+void
+Text_spanner_engraver::acknowledge_note_column (Grob_info info)
+{
+ if (span_)
+ {
+ Pointer_group_interface::add_grob (span_,
+ ly_symbol2scm ("note-columns"),
+ info.grob ());
+ if (!span_->get_bound (LEFT))
+ add_bound_item (span_, info.grob ());
+ }
+ else if (finished_)
+ {
+ Pointer_group_interface::add_grob (finished_,
+ ly_symbol2scm ("note-columns"),
+ info.grob ());
+ if (!finished_->get_bound (RIGHT))
+ add_bound_item (finished_, info.grob ());
+ }
+}
+
+
+void
+Text_spanner_engraver::boot ()
+{
+ ADD_LISTENER (Text_spanner_engraver, text_span);
+ ADD_ACKNOWLEDGER (Text_spanner_engraver, note_column);
+}
+