lily/break-algorithm.cc

   1 /*
   2   break.cc -- implement Break_algorithm
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996,  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "score-column.hh"
  10 #include "break-algorithm.hh"
  11 #include "paper-def.hh"
  12 #include "debug.hh"
  13 #include "line-of-score.hh"
  14 #include "paper-score.hh"
  15 #include "paper-column.hh"
  16 #include "cpu-timer.hh"
  17 #include "command-request.hh"
  18 #include "simple-spacer.hh"
  19
  20
  21
  22
  23
  24 Array<int>
  25 Break_algorithm::find_break_indices () const
  26 {
  27   Line_of_cols all (pscore_l_->col_l_arr_);
  28   Array<int> retval;
  29
  30   for (int i=0; i < all.size (); i++)
  31     if (all[i]->breakable_b ())
  32       retval.push (i);
  33
  34   if (linewidth_f_ <=0)
  35     while (retval.size () >2)
  36       retval.del (1);
  37
  38   return retval;
  39 }
  40
  41
  42 Line_of_cols
  43 Break_algorithm::find_breaks () const
  44 {
  45   Line_of_cols all (pscore_l_->col_l_arr_);
  46   Line_of_cols retval;
  47
  48   for (int i=0; i < all.size (); i++)
  49     if (all[i]->breakable_b ())
  50       retval.push (all[i]);
  51
  52   if (linewidth_f_ <=0)
  53     while (retval.size () >2)
  54       retval.del (1);
  55
  56   return retval;
  57 }
  58
  59
  60 Simple_spacer*
  61 Break_algorithm::generate_spacing_problem (Line_of_cols curline, Interval line) const
  62 {
  63   Simple_spacer * sp =  new Simple_spacer;
  64   Paper_def * d = pscore_l_->paper_l_;
  65   sp->compression_energy_factor_f_ = d->get_var ("compression_energy_factor");
  66   sp->default_space_f_ = d->get_var ("loose_column_distance");
  67
  68   sp->indent_f_ = line[LEFT];
  69
  70   /*
  71     sort out how interfacing this should work;
  72    */
  73   if (line.empty_b())
  74     {
  75      sp->line_len_f_ = -1;
  76     }
  77   else
  78     sp->line_len_f_ = line.length ();
  79
  80   sp->add_columns (curline);
  81
  82
  83   return sp;
  84 }
  85
  86 Break_algorithm::Break_algorithm ()
  87 {
  88   pscore_l_ = 0;
  89   linewidth_f_ = 0;
  90 }
  91
  92 void
  93 Break_algorithm::set_pscore (Paper_score*s)
  94 {
  95   pscore_l_ = s;
  96   linewidth_f_ = s->paper_l_->get_var("linewidth");
  97   do_set_pscore ();
  98 }
  99
 100
 101
 102 void
 103 Break_algorithm::problem_OK () const
 104 {
 105   if (pscore_l_->col_l_arr_.empty ())
 106     error (_("Score does not have any columns"));
 107   OK ();
 108 }
 109
 110 void
 111 Break_algorithm::OK () const
 112 {
 113 }
 114
 115 Array<Column_x_positions>
 116 Break_algorithm::solve () const
 117 {
 118   Array<Column_x_positions> h= do_solve ();
 119
 120   return h;
 121 }
 122
 123 void
 124 Break_algorithm::do_set_pscore ()
 125 {
 126
 127 }