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adding (c) info to date.js

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1 parent e47a65f commit afd7269a342b726404351f1804a0bfb56a67c2d0 Peter Higgins committed Jun 8, 2010
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  1. +320 −310 date.js
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630 date.js
@@ -1,338 +1,348 @@
+/*
+
+ jQuery Date utility plugin by Peter Higgins (dante@dojotoolkit.org)
+
+ Based on (actually, diretly ported from) Dojo date.js
+
+ Original is (c) Dojo Foundation 2004-2010. Released under either AFL or new BSD, see:
+ http://dojofoundation.org/license for more information.
+
+*/
(function(dojo){
- dojo.date = {
- // summary: Date manipulation utilities
- };
-
- dojo.date.getDaysInMonth = function(/*Date*/dateObject){
- // summary:
- // Returns the number of days in the month used by dateObject
- var month = dateObject.getMonth();
- var days = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
- if(month == 1 && dojo.date.isLeapYear(dateObject)){ return 29; } // Number
- return days[month]; // Number
- }
+ dojo.date = {
+ // summary: Date manipulation utilities
+ };
+
+ dojo.date.getDaysInMonth = function(/*Date*/dateObject){
+ // summary:
+ // Returns the number of days in the month used by dateObject
+ var month = dateObject.getMonth();
+ var days = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
+ if(month == 1 && dojo.date.isLeapYear(dateObject)){ return 29; } // Number
+ return days[month]; // Number
+ }
- dojo.date.isLeapYear = function(/*Date*/dateObject){
- // summary:
- // Determines if the year of the dateObject is a leap year
- // description:
- // Leap years are years with an additional day YYYY-02-29, where the
- // year number is a multiple of four with the following exception: If
- // a year is a multiple of 100, then it is only a leap year if it is
- // also a multiple of 400. For example, 1900 was not a leap year, but
- // 2000 is one.
+ dojo.date.isLeapYear = function(/*Date*/dateObject){
+ // summary:
+ // Determines if the year of the dateObject is a leap year
+ // description:
+ // Leap years are years with an additional day YYYY-02-29, where the
+ // year number is a multiple of four with the following exception: If
+ // a year is a multiple of 100, then it is only a leap year if it is
+ // also a multiple of 400. For example, 1900 was not a leap year, but
+ // 2000 is one.
- var year = dateObject.getFullYear();
- return !(year%400) || (!(year%4) && !!(year%100)); // Boolean
- }
+ var year = dateObject.getFullYear();
+ return !(year%400) || (!(year%4) && !!(year%100)); // Boolean
+ }
- // FIXME: This is not localized
- dojo.date.getTimezoneName = function(/*Date*/dateObject){
- // summary:
- // Get the user's time zone as provided by the browser
- // dateObject:
- // Needed because the timezone may vary with time (daylight savings)
- // description:
- // Try to get time zone info from toString or toLocaleString method of
- // the Date object -- UTC offset is not a time zone. See
- // http://www.twinsun.com/tz/tz-link.htm Note: results may be
- // inconsistent across browsers.
+ // FIXME: This is not localized
+ dojo.date.getTimezoneName = function(/*Date*/dateObject){
+ // summary:
+ // Get the user's time zone as provided by the browser
+ // dateObject:
+ // Needed because the timezone may vary with time (daylight savings)
+ // description:
+ // Try to get time zone info from toString or toLocaleString method of
+ // the Date object -- UTC offset is not a time zone. See
+ // http://www.twinsun.com/tz/tz-link.htm Note: results may be
+ // inconsistent across browsers.
- var str = dateObject.toString(); // Start looking in toString
- var tz = ''; // The result -- return empty string if nothing found
- var match;
+ var str = dateObject.toString(); // Start looking in toString
+ var tz = ''; // The result -- return empty string if nothing found
+ var match;
- // First look for something in parentheses -- fast lookup, no regex
- var pos = str.indexOf('(');
- if(pos > -1){
- tz = str.substring(++pos, str.indexOf(')'));
- }else{
- // If at first you don't succeed ...
- // If IE knows about the TZ, it appears before the year
- // Capital letters or slash before a 4-digit year
- // at the end of string
- var pat = /([A-Z\/]+) \d{4}$/;
- if((match = str.match(pat))){
- tz = match[1];
- }else{
- // Some browsers (e.g. Safari) glue the TZ on the end
- // of toLocaleString instead of putting it in toString
- str = dateObject.toLocaleString();
- // Capital letters or slash -- end of string,
- // after space
- pat = / ([A-Z\/]+)$/;
- if((match = str.match(pat))){
- tz = match[1];
- }
- }
- }
+ // First look for something in parentheses -- fast lookup, no regex
+ var pos = str.indexOf('(');
+ if(pos > -1){
+ tz = str.substring(++pos, str.indexOf(')'));
+ }else{
+ // If at first you don't succeed ...
+ // If IE knows about the TZ, it appears before the year
+ // Capital letters or slash before a 4-digit year
+ // at the end of string
+ var pat = /([A-Z\/]+) \d{4}$/;
+ if((match = str.match(pat))){
+ tz = match[1];
+ }else{
+ // Some browsers (e.g. Safari) glue the TZ on the end
+ // of toLocaleString instead of putting it in toString
+ str = dateObject.toLocaleString();
+ // Capital letters or slash -- end of string,
+ // after space
+ pat = / ([A-Z\/]+)$/;
+ if((match = str.match(pat))){
+ tz = match[1];
+ }
+ }
+ }
- // Make sure it doesn't somehow end up return AM or PM
- return (tz == 'AM' || tz == 'PM') ? '' : tz; // String
- }
+ // Make sure it doesn't somehow end up return AM or PM
+ return (tz == 'AM' || tz == 'PM') ? '' : tz; // String
+ }
- // Utility methods to do arithmetic calculations with Dates
+ // Utility methods to do arithmetic calculations with Dates
- dojo.date.compare = function(/*Date*/date1, /*Date?*/date2, /*String?*/portion){
- // summary:
- // Compare two date objects by date, time, or both.
- // description:
- // Returns 0 if equal, positive if a > b, else negative.
- // date1:
- // Date object
- // date2:
- // Date object. If not specified, the current Date is used.
- // portion:
- // A string indicating the "date" or "time" portion of a Date object.
- // Compares both "date" and "time" by default. One of the following:
- // "date", "time", "datetime"
+ dojo.date.compare = function(/*Date*/date1, /*Date?*/date2, /*String?*/portion){
+ // summary:
+ // Compare two date objects by date, time, or both.
+ // description:
+ // Returns 0 if equal, positive if a > b, else negative.
+ // date1:
+ // Date object
+ // date2:
+ // Date object. If not specified, the current Date is used.
+ // portion:
+ // A string indicating the "date" or "time" portion of a Date object.
+ // Compares both "date" and "time" by default. One of the following:
+ // "date", "time", "datetime"
- // Extra step required in copy for IE - see #3112
- date1 = new Date(+date1);
- date2 = new Date(+(date2 || new Date()));
+ // Extra step required in copy for IE - see #3112
+ date1 = new Date(+date1);
+ date2 = new Date(+(date2 || new Date()));
- if(portion == "date"){
- // Ignore times and compare dates.
- date1.setHours(0, 0, 0, 0);
- date2.setHours(0, 0, 0, 0);
- }else if(portion == "time"){
- // Ignore dates and compare times.
- date1.setFullYear(0, 0, 0);
- date2.setFullYear(0, 0, 0);
- }
-
- if(date1 > date2){ return 1; } // int
- if(date1 < date2){ return -1; } // int
- return 0; // int
- };
+ if(portion == "date"){
+ // Ignore times and compare dates.
+ date1.setHours(0, 0, 0, 0);
+ date2.setHours(0, 0, 0, 0);
+ }else if(portion == "time"){
+ // Ignore dates and compare times.
+ date1.setFullYear(0, 0, 0);
+ date2.setFullYear(0, 0, 0);
+ }
+
+ if(date1 > date2){ return 1; } // int
+ if(date1 < date2){ return -1; } // int
+ return 0; // int
+ };
- dojo.date.add = function(/*Date*/date, /*String*/interval, /*int*/amount){
- // summary:
- // Add to a Date in intervals of different size, from milliseconds to years
- // date: Date
- // Date object to start with
- // interval:
- // A string representing the interval. One of the following:
- // "year", "month", "day", "hour", "minute", "second",
- // "millisecond", "quarter", "week", "weekday"
- // amount:
- // How much to add to the date.
+ dojo.date.add = function(/*Date*/date, /*String*/interval, /*int*/amount){
+ // summary:
+ // Add to a Date in intervals of different size, from milliseconds to years
+ // date: Date
+ // Date object to start with
+ // interval:
+ // A string representing the interval. One of the following:
+ // "year", "month", "day", "hour", "minute", "second",
+ // "millisecond", "quarter", "week", "weekday"
+ // amount:
+ // How much to add to the date.
- var sum = new Date(+date); // convert to Number before copying to accomodate IE (#3112)
- var fixOvershoot = false;
- var property = "Date";
+ var sum = new Date(+date); // convert to Number before copying to accomodate IE (#3112)
+ var fixOvershoot = false;
+ var property = "Date";
- switch(interval){
- case "day":
- break;
- case "weekday":
- //i18n FIXME: assumes Saturday/Sunday weekend, but this is not always true. see dojo.cldr.supplemental
+ switch(interval){
+ case "day":
+ break;
+ case "weekday":
+ //i18n FIXME: assumes Saturday/Sunday weekend, but this is not always true. see dojo.cldr.supplemental
- // Divide the increment time span into weekspans plus leftover days
- // e.g., 8 days is one 5-day weekspan / and two leftover days
- // Can't have zero leftover days, so numbers divisible by 5 get
- // a days value of 5, and the remaining days make up the number of weeks
- var days, weeks;
- var mod = amount % 5;
- if(!mod){
- days = (amount > 0) ? 5 : -5;
- weeks = (amount > 0) ? ((amount-5)/5) : ((amount+5)/5);
- }else{
- days = mod;
- weeks = parseInt(amount/5);
- }
- // Get weekday value for orig date param
- var strt = date.getDay();
- // Orig date is Sat / positive incrementer
- // Jump over Sun
- var adj = 0;
- if(strt == 6 && amount > 0){
- adj = 1;
- }else if(strt == 0 && amount < 0){
- // Orig date is Sun / negative incrementer
- // Jump back over Sat
- adj = -1;
- }
- // Get weekday val for the new date
- var trgt = strt + days;
- // New date is on Sat or Sun
- if(trgt == 0 || trgt == 6){
- adj = (amount > 0) ? 2 : -2;
- }
- // Increment by number of weeks plus leftover days plus
- // weekend adjustments
- amount = (7 * weeks) + days + adj;
- break;
- case "year":
- property = "FullYear";
- // Keep increment/decrement from 2/29 out of March
- fixOvershoot = true;
- break;
- case "week":
- amount *= 7;
- break;
- case "quarter":
- // Naive quarter is just three months
- amount *= 3;
- // fallthrough...
- case "month":
- // Reset to last day of month if you overshoot
- fixOvershoot = true;
- property = "Month";
- break;
- // case "hour":
- // case "minute":
- // case "second":
- // case "millisecond":
- default:
- property = "UTC"+interval.charAt(0).toUpperCase() + interval.substring(1) + "s";
- }
+ // Divide the increment time span into weekspans plus leftover days
+ // e.g., 8 days is one 5-day weekspan / and two leftover days
+ // Can't have zero leftover days, so numbers divisible by 5 get
+ // a days value of 5, and the remaining days make up the number of weeks
+ var days, weeks;
+ var mod = amount % 5;
+ if(!mod){
+ days = (amount > 0) ? 5 : -5;
+ weeks = (amount > 0) ? ((amount-5)/5) : ((amount+5)/5);
+ }else{
+ days = mod;
+ weeks = parseInt(amount/5);
+ }
+ // Get weekday value for orig date param
+ var strt = date.getDay();
+ // Orig date is Sat / positive incrementer
+ // Jump over Sun
+ var adj = 0;
+ if(strt == 6 && amount > 0){
+ adj = 1;
+ }else if(strt == 0 && amount < 0){
+ // Orig date is Sun / negative incrementer
+ // Jump back over Sat
+ adj = -1;
+ }
+ // Get weekday val for the new date
+ var trgt = strt + days;
+ // New date is on Sat or Sun
+ if(trgt == 0 || trgt == 6){
+ adj = (amount > 0) ? 2 : -2;
+ }
+ // Increment by number of weeks plus leftover days plus
+ // weekend adjustments
+ amount = (7 * weeks) + days + adj;
+ break;
+ case "year":
+ property = "FullYear";
+ // Keep increment/decrement from 2/29 out of March
+ fixOvershoot = true;
+ break;
+ case "week":
+ amount *= 7;
+ break;
+ case "quarter":
+ // Naive quarter is just three months
+ amount *= 3;
+ // fallthrough...
+ case "month":
+ // Reset to last day of month if you overshoot
+ fixOvershoot = true;
+ property = "Month";
+ break;
+ // case "hour":
+ // case "minute":
+ // case "second":
+ // case "millisecond":
+ default:
+ property = "UTC"+interval.charAt(0).toUpperCase() + interval.substring(1) + "s";
+ }
- if(property){
- sum["set"+property](sum["get"+property]()+amount);
- }
+ if(property){
+ sum["set"+property](sum["get"+property]()+amount);
+ }
- if(fixOvershoot && (sum.getDate() < date.getDate())){
- sum.setDate(0);
- }
+ if(fixOvershoot && (sum.getDate() < date.getDate())){
+ sum.setDate(0);
+ }
- return sum; // Date
- };
+ return sum; // Date
+ };
- dojo.date.difference = function(/*Date*/date1, /*Date?*/date2, /*String?*/interval){
- // summary:
- // Get the difference in a specific unit of time (e.g., number of
- // months, weeks, days, etc.) between two dates, rounded to the
- // nearest integer.
- // date1:
- // Date object
- // date2:
- // Date object. If not specified, the current Date is used.
- // interval:
- // A string representing the interval. One of the following:
- // "year", "month", "day", "hour", "minute", "second",
- // "millisecond", "quarter", "week", "weekday"
- // Defaults to "day".
+ dojo.date.difference = function(/*Date*/date1, /*Date?*/date2, /*String?*/interval){
+ // summary:
+ // Get the difference in a specific unit of time (e.g., number of
+ // months, weeks, days, etc.) between two dates, rounded to the
+ // nearest integer.
+ // date1:
+ // Date object
+ // date2:
+ // Date object. If not specified, the current Date is used.
+ // interval:
+ // A string representing the interval. One of the following:
+ // "year", "month", "day", "hour", "minute", "second",
+ // "millisecond", "quarter", "week", "weekday"
+ // Defaults to "day".
- date2 = date2 || new Date();
- interval = interval || "day";
- var yearDiff = date2.getFullYear() - date1.getFullYear();
- var delta = 1; // Integer return value
+ date2 = date2 || new Date();
+ interval = interval || "day";
+ var yearDiff = date2.getFullYear() - date1.getFullYear();
+ var delta = 1; // Integer return value
- switch(interval){
- case "quarter":
- var m1 = date1.getMonth();
- var m2 = date2.getMonth();
- // Figure out which quarter the months are in
- var q1 = Math.floor(m1/3) + 1;
- var q2 = Math.floor(m2/3) + 1;
- // Add quarters for any year difference between the dates
- q2 += (yearDiff * 4);
- delta = q2 - q1;
- break;
- case "weekday":
- var days = Math.round(dojo.date.difference(date1, date2, "day"));
- var weeks = parseInt(dojo.date.difference(date1, date2, "week"));
- var mod = days % 7;
+ switch(interval){
+ case "quarter":
+ var m1 = date1.getMonth();
+ var m2 = date2.getMonth();
+ // Figure out which quarter the months are in
+ var q1 = Math.floor(m1/3) + 1;
+ var q2 = Math.floor(m2/3) + 1;
+ // Add quarters for any year difference between the dates
+ q2 += (yearDiff * 4);
+ delta = q2 - q1;
+ break;
+ case "weekday":
+ var days = Math.round(dojo.date.difference(date1, date2, "day"));
+ var weeks = parseInt(dojo.date.difference(date1, date2, "week"));
+ var mod = days % 7;
- // Even number of weeks
- if(mod == 0){
- days = weeks*5;
- }else{
- // Weeks plus spare change (< 7 days)
- var adj = 0;
- var aDay = date1.getDay();
- var bDay = date2.getDay();
+ // Even number of weeks
+ if(mod == 0){
+ days = weeks*5;
+ }else{
+ // Weeks plus spare change (< 7 days)
+ var adj = 0;
+ var aDay = date1.getDay();
+ var bDay = date2.getDay();
- weeks = parseInt(days/7);
- mod = days % 7;
- // Mark the date advanced by the number of
- // round weeks (may be zero)
- var dtMark = new Date(date1);
- dtMark.setDate(dtMark.getDate()+(weeks*7));
- var dayMark = dtMark.getDay();
+ weeks = parseInt(days/7);
+ mod = days % 7;
+ // Mark the date advanced by the number of
+ // round weeks (may be zero)
+ var dtMark = new Date(date1);
+ dtMark.setDate(dtMark.getDate()+(weeks*7));
+ var dayMark = dtMark.getDay();
- // Spare change days -- 6 or less
- if(days > 0){
- switch(true){
- // Range starts on Sat
- case aDay == 6:
- adj = -1;
- break;
- // Range starts on Sun
- case aDay == 0:
- adj = 0;
- break;
- // Range ends on Sat
- case bDay == 6:
- adj = -1;
- break;
- // Range ends on Sun
- case bDay == 0:
- adj = -2;
- break;
- // Range contains weekend
- case (dayMark + mod) > 5:
- adj = -2;
- }
- }else if(days < 0){
- switch(true){
- // Range starts on Sat
- case aDay == 6:
- adj = 0;
- break;
- // Range starts on Sun
- case aDay == 0:
- adj = 1;
- break;
- // Range ends on Sat
- case bDay == 6:
- adj = 2;
- break;
- // Range ends on Sun
- case bDay == 0:
- adj = 1;
- break;
- // Range contains weekend
- case (dayMark + mod) < 0:
- adj = 2;
- }
- }
- days += adj;
- days -= (weeks*2);
- }
- delta = days;
- break;
- case "year":
- delta = yearDiff;
- break;
- case "month":
- delta = (date2.getMonth() - date1.getMonth()) + (yearDiff * 12);
- break;
- case "week":
- // Truncate instead of rounding
- // Don't use Math.floor -- value may be negative
- delta = parseInt(dojo.date.difference(date1, date2, "day")/7);
- break;
- case "day":
- delta /= 24;
- // fallthrough
- case "hour":
- delta /= 60;
- // fallthrough
- case "minute":
- delta /= 60;
- // fallthrough
- case "second":
- delta /= 1000;
- // fallthrough
- case "millisecond":
- delta *= date2.getTime() - date1.getTime();
- }
+ // Spare change days -- 6 or less
+ if(days > 0){
+ switch(true){
+ // Range starts on Sat
+ case aDay == 6:
+ adj = -1;
+ break;
+ // Range starts on Sun
+ case aDay == 0:
+ adj = 0;
+ break;
+ // Range ends on Sat
+ case bDay == 6:
+ adj = -1;
+ break;
+ // Range ends on Sun
+ case bDay == 0:
+ adj = -2;
+ break;
+ // Range contains weekend
+ case (dayMark + mod) > 5:
+ adj = -2;
+ }
+ }else if(days < 0){
+ switch(true){
+ // Range starts on Sat
+ case aDay == 6:
+ adj = 0;
+ break;
+ // Range starts on Sun
+ case aDay == 0:
+ adj = 1;
+ break;
+ // Range ends on Sat
+ case bDay == 6:
+ adj = 2;
+ break;
+ // Range ends on Sun
+ case bDay == 0:
+ adj = 1;
+ break;
+ // Range contains weekend
+ case (dayMark + mod) < 0:
+ adj = 2;
+ }
+ }
+ days += adj;
+ days -= (weeks*2);
+ }
+ delta = days;
+ break;
+ case "year":
+ delta = yearDiff;
+ break;
+ case "month":
+ delta = (date2.getMonth() - date1.getMonth()) + (yearDiff * 12);
+ break;
+ case "week":
+ // Truncate instead of rounding
+ // Don't use Math.floor -- value may be negative
+ delta = parseInt(dojo.date.difference(date1, date2, "day")/7);
+ break;
+ case "day":
+ delta /= 24;
+ // fallthrough
+ case "hour":
+ delta /= 60;
+ // fallthrough
+ case "minute":
+ delta /= 60;
+ // fallthrough
+ case "second":
+ delta /= 1000;
+ // fallthrough
+ case "millisecond":
+ delta *= date2.getTime() - date1.getTime();
+ }
- // Round for fractional values and DST leaps
- return Math.round(delta); // Number (integer)
- };
+ // Round for fractional values and DST leaps
+ return Math.round(delta); // Number (integer)
+ };
})(jQuery);

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