lily/performer-group-performer.cc

   1 /*
   2   performer-group-performer.cc -- implement Performer_group_performer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7                Jan Nieuwenhuizen <janneke@gnu.org>
   8  */
   9
  10 #include "performer-group-performer.hh"
  11
  12 #include "context.hh"
  13 #include "audio-element.hh"
  14 #include "warn.hh"
  15
  16 ADD_TRANSLATOR (Performer_group_performer,
  17 /* descr */       "",
  18 /* creats*/       "",
  19 /* accepts */     "",
  20 /* acks  */      "",
  21 /* reads */       "",
  22 /* write */       "");
  23
  24
  25
  26 void
  27 Performer_group_performer::announce_element (Audio_element_info info)
  28 {
  29   announce_infos_.push (info);
  30   Translator *t
  31     = context ()->get_parent_context ()->implementation ();
  32
  33   if (Performer_group_performer * eg = dynamic_cast<Performer_group_performer*> (t))
  34     eg->announce_element (info);
  35 }
  36
  37 void
  38 Performer_group_performer::acknowledge_audio_elements ()
  39 {
  40   for (int j = 0; j < announce_infos_.size (); j++)
  41     {
  42       Audio_element_info info = announce_infos_[j];
  43
  44       for (SCM p = get_simple_trans_list (); scm_is_pair (p); p = scm_cdr (p))
  45         {
  46           Translator * t = unsmob_translator (scm_car (p));
  47           Performer * eng = dynamic_cast<Performer*> (t);
  48           if (eng && eng!= info.origin_trans_)
  49             eng->acknowledge_audio_element (info);
  50         }
  51     }
  52 }
  53
  54 void
  55 Performer_group_performer::do_announces ()
  56 {
  57   while (1)
  58     {
  59       create_audio_elements ();
  60       performer_each (get_simple_trans_list (),
  61                       &Performer::create_audio_elements);
  62
  63       if (!announce_infos_.size ())
  64         break ;
  65
  66       acknowledge_audio_elements ();
  67       announce_infos_.clear ();
  68     }
  69 }
  70
  71 Performer_group_performer::Performer_group_performer ()
  72 {
  73 }
  74
  75
  76 void
  77 performer_each (SCM list, Performer_method method)
  78 {
  79   for (SCM p = list; scm_is_pair (p); p = scm_cdr (p))
  80     {
  81       Performer * e = dynamic_cast<Performer*>(unsmob_translator (scm_car (p)));
  82       if (e)
  83         (e->*method) ();
  84     }
  85 }