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 "warn.hh"
  14
  15 Part_combine_music_iterator::Part_combine_music_iterator ()
  16 {
  17   combined_b_ = true;
  18
  19   first_iter_p_ = 0;
  20   second_iter_p_ = 0;
  21 }
  22
  23 Part_combine_music_iterator::~Part_combine_music_iterator ()
  24 {
  25   delete second_iter_p_;
  26   delete first_iter_p_;
  27 }
  28
  29 Moment
  30 Part_combine_music_iterator::next_moment () const
  31 {
  32   Moment first_next = first_iter_p_->next_moment ();
  33   Moment second_next = second_iter_p_->next_moment ();
  34   return first_next <? second_next;
  35 }
  36
  37 bool
  38 Part_combine_music_iterator::ok () const
  39 {
  40   //hmm
  41   return first_iter_p_->ok ();
  42 }
  43
  44 void
  45 Part_combine_music_iterator::do_print () const
  46 {
  47   first_iter_p_->print ();
  48   second_iter_p_->print ();
  49 }
  50
  51 void
  52 Part_combine_music_iterator::construct_children ()
  53 {
  54   Part_combine_music const * m = dynamic_cast<Part_combine_music const*> (music_l_);
  55
  56   first_iter_p_ = get_iterator_p (m->first_l ());
  57   second_iter_p_ = get_iterator_p (m->second_l ());
  58 }
  59
  60 void
  61 Part_combine_music_iterator::change_to (Music_iterator *it, String to_type,
  62                                         String to_id)
  63 {
  64   Translator_group * current = it->report_to_l ();
  65   Translator_group * last = 0;
  66
  67   /*
  68     Cut & Paste from from Auto_change_iterator from Change_iterator (ugh).
  69
  70     TODO: abstract this function
  71    */
  72
  73   /* find the type  of translator that we're changing.
  74
  75      If \translator Staff = bass, then look for Staff = *
  76    */
  77   while  (current && current->type_str_ != to_type)
  78     {
  79       last = current;
  80       current = current->daddy_trans_l_;
  81     }
  82
  83   if (current && current->id_str_ == to_id)
  84     {
  85       String msg;
  86       msg += _ ("Can't switch translators, I'm there already");
  87     }
  88
  89   if (current)
  90     if (last)
  91       {
  92         Translator_group * dest =
  93           it->report_to_l ()->find_create_translator_l (to_type, to_id);
  94         current->remove_translator_p (last);
  95         dest->add_translator (last);
  96       }
  97     else
  98       {
  99         /*
 100           We could change the current translator's id, but that would make
 101           errors hard to catch
 102
 103            last->translator_id_str_  = change_l ()->change_to_id_str_;
 104         */
 105         error (_f ("I'm one myself: `%s'", to_type.ch_C ()));
 106       }
 107   else
 108     error (_f ("none of these in my family: `%s'", to_id.ch_C ()));
 109 }
 110
 111 Pitch_interrogate_req* first_spanish_inquisition; // nobody expects it
 112 Pitch_interrogate_req* second_spanish_inquisition; // won't strike twice
 113
 114 void
 115 Part_combine_music_iterator::do_process_and_next (Moment m)
 116 {
 117   Moment first_next = first_iter_p_->next_moment ();
 118   Moment second_next = second_iter_p_->next_moment ();
 119
 120   Part_combine_music const * p = dynamic_cast<Part_combine_music const* > (music_l_);
 121
 122   if (first_next <= m)
 123     first_iter_p_->process_and_next (m);
 124
 125   if (second_next <= m)
 126     second_iter_p_->process_and_next (m);
 127
 128   Music_iterator::do_process_and_next (m);
 129
 130   /*
 131     TODO:
 132
 133     * fix rhythm check
 134
 135     * check setting/resetting of properties
 136
 137     Later (because currently, we only handle thread switching, really):
 138
 139     Maybe different modes exist?
 140
 141     * Wind instruments (Flute I/II)
 142     * Hymnals:
 143
 144
 145       Rules for Hymnals/SATB (John Henckel <henckel@iname.com>):
 146
 147       1. if S and A differ by less than a third, the stems should be up/down.
 148       2. else if S and A have different values, the stems should be up/down.
 149       3. else if A sings "la" or higher, both S and A stems should be down.
 150       4. else both stems should be up
 151
 152     * This may get really tricky: combining voices/staffs: string instruments
 153
 154    */
 155
 156   if (!first_spanish_inquisition)
 157     first_spanish_inquisition = new Pitch_interrogate_req;
 158   Music_iterator* fit = first_iter_p_->try_music (first_spanish_inquisition);
 159
 160   if (!second_spanish_inquisition)
 161     second_spanish_inquisition = new Pitch_interrogate_req;
 162   Music_iterator* sit = second_iter_p_->try_music (second_spanish_inquisition);
 163
 164   Array<Musical_pitch>* first_arr_l = &first_spanish_inquisition->pitch_arr_;
 165   Array<Musical_pitch>* second_arr_l = &second_spanish_inquisition->pitch_arr_;
 166
 167   SCM interval = SCM_BOOL_F;
 168   if (first_arr_l->size () && second_arr_l->size ())
 169     {
 170       first_arr_l->sort (Musical_pitch::compare);
 171       second_arr_l->sort (Musical_pitch::compare);
 172       interval = gh_int2scm (first_arr_l->top ().steps ()
 173                              - (*second_arr_l)[0].steps ());
 174     }
 175
 176   Translator_group * fir = first_iter_p_->report_to_l ();
 177   Translator_group * sir = second_iter_p_->report_to_l ();
 178
 179   bool solo_b = (first_arr_l->empty () != second_arr_l->empty ());
 180
 181   /*
 182     Urg, this doesn't work at all.  Do we need to send out another inquisition?
 183    */
 184   bool unirhythm_b = (first_next == second_next) && !solo_b;
 185
 186   Translator_group * fd = fir->find_create_translator_l (p->what_str_, "one");
 187   Translator_group * sd = sir->find_create_translator_l (p->what_str_, "two");
 188
 189   bool split_interval_b = false;
 190   if (gh_number_p (interval))
 191     {
 192       SCM s = fd->get_property (ly_symbol2scm ("splitInterval"));
 193       int i = gh_scm2int (interval);
 194       if (gh_pair_p (s)
 195           && gh_number_p (gh_car (s))
 196           && gh_number_p (gh_cdr (s))
 197           && i >= gh_scm2int (gh_car (s))
 198           && i <= gh_scm2int (gh_cdr (s)))
 199         split_interval_b = true;
 200     }
 201
 202   /*
 203     Hmm, maybe we should set/check combined_b_ against
 204
 205        first_iter_p_->report_to_l () == second_iter_p_->report_to_l ()
 206
 207    ?
 208    */
 209
 210   String to_id =  combined_b_ ? "one" : "two";
 211   if ((!unirhythm_b && combined_b_)
 212       || (split_interval_b && combined_b_)
 213       || (solo_b && combined_b_)
 214       || (unirhythm_b && !combined_b_ && !split_interval_b && !solo_b))
 215     {
 216       combined_b_ = !combined_b_;
 217       to_id =  combined_b_ ? "one" : "two";
 218       change_to (second_iter_p_, p->what_str_, to_id);
 219     }
 220
 221   if (!combined_b_)
 222     sir = second_iter_p_->report_to_l ();
 223
 224   SCM b = unirhythm_b ? SCM_BOOL_T : SCM_BOOL_F;
 225   fd->set_property ("unirhythm", b);
 226   sd->set_property ("unirhythm", b);
 227
 228   b = split_interval_b ? SCM_BOOL_T : SCM_BOOL_F;
 229   fd->set_property ("split-interval", b);
 230   sd->set_property ("split-interval",  b);
 231
 232   b = gh_bool2scm (unirhythm_b && !compare (first_arr_l, second_arr_l));
 233   fd->set_property ("unison", b);
 234   sd->set_property ("unison", b);
 235
 236   b = solo_b  ? SCM_BOOL_T : SCM_BOOL_F;
 237   if (first_arr_l->size ())
 238     {
 239       fd->set_property ("solo", b);
 240       sd->set_property ("solo", SCM_BOOL_F);
 241     }
 242
 243   if (second_arr_l->size ())
 244     {
 245       fd->set_property ("solo", SCM_BOOL_F);
 246       sd->set_property ("solo", b);
 247     }
 248
 249   first_arr_l->clear ();
 250   second_arr_l->clear ();
 251 }
 252
 253 Music_iterator*
 254 Part_combine_music_iterator::try_music_in_children (Music *m) const
 255 {
 256   Music_iterator * i =  first_iter_p_->try_music (m);
 257   if (i)
 258     return i;
 259   else
 260     return second_iter_p_->try_music (m);
 261 }
 262