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--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8 #include "debug.hh"
   9 #include "music-list.hh"
  10 #include "music-iterator.hh"
  11 #include "voice-iterator.hh"
  12 #include "property-iterator.hh"
  13 #include "chord-iterator.hh"
  14 #include "request-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 "compressed-music-iterator.hh"
  22 #include "compressed-music.hh"
  23
  24
  25
  26 IMPLEMENT_IS_TYPE_B(Music_iterator);
  27
  28
  29 void
  30 Music_iterator::do_print() const
  31 {
  32
  33 }
  34
  35 void
  36 Music_iterator::print() const
  37 {
  38 #ifndef NPRINT
  39   if (!check_debug)
  40     return ;
  41   DOUT << name() << "{";
  42   DOUT << "report to " <<
  43     report_to_l() << " (" << report_to_l ()->name () << ")\n";
  44   if (ok())
  45     DOUT << "next at " << next_moment() << " ";
  46   else
  47     DOUT << "not feeling well today..";
  48   do_print();
  49   DOUT << "}\n";
  50 #endif
  51 }
  52
  53 Translator_group*
  54 Music_iterator::get_req_translator_l()
  55 {
  56   assert (report_to_l());
  57   if (report_to_l()->is_bottom_translator_b ())
  58     return report_to_l();
  59
  60   set_translator (report_to_l()->get_default_interpreter ());
  61   return report_to_l();
  62 }
  63
  64 void
  65 Music_iterator::push_translator (Translator_group*t)
  66 {
  67   report_to_l_arr_.push (t);
  68   t->iterator_count_ ++;
  69 }
  70
  71 void
  72 Music_iterator::pop_translator()
  73 {
  74   report_to_l()->iterator_count_ --;
  75   assert (report_to_l()->iterator_count_ >=0);
  76   report_to_l_arr_.pop();
  77 }
  78
  79 Translator_group*
  80 Music_iterator::report_to_l() const
  81 {
  82   if (! report_to_l_arr_.size())
  83     return 0;
  84   return report_to_l_arr_.top();
  85 }
  86
  87
  88 void
  89 Music_iterator::set_translator (Translator_group*trans)
  90 {
  91   if (report_to_l()==trans)
  92     return;
  93   if (report_to_l())
  94     pop_translator();
  95   if (trans)
  96     push_translator (trans);
  97 }
  98
  99 void
 100 Music_iterator::construct_children()
 101 {
 102
 103 }
 104
 105 Music_iterator::~Music_iterator()
 106 {
 107   set_translator (0);
 108 }
 109
 110 Moment
 111 Music_iterator::next_moment() const
 112 {
 113   return 0;
 114 }
 115
 116
 117 void
 118 Music_iterator::process_and_next (Moment m)
 119 {
 120   do_process_and_next (m);
 121 }
 122
 123 void
 124 Music_iterator::do_process_and_next (Moment)
 125 {
 126   first_b_ = false;
 127 }
 128
 129 bool
 130 Music_iterator::ok() const
 131 {
 132   return first_b_;
 133 }
 134
 135 Music_iterator*
 136 Music_iterator::static_get_iterator_p (Music const *m, Translator_group *report_l)
 137 {
 138   Music_iterator * p =0;
 139   if (dynamic_cast<Request_chord  const *> (m))
 140     p = new Request_chord_iterator;
 141   else if (dynamic_cast<Simultaneous_music  const *> (m))
 142     p =  new Simultaneous_music_iterator;
 143   else if (dynamic_cast<Sequential_music  const *> (m))
 144     p =  new Sequential_music_iterator;
 145   else if (dynamic_cast<Translation_property  const *> (m))
 146     p = new Property_iterator;
 147   else if (dynamic_cast<Change_translator  const *> (m))
 148     p = new Change_iterator;
 149   else if (dynamic_cast<Compressed_music  const *> (m))
 150     p = new Compressed_music_iterator;
 151   else if (dynamic_cast<Music_wrapper  const *> (m))
 152     p = new Music_wrapper_iterator;
 153
 154   p->music_l_ = m;
 155   if (m->translator_type_str_.length_i ())
 156     {
 157       Translator_group* a =report_l->
 158         find_create_translator_l (m->translator_type_str_, m->translator_id_str_);
 159       p->set_translator (a);
 160     }
 161
 162   if (! p->report_to_l())
 163     p ->set_translator (report_l);
 164
 165
 166   return p;
 167 }
 168
 169 void
 170 Music_iterator::inherit_info(Music_iterator const *)
 171 {
 172 }
 173
 174 Music_iterator*
 175 Music_iterator::get_iterator_p (Music const*m) const
 176 {
 177   Music_iterator*p = static_get_iterator_p (m, report_to_l());
 178   p->inherit_info (this);
 179   p->construct_children();
 180   return p;
 181 }
 182
 183 Music_iterator::Music_iterator()
 184 {
 185   first_b_ = true;
 186 }
 187
 188