-
- Rod r;
- Spanner *sp = dynamic_cast<Spanner *> (me);
- r.item_drul_[LEFT] = sp->get_bound (LEFT);
- r.item_drul_[RIGHT] = sp->get_bound (RIGHT);
- r.distance_
- = robust_scm2double (me->get_property ("minimum-length"), 0);
-
- r.add_to_cols ();
+ SCM num_length = me->get_property ("minimum-length");
+ if (scm_is_number (num_length))
+ {
+ Rod r;
+ Spanner *sp = dynamic_cast<Spanner *> (me);
+ System *root = get_root_system (me);
+ Drul_array<Item*> bounds (sp->get_bound (LEFT),
+ sp->get_bound (RIGHT));
+ if (!bounds[LEFT] || !bounds[RIGHT])
+ return SCM_UNSPECIFIED;
+
+ vector<Item*> cols (root->broken_col_range (bounds[LEFT]->get_column (),
+ bounds[RIGHT]->get_column ()));
+
+ if (cols.size ())
+ {
+ Rod r ;
+ r.item_drul_[LEFT] = sp->get_bound (LEFT);
+ r.item_drul_[RIGHT] = cols[0]->find_prebroken_piece (LEFT);
+ r.distance_ = robust_scm2double (num_length, 0);
+ r.add_to_cols ();
+
+ r.item_drul_[LEFT] = cols.back ()->find_prebroken_piece (RIGHT);
+ r.item_drul_[RIGHT] = sp->get_bound (RIGHT);
+ r.add_to_cols ();
+ }
+
+ r.distance_ = robust_scm2double (num_length, 0);
+ r.item_drul_[LEFT] = sp->get_bound (LEFT);
+ r.item_drul_[RIGHT] = sp->get_bound (RIGHT);
+ r.add_to_cols ();
+ }
+