lily/performer-group.cc

   1 /*
   2   performer-group-performer.cc -- implement Performer_group
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7   Jan Nieuwenhuizen <janneke@gnu.org>
   8 */
   9
  10 #include "performer-group.hh"
  11
  12 #include "context.hh"
  13 #include "audio-element.hh"
  14 #include "warn.hh"
  15
  16 ADD_TRANSLATOR_GROUP (Performer_group,
  17                       /* doc */
  18                       "",
  19
  20                       /* create */
  21                       "",
  22
  23                       /* read */
  24                       "",
  25
  26                       /* write */
  27                       ""
  28                       );
  29
  30 void
  31 Performer_group::announce_element (Audio_element_info info)
  32 {
  33   announce_infos_.push_back (info);
  34   Translator_group *t
  35     = context ()->get_parent_context ()->implementation ();
  36
  37   if (Performer_group *eg = dynamic_cast<Performer_group *> (t))
  38     eg->announce_element (info);
  39 }
  40
  41 void
  42 Performer_group::acknowledge_audio_elements ()
  43 {
  44   for (vsize j = 0; j < announce_infos_.size (); j++)
  45     {
  46       Audio_element_info info = announce_infos_[j];
  47
  48       for (SCM p = get_simple_trans_list (); scm_is_pair (p); p = scm_cdr (p))
  49         {
  50           Translator *t = unsmob_translator (scm_car (p));
  51           Performer *eng = dynamic_cast<Performer *> (t);
  52           if (eng && eng != info.origin_trans_)
  53             eng->acknowledge_audio_element (info);
  54         }
  55     }
  56 }
  57
  58 void
  59 performer_each (SCM list, Performer_method method)
  60 {
  61   for (SCM p = list; scm_is_pair (p); p = scm_cdr (p))
  62     {
  63       Performer *e = dynamic_cast<Performer *> (unsmob_translator (scm_car (p)));
  64       if (e)
  65         (e->*method) ();
  66     }
  67 }
  68
  69 void
  70 Performer_group::do_announces ()
  71 {
  72   for (SCM s = context ()->children_contexts ();
  73        scm_is_pair (s); s = scm_cdr (s))
  74     {
  75       Context *c = unsmob_context (scm_car (s));
  76       Performer_group *group
  77         = dynamic_cast<Performer_group *> (c->implementation ());
  78       if (group)
  79         group->do_announces ();
  80     }
  81
  82   while (1)
  83     {
  84       performer_each (get_simple_trans_list (),
  85                       &Performer::create_audio_elements);
  86
  87       if (!announce_infos_.size ())
  88         break;
  89
  90       acknowledge_audio_elements ();
  91       announce_infos_.clear ();
  92     }
  93 }