[gtk+] places-view: monitor network

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

commit 767927aef309761754ce9da8062e20521761b6e0
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Mon Apr 10 18:59:33 2017 -0300

    places-view: monitor network
    
    GtkPlacesView exposes local access points and network
    shares transparently by using the 'network:///' URI,
    which is handled by GIO.
    
    Currently, however, it doesn't monitor the network
    for new available points, such as computers that just
    join the network. It may happen too that the backend
    won't find all the networks before the network enumeration
    finishes.
    
    Fix that by keeping a file monitor inspecting the network
    uri, and update the places list when that happens.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781162

 gtk/gtkplacesview.c |   38 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 38 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkplacesview.c b/gtk/gtkplacesview.c
index 7d4a6dd..12b5568 100644
--- a/gtk/gtkplacesview.c
+++ b/gtk/gtkplacesview.c
@@ -56,6 +56,7 @@ struct _GtkPlacesViewPrivate
 
   GFile                         *server_list_file;
   GFileMonitor                  *server_list_monitor;
+  GFileMonitor                  *network_monitor;
 
   GCancellable                  *cancellable;
 
@@ -397,6 +398,7 @@ gtk_places_view_destroy (GtkWidget *widget)
   priv->destroyed = 1;
 
   g_signal_handlers_disconnect_by_func (priv->volume_monitor, update_places, widget);
+  g_signal_handlers_disconnect_by_func (priv->network_monitor, update_places, widget);
 
   g_cancellable_cancel (priv->cancellable);
   g_cancellable_cancel (priv->networks_fetching_cancellable);
@@ -417,6 +419,7 @@ gtk_places_view_finalize (GObject *object)
   g_clear_object (&priv->server_list_file);
   g_clear_object (&priv->server_list_monitor);
   g_clear_object (&priv->volume_monitor);
+  g_clear_object (&priv->network_monitor);
   g_clear_object (&priv->cancellable);
   g_clear_object (&priv->networks_fetching_cancellable);
   g_clear_object (&priv->path_size_group);
@@ -899,6 +902,40 @@ update_network_state (GtkPlacesView *view)
 }
 
 static void
+monitor_network (GtkPlacesView *self)
+{
+  GtkPlacesViewPrivate *priv;
+  GFile *network_file;
+  GError *error;
+
+  priv = gtk_places_view_get_instance_private (self);
+
+  if (priv->network_monitor)
+    return;
+
+  error = NULL;
+  network_file = g_file_new_for_uri ("network:///");
+  priv->network_monitor = g_file_monitor (network_file,
+                                          G_FILE_MONITOR_NONE,
+                                          NULL,
+                                          &error);
+
+  g_clear_object (&network_file);
+
+  if (error)
+    {
+      g_warning ("Error monitoring network: %s", error->message);
+      g_clear_error (&error);
+      return;
+    }
+
+  g_signal_connect_swapped (priv->network_monitor,
+                            "changed",
+                            G_CALLBACK (update_places),
+                            self);
+}
+
+static void
 populate_networks (GtkPlacesView   *view,
                    GFileEnumerator *enumerator,
                    GList           *detected_networks)
@@ -971,6 +1008,7 @@ network_enumeration_next_files_finished (GObject      *source_object,
   if (!priv->destroyed)
     {
       update_network_state (view);
+      monitor_network (view);
       update_loading (view);
     }
 }