[evolution] I#475 - Show what the "Default" glib network manager is

[Milan Crha <mcrha src gnome org>]

commit 64e1ddb5f29d70207a73ab0317a13a132465d1bb
Author: Milan Crha <mcrha redhat com>
Date:   Thu Jun 6 16:18:40 2019 +0200

    I#475 - Show what the "Default" glib network manager is
    
    Closes https://gitlab.gnome.org/GNOME/evolution/issues/475

 src/modules/mail/e-mail-shell-backend.c | 42 ++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)
---
diff --git a/src/modules/mail/e-mail-shell-backend.c b/src/modules/mail/e-mail-shell-backend.c
index c1ab62edbc..75bf0c789c 100644
--- a/src/modules/mail/e-mail-shell-backend.c
+++ b/src/modules/mail/e-mail-shell-backend.c
@@ -734,6 +734,36 @@ network_monitor_gio_name_to_active_id (GBinding *binding,
        return TRUE;
 }
 
+static gchar *
+network_monitor_get_default_gio_name (void)
+{
+       GNetworkMonitor *default_monitor;
+       GIOExtensionPoint *pnt;
+       GList *extensions, *link;
+       GType default_type;
+
+       default_monitor = g_network_monitor_get_default ();
+
+       if (!default_monitor)
+               return NULL;
+
+       pnt = g_io_extension_point_lookup (G_NETWORK_MONITOR_EXTENSION_POINT_NAME);
+       if (!pnt)
+               return NULL;
+
+       default_type = G_OBJECT_TYPE (default_monitor);
+       extensions = g_io_extension_point_get_extensions (pnt);
+
+       for (link = extensions; link; link = g_list_next (link)) {
+               GIOExtension *ext = link->data;
+
+               if (default_type == g_io_extension_get_type (ext))
+                       return g_strdup (g_io_extension_get_name (ext));
+       }
+
+       return NULL;
+}
+
 static GtkWidget *
 mail_shell_backend_create_network_page (EPreferencesWindow *window)
 {
@@ -744,6 +774,7 @@ mail_shell_backend_create_network_page (EPreferencesWindow *window)
        PangoAttrList *bold;
        ENetworkMonitor *network_monitor;
        GSList *gio_names, *link;
+       gchar *default_gio_name, *default_caption = NULL;
 
        const gchar *known_gio_names[] = {
                /* Translators: One of the known implementation names of the GNetworkMonitor. Either translate
@@ -792,8 +823,17 @@ mail_shell_backend_create_network_page (EPreferencesWindow *window)
 
        gtk_label_set_mnemonic_widget (GTK_LABEL (label), widget);
 
+       default_gio_name = network_monitor_get_default_gio_name ();
+       if (default_gio_name && *default_gio_name) {
+               /* Translators: The '%s' is replaced with the actual name of the GNetworkMonitor 
implementation */
+               default_caption = g_strdup_printf (C_("NetworkMonitor", "Default (%s)"), g_dpgettext2 (NULL, 
"NetworkMonitor", default_gio_name));
+       }
+
        /* Always as the first */
-       gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (widget), "default", C_("NetworkMonitor", "Default"));
+       gtk_combo_box_text_append (GTK_COMBO_BOX_TEXT (widget), "default", default_caption ? default_caption 
: C_("NetworkMonitor", "Default"));
+
+       g_free (default_gio_name);
+       g_free (default_caption);
 
        network_monitor = E_NETWORK_MONITOR (e_network_monitor_get_default ());
        gio_names = e_network_monitor_list_gio_names (network_monitor);