lily/paper-score.cc

   1 /*
   2   paper-score.cc -- implement Paper_score
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "paper-score.hh"
  10
  11 #include "all-font-metrics.hh"
  12 #include "book.hh"
  13 #include "international.hh"
  14 #include "main.hh"
  15 #include "misc.hh"
  16 #include "output-def.hh"
  17 #include "paper-book.hh"
  18 #include "paper-column.hh"
  19 #include "scm-hash.hh"
  20 #include "score.hh"
  21 #include "stencil.hh"
  22 #include "system.hh"
  23 #include "warn.hh"
  24 #include "constrained-breaking.hh"
  25
  26 Paper_score::Paper_score (Output_def *layout)
  27 {
  28   layout_ = layout;
  29   system_ = 0;
  30   systems_ = SCM_EOL;
  31   paper_systems_ = SCM_BOOL_F;
  32 }
  33
  34 Paper_score::Paper_score (Paper_score const &s)
  35   : Music_output (s)
  36 {
  37   assert (false);
  38 }
  39
  40 void
  41 Paper_score::derived_mark () const
  42 {
  43   if (layout_)
  44     scm_gc_mark (layout_->self_scm ());
  45   scm_gc_mark (systems_);
  46   scm_gc_mark (paper_systems_);
  47 }
  48
  49 void
  50 Paper_score::typeset_system (System *system)
  51 {
  52   if (!system_)
  53     system_ = system;
  54
  55   systems_ = scm_cons (system->self_scm (), systems_);
  56   system->pscore_ = this;
  57   system->layout_ = layout_;
  58   system->unprotect ();
  59 }
  60
  61
  62 vector<vsize>
  63 Paper_score::find_break_indices () const
  64 {
  65   vector<Grob*> all = root_system ()->used_columns ();
  66   vector<vsize> retval;
  67
  68   for (vsize i = 0; i < all.size (); i++)
  69     {
  70       Item *it = dynamic_cast<Item*> (all[i]);
  71       if (Paper_column::is_breakable (all[i])
  72           && (i == 0 || it->find_prebroken_piece (LEFT))
  73           && (i == all.size () - 1 || it->find_prebroken_piece (RIGHT)))
  74         retval.push_back (i);
  75     }
  76
  77   cols_ = all;
  78   break_indices_ = retval;
  79
  80   return retval;
  81 }
  82
  83 vector<vsize>
  84 Paper_score::get_break_indices () const
  85 {
  86   if (break_indices_.empty ())
  87     find_break_indices ();
  88   return break_indices_;
  89 }
  90
  91 vector<Grob*>
  92 Paper_score::get_columns () const
  93 {
  94   if (cols_.empty ())
  95     find_break_indices ();
  96   return cols_;
  97 }
  98
  99 vector<Column_x_positions>
 100 Paper_score::calc_breaking ()
 101 {
 102   Constrained_breaking algorithm (this);
 103   vector<Column_x_positions> sol;
 104
 105   message (_ ("Calculating line breaks...") + " ");
 106
 107   int system_count = robust_scm2int (layout ()->c_variable ("system-count"), 0);
 108   if (system_count)
 109     return algorithm.solve (0, VPOS, system_count);
 110
 111   return algorithm.best_solution (0, VPOS);
 112 }
 113
 114 void
 115 Paper_score::process ()
 116 {
 117   if (be_verbose_global)
 118     message (_f ("Element count %d (spanners %d) ",
 119                  system_->element_count (),
 120                  system_->spanner_count ()));
 121
 122   message (_ ("Preprocessing graphical objects..."));
 123
 124   system_->pre_processing ();
 125 }
 126
 127 System *
 128 Paper_score::root_system () const
 129 {
 130   return system_;
 131 }
 132
 133 Output_def *
 134 Paper_score::layout () const
 135 {
 136   return layout_;
 137 }
 138
 139 SCM
 140 Paper_score::get_paper_systems ()
 141 {
 142   if (paper_systems_ == SCM_BOOL_F)
 143     {
 144       vector<Column_x_positions> breaking = calc_breaking ();
 145       system_->break_into_pieces (breaking);
 146       message (_ ("Drawing systems...") + " ");
 147       system_->do_break_substitution_and_fixup_refpoints ();
 148       paper_systems_ = system_->get_paper_systems ();
 149     }
 150   return paper_systems_;
 151 }
 152
 153
 154 Paper_score *
 155 unsmob_paper_score (SCM x)
 156 {
 157   return dynamic_cast<Paper_score*> (unsmob_music_output (x));
 158 }