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

diff --git a/js/ui/calendar.js b/js/ui/calendar.js
index 127eb2d2d66161310d306c10d90ec4227449dd3d..4132c00e4881d5d8483205e4487e43619807420d 100644 (file)
--- 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);
             }