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_ = 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 #if 0
 121   if (first_next > m || second_next > m)
 122     return;
 123 #endif
 124
 125   /*
 126     different rhythm for combined voices: separate
 127     same rhythm for separated voices: combine
 128   */
 129   if ((first_next != second_next && combined_b_)
 130       || (first_next == second_next && !combined_b_))
 131     {
 132       combined_b_ = !combined_b_;
 133       String to_id =  combined_b_ ? "first" : "second";
 134
 135       Part_combine_music const * p = dynamic_cast<Part_combine_music const* > (music_l_);
 136
 137       change_to (second_iter_p_, p->what_str_, to_id);
 138
 139       /*
 140         A quick ugly hack to see if it works..
 141        */
 142 #if 0
 143       Translator_group * fd =
 144         first_iter_p_->report_to_l ()->find_create_translator_l (p->what_str_,
 145                                                                  "first");
 146       Translator_group * sd =
 147         second_iter_p_->report_to_l ()->find_create_translator_l (p->what_str_,
 148                                                                   to_id);
 149 #else
 150       Translator_group * fd = first_iter_p_->report_to_l ();
 151       Translator_group * sd = second_iter_p_->report_to_l ();
 152 #endif
 153
 154       if (combined_b_)
 155         {
 156           fd->set_property ("verticalDirection", gh_int2scm (0));
 157           fd->set_property ("noteHeadStyle", ly_symbol2scm ("default"));
 158         }
 159       else
 160         {
 161           fd->set_property ("verticalDirection", gh_int2scm (1));
 162           fd->set_property ("noteHeadStyle", ly_symbol2scm ("diamond"));
 163           sd->set_property ("verticalDirection", gh_int2scm (-1));
 164         }
 165     }
 166
 167   first_iter_p_->process_and_next (m);
 168   second_iter_p_->process_and_next (m);
 169
 170   Music_iterator::do_process_and_next (m);
 171
 172
 173 #if 0
 174
 175   /*
 176     TODO:
 177
 178     * when combining two threads: check pitches, request stem directions
 179
 180     * a2-engraver to put texts a2/Solo/SoloII as appropriate.
 181
 182     * maybe the a2-engraver should set the stem directions, iso us?
 183
 184
 185     Maybe different modes exist?
 186
 187     * Wind instruments (Flute I/II)
 188     * Hymnals:
 189
 190
 191       Rules for Hymnals/SATB (John Henckel <henckel@iname.com>):
 192
 193       1. if S and A differ by less than a third, the stems should be up/down.
 194       2. else if S and A have different values, the stems should be up/down.
 195       3. else if A sings "la" or higher, both S and A stems should be down.
 196       4. else both stems should be up
 197
 198     * This may get really tricky: combining voices/staffs: string instruments
 199
 200    */
 201
 202   if (!first_spanish_inquisition)
 203     first_spanish_inquisition = new Pitch_interrogate_req;
 204   Music_iterator* fit = first_iter_p_->try_music (first_spanish_inquisition);
 205
 206   if (!second_spanish_inquisition)
 207     second_spanish_inquisition = new Pitch_interrogate_req;
 208   Music_iterator* sit = second_iter_p_->try_music (second_spanish_inquisition);
 209
 210   if (fit && first_spanish_inquisition->pitch_arr_.size ())
 211     {
 212       Musical_pitch p = spanish_inquisition->pitch_arr_[0];
 213       Direction s = Direction (sign(p.steps ()));
 214       if (s != where_dir_)
 215         {
 216           where_dir_ = s;
 217           String to_id =  (s >= 0) ?  "up" : "down";
 218           Part_combine_music const * auto_mus = dynamic_cast<Part_combine_music const* > (music_l_);
 219
 220           change_to (it, auto_mus->what_str_, to_id);
 221         }
 222     }
 223
 224   first_spanish_inquisition->pitch_arr_.clear ();
 225   second_spanish_inquisition->pitch_arr_.clear ();
 226 #endif
 227 }
 228
 229 Music_iterator*
 230 Part_combine_music_iterator::try_music_in_children (Music *m) const
 231 {
 232   Music_iterator * i =  first_iter_p_->try_music (m);
 233   if (i)
 234     return i;
 235   else
 236     return second_iter_p_->try_music (m);
 237 }
 238