gecko-dev/calendar/resources/content/dateUtils.js
2003-03-19 18:10:21 +00:00

281 lines
9.4 KiB
JavaScript

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is OEone Calendar Code, released October 31st, 2001.
*
* The Initial Developer of the Original Code is
* OEone Corporation.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s): Garth Smedley <garths@oeone.com>
* Mike Potter <mikep@oeone.com>
* Eric Belhaire <belhaire@ief.u-psud.fr>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
// scriptable date formater, for pretty printing dates
var nsIScriptableDateFormat = Components.interfaces.nsIScriptableDateFormat;
var dateService = Components.classes["@mozilla.org/intl/scriptabledateformat;1"].getService(nsIScriptableDateFormat);
var kDate_MillisecondsInSecond = 1000;
var kDate_SecondsInMinute = 60;
var kDate_MinutesInHour = 60;
var kDate_HoursInDay = 24;
var kDate_DaysInWeek = 7;
var kDate_SecondsInHour = 3600;
var kDate_SecondsInDay = 86400
var kDate_SecondsInWeek = 604800
var kDate_MinutesInDay = 1440;
var kDate_MinutesInWeek = 10080;
var kDate_MillisecondsInMinute = 60000;
var kDate_MillisecondsInHour = 3600000;
var kDate_MillisecondsInDay = 86400000;
var kDate_MillisecondsInWeek = 604800000;
// required includes: "chrome://global/content/strres.js" - String Bundle Code
function DateUtils()
{
}
DateUtils.getLastDayOfMonth = function( year, month )
{
var pastLastDate = new Date( year, month, 32 );
var lastDayOfMonth = 32 - pastLastDate.getDate();
return lastDayOfMonth;
}
DateUtils.getWeekNumber = function(date)
{
//ISO Week Number(01-53) for any date
//code adapted from http://www.pvv.org/~nsaa/ISO8601.html
///////////////////
// Calculate some date for this Year
///////////////////
var Year = date.getFullYear();
var FirstOfYear = new Date(Year,0,1) ;
var LastOfYear = new Date(Year,11,31) ;
var FirstDayNum = FirstOfYear.getDay() ;
// ISO weeks start on Monday (day 1) and ends on Sunday (day 7)
var ISOFirstDayNum = (FirstDayNum ==0)? 7 : FirstDayNum ;
// Week 1 of any year is the week that contains the first Thursday
// in January : true if 1 Jan = mon - thu. WeekNumber is then 1
var IsFirstWeek = ( ( 7 - ISOFirstDayNum ) > 2 )? 1 : 0 ;
// The first Monday after 1 Jan this Year
var FirstMonday = 9 - ISOFirstDayNum ;
// Number of Days from 1 Jan to date
var msOffset = ( FirstOfYear.getTimezoneOffset() - date.getTimezoneOffset() ) * kDate_MillisecondsInMinute;
var DaysToDate = Math.floor((date.getTime()+msOffset-FirstOfYear.getTime())/kDate_MillisecondsInDay)+1 ;
// Number of Days in Year (either 365 or 366);
var DaysInYear = (LastOfYear.getTime()-FirstOfYear.getTime())/kDate_MillisecondsInDay+1 ;
// Number of Weeks in Year. Most years have 52 weeks, but years that start on
// a Thursday and leapyears that starts on a Wednesday or a Thursday have 53 weeks
var NumberOfWeeksThisYear =
(ISOFirstDayNum==4 || (ISOFirstDayNum==3 && DaysInYear==366)) ? 53 : 52;
// "***********************************";
// " Calculate some data for last Year ";
// "***********************************";
var FirstOfLastYear = new Date(Year-1,0,1) ;
var LastOfLastYear = new Date(Year-1,11,31) ;
var FirstDayNumLast = FirstOfLastYear.getDay() ;
// ISO weeks start on Monday (day 1) and ends on Sunday (day 7)
var ISOFirstDayNumLast = (FirstDayNumLast ==0)? 7 : FirstDayNumLast ;
// Number of Days in Year (either 365 or 366);
var DaysInLastYear = (LastOfLastYear.getTime()-FirstOfLastYear.getTime())/kDate_MillisecondsInDay+1 ;
// Number of Weeks in Year. Most years have 52 weeks, but years that start on
// a Thursday and leapyears that starts on a Wednesday or a Thursday have 53 weeks
var NumberOfWeeksLastYear =
(ISOFirstDayNumLast==4 || (ISOFirstDayNumLast==3 && DaysInLastYear==366)) ? 53 : 52;
// "****************************";
// " Calculates the Week Number ";
// "****************************";
var DateDayNum = date.getDay() ;
var ISODateDayNum = (DateDayNum ==0)? 7 : DateDayNum ;
// Is Date in the last Week of last Year ?
if( (DaysToDate < FirstMonday) && (IsFirstWeek == 0) )
return(NumberOfWeeksLastYear) ;
// "Calculate number of Complete Weeks Between D and 1.jan";
var ComplNumWeeks = Math.floor((DaysToDate-FirstMonday)/7);
// "Are there remaining days?";
var RemainingDays = ( (DaysToDate+1-(FirstMonday+7*ComplNumWeeks))>0 );
var NumWeeks = IsFirstWeek+ComplNumWeeks+1;
if(RemainingDays)
{
if(NumWeeks>52 && NumWeeks>NumberOfWeeksThisYear )
return( 1 );
else
return( NumWeeks );
}
else
return( NumWeeks - 1 );
}
function DateFormater( )
{
// we get the date bundle in case the locale changes, can
// we be notified of a locale change instead, then we could
// get the bundle once.
this.dateStringBundle = srGetStrBundle("chrome://calendar/locale/dateFormat.properties");
}
DateFormater.prototype.getFormatedTime = function( date )
{
return( dateService.FormatTime( "", dateService.timeFormatNoSeconds, date.getHours(), date.getMinutes(), 0 ) );
}
DateFormater.prototype.getFormatedDate = function( date )
{
// Format the date using a hardcoded format for now, since everything
// that displays the date uses this function we will be able to
// make a user settable date format and use it here.
try
{
if( getIntPref(gCalendarWindow.calendarPreferences.calendarPref, "date.format", 0 ) == 0 )
return( this.getLongFormatedDate( date ) );
else
return( this.getShortFormatedDate( date ) );
}
catch(ex)
{
return "";
}
}
DateFormater.prototype.getLongFormatedDate = function( date )
{
if( (navigator.platform.indexOf("Win") == 0) || (navigator.platform.indexOf("Mac") != -1) )
{
return( dateService.FormatDate( "", dateService.dateFormatLong, date.getFullYear(), date.getMonth()+1, date.getDate() ) );
}
else
{
// HACK We are probably on Linux and want a string in long format.
// dateService.dateFormatLong on Linux returns a short string, so build our own
// this should move into Mozilla or libxpical
var oneBasedMonthNum = date.getMonth() + 1;
var monthString = this.dateStringBundle.GetStringFromName("month." + oneBasedMonthNum + ".Mmm" );
var dateString = monthString + " " + date.getDate()+", "+date.getFullYear();
return dateString;
}
}
DateFormater.prototype.getShortFormatedDate = function( date )
{
return( dateService.FormatDate( "", dateService.dateFormatShort, date.getFullYear(), date.getMonth()+1, date.getDate() ) );
}
DateFormater.prototype.getFormatedDateWithoutYear = function( date )
{
// Format the date using a hardcoded format for now, since everything
// that displays the date uses this function we will be able to
// make a user settable date format and use it here.
var oneBasedMonthNum = date.getMonth() + 1;
var monthString = this.dateStringBundle.GetStringFromName("month." + oneBasedMonthNum + ".Mmm" );
var dateString = monthString + " " + date.getDate();
return dateString;
}
// 0-11 Month Index
DateFormater.prototype.getMonthName = function( monthIndex )
{
var oneBasedMonthNum = monthIndex + 1;
var monthName = this.dateStringBundle.GetStringFromName("month." + oneBasedMonthNum + ".name" );
return monthName;
}
// 0-11 Month Index
DateFormater.prototype.getShortMonthName = function( monthIndex )
{
var oneBasedMonthNum = monthIndex + 1;
var monthName = this.dateStringBundle.GetStringFromName("month." + oneBasedMonthNum + ".Mmm" );
return monthName;
}
// 0-6 Day index ( starts at Sun )
DateFormater.prototype.getDayName = function( dayIndex )
{
var oneBasedDayNum = dayIndex + 1;
var dayName = this.dateStringBundle.GetStringFromName("day." + oneBasedDayNum + ".name" );
return dayName;
}
// 0-6 Day index ( starts at Sun )
DateFormater.prototype.getShortDayName = function( dayIndex )
{
var oneBasedDayNum = dayIndex + 1;
var dayName = this.dateStringBundle.GetStringFromName("day." + oneBasedDayNum + ".Mmm" );
return dayName;
}