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   unirhythm_b_ = false;
  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   String to_id =  unirhythm_b_ ? "one" : "two";
 123   /*
 124     different rhythm for combined voices: separate
 125     same rhythm for separated voices: combine
 126
 127     Arg.  Voices should be separated for small intervals, eg < 3.
 128     This should be \property settable, and, we need the outcome
 129     of the spanish_inquisition's...
 130
 131     Can't we first do a process_and_next go into a fake/tmp tree,
 132     use + junk the result, and then do the real process_and_next...?
 133
 134   */
 135   if ((first_next != second_next && unirhythm_b_)
 136       || (first_next == second_next && !unirhythm_b_))
 137     {
 138       unirhythm_b_ = !unirhythm_b_;
 139       to_id =  unirhythm_b_ ? "one" : "two";
 140       change_to (second_iter_p_, p->what_str_, to_id);
 141     }
 142
 143   Translator_group * fd =
 144     first_iter_p_->report_to_l ()->find_create_translator_l (p->what_str_,
 145                                                              "one");
 146   Translator_group * sd =
 147     second_iter_p_->report_to_l ()->find_create_translator_l (p->what_str_,
 148                                                               to_id);
 149
 150   fd->set_property ("unirhythm", unirhythm_b_ ? SCM_BOOL_T : SCM_BOOL_F);
 151   sd->set_property ("unirhythm", unirhythm_b_ ? SCM_BOOL_T : SCM_BOOL_F);
 152   first_iter_p_->report_to_l ()->set_property ("unirhythm", unirhythm_b_ ? SCM_BOOL_T : SCM_BOOL_F);
 153   second_iter_p_->report_to_l ()->set_property ("unirhythm", unirhythm_b_ ? SCM_BOOL_T : SCM_BOOL_F);
 154
 155   if (first_next <= m)
 156     first_iter_p_->process_and_next (m);
 157
 158   if (second_next <= m)
 159     second_iter_p_->process_and_next (m);
 160
 161   Music_iterator::do_process_and_next (m);
 162
 163   /*
 164     TODO:
 165
 166     * "a2" string is fine, but "Soli" strings are one request late??
 167
 168       The problem seems to be: we need to do_try_music for the
 169       spanish_inquisition to work; but the properties that we set
 170       need to be set *before* we do_try_music?
 171
 172     * setting of stem directions by a2-engraver don't work
 173
 174     * separate for small ( <3 ?) intervals too
 175
 176     Later (because currently, we only handle thread switching, really):
 177
 178     Maybe different modes exist?
 179
 180     * Wind instruments (Flute I/II)
 181     * Hymnals:
 182
 183
 184       Rules for Hymnals/SATB (John Henckel <henckel@iname.com>):
 185
 186       1. if S and A differ by less than a third, the stems should be up/down.
 187       2. else if S and A have different values, the stems should be up/down.
 188       3. else if A sings "la" or higher, both S and A stems should be down.
 189       4. else both stems should be up
 190
 191     * This may get really tricky: combining voices/staffs: string instruments
 192
 193    */
 194
 195   if (!first_spanish_inquisition)
 196     first_spanish_inquisition = new Pitch_interrogate_req;
 197   Music_iterator* fit = first_iter_p_->try_music (first_spanish_inquisition);
 198
 199   if (!second_spanish_inquisition)
 200     second_spanish_inquisition = new Pitch_interrogate_req;
 201   Music_iterator* sit = second_iter_p_->try_music (second_spanish_inquisition);
 202
 203   if ((first_next == second_next)
 204       && !compare (&first_spanish_inquisition->pitch_arr_,
 205                    &second_spanish_inquisition->pitch_arr_))
 206     {
 207       fd->set_property ("unison", SCM_BOOL_T);
 208       sd->set_property ("unison", SCM_BOOL_T);
 209       first_iter_p_->report_to_l ()->set_property ("unison", SCM_BOOL_T);
 210       second_iter_p_->report_to_l ()->set_property ("unison", SCM_BOOL_T);
 211     }
 212   else
 213     {
 214       fd->set_property ("unison", SCM_BOOL_F);
 215       sd->set_property ("unison", SCM_BOOL_F);
 216       first_iter_p_->report_to_l ()->set_property ("unison", SCM_BOOL_F);
 217       second_iter_p_->report_to_l ()->set_property ("unison", SCM_BOOL_F);
 218     }
 219
 220   if (first_spanish_inquisition->pitch_arr_.size () &&
 221       second_spanish_inquisition->pitch_arr_.size ())
 222     {
 223       first_spanish_inquisition->pitch_arr_.sort (Musical_pitch::compare);
 224       second_spanish_inquisition->pitch_arr_.sort (Musical_pitch::compare);
 225       SCM interval = gh_int2scm (first_spanish_inquisition->pitch_arr_.top ().semitone_pitch ()
 226                                  - second_spanish_inquisition->pitch_arr_[0].semitone_pitch ());
 227       fd->set_property ("interval", interval);
 228       sd->set_property ("interval", interval);
 229       first_iter_p_->report_to_l ()->set_property ("interval", interval);
 230       second_iter_p_->report_to_l ()->set_property ("interval", interval);
 231     }
 232
 233   if (first_spanish_inquisition->pitch_arr_.size ()
 234       && !second_spanish_inquisition->pitch_arr_.size ())
 235     {
 236       fd->set_property ("solo", SCM_BOOL_T);
 237       first_iter_p_->report_to_l ()->set_property ("solo", SCM_BOOL_T);
 238     }
 239   else
 240     {
 241       fd->set_property ("solo", SCM_BOOL_F);
 242       first_iter_p_->report_to_l ()->set_property ("solo", SCM_BOOL_F);
 243     }
 244
 245
 246   if (!first_spanish_inquisition->pitch_arr_.size ()
 247       && second_spanish_inquisition->pitch_arr_.size ())
 248     {
 249       sd->set_property ("solo", SCM_BOOL_T);
 250       second_iter_p_->report_to_l ()->set_property ("solo", SCM_BOOL_T);
 251     }
 252   else
 253     {
 254       sd->set_property ("solo", SCM_BOOL_F);
 255       second_iter_p_->report_to_l ()->set_property ("solo", SCM_BOOL_F);
 256     }
 257
 258   first_spanish_inquisition->pitch_arr_.clear ();
 259   second_spanish_inquisition->pitch_arr_.clear ();
 260 }
 261
 262 Music_iterator*
 263 Part_combine_music_iterator::try_music_in_children (Music *m) const
 264 {
 265   Music_iterator * i =  first_iter_p_->try_music (m);
 266   if (i)
 267     return i;
 268   else
 269     return second_iter_p_->try_music (m);
 270 }
 271