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--2000 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 #include "request.hh"
  34 #include "request-iterator.hh"
  35
  36 void
  37 Music_iterator::do_print() const
  38 {
  39 }
  40
  41 void
  42 Music_iterator::print() const
  43 {
  44 #ifndef NPRINT
  45   if (!flower_dstream)
  46     return ;
  47   DEBUG_OUT << classname(this) << "{";
  48   Translator_group *t =     report_to_l();
  49   DEBUG_OUT << "report to " << t->type_str_ << " = " << t->id_str_ << "\n";
  50   if (ok())
  51     DEBUG_OUT << "next at " << next_moment() << " ";
  52   else
  53     DEBUG_OUT << "not feeling well today..";
  54   do_print();
  55   DEBUG_OUT << "}\n";
  56 #endif
  57 }
  58
  59 Translator_group*
  60 Music_iterator::get_req_translator_l()
  61 {
  62   assert (report_to_l());
  63   if (report_to_l()->is_bottom_translator_b ())
  64     return report_to_l();
  65
  66   set_translator (report_to_l()->get_default_interpreter ());
  67   return report_to_l();
  68 }
  69
  70
  71 Translator_group*
  72 Music_iterator::report_to_l() const
  73 {
  74   return handle_.report_to_l ();
  75 }
  76
  77
  78 void
  79 Music_iterator::set_translator (Translator_group*trans)
  80 {
  81   handle_.set_translator (trans);
  82 }
  83
  84 void
  85 Music_iterator::construct_children()
  86 {
  87 }
  88
  89 Music_iterator::~Music_iterator()
  90 {
  91 }
  92
  93 Moment
  94 Music_iterator::next_moment() const
  95 {
  96   return 0;
  97 }
  98
  99
 100 void
 101 Music_iterator::process_and_next (Moment m)
 102 {
 103   do_process_and_next (m);
 104 }
 105
 106 void
 107 Music_iterator::do_process_and_next (Moment)
 108 {
 109   first_b_ = false;
 110 }
 111
 112 bool
 113 Music_iterator::ok() const
 114 {
 115   return first_b_;
 116 }
 117
 118 Music_iterator*
 119 Music_iterator::static_get_iterator_p (Music const *m)
 120 {
 121   Music_iterator * p =0;
 122
 123   /* It would be nice to do this decentrally, but the order of this is
 124      significant.  */
 125   if (dynamic_cast<Request_chord  const *> (m))
 126     p = new Request_chord_iterator;
 127   else if (dynamic_cast<Lyric_combine_music const*> (m))
 128     p = new Lyric_combine_music_iterator;
 129   else if (dynamic_cast<Simultaneous_music  const *> (m))
 130     p =  new Simultaneous_music_iterator;
 131   else if (dynamic_cast<Sequential_music  const *> (m))
 132     p =  new Sequential_music_iterator;
 133   else if (dynamic_cast<Translation_property  const *> (m))
 134     p = new Property_iterator;
 135   else if (dynamic_cast<Change_translator  const *> (m))
 136     p = new Change_iterator;
 137   else if (dynamic_cast<Time_scaled_music  const *> (m))
 138     p = new Time_scaled_music_iterator;
 139   else if (dynamic_cast<Grace_music const*> (m))
 140     p = new Grace_iterator;
 141   else if (dynamic_cast<Auto_change_music const*> (m))
 142     p = new Auto_change_iterator;
 143   else if (dynamic_cast<Music_wrapper  const *> (m))
 144     p = new Music_wrapper_iterator;
 145   else if (Repeated_music const * n = dynamic_cast<Repeated_music const *> (m))
 146     {
 147       if (n->fold_b_)
 148         p = new Folded_repeat_iterator;
 149       else
 150         p = new Unfolded_repeat_iterator;
 151     }
 152   else if (Request const * r = dynamic_cast<Request const* > (m))
 153     {
 154       p = new Request_iterator ;
 155     }
 156   else
 157     assert (0);
 158
 159   p->music_l_ = m;
 160   return p;
 161 }
 162
 163 void
 164 Music_iterator::init_translator (Music const *m, Translator_group  *report_l)
 165 {
 166   music_l_ = m;
 167   if (Context_specced_music const * csm =dynamic_cast<Context_specced_music const*>(m))
 168     {
 169       Translator_group* a =report_l->
 170         find_create_translator_l (csm->translator_type_str_, csm->translator_id_str_);
 171
 172       set_translator (a);
 173
 174     }
 175
 176   if (! report_to_l())
 177     set_translator (report_l);
 178 }
 179
 180
 181 Music_iterator*
 182 Music_iterator::get_iterator_p (Music const*m) const
 183 {
 184   Music_iterator*p = static_get_iterator_p (m);
 185   p->init_translator (m, report_to_l());
 186
 187   p->construct_children();
 188   return p;
 189 }
 190
 191 Music_iterator::Music_iterator()
 192 {
 193   first_b_ = true;
 194 }
 195
 196 Music_iterator*
 197 Music_iterator::try_music (Music const *m) const
 198 {
 199   bool b = report_to_l ()->try_music ((Music*)m); // ugh
 200   Music_iterator * it = b ? (Music_iterator*) this : 0; // ugh
 201   if (!it)
 202     it = try_music_in_children (m);
 203   return it;
 204 }
 205
 206 Music_iterator*
 207 Music_iterator::try_music_in_children (Music const *  ) const
 208 {
 209   return 0;
 210 }
 211