2 spanner.cc -- implement Spanner
4 source file of the GNU LilyPond music typesetter
6 (c) 1996, 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 #include "dimension-cache.hh"
11 #include "paper-column.hh"
12 #include "paper-score.hh"
13 #include "molecule.hh"
14 #include "paper-outputter.hh"
17 Spanner::do_print() const
20 DOUT << "Between " << classname (spanned_drul_[LEFT])
21 << " and " << classname (spanned_drul_[RIGHT]) << '\n';
24 DOUT << "Broken in " << to_str (broken_into_l_arr_.size ()) << " pieces";
29 Spanner::break_into_pieces ()
34 Item * left = spanned_drul_[LEFT];
35 Item * right = spanned_drul_[RIGHT];
39 warning (_ ("left spanpoint is right spanpoint\n"));
43 Link_array<Item> break_points = pscore_l_->broken_col_range (left,right);
45 break_points.insert (left,0);
46 break_points.push (right);
48 for (int i=1; i < break_points.size(); i++)
50 Breaking_information info;
51 info.bounds_[LEFT] = break_points[i-1];
52 info.bounds_[RIGHT] = break_points[i];
56 Item *&pc_l = info.bounds_[d] ;
58 pc_l = pc_l->find_prebroken_piece(- d);
62 info.line_l_ = pc_l-> line_l ();
64 assert( info.line_l_ = pc_l->line_l ());
67 while ((flip(&d))!= LEFT);
69 Spanner *span_p = dynamic_cast<Spanner*>(clone ());
70 span_p->set_bounds(LEFT,info.bounds_[LEFT]);
71 span_p->set_bounds(RIGHT,info.bounds_[RIGHT]);
72 pscore_l_->typeset_element (span_p);
74 info.broken_spanner_l_ = span_p;
75 span_p->handle_broken_dependencies();
77 broken_into_l_arr_.push (span_p);
82 Spanner::set_my_columns()
84 Direction i = (Direction)1;
87 if (!spanned_drul_[i]->line_l())
88 set_bounds(i,spanned_drul_[i]->find_prebroken_piece((Direction)-i));
90 while (flip(&i) != 1);
94 Spanner::set_bounds(Direction d, Item*i)
104 set_parent ( i, X_AXIS);
107 if (spanned_drul_[Direction(-d)] == spanned_drul_[d]
109 warning (_f ("Spanner `%s\' with equal left and right spanpoints", classname (this)));
113 Spanner::do_break_processing()
116 break_into_pieces ();
118 handle_broken_dependencies();
123 spanned_drul_[LEFT]=0;
124 spanned_drul_[RIGHT]=0;
127 Spanner::Spanner (Spanner const &s)
130 spanned_drul_[LEFT] = spanned_drul_[RIGHT] =0;
135 Spanner::do_width() const
137 Real l = spanned_drul_[LEFT]->relative_coordinate (0, X_AXIS);
138 Real r = spanned_drul_[RIGHT]->relative_coordinate (0, X_AXIS);
141 warning ("Spanner with negative length");
143 return Interval (0, r-l);
147 Spanner::line_l() const
149 if (!spanned_drul_[LEFT] || !spanned_drul_[RIGHT])
151 if (spanned_drul_[LEFT]->line_l() != spanned_drul_[RIGHT]->line_l())
153 return spanned_drul_[LEFT]->line_l();
158 Spanner::find_broken_piece (Line_of_score*l) const
160 for (int i=0; i < broken_into_l_arr_.size (); i++)
162 if (broken_into_l_arr_[i]->line_l () == l)
163 return broken_into_l_arr_[i];
170 Spanner::broken_b() const
172 return broken_into_l_arr_.size();
176 Spanner::get_rods () const
183 Spanner::get_springs () const
190 Spanner::do_space_processing ()
192 Array<Rod> rs (get_rods ());
193 for (int i=0; i < rs.size (); i++)
195 rs[i].add_to_cols ();
198 Array<Spring> ss (get_springs ());
199 for (int i=0; i < ss.size (); i++)
201 ss[i].add_to_cols ();
209 Spanner::handle_broken_dependents ()
211 Spanner *unbrok = dynamic_cast<Spanner*> (original_l_);
212 if (!unbrok || parent_l(Y_AXIS))
215 Spanner *refpoint = dynamic_cast<Spanner*> (unbrok->parent_l (Y_AXIS));
219 Spanner * broken_refpoint = refpoint->find_broken_piece (line_l ());
221 set_parent ( broken_refpoint,Y_AXIS);
223 programming_error ("Spanner y -refpoint lost.");