lily/global-translator.cc

   1 /*
   2   global-translator.cc -- implement Global_translator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "debug.hh"
  10 #include "music.hh"
  11 #include "request.hh"
  12 #include "music-list.hh"
  13 #include "music-iterator.hh"
  14 #include "global-translator.hh"
  15
  16 Global_translator::Global_translator ()
  17 {
  18 }
  19
  20 void
  21 Global_translator::add_moment_to_process (Moment m)
  22 {
  23   if (m  > final_mom_)
  24     return;
  25
  26   if (m < now_mom_ )
  27     programming_error ("Trying to freeze in time.");
  28
  29   for (int i=0; i <  extra_mom_pq_.size(); i++)
  30     if (extra_mom_pq_[i] == m)
  31       return;
  32   extra_mom_pq_.insert (m);
  33 }
  34
  35 Moment
  36 Global_translator::sneaky_insert_extra_moment (Moment w)
  37 {
  38   while (extra_mom_pq_.size() && extra_mom_pq_.front() <= w)
  39     w = extra_mom_pq_.get();
  40   return w;
  41 }
  42
  43 int
  44 Global_translator::moments_left_i() const
  45 {
  46   return extra_mom_pq_.size();
  47 }
  48
  49 void
  50 Global_translator::prepare (Moment m)
  51 {
  52   prev_mom_  = now_mom_;
  53   now_mom_ = m;
  54 }
  55
  56 Moment
  57 Global_translator::now_mom () const
  58 {
  59   return now_mom_;
  60 }
  61
  62
  63
  64 Music_output*
  65 Global_translator::get_output_p()
  66 {
  67   return 0;
  68 }
  69
  70 void
  71 Global_translator::one_time_step ()
  72 {
  73 }
  74 void
  75 Global_translator::start ()
  76 {
  77 }
  78 void
  79 Global_translator::finish ()
  80 {
  81 }
  82
  83 void
  84 Global_translator::run_iterator_on_me (Music_iterator * iter)
  85 {
  86   while (iter->ok () || moments_left_i ())
  87     {
  88       Moment w;
  89       w.set_infinite (1);
  90       if (iter->ok ())
  91         {
  92           w = iter->pending_moment();
  93
  94         }
  95
  96       w = sneaky_insert_extra_moment (w);
  97       prepare (w);
  98       iter->process (w);
  99
 100       one_time_step ();
 101     }
 102 }