+ else
+ {
+ Link_array<Item> break_points = pscore_l_->line_l_->broken_col_range (left,right);
+
+ break_points.insert (left,0);
+ break_points.push (right);
+
+ for (int i=1; i < break_points.size(); i++)
+ {
+ Drul_array<Item*> bounds;
+ bounds[LEFT] = break_points[i-1];
+ bounds[RIGHT] = break_points[i];
+ Direction d = LEFT;
+ do
+ {
+ if (!bounds[d]->line_l())
+ bounds[d] = bounds[d]->find_prebroken_piece(- d);
+ }
+ while ((flip(&d))!= LEFT);
+
+ if (!bounds[LEFT] || ! bounds[RIGHT])
+ {
+ programming_error ("bounds of this piece aren't breakable. ");
+ continue;
+ }
+
+ Spanner *span_p = dynamic_cast<Spanner*>(clone ());
+ span_p->set_bound(LEFT,bounds[LEFT]);
+ span_p->set_bound(RIGHT,bounds[RIGHT]);
+
+
+ assert (bounds[LEFT]->line_l () ==
+ bounds[RIGHT]->line_l ());
+
+ bounds[LEFT]->line_l ()->typeset_element (span_p);
+ broken_into_l_arr_.push (span_p);
+ }
+ }
+ broken_into_l_arr_.sort (Spanner::compare);