[evolution/gnome-3-18] Bug 758650 - Use notification actions only when supported

[Milan Crha <mcrha src gnome org>]

commit 0ca2de1c30f38ac2bdcc1f375aa6ed1b8f3fefbf
Author: Sebastien Bacher <seb128 ubuntu com>
Date:   Wed Nov 25 15:52:54 2015 +0100

    Bug 758650 - Use notification actions only when supported

 calendar/alarm-notify/alarm-queue.c |   36 ++++++++++++++++++++++++++++++++--
 1 files changed, 33 insertions(+), 3 deletions(-)
---
diff --git a/calendar/alarm-notify/alarm-queue.c b/calendar/alarm-notify/alarm-queue.c
index dbb18ec..b465035 100644
--- a/calendar/alarm-notify/alarm-queue.c
+++ b/calendar/alarm-notify/alarm-queue.c
@@ -1833,6 +1833,34 @@ notify_open_appointments_cb (NotifyNotification *notification,
        tray_icon_clicked_cb (NULL, &event, NULL);
 }
 
+/* Check if actions are supported by the notification daemon.
+ * This is really only for Ubuntu's Notify OSD, which does not
+ * support actions.  Pretty much all other implementations do. */
+static gboolean
+can_support_actions (void)
+{
+       static gboolean supports_actions = FALSE;
+       static gboolean have_checked = FALSE;
+
+       if (!have_checked) {
+               GList *caps = NULL;
+               GList *match;
+
+               have_checked = TRUE;
+
+               caps = notify_get_server_caps ();
+
+               match = g_list_find_custom (
+                       caps, "actions", (GCompareFunc) strcmp);
+               supports_actions = (match != NULL);
+
+               g_list_foreach (caps, (GFunc) g_free, NULL);
+               g_list_free (caps);
+       }
+
+       return supports_actions;
+}
+
 static void
 popup_notification (time_t trigger,
                     CompQueuedAlarms *cqa,
@@ -1916,9 +1944,11 @@ popup_notification (time_t trigger,
                qa->notify, "desktop-entry",
                g_variant_new_string (PACKAGE));
 
-       notify_notification_add_action (
-               qa->notify, "open-appointments", _("Appointments"),
-               notify_open_appointments_cb, NULL, NULL);
+       if (can_support_actions ()) {
+               notify_notification_add_action (
+                       qa->notify, "open-appointments", _("Appointments"),
+                       notify_open_appointments_cb, NULL, NULL);
+       }
 
        if (!notify_notification_show (qa->notify, &error))
                g_warning ("Could not send notification to daemon: %s\n", error ? error->message : "Unknown 
error");