Move some tree item functions to tree.[ch]

Also rename some functions slightly:
      __find_shadow -> tree_item_find_shadow()
      __contained_by -> tree_item_contained_by()
      ring_of -> tree_item_container_items();

1 files changed, 5 insertions, 0 deletions

diff --git a/server/tree.h b/server/tree.h
index 01d4ff9e..8b9c6baa 100644
--- a/server/tree.h
+++ b/server/tree.h
@@ -80,6 +80,11 @@ static inline int is_opaque_item(TreeItem *item)
 }
 
 void       tree_item_dump                           (TreeItem *item);
+Shadow*    tree_item_find_shadow                    (TreeItem *item);
+int        tree_item_contained_by                   (TreeItem *item, Ring *ring);
+Ring*      tree_item_container_items                (TreeItem *item, Ring *ring);
+
+void       draw_item_remove_shadow                  (DrawItem *item);
 Shadow*    shadow_new                               (DrawItem *item, const SpicePoint *delta);
 Container* container_new                            (DrawItem *item);
 void       container_free                           (Container *container);