lily/part-combine-music-iterator.cc

   1 /*
   2   part-combine-music-iterator.cc -- implement  Part_combine_music_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000 Jan Nieuwenhuizen <janneke@gnu.org>
   7  */
   8
   9 #include "part-combine-music.hh"
  10 #include "part-combine-music-iterator.hh"
  11 #include "translator-group.hh"
  12 #include "musical-request.hh"
  13 #include "music-sequence.hh"
  14 #include "warn.hh"
  15
  16 Part_combine_music_iterator::Part_combine_music_iterator ()
  17 {
  18   first_iter_p_ = 0;
  19   second_iter_p_ = 0;
  20   first_until_ = 0;
  21   second_until_ = 0;
  22 }
  23
  24 Part_combine_music_iterator::~Part_combine_music_iterator ()
  25 {
  26   delete second_iter_p_;
  27   delete first_iter_p_;
  28 }
  29
  30 Moment
  31 Part_combine_music_iterator::pending_moment () const
  32 {
  33   Moment p;
  34   p.set_infinite (1);
  35   if (first_iter_p_->ok ())
  36     p = p <? first_iter_p_->pending_moment ();
  37
  38   if (second_iter_p_->ok ())
  39     p = p <? second_iter_p_->pending_moment ();
  40   return p;
  41 }
  42
  43 bool
  44 Part_combine_music_iterator::ok () const
  45 {
  46   return first_iter_p_->ok () || second_iter_p_->ok ();
  47 }
  48
  49 void
  50 Part_combine_music_iterator::construct_children ()
  51 {
  52   Part_combine_music const * m = dynamic_cast<Part_combine_music const*> (music_l_);
  53
  54   first_iter_p_ = get_iterator_p (m->first_l ());
  55   second_iter_p_ = get_iterator_p (m->second_l ());
  56 }
  57
  58 void
  59 Part_combine_music_iterator::change_to (Music_iterator *it, String to_type,
  60                                         String to_id)
  61 {
  62   Translator_group * current = it->report_to_l ();
  63   Translator_group * last = 0;
  64
  65   /*
  66     Cut & Paste from from Auto_change_iterator from Change_iterator (ugh).
  67
  68     TODO: abstract this function
  69    */
  70
  71   /* find the type  of translator that we're changing.
  72
  73      If \translator Staff = bass, then look for Staff = *
  74    */
  75   while  (current && current->type_str_ != to_type)
  76     {
  77       last = current;
  78       current = current->daddy_trans_l_;
  79     }
  80
  81   if (current && current->id_str_ == to_id)
  82     {
  83       String msg;
  84       msg += _ ("Can't switch translators, I'm there already");
  85     }
  86
  87   if (current)
  88     if (last)
  89       {
  90         Translator_group * dest =
  91           it->report_to_l ()->find_create_translator_l (to_type, to_id);
  92         current->remove_translator_p (last);
  93         dest->add_group_translator (last);
  94       }
  95     else
  96       {
  97         /*
  98           We could change the current translator's id, but that would make
  99           errors hard to catch
 100
 101            last->translator_id_str_  = change_l ()->change_to_id_str_;
 102         */
 103         error (_f ("I'm one myself: `%s'", to_type.ch_C ()));
 104       }
 105   else
 106     error (_f ("none of these in my family: `%s'", to_id.ch_C ()));
 107 }
 108
 109
 110 static void
 111 get_music_info (Moment m, Music_iterator* iter, Array<Musical_pitch> *pitches, Array<Duration> *durations)
 112 {
 113   if (iter->ok ())
 114     {
 115       for (SCM i = iter->get_music (m); gh_pair_p (i); i = gh_cdr (i))
 116         {
 117           Music *m = unsmob_music (gh_car (i));
 118           if (Melodic_req *r = dynamic_cast<Melodic_req *> (m))
 119             pitches->push (r->pitch_);
 120           if (Rhythmic_req *r = dynamic_cast<Rhythmic_req *> (m))
 121             durations->push (r->duration_);
 122         }
 123     }
 124 }
 125
 126 int
 127 Part_combine_music_iterator::get_state (Moment)
 128 {
 129   int state = UNKNOWN;
 130   Part_combine_music const *p = dynamic_cast<Part_combine_music const* > (music_l_);
 131   Translator_group *first_translator = first_iter_p_->report_to_l ()->find_create_translator_l (p->what_str_, "one");
 132
 133   SCM s = first_translator->get_property (ly_symbol2scm ("changeMoment"));
 134   Moment change_mom = *unsmob_moment (gh_car (s));
 135   Moment diff_mom = *unsmob_moment (gh_cdr (s));
 136
 137   Moment now = pending_moment ();
 138
 139   if (!now.mod_rat (change_mom))
 140     {
 141       SCM interval = SCM_BOOL_F;
 142       Moment first_mom = first_until_ - now;
 143       Moment second_mom = second_until_ - now;
 144
 145       bool first = true;
 146       Music_iterator *first_iter = first_iter_p_->clone ();
 147       Music_iterator *second_iter = second_iter_p_->clone ();
 148       while ((first_mom <? second_mom) < diff_mom
 149              && (first_iter->ok () || second_iter->ok ()))
 150         {
 151           Moment m;
 152           if (!second_iter->ok ())
 153             m = first_iter->pending_moment ();
 154           else if (!first_iter->ok ())
 155             m = second_iter->pending_moment ();
 156           else
 157             m = first_iter->pending_moment () <? second_iter->pending_moment ();
 158
 159           Array<Musical_pitch> first_pitches;
 160           Array<Duration> first_durations;
 161           get_music_info (m, first_iter, &first_pitches, &first_durations);
 162
 163           Array<Musical_pitch> second_pitches;
 164           Array<Duration> second_durations;
 165           get_music_info (m, second_iter, &second_pitches, &second_durations);
 166
 167           if (first_pitches.size () && second_pitches.size ())
 168             {
 169               first_pitches.sort (Musical_pitch::compare);
 170               second_pitches.sort (Musical_pitch::compare);
 171               interval = gh_int2scm (first_pitches.top ().steps ()
 172                                      - second_pitches[0].steps ());
 173             }
 174           if (first_durations.size ())
 175             {
 176               first_durations.sort (Duration::compare);
 177               first_mom += first_durations.top ().length_mom ();
 178               if (first && !first_pitches.empty ())
 179                 first_until_ = first_mom + now;
 180             }
 181
 182           if (second_durations.size ())
 183             {
 184               second_durations.sort (Duration::compare);
 185               second_mom += second_durations.top ().length_mom ();
 186               if (first && !second_pitches.empty ())
 187                 second_until_ = second_mom + now;
 188             }
 189           first = false;
 190
 191 #if 0 /* DEBUG */
 192           printf ("now: %s\n", now.str ().ch_C ());
 193           printf ("first: ");
 194           for (int i = 0; i < first_pitches.size (); i++)
 195             {
 196               printf ("%s, ", first_pitches[i].str ().ch_C ());
 197             }
 198           printf ("\nsecond: ");
 199           for (int i = 0; i < second_pitches.size (); i++)
 200             {
 201               printf ("%s, ", second_pitches[i].str ().ch_C ());
 202             }
 203           printf ("\n");
 204 #endif
 205
 206           if (!first_pitches.empty () && second_pitches.empty ()
 207               && !(second_until_ > now))
 208             {
 209               state |= UNRELATED;
 210               state &= ~UNISILENCE;
 211               if (!(state & ~(UNRELATED | SOLO1 | UNISILENCE)))
 212                 state |= SOLO1;
 213             }
 214           else
 215             state &= ~SOLO1;
 216
 217           if (first_pitches.empty () && !second_pitches.empty ()
 218               && !(first_until_ > now))
 219             {
 220               state |= UNRELATED;
 221               state &= ~UNISILENCE;
 222               if (!(state & ~(UNRELATED | SOLO2 | UNISILENCE)))
 223                 state |= SOLO2;
 224             }
 225           else
 226             state &= ~SOLO2;
 227
 228           if (!compare (&first_durations, &second_durations))
 229             {
 230               state &= ~UNISILENCE;
 231               if (!(state & ~(UNIRHYTHM | UNISON)))
 232                 state |= UNIRHYTHM;
 233             }
 234           else
 235             state &= ~(UNIRHYTHM | UNISILENCE);
 236
 237           if (!first_pitches.empty ()
 238               &&!compare (&first_pitches, &second_pitches))
 239             {
 240               state &= ~UNISILENCE;
 241               if (!(state & ~(UNIRHYTHM | UNISON)))
 242                 state |= UNISON;
 243             }
 244           else
 245             state &= ~(UNISON);
 246
 247           if (first_pitches.empty () && second_pitches.empty ())
 248             {
 249               if (!(state & ~(UNIRHYTHM | UNISILENCE)))
 250                 state |= UNISILENCE;
 251             }
 252           else
 253             state &= ~(UNISILENCE);
 254
 255           if (gh_number_p (interval))
 256             {
 257               SCM s = first_translator->get_property (ly_symbol2scm ("splitInterval"));
 258               int i = gh_scm2int (interval);
 259               if (gh_pair_p (s)
 260                   && gh_number_p (gh_car (s))
 261                   && gh_number_p (gh_cdr (s))
 262                   && i >= gh_scm2int (gh_car (s))
 263                   && i <= gh_scm2int (gh_cdr (s)))
 264                 {
 265                   if (!(state & ~(SPLIT_INTERVAL | UNIRHYTHM | UNISON)))
 266                     state |= SPLIT_INTERVAL;
 267                 }
 268               else
 269                 state &= ~(SPLIT_INTERVAL);
 270             }
 271
 272 #if 0
 273           Moment next = (first_mom <? second_mom) + now;
 274           if (first_iter->ok ())
 275             first_iter->skip (next);
 276           if (second_iter->ok ())
 277             second_iter->skip (next);
 278 #else
 279           if (first_iter->ok ())
 280             first_iter->skip (first_mom + now);
 281           if (second_iter->ok ())
 282             second_iter->skip (second_mom + now);
 283 #endif
 284         }
 285       delete first_iter;
 286       delete second_iter;
 287     }
 288   return state;
 289 }
 290
 291 void
 292 Part_combine_music_iterator::process (Moment m)
 293 {
 294
 295   /*
 296     TODO:
 297     - Use three named contexts (be it Thread or Voice): one, two, solo.
 298       Let user pre-set (pushproperty) stem direction, remove
 299       dynamic-engraver, and such.
 300    */
 301
 302   int state = get_state (m);
 303   if (state)
 304     state_ = state;
 305   else
 306     state = state_;
 307
 308   Part_combine_music const *p = dynamic_cast<Part_combine_music const* > (music_l_);
 309
 310   bool combined_b = first_iter_p_->report_to_l ()->daddy_trans_l_
 311     == second_iter_p_->report_to_l ()->daddy_trans_l_;
 312
 313   String to_id =  combined_b ? "one" : "two";
 314   if ((!(state & UNIRHYTHM) && combined_b)
 315       || ((state & SPLIT_INTERVAL) && combined_b)
 316       || ((state & (SOLO1 | SOLO2)) && combined_b)
 317       || (((state & (UNIRHYTHM | UNISILENCE))
 318            && !combined_b && !(state & SPLIT_INTERVAL)
 319            && !(state & (SOLO1 | SOLO2)))))
 320     {
 321       combined_b = !combined_b;
 322       to_id =  combined_b ? "one" : "two";
 323       change_to (second_iter_p_, p->what_str_, to_id);
 324     }
 325
 326
 327   Translator_group *first_translator = first_iter_p_->report_to_l ()->find_create_translator_l (p->what_str_, "one");
 328   Translator_group *second_translator = second_iter_p_->report_to_l ()->find_create_translator_l (p->what_str_, "two");
 329
 330   /*
 331     hmm
 332    */
 333   SCM b = (state & UNIRHYTHM) ? SCM_BOOL_T : SCM_BOOL_F;
 334   first_translator->set_property ("unirhythm", b);
 335   second_translator->set_property ("unirhythm", b);
 336
 337   b = (state & SPLIT_INTERVAL) ? SCM_BOOL_T : SCM_BOOL_F;
 338   first_translator->set_property ("split-interval", b);
 339   second_translator->set_property ("split-interval",  b);
 340
 341   b = (state & UNISILENCE) ? SCM_BOOL_T : SCM_BOOL_F;
 342   first_translator->set_property ("unisilence", b);
 343   second_translator->set_property ("unisilence", b);
 344
 345   // difference in definition...
 346   //b = ((state & UNISON) ? SCM_BOOL_T : SCM_BOOL_F;
 347   b = ((state & UNISON) && (state & UNIRHYTHM)) ? SCM_BOOL_T : SCM_BOOL_F;
 348   first_translator->set_property ("unison", b);
 349   second_translator->set_property ("unison", b);
 350
 351   SCM b1 = (state & SOLO1) ? SCM_BOOL_T : SCM_BOOL_F;
 352   SCM b2 = (state & SOLO2) ? SCM_BOOL_T : SCM_BOOL_F;
 353   first_translator->set_property ("solo", b1);
 354   second_translator->set_property ("solo", b2);
 355
 356   if (first_iter_p_->ok ())
 357     first_iter_p_->process (m);
 358
 359   if (second_iter_p_->ok ())
 360     second_iter_p_->process (m);
 361 }
 362
 363 Music_iterator*
 364 Part_combine_music_iterator::try_music_in_children (Music *m) const
 365 {
 366   Music_iterator * i =  first_iter_p_->try_music (m);
 367   if (i)
 368     return i;
 369   else
 370     return second_iter_p_->try_music (m);
 371 }
 372
 373
 374 SCM
 375 Part_combine_music_iterator::get_music (Moment m)const
 376 {
 377   SCM s = SCM_EOL;
 378   if (first_iter_p_)
 379     s = gh_append2 (s,first_iter_p_->get_music (m));
 380   if (second_iter_p_)
 381     s = gh_append2 (second_iter_p_->get_music (m),s);
 382   return s;
 383 }