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 private:
  34   bool start_new_syllable () ;
  35
  36   Translator_group * lyrics_context_;
  37   Translator_group* music_context_;
  38   Music_iterator * lyric_iter_;
  39 };
  40
  41 /*
  42   Ugh, why static?
  43  */
  44 static Music *busy_ev;
  45 static Music *start_ev;
  46 static Music *melisma_playing_ev;
  47
  48 New_lyric_combine_music_iterator::New_lyric_combine_music_iterator ()
  49 {
  50   lyric_iter_ =0;
  51   music_context_ =0;
  52   lyrics_context_ = 0;
  53   if (!busy_ev)
  54     {
  55       busy_ev
  56         = make_music_by_name (ly_symbol2scm ("BusyPlayingEvent"));
  57       start_ev
  58         = make_music_by_name (ly_symbol2scm ("StartPlayingEvent"));
  59       melisma_playing_ev
  60         = make_music_by_name (ly_symbol2scm ("MelismaPlayingEvent"));
  61     }
  62 }
  63
  64 bool
  65 New_lyric_combine_music_iterator::start_new_syllable ()
  66 {
  67   bool b = music_context_->try_music (busy_ev);
  68
  69   if (!b)
  70     return false;
  71
  72   if (!to_boolean (lyrics_context_->get_property ("ignoreMelismata")))
  73     {
  74       bool m = music_context_->try_music (melisma_playing_ev);
  75       if (m)
  76         return false;
  77     }
  78
  79   return true;
  80 }
  81
  82 Moment
  83 New_lyric_combine_music_iterator::pending_moment () const
  84 {
  85   Moment m;
  86
  87   m.set_infinite (1);
  88
  89   return m;
  90 }
  91
  92 bool
  93 New_lyric_combine_music_iterator::run_always () const
  94 {
  95   return true;
  96 }
  97
  98 bool
  99 New_lyric_combine_music_iterator::ok () const
 100 {
 101   return music_context_ && lyric_iter_->ok ();
 102 }
 103
 104 void
 105 New_lyric_combine_music_iterator::derived_mark()const
 106 {
 107   if (lyric_iter_)
 108     scm_gc_mark (lyric_iter_->self_scm ());
 109   if (lyrics_context_)
 110     scm_gc_mark (lyrics_context_->self_scm ());
 111   if (music_context_)
 112     scm_gc_mark (music_context_->self_scm ());
 113 }
 114
 115 /*
 116   ID == "" means accept any ID.
 117  */
 118 Translator_group *
 119 find_context_below (Translator_group * where,
 120                     String type, String id)
 121 {
 122   if (where->context_name () == type)
 123     {
 124       if (id == "" || where->id_string_ == id)
 125         return where;
 126     }
 127
 128   Translator_group * found = 0;
 129   for (SCM s = where->trans_group_list_;
 130        !found && gh_pair_p (s); s = gh_cdr (s))
 131     {
 132       Translator_group * tr = dynamic_cast<Translator_group*> (unsmob_translator (gh_car (s)));
 133
 134
 135       found = find_context_below (tr, type, id);
 136     }
 137
 138   return found;
 139 }
 140
 141
 142
 143 void
 144 New_lyric_combine_music_iterator::construct_children ()
 145 {
 146   Music *m = unsmob_music (get_music ()->get_mus_property ("element"));
 147   lyric_iter_ = unsmob_iterator (get_iterator (m));
 148
 149   SCM voice_name = get_music ()->get_mus_property ("associated-context");
 150
 151
 152   Translator_group * thread = 0, *voice =0;
 153
 154   if (gh_string_p (voice_name))
 155     {
 156       Translator_group *t = report_to ();
 157       while (t && t->daddy_trans_)
 158         t = t->daddy_trans_;
 159
 160       voice = find_context_below (t, "Voice", ly_scm2string (voice_name));
 161       if (voice)
 162         thread = find_context_below (voice, "Thread", "");
 163     }
 164
 165   if (thread)
 166     {
 167       music_context_ = thread;
 168       lyrics_context_ = find_context_below (lyric_iter_->report_to (), "LyricsVoice", "");
 169
 170       if (lyrics_context_)
 171         lyrics_context_->set_property ("associatedVoiceContext",  voice->self_scm ());
 172     }
 173 }
 174
 175 void
 176 New_lyric_combine_music_iterator::process (Moment )
 177 {
 178   if (!music_context_->daddy_trans_)
 179     {
 180       music_context_ = 0;
 181       if (lyrics_context_)
 182         lyrics_context_->unset_property (ly_symbol2scm ("associatedVoiceContext"));
 183     }
 184
 185   if (music_context_
 186       && start_new_syllable () && lyric_iter_->ok ())
 187     {
 188       Moment m= lyric_iter_->pending_moment ();
 189       lyric_iter_->process (m);
 190     }
 191 }
 192
 193 void
 194 New_lyric_combine_music_iterator::do_quit ()
 195 {
 196   if (lyric_iter_)
 197     lyric_iter_->quit();
 198 }
 199
 200 New_lyric_combine_music_iterator::New_lyric_combine_music_iterator (New_lyric_combine_music_iterator const & src)
 201     : Music_iterator (src)
 202 {
 203   lyric_iter_ = 0;
 204
 205   if (src.lyric_iter_)
 206     lyric_iter_ =  src.lyric_iter_->clone ();
 207
 208   if (lyric_iter_)
 209     scm_gc_unprotect_object (lyric_iter_->self_scm());
 210
 211   music_context_ = src.music_context_;
 212   lyric_iter_ = src.lyric_iter_;
 213
 214
 215   assert (false);               // shouldn't copy, really.
 216 }
 217
 218
 219 Music_iterator*
 220 New_lyric_combine_music_iterator::try_music_in_children (Music *m) const
 221 {
 222   return lyric_iter_->try_music (m);
 223 }
 224
 225
 226 IMPLEMENT_CTOR_CALLBACK (New_lyric_combine_music_iterator);