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--2003 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include "event.hh"
  10 #include "audio-item.hh"
  11 #include "lily-proto.hh"
  12 #include "performer.hh"
  13 #include "array.hh"
  14
  15 class Lyric_performer : public Performer {
  16 public:
  17   TRANSLATOR_DECLARATIONS(Lyric_performer);
  18 protected:
  19
  20   virtual bool try_music (Music* req);
  21   virtual void stop_translation_timestep ();
  22   virtual void create_audio_elements ();
  23
  24 private:
  25   Link_array<Music> lreqs_;
  26   Audio_text* audio_;
  27 };
  28
  29
  30
  31
  32 Lyric_performer::Lyric_performer ()
  33 {
  34   audio_ = 0;
  35 }
  36
  37
  38 void
  39 Lyric_performer::create_audio_elements ()
  40 {
  41   // FIXME: won't work with fancy lyrics
  42   if (lreqs_.size ()
  43       && gh_string_p (lreqs_[0]->get_mus_property ("text"))
  44       && ly_scm2string (lreqs_[0]->get_mus_property ("text")).length ())
  45     {
  46       audio_ = new Audio_text (Audio_text::LYRIC,
  47                                  ly_scm2string (lreqs_[0]->get_mus_property ("text")));
  48       Audio_element_info info (audio_, lreqs_[0]);
  49       announce_element (info);
  50     }
  51   lreqs_.clear ();
  52 }
  53
  54 void
  55 Lyric_performer::stop_translation_timestep ()
  56 {
  57   if (audio_)
  58     {
  59       play_element (audio_);
  60       audio_ = 0;
  61     }
  62   lreqs_.clear ();
  63 }
  64
  65 bool
  66 Lyric_performer::try_music (Music* req)
  67 {
  68   if (req->is_mus_type ("lyric-event"))
  69     {
  70       lreqs_.push (req);
  71       return true;
  72     }
  73   return false;
  74 }
  75
  76 ENTER_DESCRIPTION(Lyric_performer,"","","lyric-event","","","");