lily/music-iterator.cc

   1 /*
   2   music-iterator.cc -- implement Music_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8 #include "debug.hh"
   9 #include "music-list.hh"
  10 #include "music-iterator.hh"
  11 #include "property-iterator.hh"
  12 #include "request-chord-iterator.hh"
  13 #include "sequential-music-iterator.hh"
  14 #include "simultaneous-music-iterator.hh"
  15 #include "translator-group.hh"
  16 #include "translation-property.hh"
  17 #include "change-iterator.hh"
  18 #include "change-translator.hh"
  19 #include "music-wrapper.hh"
  20 #include "music-wrapper-iterator.hh"
  21 #include "time-scaled-music-iterator.hh"
  22 #include "time-scaled-music.hh"
  23 #include "context-specced-music.hh"
  24 #include "repeated-music.hh"
  25 #include "folded-repeat-iterator.hh"
  26 #include "unfolded-repeat-iterator.hh"
  27 #include "grace-iterator.hh"
  28 #include "grace-music.hh"
  29 #include "lyric-combine-music.hh"
  30 #include "lyric-combine-music-iterator.hh"
  31 #include "auto-change-music.hh"
  32 #include "auto-change-iterator.hh"
  33
  34 void
  35 Music_iterator::do_print() const
  36 {
  37 }
  38
  39 void
  40 Music_iterator::print() const
  41 {
  42 #ifndef NPRINT
  43   if (!flower_dstream)
  44     return ;
  45   DEBUG_OUT << classname(this) << "{";
  46   Translator_group *t =     report_to_l();
  47   DEBUG_OUT << "report to " << t->type_str_ << " = " << t->id_str_ << "\n";
  48   if (ok())
  49     DEBUG_OUT << "next at " << next_moment() << " ";
  50   else
  51     DEBUG_OUT << "not feeling well today..";
  52   do_print();
  53   DEBUG_OUT << "}\n";
  54 #endif
  55 }
  56
  57 Translator_group*
  58 Music_iterator::get_req_translator_l()
  59 {
  60   assert (report_to_l());
  61   if (report_to_l()->is_bottom_translator_b ())
  62     return report_to_l();
  63
  64   set_translator (report_to_l()->get_default_interpreter ());
  65   return report_to_l();
  66 }
  67
  68
  69 Translator_group*
  70 Music_iterator::report_to_l() const
  71 {
  72   return handle_.report_to_l ();
  73 }
  74
  75
  76 void
  77 Music_iterator::set_translator (Translator_group*trans)
  78 {
  79   handle_.set_translator (trans);
  80 }
  81
  82 void
  83 Music_iterator::construct_children()
  84 {
  85 }
  86
  87 Music_iterator::~Music_iterator()
  88 {
  89 }
  90
  91 Moment
  92 Music_iterator::next_moment() const
  93 {
  94   return 0;
  95 }
  96
  97
  98 void
  99 Music_iterator::process_and_next (Moment m)
 100 {
 101   do_process_and_next (m);
 102 }
 103
 104 void
 105 Music_iterator::do_process_and_next (Moment)
 106 {
 107   first_b_ = false;
 108 }
 109
 110 bool
 111 Music_iterator::ok() const
 112 {
 113   return first_b_;
 114 }
 115
 116 Music_iterator*
 117 Music_iterator::static_get_iterator_p (Music const *m)
 118 {
 119   Music_iterator * p =0;
 120
 121   /* It would be nice to do this decentrally, but the order of this is
 122      significant.  */
 123   if (dynamic_cast<Request_chord  const *> (m))
 124     p = new Request_chord_iterator;
 125   else if (dynamic_cast<Lyric_combine_music const*> (m))
 126     p = new Lyric_combine_music_iterator;
 127   else if (dynamic_cast<Simultaneous_music  const *> (m))
 128     p =  new Simultaneous_music_iterator;
 129   else if (dynamic_cast<Sequential_music  const *> (m))
 130     p =  new Sequential_music_iterator;
 131   else if (dynamic_cast<Translation_property  const *> (m))
 132     p = new Property_iterator;
 133   else if (dynamic_cast<Change_translator  const *> (m))
 134     p = new Change_iterator;
 135   else if (dynamic_cast<Time_scaled_music  const *> (m))
 136     p = new Time_scaled_music_iterator;
 137   else if (dynamic_cast<Grace_music const*> (m))
 138     p = new Grace_iterator;
 139   else if (dynamic_cast<Auto_change_music const*> (m))
 140     p = new Auto_change_iterator;
 141   else if (dynamic_cast<Music_wrapper  const *> (m))
 142     p = new Music_wrapper_iterator;
 143   else if (Repeated_music const * n = dynamic_cast<Repeated_music const *> (m))
 144     {
 145       if (n->fold_b_)
 146         p = new Folded_repeat_iterator;
 147       else
 148         p = new Unfolded_repeat_iterator;
 149     }
 150   else
 151     assert (0);
 152
 153
 154   p->music_l_ = m;
 155   return p;
 156 }
 157
 158 void
 159 Music_iterator::init_translator (Music const *m, Translator_group  *report_l)
 160 {
 161   music_l_ = m;
 162   if (Context_specced_music const * csm =dynamic_cast<Context_specced_music const*>(m))
 163     {
 164       Translator_group* a =report_l->
 165         find_create_translator_l (csm->translator_type_str_, csm->translator_id_str_);
 166
 167       set_translator (a);
 168
 169     }
 170
 171   if (! report_to_l())
 172     set_translator (report_l);
 173 }
 174
 175
 176 Music_iterator*
 177 Music_iterator::get_iterator_p (Music const*m) const
 178 {
 179   Music_iterator*p = static_get_iterator_p (m);
 180   p->init_translator (m, report_to_l());
 181
 182   p->construct_children();
 183   return p;
 184 }
 185
 186 Music_iterator::Music_iterator()
 187 {
 188   first_b_ = true;
 189 }
 190
 191 Music_iterator*
 192 Music_iterator::try_music (Music const *m) const
 193 {
 194   bool b = report_to_l ()->try_music ((Music*)m); // ugh
 195   Music_iterator * it = b ? (Music_iterator*) this : 0; // ugh
 196   if (!it)
 197     it = try_music_in_children (m);
 198   return it;
 199 }
 200
 201 Music_iterator*
 202 Music_iterator::try_music_in_children (Music const *  ) const
 203 {
 204   return 0;
 205 }
 206