[gnome-builder] project-tree: insert dummy empty node if no children were found

[Christian Hergert <chergert src gnome org>]

commit 8df8ac43f044682e0faf7b4ff44359255d5071ea
Author: Christian Hergert <chergert redhat com>
Date:   Tue May 10 11:26:31 2016 +0300

    project-tree: insert dummy empty node if no children were found
    
    This more closely mimics what gedit does in the project tree.

 plugins/project-tree/gb-project-tree-builder.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/plugins/project-tree/gb-project-tree-builder.c b/plugins/project-tree/gb-project-tree-builder.c
index 0cf4513..fdf633a 100644
--- a/plugins/project-tree/gb-project-tree-builder.c
+++ b/plugins/project-tree/gb-project-tree-builder.c
@@ -123,6 +123,7 @@ build_file (GbProjectTreeBuilder *self,
   IdeVcs *vcs;
   GFile *file;
   IdeTree *tree;
+  gint count = 0;
   gboolean show_ignored_files;
 
   g_return_if_fail (GB_IS_PROJECT_TREE_BUILDER (self));
@@ -189,6 +190,24 @@ build_file (GbProjectTreeBuilder *self,
 
       if (g_file_info_get_file_type (item_file_info) == G_FILE_TYPE_DIRECTORY)
         ide_tree_node_set_children_possible (child, TRUE);
+
+      count++;
+    }
+
+  /*
+   * If we didn't add any children to this node, insert an empty node to
+   * notify the user that nothing was found.
+   */
+  if (count == 0)
+    {
+      IdeTreeNode *child;
+
+      child = g_object_new (IDE_TYPE_TREE_NODE,
+                            "icon-name", NULL,
+                            "text", _("Empty"),
+                            "use-dim-label", TRUE,
+                            NULL);
+      ide_tree_node_append (node, child);
     }
 }