[gnome-shell] calendar-server: Notify HasCalendar changes when updating views

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 12c7f693d0b0d37a6a1df7d1001dd8ffc40437a0
Author: Florian Müllner <fmuellner gnome org>
Date:   Thu Jun 4 22:14:15 2020 +0200

    calendar-server: Notify HasCalendar changes when updating views
    
    The HasCalendar property reflects whether there are any views, and views
    change either when clients appear/disappear or when the time range changes.
    
    However we currently only emit the PropertiesChanged signal for the former,
    fix that.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1300

 src/calendar-server/gnome-shell-calendar-server.c | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/src/calendar-server/gnome-shell-calendar-server.c 
b/src/calendar-server/gnome-shell-calendar-server.c
index 100b77b36b..b15b167854 100644
--- a/src/calendar-server/gnome-shell-calendar-server.c
+++ b/src/calendar-server/gnome-shell-calendar-server.c
@@ -721,6 +721,9 @@ static void
 app_update_views (App *app)
 {
   GSList *link, *clients;
+  gboolean had_views, has_views;
+
+  had_views = app->live_views != NULL;
 
   for (link = app->live_views; link; link = g_slist_next (link))
     {
@@ -745,6 +748,11 @@ app_update_views (App *app)
         app->live_views = g_slist_prepend (app->live_views, view);
     }
 
+  has_views = app->live_views != NULL;
+
+  if (has_views != had_views)
+    app_notify_has_calendars (app);
+
   g_slist_free_full (clients, g_object_unref);
 }