Index: operation.h
===================================================================
--- operation.h	(revision 28794)
+++ operation.h	(revision 28795)
@@ -135,6 +135,9 @@
 
 /* pointer to low-level operation (copy, move and rotate) functions */
 typedef struct {
+	void *(*common_pre)(pcb_opctx_t *ctx, pcb_any_obj_t *ptr2, void *ptr3);  /* called before anything else (not object-type-dependent) */
+	void *(*common_post)(pcb_opctx_t *ctx, pcb_any_obj_t *ptr2, void *ptr3); /* called after everything else (not object-type-dependent) */
+
 	void *(*Line)(pcb_opctx_t *ctx, pcb_layer_t *, pcb_line_t *);
 	void *(*Text)(pcb_opctx_t *ctx, pcb_layer_t *, pcb_text_t *);
 	void *(*Polygon)(pcb_opctx_t *ctx, pcb_layer_t *, pcb_poly_t *);