lily/lyric-performer.cc

   1 /*
   2   lyric-performer.cc -- implement Lyric_performer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997--2009 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include "audio-item.hh"
  10 #include "performer.hh"
  11 #include "stream-event.hh"
  12 #include "translator.icc"
  13
  14 class Lyric_performer : public Performer
  15 {
  16 public:
  17   TRANSLATOR_DECLARATIONS (Lyric_performer);
  18 protected:
  19
  20   void stop_translation_timestep ();
  21   void process_music ();
  22   DECLARE_TRANSLATOR_LISTENER (lyric);
  23 private:
  24   vector<Stream_event *> events_;
  25   Audio_text *audio_;
  26 };
  27
  28 Lyric_performer::Lyric_performer ()
  29 {
  30   audio_ = 0;
  31 }
  32
  33 void
  34 Lyric_performer::process_music ()
  35 {
  36   // FIXME: won't work with fancy lyrics
  37   if (events_.size ()
  38       && scm_is_string (events_[0]->get_property ("text"))
  39       && ly_scm2string (events_[0]->get_property ("text")).length ())
  40     {
  41       audio_ = new Audio_text (Audio_text::LYRIC,
  42                                ly_scm2string (events_[0]->get_property ("text")));
  43       Audio_element_info info (audio_, events_[0]);
  44       announce_element (info);
  45     }
  46   events_.clear ();
  47 }
  48
  49 void
  50 Lyric_performer::stop_translation_timestep ()
  51 {
  52   if (audio_)
  53     {
  54       audio_ = 0;
  55     }
  56   events_.clear ();
  57 }
  58
  59 IMPLEMENT_TRANSLATOR_LISTENER (Lyric_performer, lyric);
  60 void
  61 Lyric_performer::listen_lyric (Stream_event *event)
  62 {
  63   events_.push_back (event);
  64 }
  65
  66 ADD_TRANSLATOR (Lyric_performer,
  67                 /* doc */
  68                 "",
  69
  70                 /* create */
  71                 "",
  72
  73                 /* read */
  74                 "",
  75
  76                 /* write */
  77                 ""
  78                 );