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 void
  25 Performer_group_performer::announce_element (Audio_element_info info)
  26 {
  27   announce_infos_.push (info);
  28   Translator *t
  29     = context ()->get_parent_context ()->implementation ();
  30
  31   if (Performer_group_performer *eg = dynamic_cast<Performer_group_performer *> (t))
  32     eg->announce_element (info);
  33 }
  34
  35 void
  36 Performer_group_performer::acknowledge_audio_elements ()
  37 {
  38   for (int j = 0; j < announce_infos_.size (); j++)
  39     {
  40       Audio_element_info info = announce_infos_[j];
  41
  42       for (SCM p = get_simple_trans_list (); scm_is_pair (p); p = scm_cdr (p))
  43         {
  44           Translator *t = unsmob_translator (scm_car (p));
  45           Performer *eng = dynamic_cast<Performer *> (t);
  46           if (eng && eng!= info.origin_trans_)
  47             eng->acknowledge_audio_element (info);
  48         }
  49     }
  50 }
  51
  52 void
  53 Performer_group_performer::do_announces ()
  54 {
  55   while (1)
  56     {
  57       create_audio_elements ();
  58       performer_each (get_simple_trans_list (),
  59                       &Performer::create_audio_elements);
  60
  61       if (!announce_infos_.size ())
  62         break;
  63
  64       acknowledge_audio_elements ();
  65       announce_infos_.clear ();
  66     }
  67 }
  68
  69 Performer_group_performer::Performer_group_performer ()
  70 {
  71 }
  72
  73 void
  74 performer_each (SCM list, Performer_method method)
  75 {
  76   for (SCM p = list; scm_is_pair (p); p = scm_cdr (p))
  77     {
  78       Performer *e = dynamic_cast<Performer *> (unsmob_translator (scm_car (p)));
  79       if (e)
  80         (e->*method) ();
  81     }
  82 }