isa/gnome-shell
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Change the algorithm used to calculate week numbers

Browse Source 
The currently used algorithm returns incorrect results in some corner
cases, so replace it with a better one.

https://bugzilla.gnome.org/show_bug.cgi?id=620125
This commit is contained in:
Mads Villadsen 2010-05-30 23:17:40 +02:00 committed by Florian Müllner
parent 0f52c924e2
commit ee79579b2e
1 changed files with 14 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
js/ui/calendar.js
View File

@ -9,7 +9,6 @@ const Shell = imports.gi.Shell;
const Gettext_gtk20 = imports.gettext.domain('gtk20');
const MSECS_IN_DAY = 24 * 60 * 60 * 1000;
const MSECS_IN_WEEK = MSECS_IN_DAY * 7;
const WEEKDATE_HEADER_WIDTH_DIGITS = 3;
const SHOW_WEEKDATE_KEY = 'show-weekdate';
@ -20,12 +19,20 @@ function _sameDay(dateA, dateB) {
}
function _getCalendarWeekForDate(date) {
let startOfYear = new Date(date.getFullYear(), 0, 1);
let sday = startOfYear.getDay();
let offset = 4 + (7 * Math.floor(sday * (1/5))) - sday;
let firstThursday = new Date(date.getFullYear(), 0, 1 + offset);
let weekOfYear = Math.ceil((date.getTime() - firstThursday.getTime()) / MSECS_IN_WEEK);
return weekOfYear;
// Based on the algorithms found here:
// http://en.wikipedia.org/wiki/Talk:ISO_week_date
let midnightDate = new Date(date.getFullYear(), date.getMonth(), date.getDate());
// Need to get Monday to be 1 ... Sunday to be 7
let dayOfWeek = 1 + ((midnightDate.getDay() + 6) % 7);
let nearestThursday = new Date(midnightDate.getFullYear(), midnightDate.getMonth(),
midnightDate.getDate() + (4 - dayOfWeek));
let jan1st = new Date(nearestThursday.getFullYear(), 0, 1);
let diffDate = nearestThursday - jan1st;
let dayNumber = Math.floor(Math.abs(diffDate) / MSECS_IN_DAY);
let weekNumber = Math.floor(dayNumber / 7) + 1;
return weekNumber;
}
function _getDigitWidth(actor){