimiter -- either a "T" or a single blank space
939                                arr[3].s, ":", arr[4].s,  // hour AND minute, delimited by a single colon (optional). MUST be preceded by either a "T" or a single blank space
940                                "(?::", arr[5].s, ")?", // seconds (optional)
941                                "(?:(?:\\.|,)(\\d+))?", // decimal fraction of a second (e.g. ",12345" or ".98765") (optional)
942                                "(Z|(?:[-+]\\d{2}(?::)?\\d{2}))?", // "Z" (UTC) or "-0530" (UTC offset without colon delimiter) or "+08:00" (UTC offset with colon delimiter) (optional)
943                            ")?",
944                        ")?",
945                    ")?"
946                ].join("")
947            };
948        },
949        U: {
950            g:1,
951            c:"u = parseInt(results[{0}], 10);\n",
952            s:"(-?\\d+)" // leading minus sign indicates seconds before UNIX epoch
953        }
954    }
955});
956
957}());
958
959Ext.apply(Date.prototype, {
960    // private
961    dateFormat : function(format) {
962        if (Date.formatFunctions[format] == null) {
963            Date.createFormat(format);
964        }
965        return Date.formatFunctions[format].call(this);
966    },
967
968    /**
969     * Get the timezone abbreviation of the current date (equivalent to the format specifier 'T').
970     *
971     * Note: The date string returned by the javascript Date object's toString() method varies
972     * between browsers (e.g. FF vs IE) and system region settings (e.g. IE in Asia vs IE in America).
973     * For a given date string e.g. "Thu Oct 25 2007 22:55:35 GMT+0800 (Malay Peninsula Standard Time)",
974     * getTimezone() first tries to get the timezone abbreviation from between a pair of parentheses
975     * (which may or may not be present), failing which it proceeds to get the timezone abbreviation
976     * from the GMT offset portion of the date string.
977     * @return {String} The abbreviated timezone name (e.g. 'CST', 'PDT', 'EDT', 'MPST' ...).
978     */
979    getTimezone : function() {
980        // the following list shows the differences between date strings from different browsers on a WinXP SP2 machine from an Asian locale:
981        //
982        // Opera  : "Thu, 25 Oct 2007 22:53:45 GMT+0800" -- shortest (weirdest) date string of the lot
983        // 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)
984        // FF     : "Thu Oct 25 2007 22:55:35 GMT+0800 (Malay Peninsula Standard Time)" -- value in parentheses always gives the correct timezone
985        // IE     : "Thu Oct 25 22:54:35 UTC+0800 2007" -- (Asian system setting) look for 3-4 letter timezone abbrev
986        // IE     : "Thu Oct 25 17:06:37 PDT 2007" -- (American system setting) look for 3-4 letter timezone abbrev
987        //
988        // this crazy regex attempts to guess the correct timezone abbreviation despite these differences.
989        // step 1: (?:\((.*)\) -- find timezone in parentheses
990        // 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
991        // step 3: remove all non uppercase characters found in step 1 and 2
992        return this.toString().replace(/^.* (?:\((.*)\)|([A-Z]{1,4})(?:[\-+][0-9]{4})?(?: -?\d+)?)$/, "$1$2").replace(/[^A-Z]/g, "");
993    },
994
995    /**
996     * Get the offset from GMT of the current date (equivalent to the format specifier 'O').
997     * @param {Boolean} colon (optional) true to separate the hours and minutes with a colon (defaults to false).
998     * @return {String} The 4-character offset string prefixed with + or - (e.g. '-0600').
999     */
1000    getGMTOffset : function(colon) {
1001        return (this.getTimezoneOffset() > 0 ? "-" : "+")
1002            + String.leftPad(Math.floor(Math.abs(this.getTimezoneOffset()) / 60), 2, "0")
1003            + (colon ? ":" : "")
1004            + String.leftPad(Math.abs(this.getTimezoneOffset() % 60), 2, "0");
1005    },
1006
1007    /**
1008     * Get the numeric day number of the year, adjusted for leap year.
1009     * @return {Number} 0 to 364 (365 in leap years).
1010     */
1011    getDayOfYear: function() {
1012        var num = 0,
1013            d = this.clone(),
1014            m = this.getMonth(),
1015            i;
1016
1017        for (i = 0, d.setDate(1), d.setMonth(0); i < m; d.setMonth(++i)) {
1018            num += d.getDaysInMonth();
1019        }
1020        return num + this.getDate() - 1;
1021    },
1022
1023    /**
1024     * Get the numeric ISO-8601 week number of the year.
1025     * (equivalent to the format specifier 'W', but without a leading zero).
1026     * @return {Number} 1 to 53
1027     */
1028    getWeekOfYear : function() {
1029        // adapted from http://www.merlyn.demon.co.uk/weekcalc.htm
1030        var ms1d = 864e5, // milliseconds in a day
1031            ms7d = 7 * ms1d; // milliseconds in a week
1032
1033        return function() { // return a closure so constants get calculated only once
1034            var DC3 = Date.UTC(this.getFullYear(), this.getMonth(), this.getDate() + 3) / ms1d, // an Absolute Day Number
1035                AWN = Math.floor(DC3 / 7), // an Absolute Week Number
1036                Wyr = new Date(AWN * ms7d).getUTCFullYear();
1037
1038            return AWN - Math.floor(Date.UTC(Wyr, 0, 7) / ms7d) + 1;
1039        };
1040    }(),
1041
1042    /**
1043     * Checks if the current date falls within a leap year.
1044     * @return {Boolean} True if the current date falls within a leap year, false otherwise.
1045     */
1046    isLeapYear : function() {
1047        var year = this.getFullYear();
1048        return !!((year & 3) == 0 && (year % 100 || (year % 400 == 0 && year)));
1049    },
1050
1051    /**
1052     * Get the first day of the current month, adjusted for leap year.  The returned value
1053     * is the numeric day index within the week (0-6) which can be used in conjunction with
1054     * the {@link #monthNames} array to retrieve the textual day name.
1055     * Example:
1056     * <pre><code>
1057var dt = new Date('1/10/2007');
1058document.write(Date.dayNames[dt.getFirstDayOfMonth()]); //output: 'Monday'
1059</code></pre>
1060     * @return {Number} The day number (0-6).
1061     */
1062    getFirstDayOfMonth : function() {
1063        var day = (this.getDay() - (this.getDate() - 1)) % 7;
1064        return (day < 0) ? (day + 7) : day;
1065    },
1066
1067    /**
1068     * Get the last day of the current month, adjusted for leap year.  The returned value
1069     * is the numeric day index within the week (0-6) which can be used in conjunction with
1070     * the {@link #monthNames} array to retrieve the textual day name.
1071     * Example:
1072     * <pre><code>
1073var dt = new Date('1/10/2007');
1074document.write(Date.dayNames[dt.getLastDayOfMonth()]); //output: 'Wednesday'
1075</code></pre>
1076     * @return {Number} The day number (0-6).
1077     */
1078    getLastDayOfMonth : function() {
1079        return this.getLastDateOfMonth().getDay();
1080    },
1081
1082
1083    /**
1084     * Get the date of the first day of the month in which this date resides.
1085     * @return {Date}
1086     */
1087    getFirstDateOfMonth : function() {
1088        return new Date(this.getFullYear(), this.getMonth(), 1);
1089    },
1090
1091    /**
1092     * Get the date of the last day of the month in which this date resides.
1093     * @return {Date}
1094     */
1095    getLastDateOfMonth : function() {
1096        return new Date(this.getFullYear(), this.getMonth(), this.getDaysInMonth());
1097    },
1098
1099    /**
1100     * Get the number of days in the current month, adjusted for leap year.
1101     * @return {Number} The number of days in the month.
1102     */
1103    getDaysInMonth: function() {
1104        var daysInMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
1105
1106        return function() { // return a closure for efficiency
1107            var m = this.getMonth();
1108
1109            return m == 1 && this.isLeapYear() ? 29 : daysInMonth[m];
1110        };
1111    }(),
1112
1113    /**
1114     * Get the English ordinal suffix of the current day (equivalent to the format specifier 'S').
1115     * @return {String} 'st, 'nd', 'rd' or 'th'.
1116     */
1117    getSuffix : function() {
1118        switch (this.getDate()) {
1119            case 1:
1120            case 21:
1121            case 31:
1122                return "st";
1123            case 2:
1124            case 22:
1125                return "nd";
1126            case 3:
1127            case 23:
1128                return "rd";
1129            default:
1130                return "th";
1131        }
1132    },
1133
1134    /**
1135     * Creates and returns a new Date instance with the exact same date value as the called instance.
1136     * Dates are copied and passed by reference, so if a copied date variable is modified later, the original
1137     * variable will also be changed.  When the intention is to create a new variable that will not
1138     * modify the original instance, you should create a clone.
1139     *
1140     * Example of correctly cloning a date:
1141     * <pre><code>
1142//wrong way:
1143var orig = new Date('10/1/2006');
1144var copy = orig;
1145copy.setDate(5);
1146document.write(orig);  //returns 'Thu Oct 05 2006'!
1147
1148//correct way:
1149var orig = new Date('10/1/2006');
1150var copy = orig.clone();
1151copy.setDate(5);
1152document.write(orig);  //returns 'Thu Oct 01 2006'
1153</code></pre>
1154     * @return {Date} The new Date instance.
1155     */
1156    clone : function() {
1157        return new Date(this.getTime());
1158    },
1159
1160    /**
1161     * Checks if the current date is affected by Daylight Saving Time (DST).
1162     * @return {Boolean} True if the current date is affected by DST.
1163     */
1164    isDST : function() {
1165        // adapted from http://extjs.com/forum/showthread.php?p=247172#post247172
1166        // courtesy of @geoffrey.mcgill
1167        return new Date(this.getFullYear(), 0, 1).getTimezoneOffset() != this.getTimezoneOffset();
1168    },
1169
1170    /**
1171     * Attempts to clear all time information from this Date by setting the time to midnight of the same day,
1172     * automatically adjusting for Daylight Saving Time (DST) where applicable.
1173     * (note: DST timezone information for the browser's host operating system is assumed to be up-to-date)
1174     * @param {Boolean} clone true to create a clone of this date, clear the time and return it (defaults to false).
1175     * @return {Date} this or the clone.
1176     */
1177    clearTime : function(clone) {
1178        if (clone) {
1179            return this.clone().clearTime();
1180        }
1181
1182        // get current date before clearing time
1183        var d = this.getDate();
1184
1185        // clear time
1186        this.setHours(0);
1187        this.setMinutes(0);
1188        this.setSeconds(0);
1189        this.setMilliseconds(0);
1190
1191        if (this.getDate() != d) { // account for DST (i.e. day of month changed when setting hour = 0)
1192            // note: DST adjustments are assumed to occur in multiples of 1 hour (this is almost always the case)
1193            // refer to http://www.timeanddate.com/time/aboutdst.html for the (rare) exceptions to this rule
1194
1195            // increment hour until cloned date == current date
1196            for (var hr = 1, c = this.add(Date.HOUR, hr); c.getDate() != d; hr++, c = this.add(Date.HOUR, hr));
1197
1198            this.setDate(d);
1199            this.setHours(c.getHours());
1200        }
1201
1202        return this;
1203    },
1204
1205    /**
1206     * Provides a convenient method for performing basic date arithmetic. This method
1207     * does not modify the Date instance being called - it creates and returns
1208     * a new Date instance containing the resulting date value.
1209     *
1210     * Examples:
1211     * <pre><code>
1212// Basic usage:
1213var dt = new Date('10/29/2006').add(Date.DAY, 5);
1214document.write(dt); //returns 'Fri Nov 03 2006 00:00:00'
1215
1216// Negative values will be subtracted:
1217var dt2 = new Date('10/1/2006').add(Date.DAY, -5);
1218document.write(dt2); //returns 'Tue Sep 26 2006 00:00:00'
1219
1220// You can even chain several calls together in one line:
1221var dt3 = new Date('10/1/2006').add(Date.DAY, 5).add(Date.HOUR, 8).add(Date.MINUTE, -30);
1222document.write(dt3); //returns 'Fri Oct 06 2006 07:30:00'
1223</code></pre>
1224     *
1225     * @param {String} interval A valid date interval enum value.
1226     * @param {Number} value The amount to add to the current date.
1227     * @return {Date} The new Date instance.
1228     */
1229    add : function(interval, value) {
1230        var d = this.clone();
1231        if (!interval || value === 0) return d;
1232
1233        switch(interval.toLowerCase()) {
1234            case Date.MILLI:
1235                d.setMilliseconds(this.getMilliseconds() + value);
1236                break;
1237            case Date.SECOND:
1238                d.setSeconds(this.getSeconds() + value);
1239                break;
1240            case Date.MINUTE:
1241                d.setMinutes(this.getMinutes() + value);
1242                break;
1243            case Date.HOUR:
1244                d.setHours(this.getHours() + value);
1245                break;
1246            case Date.DAY:
1247                d.setDate(this.getDate() + value);
1248                break;
1249            case Date.MONTH:
1250                var day = this.getDate();
1251                if (day > 28) {
1252                    day = Math.min(day, this.getFirstDateOfMonth().add('mo', value).getLastDateOfMonth().getDate());
1253                }
1254                d.setDate(day);
1255                d.setMonth(this.getMonth() + value);
1256                break;
1257            case Date.YEAR:
1258                d.setFullYear(this.getFullYear() + value);
1259                break;
1260        }
1261        return d;
1262    },
1263
1264    /**
1265     * Checks if this date falls on or between the given start and end dates.
1266     * @param {Date} start Start date
1267     * @param {Date} end End date
1268     * @return {Boolean} true if this date falls on or between the given start and end dates.
1269     */
1270    between : function(start, end) {
1271        var t = this.getTime();
1272        return start.getTime() <= t && t <= end.getTime();
1273    }
1274});
1275
1276
1277/**
1278 * Formats a date given the supplied format string.
1279 * @param {String} format The format string.
1280 * @return {String} The formatted date.
1281 * @method format
1282 */
1283Date.prototype.format = Date.prototype.dateFormat;
1284
1285
1286// private
1287if (Ext.isSafari && (navigator.userAgent.match(/WebKit\/(\d+)/)[1] || NaN) < 420) {
1288    Ext.apply(Date.prototype, {
1289        _xMonth : Date.prototype.setMonth,
1290        _xDate  : Date.prototype.setDate,
1291
1292        // Bug in Safari 1.3, 2.0 (WebKit build < 420)
1293        // Date.setMonth does not work consistently if iMonth is not 0-11
1294        setMonth : function(num) {
1295            if (num <= -1) {
1296                var n = Math.ceil(-num),
1297                    back_year = Math.ceil(n / 12),
1298                    month = (n % 12) ? 12 - n % 12 : 0;
1299
1300                this.setFullYear(this.getFullYear() - back_year);
1301
1302                return this._xMonth(month);
1303            } else {
1304                return this._xMonth(num);
1305            }
1306        },
1307
1308        // Bug in setDate() method (resolved in WebKit build 419.3, so to be safe we target Webkit builds < 420)
1309        // The parameter for Date.setDate() is converted to a signed byte integer in Safari
1310        // http://brianary.blogspot.com/2006/03/safari-date-bug.html
1311        setDate : function(d) {
1312            // use setTime() to workaround setDate() bug
1313            // subtract current day of month in milliseconds, then add desired day of month in milliseconds
1314            return this.setTime(this.getTime() - (this.getDate() - d) * 864e5);
1315        }
1316    });
1317}
1318
1319
1320
1321/* Some basic Date tests... (requires Firebug)
1322
1323Date.parseDate('', 'c'); // call Date.parseDate() once to force computation of regex string so we can console.log() it
1324console.log('Insane Regex for "c" format: %o', Date.parseCodes.c.s); // view the insane regex for the "c" format specifier
1325
1326// standard tests
1327console.group('Standard Date.parseDate() Tests');
1328    console.log('Date.parseDate("2009-01-05T11:38:56", "c")               = %o', Date.parseDate("2009-01-05T11:38:56", "c")); // assumes browser's timezone setting
1329    console.log('Date.parseDate("2009-02-04T12:37:55.001000", "c")        = %o', Date.parseDate("2009-02-04T12:37:55.001000", "c")); // assumes browser's timezone setting
1330    console.log('Date.parseDate("2009-03-03T13:36:54,101000Z", "c")       = %o', Date.parseDate("2009-03-03T13:36:54,101000Z", "c")); // UTC
1331    console.log('Date.parseDate("2009-04-02T14:35:53.901000-0530", "c")   = %o', Date.parseDate("2009-04-02T14:35:53.901000-0530", "c")); // GMT-0530
1332    console.log('Date.parseDate("2009-05-01T15:34:52,9876000+08:00", "c") = %o', Date.parseDate("2009-05-01T15:34:52,987600+08:00", "c")); // GMT+08:00
1333console.groupEnd();
1334
1335// ISO-8601 format as specified in http://www.w3.org/TR/NOTE-datetime
1336// -- accepts ALL 6 levels of date-time granularity
1337console.group('ISO-8601 Granularity Test (see http://www.w3.org/TR/NOTE-datetime)');
1338    console.log('Date.parseDate("1997", "c")                              = %o', Date.parseDate("1997", "c")); // YYYY (e.g. 1997)
1339    console.log('Date.parseDate("1997-07", "c")                           = %o', Date.parseDate("1997-07", "c")); // YYYY-MM (e.g. 1997-07)
1340    console.log('Date.parseDate("1997-07-16", "c")                        = %o', Date.parseDate("1997-07-16", "c")); // YYYY-MM-DD (e.g. 1997-07-16)
1341    console.log('Date.parseDate("1997-07-16T19:20+01:00", "c")            = %o', Date.parseDate("1997-07-16T19:20+01:00", "c")); // YYYY-MM-DDThh:mmTZD (e.g. 1997-07-16T19:20+01:00)
1342    console.log('Date.parseDate("1997-07-16T19:20:30+01:00", "c")         = %o', Date.parseDate("1997-07-16T19:20:30+01:00", "c")); // YYYY-MM-DDThh:mm:ssTZD (e.g. 1997-07-16T19:20:30+01:00)
1343    console.log('Date.parseDate("1997-07-16T19:20:30.45+01:00", "c")      = %o', Date.parseDate("1997-07-16T19:20:30.45+01:00", "c")); // YYYY-MM-DDThh:mm:ss.sTZD (e.g. 1997-07-16T19:20:30.45+01:00)
1344    console.log('Date.parseDate("1997-07-16 19:20:30.45+01:00", "c")      = %o', Date.parseDate("1997-07-16 19:20:30.45+01:00", "c")); // YYYY-MM-DD hh:mm:ss.sTZD (e.g. 1997-07-16T19:20:30.45+01:00)
1345    console.log('Date.parseDate("1997-13-16T19:20:30.45+01:00", "c", true)= %o', Date.parseDate("1997-13-16T19:20:30.45+01:00", "c", true)); // strict date parsing with invalid month value
1346console.groupEnd();
1347
1348*/
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