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--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "paper-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 #include "group-interface.hh"
  20
  21
  22 Array<int>
  23 Break_algorithm::find_break_indices () const
  24 {
  25   Link_array<Grob> all = pscore_l_->line_l_->column_l_arr ();
  26   Array<int> retval;
  27
  28   for (int i=0; i < all.size (); i++)
  29     if (Item::breakable_b (all[i]))
  30       retval.push (i);
  31
  32   if (linewidth_f_ <=0)
  33     while (retval.size () >2)
  34       retval.del (1);
  35
  36   return retval;
  37 }
  38
  39
  40 Link_array<Grob>
  41 Break_algorithm::find_breaks () const
  42 {
  43   Link_array<Grob> all = pscore_l_->line_l_->column_l_arr ();
  44   Link_array<Grob> retval;
  45
  46   for (int i=0; i < all.size (); i++)
  47     if (Item::breakable_b (all[i]))
  48       retval.push (all[i]);
  49
  50   if (linewidth_f_ <=0)
  51     while (retval.size () >2)
  52       retval.del (1);
  53
  54   return retval;
  55 }
  56
  57
  58 Simple_spacer*
  59 Break_algorithm::generate_spacing_problem (Link_array<Grob> curline, Interval line) const
  60 {
  61   Simple_spacer * sp =  new Simple_spacer;
  62
  63   /*
  64     this is hardcoded, but this shouldn't happen anyway.
  65     used to be g et_var ("loose_column_distance");
  66    */
  67   sp->default_space_f_ = 1.0;
  68
  69
  70   sp->indent_f_ = line[LEFT];
  71
  72   /*
  73     sort out how interfacing this should work;
  74    */
  75   if (line.empty_b())
  76     {
  77      sp->line_len_f_ = -1;
  78     }
  79   else
  80     sp->line_len_f_ = line.length ();
  81
  82   sp->add_columns (curline);
  83
  84
  85   return sp;
  86 }
  87
  88 Break_algorithm::Break_algorithm ()
  89 {
  90   pscore_l_ = 0;
  91   linewidth_f_ = 0;
  92 }
  93
  94 void
  95 Break_algorithm::set_pscore (Paper_score*s)
  96 {
  97   pscore_l_ = s;
  98   linewidth_f_ = s->paper_l_->get_var("linewidth");
  99 }
 100
 101 Array<Column_x_positions>
 102 Break_algorithm::solve () const
 103 {
 104   Array<Column_x_positions> h= do_solve ();
 105
 106   return h;
 107 }
 108