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