lily/new-lyric-combine-music-iterator.cc

   1 /*
   2 new-lyric-combine-iterator.cc --  implement New_lyric_combine_music_iterator
   3
   4 source file of the GNU LilyPond music typesetter
   5
   6 (c) 2004 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7
   8  */
   9
  10 #include "translator-group.hh"
  11 #include "lyric-combine-music.hh"
  12 #include "event.hh"
  13 #include "grob.hh"
  14 #include "music-iterator.hh"
  15
  16
  17 class New_lyric_combine_music_iterator : public Music_iterator
  18 {
  19 public:
  20   VIRTUAL_COPY_CONS (Music_iterator);
  21   New_lyric_combine_music_iterator ();
  22   New_lyric_combine_music_iterator (New_lyric_combine_music_iterator const&src);
  23   DECLARE_SCHEME_CALLBACK(constructor, ());
  24 protected:
  25   virtual void construct_children ();
  26   virtual Moment pending_moment () const;
  27   virtual void do_quit();
  28   virtual void process (Moment);
  29   virtual Music_iterator *try_music_in_children (Music *) const;
  30   virtual bool run_always ()const;
  31   virtual bool ok () const;
  32   virtual void derived_mark () const;
  33   virtual void derived_substitute (Translator_group*,Translator_group*);
  34 private:
  35   bool start_new_syllable () ;
  36   void find_thread ();
  37
  38   Translator_group * lyrics_context_;
  39   Translator_group* music_context_;
  40   Music_iterator * lyric_iter_;
  41 };
  42
  43 /*
  44   Ugh, why static?
  45  */
  46 static Music *busy_ev;
  47 static Music *start_ev;
  48 static Music *melisma_playing_ev;
  49
  50 New_lyric_combine_music_iterator::New_lyric_combine_music_iterator ()
  51 {
  52   lyric_iter_ =0;
  53   music_context_ =0;
  54   lyrics_context_ = 0;
  55   if (!busy_ev)
  56     {
  57       busy_ev
  58         = make_music_by_name (ly_symbol2scm ("BusyPlayingEvent"));
  59       start_ev
  60         = make_music_by_name (ly_symbol2scm ("StartPlayingEvent"));
  61       melisma_playing_ev
  62         = make_music_by_name (ly_symbol2scm ("MelismaPlayingEvent"));
  63     }
  64 }
  65
  66 bool
  67 New_lyric_combine_music_iterator::start_new_syllable ()
  68 {
  69   bool b = music_context_->try_music (busy_ev);
  70
  71   if (!b)
  72     return false;
  73
  74   if (!lyrics_context_)
  75     construct_children ();
  76
  77   if (!to_boolean (lyrics_context_->get_property ("ignoreMelismata")))
  78     {
  79       bool m = music_context_->try_music (melisma_playing_ev);
  80       if (m)
  81         return false;
  82     }
  83
  84   return true;
  85 }
  86
  87 Moment
  88 New_lyric_combine_music_iterator::pending_moment () const
  89 {
  90   Moment m;
  91
  92   m.set_infinite (1);
  93
  94   return m;
  95 }
  96
  97 bool
  98 New_lyric_combine_music_iterator::run_always () const
  99 {
 100   return true;
 101 }
 102
 103 bool
 104 New_lyric_combine_music_iterator::ok () const
 105 {
 106   return lyric_iter_ && lyric_iter_->ok ();
 107 }
 108
 109 void
 110 New_lyric_combine_music_iterator::derived_mark()const
 111 {
 112   if (lyric_iter_)
 113     scm_gc_mark (lyric_iter_->self_scm ());
 114   if (lyrics_context_)
 115     scm_gc_mark (lyrics_context_->self_scm ());
 116   if (music_context_)
 117     scm_gc_mark (music_context_->self_scm ());
 118 }
 119
 120 void
 121 New_lyric_combine_music_iterator::derived_substitute (Translator_group*f, Translator_group*t)
 122 {
 123   if (lyric_iter_)
 124     lyric_iter_->substitute_outlet (f,t);
 125   if (lyrics_context_ && lyrics_context_==f)
 126     lyrics_context_ = t;
 127   if (music_context_ && music_context_ == f)
 128     music_context_ = t;
 129 }
 130
 131 /*
 132   ID == "" means accept any ID.
 133  */
 134 Translator_group *
 135 find_context_below (Translator_group * where,
 136                     String type, String id)
 137 {
 138   if (where->context_name () == type)
 139     {
 140       if (id == "" || where->id_string_ == id)
 141         return where;
 142     }
 143
 144   Translator_group * found = 0;
 145   for (SCM s = where->trans_group_list_;
 146        !found && gh_pair_p (s); s = gh_cdr (s))
 147     {
 148       Translator_group * tr = dynamic_cast<Translator_group*> (unsmob_translator (gh_car (s)));
 149
 150
 151       found = find_context_below (tr, type, id);
 152     }
 153
 154   return found;
 155 }
 156
 157
 158
 159 void
 160 New_lyric_combine_music_iterator::construct_children ()
 161 {
 162   Music *m = unsmob_music (get_music ()->get_mus_property ("element"));
 163   lyric_iter_ = unsmob_iterator (get_iterator (m));
 164
 165   find_thread ();
 166
 167   if (lyric_iter_)
 168     lyrics_context_ = find_context_below (lyric_iter_->report_to (),
 169                                           "LyricsVoice", "");
 170
 171   if (music_context_ && !lyrics_context_)
 172     lyrics_context_ = music_context_
 173       ->find_create_translator (ly_symbol2scm ("LyricsVoice"), "", SCM_EOL);
 174 }
 175
 176 void
 177 New_lyric_combine_music_iterator::find_thread ()
 178 {
 179   if (!music_context_)
 180     {
 181       SCM voice_name = get_music ()->get_mus_property ("associated-context");
 182
 183       if (gh_string_p (voice_name))
 184         {
 185           Translator_group *t = report_to ();
 186           while (t && t->daddy_trans_)
 187             t = t->daddy_trans_;
 188
 189           String name = ly_scm2string (voice_name);
 190           Translator_group *voice = find_context_below (t, "Voice", name);
 191           Translator_group *thread = 0;
 192           if (voice)
 193             thread = find_context_below (voice, "Thread", "");
 194           else
 195             get_music ()->origin ()->warning (_f ("Cannot find Voice: %s\n",
 196                                                   name.to_str0 ()));
 197
 198           if (thread)
 199             music_context_ = thread;
 200
 201           if (lyrics_context_ && voice)
 202             lyrics_context_->set_property ("associatedVoiceContext",
 203                                            voice->self_scm ());
 204         }
 205     }
 206 }
 207
 208 void
 209 New_lyric_combine_music_iterator::process (Moment )
 210 {
 211   find_thread ();
 212   if (!music_context_)
 213     return ;
 214
 215   if (!music_context_->daddy_trans_)
 216     {
 217       music_context_ = 0;
 218       if (lyrics_context_)
 219         lyrics_context_->unset_property (ly_symbol2scm ("associatedVoiceContext"));
 220     }
 221
 222   if (music_context_
 223       && start_new_syllable () && lyric_iter_->ok ())
 224     {
 225       Moment m= lyric_iter_->pending_moment ();
 226       lyric_iter_->process (m);
 227     }
 228 }
 229
 230 void
 231 New_lyric_combine_music_iterator::do_quit ()
 232 {
 233   if (lyric_iter_)
 234     lyric_iter_->quit();
 235 }
 236
 237 New_lyric_combine_music_iterator::New_lyric_combine_music_iterator (New_lyric_combine_music_iterator const & src)
 238     : Music_iterator (src)
 239 {
 240   lyric_iter_ = 0;
 241
 242   if (src.lyric_iter_)
 243     lyric_iter_ =  src.lyric_iter_->clone ();
 244
 245   if (lyric_iter_)
 246     scm_gc_unprotect_object (lyric_iter_->self_scm());
 247
 248   music_context_ = src.music_context_;
 249   lyric_iter_ = src.lyric_iter_;
 250
 251
 252   assert (false);               // shouldn't copy, really.
 253 }
 254
 255
 256 Music_iterator*
 257 New_lyric_combine_music_iterator::try_music_in_children (Music *m) const
 258 {
 259   return lyric_iter_->try_music (m);
 260 }
 261
 262
 263 IMPLEMENT_CTOR_CALLBACK (New_lyric_combine_music_iterator);