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 "sequential-music-iterator.hh"
  12 #include "translator-group.hh"
  13 #include "musical-request.hh"
  14 #include "warn.hh"
  15
  16 Part_combine_music_iterator::Part_combine_music_iterator ()
  17 {
  18   combined_b_ = true;
  19
  20   now_ = 0;
  21   first_iter_p_ = 0;
  22   second_iter_p_ = 0;
  23   first_until_ = 0;
  24   second_until_ = 0;
  25 }
  26
  27 Part_combine_music_iterator::~Part_combine_music_iterator ()
  28 {
  29   delete second_iter_p_;
  30   delete first_iter_p_;
  31 }
  32
  33 Moment
  34 Part_combine_music_iterator::next_moment () const
  35 {
  36   Moment first_next = infinity_mom;
  37   if (first_iter_p_->ok ())
  38     first_next = first_iter_p_->next_moment ();
  39   Moment second_next = infinity_mom;
  40   if (second_iter_p_->ok ())
  41     second_next = second_iter_p_->next_moment ();
  42   if (first_next == infinity_mom && second_next == infinity_mom)
  43     return 0;
  44   return first_next <? second_next;
  45 }
  46
  47 bool
  48 Part_combine_music_iterator::ok () const
  49 {
  50   //hmm
  51   return first_iter_p_->ok () || second_iter_p_->ok ();
  52 }
  53
  54 void
  55 Part_combine_music_iterator::do_print () const
  56 {
  57   first_iter_p_->print ();
  58   second_iter_p_->print ();
  59 }
  60
  61 void
  62 Part_combine_music_iterator::construct_children ()
  63 {
  64   Part_combine_music const * m = dynamic_cast<Part_combine_music const*> (music_l_);
  65
  66   first_iter_p_ = get_iterator_p (m->first_l ());
  67   second_iter_p_ = get_iterator_p (m->second_l ());
  68 }
  69
  70 void
  71 Part_combine_music_iterator::change_to (Music_iterator *it, String to_type,
  72                                         String to_id)
  73 {
  74   Translator_group * current = it->report_to_l ();
  75   Translator_group * last = 0;
  76
  77   /*
  78     Cut & Paste from from Auto_change_iterator from Change_iterator (ugh).
  79
  80     TODO: abstract this function
  81    */
  82
  83   /* find the type  of translator that we're changing.
  84
  85      If \translator Staff = bass, then look for Staff = *
  86    */
  87   while  (current && current->type_str_ != to_type)
  88     {
  89       last = current;
  90       current = current->daddy_trans_l_;
  91     }
  92
  93   if (current && current->id_str_ == to_id)
  94     {
  95       String msg;
  96       msg += _ ("Can't switch translators, I'm there already");
  97     }
  98
  99   if (current)
 100     if (last)
 101       {
 102         Translator_group * dest =
 103           it->report_to_l ()->find_create_translator_l (to_type, to_id);
 104         current->remove_translator_p (last);
 105         dest->add_translator (last);
 106       }
 107     else
 108       {
 109         /*
 110           We could change the current translator's id, but that would make
 111           errors hard to catch
 112
 113            last->translator_id_str_  = change_l ()->change_to_id_str_;
 114         */
 115         error (_f ("I'm one myself: `%s'", to_type.ch_C ()));
 116       }
 117   else
 118     error (_f ("none of these in my family: `%s'", to_id.ch_C ()));
 119 }
 120
 121 Pitch_interrogate_req* first_spanish_inquisition; // nobody expects it
 122 Pitch_interrogate_req* second_spanish_inquisition; // won't strike twice
 123
 124 Rhythm_interrogate_req* first_rhythmic_inquisition;
 125 Rhythm_interrogate_req* second_rhythmic_inquisition;
 126
 127 #include <iostream.h>
 128
 129 void
 130 Part_combine_music_iterator::do_process_and_next (Moment m)
 131 {
 132   Part_combine_music const * p = dynamic_cast<Part_combine_music const* > (music_l_);
 133
 134   now_ = next_moment ();
 135
 136   Music* first_music = 0;
 137   Music* second_music = 0;
 138
 139   /*
 140     Hmm, shouldn't we check per iterator if next_moment < m?
 141    */
 142   if (first_iter_p_->ok ())
 143     {
 144       first_music = first_iter_p_->get_next_music ();
 145       first_iter_p_->process_and_next (m);
 146     }
 147
 148   if (second_iter_p_->ok ())
 149     {
 150       second_music = second_iter_p_->get_next_music ();
 151       second_iter_p_->process_and_next (m);
 152     }
 153
 154   Music_iterator::do_process_and_next (m);
 155
 156   /*
 157     TODO:
 158
 159     * Maybe we need a Skip_engraver?
 160
 161     (check): can this all be handled now?
 162
 163     Maybe different modes exist?
 164
 165     * Wind instruments (Flute I/II)
 166     * Hymnals:
 167
 168
 169       Rules for Hymnals/SATB (John Henckel <henckel@iname.com>):
 170
 171       1. if S and A differ by less than a third, the stems should be up/down.
 172       2. else if S and A have different values, the stems should be up/down.
 173       3. else if A sings "la" or higher, both S and A stems should be down.
 174       4. else both stems should be up
 175
 176     * This may get really tricky: combining voices/staffs: string instruments
 177
 178    */
 179
 180   if (!first_spanish_inquisition)
 181     first_spanish_inquisition = new Pitch_interrogate_req;
 182   first_iter_p_->try_music (first_spanish_inquisition);
 183
 184   if (!second_spanish_inquisition)
 185     second_spanish_inquisition = new Pitch_interrogate_req;
 186   second_iter_p_->try_music (second_spanish_inquisition);
 187
 188   Array<Musical_pitch>* first_pitches = &first_spanish_inquisition->pitch_arr_;
 189   Array<Musical_pitch>* second_pitches = &second_spanish_inquisition->pitch_arr_;
 190
 191   if (!first_rhythmic_inquisition)
 192     first_rhythmic_inquisition = new Rhythm_interrogate_req;
 193   first_iter_p_->try_music (first_rhythmic_inquisition);
 194
 195   if (!second_rhythmic_inquisition)
 196     second_rhythmic_inquisition = new Rhythm_interrogate_req;
 197   second_iter_p_->try_music (second_rhythmic_inquisition);
 198
 199   Array<Duration>* first_durations = &first_rhythmic_inquisition->duration_arr_;
 200   Array<Duration>* second_durations = &second_rhythmic_inquisition->duration_arr_;
 201
 202   if (!first_durations->empty ())
 203     cout << "first_durations: " << first_durations->top ().length_mom ().str () << endl;
 204
 205   //  if (Rhythmic_req *r = dynamic_cast<Rhythmic_req*> (first_music))
 206   if (first_music)
 207     cout << "first_music: " << first_music->length_mom ().str ();
 208
 209   SCM interval = SCM_BOOL_F;
 210   if (first_pitches->size () && second_pitches->size ())
 211     {
 212       first_pitches->sort (Musical_pitch::compare);
 213       second_pitches->sort (Musical_pitch::compare);
 214       interval = gh_int2scm (first_pitches->top ().steps ()
 215                              - (*second_pitches)[0].steps ());
 216     }
 217   if (first_durations->size ())
 218     {
 219       first_durations->sort (Duration::compare);
 220       Moment new_until = now_ + first_durations->top ().length_mom ();
 221       if (new_until > first_until_)
 222         first_until_ = new_until;
 223     }
 224
 225     if (second_durations->size ())
 226     {
 227       second_durations->sort (Duration::compare);
 228       Moment new_until = now_ + second_durations->top ().length_mom ();
 229       if (new_until > second_until_)
 230         second_until_ = new_until;
 231     }
 232
 233   Translator_group * fir = first_iter_p_->report_to_l ();
 234   Translator_group * sir = second_iter_p_->report_to_l ();
 235
 236   bool solo_b = (first_pitches->empty () != second_pitches->empty ())
 237     && !(first_until_ > now_ && second_until_ > now_);
 238
 239   bool unirhythm_b = !solo_b && !compare (first_durations, second_durations);
 240   bool unison_b = unirhythm_b && !first_pitches->empty ()
 241     &&!compare (first_pitches, second_pitches);
 242   bool unisilence_b = unirhythm_b && first_pitches->empty ();
 243
 244   Translator_group * fd = fir->find_create_translator_l (p->what_str_, "one");
 245   Translator_group * sd = sir->find_create_translator_l (p->what_str_, "two");
 246
 247   bool split_interval_b = false;
 248   if (gh_number_p (interval))
 249     {
 250       SCM s = fd->get_property (ly_symbol2scm ("splitInterval"));
 251       int i = gh_scm2int (interval);
 252       if (gh_pair_p (s)
 253           && gh_number_p (gh_car (s))
 254           && gh_number_p (gh_cdr (s))
 255           && i >= gh_scm2int (gh_car (s))
 256           && i <= gh_scm2int (gh_cdr (s)))
 257         split_interval_b = true;
 258     }
 259
 260   /*
 261     Hmm, maybe we should set/check combined_b_ against
 262
 263        first_iter_p_->report_to_l () == second_iter_p_->report_to_l ()
 264
 265    ?
 266    */
 267
 268   String to_id =  combined_b_ ? "one" : "two";
 269   if ((!unirhythm_b && combined_b_)
 270       || (split_interval_b && combined_b_)
 271       || (solo_b && combined_b_)
 272       /*|| (unisilence_b && combined_b_) */
 273       || ((unirhythm_b || unison_b || unisilence_b)
 274           && !combined_b_ && !split_interval_b && !solo_b))
 275     {
 276       combined_b_ = !combined_b_;
 277       to_id =  combined_b_ ? "one" : "two";
 278       change_to (second_iter_p_, p->what_str_, to_id);
 279     }
 280
 281   if (!combined_b_)
 282     sir = second_iter_p_->report_to_l ();
 283
 284   SCM b = unirhythm_b ? SCM_BOOL_T : SCM_BOOL_F;
 285   fd->set_property ("unirhythm", b);
 286   sd->set_property ("unirhythm", b);
 287
 288   b = split_interval_b ? SCM_BOOL_T : SCM_BOOL_F;
 289   fd->set_property ("split-interval", b);
 290   sd->set_property ("split-interval",  b);
 291
 292   b = unisilence_b ? SCM_BOOL_T : SCM_BOOL_F;
 293   fd->set_property ("unisilence", b);
 294   sd->set_property ("unisilence", b);
 295
 296   b = unison_b ? SCM_BOOL_T : SCM_BOOL_F;
 297   fd->set_property ("unison", b);
 298   sd->set_property ("unison", b);
 299
 300   b = solo_b  ? SCM_BOOL_T : SCM_BOOL_F;
 301   if (first_pitches->size ())
 302     {
 303       fd->set_property ("solo", b);
 304       sd->set_property ("solo", SCM_BOOL_F);
 305     }
 306
 307   if (second_pitches->size ())
 308     {
 309       fd->set_property ("solo", SCM_BOOL_F);
 310       sd->set_property ("solo", b);
 311     }
 312
 313   first_pitches->clear ();
 314   second_pitches->clear ();
 315   first_durations->clear ();
 316   second_durations->clear ();
 317 }
 318
 319 Music_iterator*
 320 Part_combine_music_iterator::try_music_in_children (Music *m) const
 321 {
 322   Music_iterator * i =  first_iter_p_->try_music (m);
 323   if (i)
 324     return i;
 325   else
 326     return second_iter_p_->try_music (m);
 327 }
 328