[FIX] web: Calendar: correctly display events

Before this rev., the events in Calendar views (month mode) weren't
correctly displayed: the last day of the event wasn't displayed as
being part of the event. For instance, in leaves, a leave of 3 days
from the 16th of Augustus until the 18th was only displayed over
the 16th and the 17th.

Moreover, when an event was created from a Calendar view with
option all_day=False, the default start and end dates weren't
correctly computed according to the user timezone, which could lead
to the creation of multiple days event whereas the user clicked on
a specific day. For instance, with timezone GMT+2, when clicking on
the 18th of Augustus in the Leave Calendar view (month mode), it
opened a dialog for the creation of a 2-day leave from the 18th to
the 19th.

This rev. fixes those two issues.

1 files changed, 14 insertions, 4 deletions

diff --git a/addons/web/static/src/js/views/calendar/calendar_model.js b/addons/web/static/src/js/views/calendar/calendar_model.js
index ed02983d957..e338ae55ece 100644
--- a/addons/web/static/src/js/views/calendar/calendar_model.js
+++ b/addons/web/static/src/js/views/calendar/calendar_model.js
@@ -45,20 +45,26 @@ return AbstractModel.extend({
         if (event.allDay || end.diff(start) % 86400000 === 0) {
             event.allDay = true;
 
-            if (this.scale === 'month') {
+            if (this.data.scale === 'month') {
+                // In month, FullCalendar gives the end day as the
+                // next day at midnight (instead of 23h59).
+                end.add(-1, 'days');
                 if (event.r_start) {
                     start.hours(event.r_start.hours())
                          .minutes(event.r_start.minutes())
                          .seconds(event.r_start.seconds())
                          .utc();
-                    end.add(-1, 'days')
-                       .hours(event.r_end.hours())
+                    end.hours(event.r_end.hours())
                        .minutes(event.r_end.minutes())
                        .seconds(event.r_end.seconds())
                        .utc();
-                } else {
+                } else if (this.mapping.all_day) {
                     start.utc();
                     end.utc();
+                } else {
+                    // default hours in the user's timezone
+                    start.hours(7).add(-this.getSession().getTZOffset(start), 'minutes');
+                    end.hours(19).add(-this.getSession().getTZOffset(end), 'minutes');
                 }
             } else if (this.mapping.all_day) {
                 start.startOf('day');
@@ -622,6 +628,10 @@ return AbstractModel.extend({
             // r.start = date_start.format('YYYY-MM-DD');
             // r.end = date_stop.format('YYYY-MM-DD');
         } else if (this.data.scale === 'month' && this.fields[this.mapping.date_start].type !== 'date') {
+            // In month, FullCalendar gives the end day as the
+            // next day at midnight (instead of 23h59).
+            date_stop.add(1, 'days');
+
             // allow to resize in month mode
             r.reset_allday = r.allDay;
             r.allDay = true;