source: [view]
dojo.provide("dojox.date.islamic");
dojo.require("dojox.date.islamic.Date");
dojo.require("dojo.date"); // for compare
// Utility methods to do arithmetic calculations with islamic.Dates
// added for compat to date
dojox.date.islamic.getDaysInMonth = function(/*islamic.Date*/month){
return month.getDaysInIslamicMonth(month.getMonth(), month.getFullYear());
};
//TODO: define islamic.isLeapYear? Or should it be invalid, since it has different meaning?
dojox.date.islamic.compare = function(/*islamic.Date*/date1, /*islamic.Date*/date2, /*String?*/portion){
// summary:
// Compare two islamic date objects by date, time, or both.
// description:
// Returns 0 if equal, positive if a > b, else negative.
// date1:
// islamic.Date object
// date2:
// islamic.Date object. If not specified, the current islamic.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"
if(date1 instanceof dojox.date.islamic.Date){
date1 = date1.toGregorian();
}
if(date2 instanceof dojox.date.islamic.Date){
date2 = date2.toGregorian();
}
return dojo.date.compare.apply(null, arguments);
};
dojox.date.islamic.add = function(/*dojox.date.islamic.Date*/date, /*String*/interval, /*int*/amount){
// based on and similar to dojo.date.add
// summary:
// Add to a Date in intervals of different size, from milliseconds to years
// date: islamic.Date
// Date object to start with
// interval:
// A string representing the interval. One of the following:
// "year", "month", "day", "hour", "minute", "second",
// "millisecond", "week", "weekday"
// amount:
// How much to add to the date.
var newIslamDate = new dojox.date.islamic.Date(date);
switch(interval){
case "day":
newIslamDate.setDate(date.getDate() + amount);
break;
case "weekday":
var day = date.getDay();
if(((day + amount) < 5) && ((day + amount) > 0)){
newIslamDate.setDate(date.getDate() + amount);
}else{
var adddays = 0, /*weekend */
remdays = 0;
if(day == 5){//friday
day = 4;
remdays = (amount > 0) ? -1 : 1;
}else if(day == 6){ //shabat
day = 4;
remdays = (amount > 0) ? -2 : 2;
}
var add = (amount > 0) ? (5 - day - 1) : -day
var amountdif = amount - add;
var div = parseInt(amountdif / 5);
if(amountdif % 5 != 0){
adddays = (amount > 0) ? 2 : -2;
}
adddays = adddays + div * 7 + amountdif % 5 + add;
newIslamDate.setDate(date.getDate() + adddays + remdays);
}
break;
case "year":
newIslamDate.setFullYear(date.getFullYear() + amount);
break;
case "week":
amount *= 7;
newIslamDate.setDate(date.getDate() + amount);
break;
case "month":
var month = date.getMonth();
newIslamDate.setMonth(month + amount);
break;
case "hour":
newIslamDate.setHours(date.getHours() + amount);
break;
case "minute":
newIslamDate.setMinutes(date.getMinutes() + amount);
break;
case "second":
newIslamDate.setSeconds(date.getSeconds() + amount);
break;
case "millisecond":
newIslamDate.setMilliseconds(date.getMilliseconds() + amount);
break;
}
return newIslamDate; // dojox.date.islamic.Date
};
dojox.date.islamic.difference = function(/*dojox.date.islamic.Date*/date1, /*dojox.date.islamic.Date?*/date2, /*String?*/interval){
// based on and similar to dojo.date.difference
// summary:
// date1 - date2
// date2 is islamic.Date object. If not specified, the current islamic.Date is used.
// interval:
// A string representing the interval. One of the following:
// "year", "month", "day", "hour", "minute", "second",
// "millisecond", "week", "weekday"
// Defaults to "day".
date2 = date2 || new dojox.date.islamic.Date();
interval = interval || "day";
var yearDiff = date1.getFullYear() - date2.getFullYear();
var delta = 1; // Integer return value
switch(interval){
case "weekday":
var days = Math.round(dojox.date.islamic.difference(date1, date2, "day"));
var weeks = parseInt(dojox.date.islamic.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 = date2.getDay();
var bDay = date1.getDay();
weeks = parseInt(days/7);
mod = days % 7;
// Mark the date advanced by the number of
// round weeks (may be zero)
var dtMark = new dojox.date.islamic.Date(date2);
dtMark.setDate(dtMark.getDate()+(weeks*7));
var dayMark = dtMark.getDay();
// Spare change days -- 6 or less
if(days > 0){
switch(true){
// Range starts on Fri
case aDay == 5:
adj = -1;
break;
// Range starts on Sat
case aDay == 6:
adj = 0;
break;
// Range ends on Fri
case bDay == 5:
adj = -1;
break;
// Range ends on Sat
case bDay == 6:
adj = -2;
break;
// Range contains weekend
case (dayMark + mod) > 5:
adj = -2;
}
}else if(days < 0){
switch(true){
// Range starts on Fri
case aDay == 5:
adj = 0;
break;
// Range starts on Sat
case aDay == 6:
adj = 1;
break;
// Range ends on Fri
case bDay == 5:
adj = 2;
break;
// Range ends on Sat
case bDay == 6:
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":
var startdate = (date1.toGregorian() > date2.toGregorian()) ? date1 : date2; // more
var enddate = (date1.toGregorian() > date2.toGregorian()) ? date2 : date1;
var month1 = startdate.getMonth();
var month2 = enddate.getMonth();
if (yearDiff == 0){
delta = startdate.getMonth() - enddate.getMonth() ;
}else{
delta = 12-month2;
delta += month1;
var i = enddate.getFullYear()+1;
var e = startdate.getFullYear();
for (i; i < e; i++){
delta += 12;
}
}
if (date1.toGregorian() < date2.toGregorian()){
delta = -delta;
}
break;
case "week":
// Truncate instead of rounding
// Don't use Math.floor -- value may be negative
delta = parseInt(dojox.date.islamic.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 *= date1.toGregorian().getTime()- date2.toGregorian().getTime();
}
// Round for fractional values and DST leaps
return Math.round(delta); // Number (integer)