[gnome-shell] calendar: Stop computing week number ourselves

[Florian Müllner <fmuellner src gnome org>]

commit 1e8e5d4671f017926098fdf6bd79310372607713
Author: Florian Müllner <fmuellner gnome org>
Date:   Thu Nov 13 15:14:56 2014 +0000

    calendar: Stop computing week number ourselves
    
    Correctly computing the ISO week number is tricky and we already
    have code in the platform to do it, so just refer its computation
    to GDateTime rather than doing it ourselves.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=736722

 js/ui/calendar.js |   19 +------------------
 1 files changed, 1 insertions(+), 18 deletions(-)
---
diff --git a/js/ui/calendar.js b/js/ui/calendar.js
index 127eb2d..4132c00 100644
--- a/js/ui/calendar.js
+++ b/js/ui/calendar.js
@@ -88,23 +88,6 @@ function _formatEventTime(event, clockFormat, periodBegin, periodEnd) {
     return ret;
 }
 
-function _getCalendarWeekForDate(date) {
-    // 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 _getCalendarDayAbbreviation(dayNumber) {
     let abbreviations = [
         /* Translators: Calendar grid abbreviation for Sunday.
@@ -669,7 +652,7 @@ const Calendar = new Lang.Class({
             this._buttons.push(button);
 
             if (this._useWeekdate && iter.getDay() == 4) {
-                let label = new St.Label({ text: _getCalendarWeekForDate(iter).toString(),
+                let label = new St.Label({ text: iter.toLocaleFormat('%V'),
                                            style_class: 'calendar-day-base calendar-week-number'});
                 layout.attach(label, rtl ? 7 : 0, row, 1, 1);
             }