Use tre-view toplevel path of the cursor, if available, in order to

prevent jumping (Bug #16024)

thunar/thunar-tree-view.c

@@ -2866,8 +2866,8 @@ thunar_tree_view_set_show_hidden (ThunarTreeView *view,
  *
  * Searches for the best-matching toplevel path in the
  * following order:
- *   1) any mounted device or network resource
- *   2) the user's desktop directory
+ *   1) the currently active one
+ *   2) any mounted device or network resource
  *   3) the user's home directory
  *   4) the root filesystem
  *
@@ -2893,6 +2893,35 @@ thunar_tree_view_get_preferred_toplevel_path (ThunarTreeView *view,
   if (!gtk_tree_model_get_iter_first (model, &iter))
     return NULL;
 
+  /* get active toplevel path and check if we can use it */
+  gtk_tree_view_get_cursor (GTK_TREE_VIEW (view), &path, NULL);
+  if (path != NULL)
+    {
+      if (gtk_tree_path_get_depth (path) != 1)
+        while (gtk_tree_path_get_depth (path) > 1)
+          gtk_tree_path_up (path);
+
+      if (gtk_tree_model_get_iter (GTK_TREE_MODEL (view->model), &iter, path))
+        {
+          /* lookup file for the toplevel item */
+          gtk_tree_model_get (GTK_TREE_MODEL (view->model), &iter, THUNAR_TREE_MODEL_COLUMN_FILE, &toplevel_file, -1);
+          if (toplevel_file)
+            {
+              /* check if the toplevel file is an ancestor */
+              if (thunar_file_is_ancestor (file, toplevel_file))
+                {
+                  g_object_unref (toplevel_file);
+                  return path;
+                }
+
+              g_object_unref (toplevel_file);
+            }
+        }
+
+      gtk_tree_path_free (path);
+      path = NULL;
+    }
+
   /* get GFiles for special toplevel items */
   desktop = thunar_g_file_new_for_desktop ();
   home = thunar_g_file_new_for_home ();