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--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "paper-score.hh"
  10
  11 #include "all-font-metrics.hh"
  12 #include "gourlay-breaking.hh"
  13 #include "main.hh"
  14 #include "misc.hh"
  15 #include "output-def.hh"
  16 #include "paper-book.hh"
  17 #include "paper-column.hh"
  18 #include "scm-hash.hh"
  19 #include "score.hh"
  20 #include "stencil.hh"
  21 #include "system.hh"
  22 #include "warn.hh"
  23
  24 Paper_score::Paper_score ()
  25 {
  26   layout_ = 0;
  27   system_ = 0;
  28 }
  29
  30 Paper_score::Paper_score (Paper_score const &s)
  31   : Music_output (s)
  32 {
  33   assert (false);
  34 }
  35
  36 void
  37 Paper_score::typeset_line (System *system)
  38 {
  39   if (!system_)
  40     system_ = system;
  41
  42   systems_ = scm_cons (system->self_scm (), systems_);
  43   system->pscore_ = this;
  44
  45   scm_gc_unprotect_object (system->self_scm ());
  46 }
  47
  48 Array<Column_x_positions>
  49 Paper_score::calc_breaking ()
  50 {
  51   Break_algorithm *algorithm = 0;
  52   Array<Column_x_positions> sol;
  53
  54   algorithm = new Gourlay_breaking;
  55   algorithm->set_pscore (this);
  56   sol = algorithm->solve ();
  57   delete algorithm;
  58
  59   return sol;
  60 }
  61
  62 SCM
  63 Paper_score::process (String)
  64 {
  65   if (be_verbose_global)
  66     message (_f ("Element count %d (spanners %d) ",
  67                              system_->element_count (),
  68                              system_->spanner_count ()));
  69
  70   message (_ ("Preprocessing graphical objects...") + " ");
  71
  72   /* FIXME: Check out why we need this - removing gives assertion failures
  73      down the road.
  74
  75      doubly, also done in Score_engraver */
  76   Link_array<Grob> pc (system_->columns ());
  77   pc[0]->set_property ("breakable", SCM_BOOL_T);
  78   pc.top ()->set_property ("breakable", SCM_BOOL_T);
  79
  80   system_->pre_processing ();
  81
  82   Array<Column_x_positions> breaking = calc_breaking ();
  83   system_->break_into_pieces (breaking);
  84   SCM lines = system_->get_lines ();
  85
  86   /*
  87     retain Grobs, since they are pointed to by the point & click data
  88     structures, and are not marked fully, because child -> parent
  89     links aren't marked.
  90    */
  91   return lines;
  92 }