+ return true;
+}
+
+bool
+Hara_kiri_group_spanner::request_suicide_alone (Grob *me, int start, int end)
+{
+ if (!to_boolean (me->get_property ("remove-empty")))
+ return false;
+
+ bool remove_first = to_boolean (me->get_property ("remove-first"));
+ if (!remove_first && start <= 0)
+ return false;
+
+ SCM important = me->get_property ("important-column-ranks");
+ if (scm_is_vector (important))
+ {
+ int len = scm_c_vector_length (important);
+ if (find_in_range (important, 0, len, start, end))
+ return false;
+ }
+ else /* build the important-columns-cache */
+ {
+ extract_grob_set (me, "items-worth-living", worth);
+ vector<int> ranks;
+
+ for (vsize i = 0; i < worth.size (); i++)
+ {
+ Interval_t<int> iv = worth[i]->spanned_rank_interval ();
+ for (int j = iv[LEFT]; j <= iv[RIGHT]; j++)
+ ranks.push_back (j);
+ }
+ vector_sort (ranks, less<int> ());
+ uniq (ranks);
+
+ SCM scm_vec = scm_c_make_vector (ranks.size (), SCM_EOL);
+ for (vsize i = 0; i < ranks.size (); i++)
+ scm_vector_set_x (scm_vec, scm_from_int (i), scm_from_int (ranks[i]));
+ me->set_property ("important-column-ranks", scm_vec);
+
+ return request_suicide (me, start, end);
+ }
+
+ return true;
+}
+
+void
+Hara_kiri_group_spanner::consider_suicide (Grob *me)
+{
+ Spanner *sp = dynamic_cast<Spanner *> (me);
+ int left = 0;
+ int right = INT_MAX;
+ if (Item *l = sp->get_bound (LEFT))
+ left = l->get_column ()->get_rank ();
+ if (Item *r = sp->get_bound (RIGHT))
+ right = r->get_column ()->get_rank ();
+ if (!request_suicide (me, left, right))
+ return;
+
+ vector<Grob *> childs;
+ Axis_group_interface::get_children (me, &childs);
+ for (vsize i = 0; i < childs.size (); i++)
+ childs[i]->suicide ();