[evolution] I#378 - Inconsistent Icons for Tasks with Attendees in To-Do bar

[Milan Crha <mcrha src gnome org>]

commit d4d905aaba2e3da223497643f86c08d062b86313
Author: Milan Crha <mcrha redhat com>
Date:   Fri Mar 29 10:07:05 2019 +0100

    I#378 - Inconsistent Icons for Tasks with Attendees in To-Do bar
    
    Closes https://gitlab.gnome.org/GNOME/evolution/issues/378

 src/calendar/gui/e-to-do-pane.c | 33 ++++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)
---
diff --git a/src/calendar/gui/e-to-do-pane.c b/src/calendar/gui/e-to-do-pane.c
index fdf55c9e68..a9730a8ee8 100644
--- a/src/calendar/gui/e-to-do-pane.c
+++ b/src/calendar/gui/e-to-do-pane.c
@@ -28,6 +28,7 @@
 #include "e-cal-data-model-subscriber.h"
 #include "e-cal-dialogs.h"
 #include "e-cal-ops.h"
+#include "itip-utils.h"
 #include "misc.h"
 
 #include "e-to-do-pane.h"
@@ -902,10 +903,36 @@ etdp_add_component (EToDoPane *to_do_pane,
 
        g_slist_free_full (new_root_paths, (GDestroyNotify) gtk_tree_path_free);
 
-       if (e_cal_component_has_attendees (comp)) {
-               if (is_task)
+       if (is_task && e_cal_component_has_recurrences (comp)) {
+               icon_name = "stock_task-recurring";
+       } else if (e_cal_component_has_attendees (comp)) {
+               if (is_task) {
+                       ESourceRegistry *registry;
+
                        icon_name = "stock_task-assigned";
-               else
+                       registry = e_source_registry_watcher_get_registry (to_do_pane->priv->watcher);
+
+                       if (itip_organizer_is_user (registry, comp, client)) {
+                               icon_name = "stock_task-assigned-to";
+                       } else {
+                               GSList *attendees = NULL, *link;
+
+                               e_cal_component_get_attendee_list (comp, &attendees);
+                               for (link = attendees; link; link = g_slist_next (link)) {
+                                       ECalComponentAttendee *ca = link->data;
+                                       const gchar *text;
+
+                                       text = itip_strip_mailto (ca->value);
+                                       if (itip_address_is_user (registry, text)) {
+                                               if (ca->delto != NULL)
+                                                       icon_name = "stock_task-assigned-to";
+                                               break;
+                                       }
+                               }
+
+                               e_cal_component_free_attendee_list (attendees);
+                       }
+               } else
                        icon_name = "stock_people";
        } else {
                if (is_task)