+ Interval w = width (me);
+
+ Item *item = dynamic_cast<Item*> (me);
+ Paper_column * pc = item->column_l ();
+
+
+ for (SCM s = me->get_grob_property ("conditional-elements"); gh_pair_p (s); s = ly_cdr (s))
+ {
+ SCM elt = ly_car (s);
+ if (!unsmob_grob (elt))
+ continue;
+
+ Item *il = unsmob_item (elt);
+ if (pc != il->column_l ())
+ {
+ /* this shouldn't happen, but let's continue anyway. */
+ programming_error (_ ("Separation_item: I've been drinking too much"));
+ continue; /*UGH UGH*/
+ }
+
+ if (to_boolean (il->get_grob_property ("no-spacing-rods")))
+ {
+ continue;
+ }
+
+ if (Accidental_placement::has_interface (il))
+ {
+ w.unite (Accidental_placement::get_relevant_accidental_extent (il, pc, left));
+ }
+ }
+
+ SCM pad = me->get_grob_property ("padding");
+
+ if (gh_number_p (pad))
+ {
+ w[RIGHT] += gh_scm2double (pad)/2;
+ w[LEFT] -= gh_scm2double (pad)/2;
+ }
+ return w;
+}
+
+Interval
+Separation_item::width (Grob *me)
+{
+ SCM sw = me->get_grob_property ("extent-X");
+ if (ly_number_pair_p (sw))
+ {
+ return ly_scm2interval (sw);
+ }
+