[evolution] ECompEditor: Listen for target backend property change notification

[Milan Crha <mcrha src gnome org>]

commit 0d38df9b19655f29c0a90803f4c2e83391d247a8
Author: Milan Crha <mcrha redhat com>
Date:   Fri Oct 30 10:01:00 2020 +0100

    ECompEditor: Listen for target backend property change notification
    
    To update its internal email values, when they change while the target
    client is selected.

 src/calendar/gui/e-comp-editor.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
---
diff --git a/src/calendar/gui/e-comp-editor.c b/src/calendar/gui/e-comp-editor.c
index c67001e39f..9c9b957642 100644
--- a/src/calendar/gui/e-comp-editor.c
+++ b/src/calendar/gui/e-comp-editor.c
@@ -73,6 +73,8 @@ struct _ECompEditorPrivate {
        ECompEditorPropertyPart *dtend_part;
 
        GtkWidget *restore_focus;
+
+       gulong target_backend_property_change_id;
 };
 
 enum {
@@ -1167,6 +1169,15 @@ update_activity_bar_cb (gpointer user_data)
        return FALSE;
 }
 
+static void
+e_comp_editor_disconnect_target_backend_property_change_handler (ECompEditor *comp_editor)
+{
+       if (comp_editor->priv->target_client && comp_editor->priv->target_backend_property_change_id) {
+               g_signal_handler_disconnect (comp_editor->priv->target_client, 
comp_editor->priv->target_backend_property_change_id);
+               comp_editor->priv->target_backend_property_change_id = 0;
+       }
+}
+
 static void
 e_comp_editor_open_target_client (ECompEditor *comp_editor)
 {
@@ -1196,6 +1207,7 @@ e_comp_editor_open_target_client (ECompEditor *comp_editor)
                g_clear_object (&comp_editor->priv->target_client_opening);
        }
 
+       e_comp_editor_disconnect_target_backend_property_change_handler (comp_editor);
        is_target_client_change = comp_editor->priv->target_client != NULL;
        g_clear_object (&comp_editor->priv->target_client);
 
@@ -2439,6 +2451,7 @@ e_comp_editor_dispose (GObject *object)
 
        g_clear_object (&comp_editor->priv->component);
 
+       e_comp_editor_disconnect_target_backend_property_change_handler (comp_editor);
        ece_connect_time_parts (comp_editor, NULL, NULL);
 
        g_clear_object (&comp_editor->priv->origin_source);
@@ -3055,6 +3068,25 @@ e_comp_editor_get_target_client (ECompEditor *comp_editor)
        return comp_editor->priv->target_client;
 }
 
+static void
+comp_editor_target_backend_property_changed_cb (EClient *client,
+                                               const gchar *property_name,
+                                               const gchar *property_value,
+                                               gpointer user_data)
+{
+       ECompEditor *comp_editor = user_data;
+
+       g_return_if_fail (E_IS_COMP_EDITOR (comp_editor));
+
+       if (!g_direct_equal (client, comp_editor->priv->target_client))
+               return;
+
+       if (g_strcmp0 (property_name, E_CAL_BACKEND_PROPERTY_CAL_EMAIL_ADDRESS) == 0)
+               e_comp_editor_set_cal_email_address (comp_editor, property_value);
+       else if (g_strcmp0 (property_name, E_CAL_BACKEND_PROPERTY_ALARM_EMAIL_ADDRESS) == 0)
+               e_comp_editor_set_alarm_email_address (comp_editor, property_value);
+}
+
 void
 e_comp_editor_set_target_client (ECompEditor *comp_editor,
                                 ECalClient *client)
@@ -3066,6 +3098,8 @@ e_comp_editor_set_target_client (ECompEditor *comp_editor,
 
        if (client)
                g_object_ref (client);
+
+       e_comp_editor_disconnect_target_backend_property_change_handler (comp_editor);
        g_clear_object (&comp_editor->priv->target_client);
        comp_editor->priv->target_client = client;
 
@@ -3073,6 +3107,10 @@ e_comp_editor_set_target_client (ECompEditor *comp_editor,
            e_source_equal (e_client_get_source (E_CLIENT (client)), comp_editor->priv->origin_source))
                e_comp_editor_set_source_client (comp_editor, client);
 
+       if (client) {
+               comp_editor->priv->target_backend_property_change_id = g_signal_connect (client,
+                       "backend-property-changed", G_CALLBACK 
(comp_editor_target_backend_property_changed_cb), comp_editor);
+       }
        e_comp_editor_sensitize_widgets (comp_editor);
 
        g_object_notify (G_OBJECT (comp_editor), "target-client");