Index: obj_subc_parent.h
===================================================================
--- obj_subc_parent.h	(revision 14698)
+++ obj_subc_parent.h	(revision 14699)
@@ -99,5 +99,22 @@
 	return 0;
 }
 
+PCB_INLINE pcb_bool_t pcb_obj_is_under(pcb_any_obj_t *obj, pcb_data_t *data)
+{
+	for(;;) {
+		switch(obj->parent_type) {
+			case PCB_PARENT_ELEMENT: return pcb_false; /* remove this */
+			case PCB_PARENT_INVALID: return pcb_false;
+			case PCB_PARENT_BOARD:   return pcb_false;
+			case PCB_PARENT_LAYER:   if (obj->parent.layer->parent == data) return pcb_true; break;
+			case PCB_PARENT_SUBC:    if (obj->parent.subc->data == data) return pcb_true; break;
+			case PCB_PARENT_DATA:    if (obj->parent.data == data) return pcb_true; break;
+		}
+		obj = (pcb_any_obj_t *)pcb_obj_parent_subc(obj);
+		if (obj == NULL)
+			return pcb_false;
+	}
+}
 
+
 #endif