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 "sequential-music-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 #include "repeated-music.hh"
  24 #include "repeated-music-iterator.hh"
  25
  26 void
  27 Music_iterator::do_print() const
  28 {
  29 }
  30
  31 void
  32 Music_iterator::print() const
  33 {
  34 #ifndef NPRINT
  35   if (!check_debug)
  36     return ;
  37   DOUT << classname(this) << "{";
  38   DOUT << "report to " <<
  39     report_to_l() << " (" << classname (report_to_l ()) << ")\n";
  40   if (ok())
  41     DOUT << "next at " << next_moment() << " ";
  42   else
  43     DOUT << "not feeling well today..";
  44   do_print();
  45   DOUT << "}\n";
  46 #endif
  47 }
  48
  49 Translator_group*
  50 Music_iterator::get_req_translator_l()
  51 {
  52   assert (report_to_l());
  53   if (report_to_l()->is_bottom_translator_b ())
  54     return report_to_l();
  55
  56   set_translator (report_to_l()->get_default_interpreter ());
  57   return report_to_l();
  58 }
  59
  60 void
  61 Music_iterator::push_translator (Translator_group*t)
  62 {
  63   report_to_l_arr_.push (t);
  64   t->iterator_count_ ++;
  65 }
  66
  67 void
  68 Music_iterator::pop_translator()
  69 {
  70   report_to_l()->iterator_count_ --;
  71   assert (report_to_l()->iterator_count_ >=0);
  72   report_to_l_arr_.pop();
  73 }
  74
  75 Translator_group*
  76 Music_iterator::report_to_l() const
  77 {
  78   if (! report_to_l_arr_.size())
  79     return 0;
  80   return report_to_l_arr_.top();
  81 }
  82
  83
  84 void
  85 Music_iterator::set_translator (Translator_group*trans)
  86 {
  87   if (report_to_l()==trans)
  88     return;
  89   if (report_to_l())
  90     pop_translator();
  91   if (trans)
  92     push_translator (trans);
  93 }
  94
  95 void
  96 Music_iterator::construct_children()
  97 {
  98
  99 }
 100
 101 Music_iterator::~Music_iterator()
 102 {
 103   set_translator (0);
 104 }
 105
 106 Moment
 107 Music_iterator::next_moment() const
 108 {
 109   return 0;
 110 }
 111
 112
 113 void
 114 Music_iterator::process_and_next (Moment m)
 115 {
 116   do_process_and_next (m);
 117 }
 118
 119 void
 120 Music_iterator::do_process_and_next (Moment)
 121 {
 122   first_b_ = false;
 123 }
 124
 125 bool
 126 Music_iterator::ok() const
 127 {
 128   return first_b_;
 129 }
 130
 131 Music_iterator*
 132 Music_iterator::static_get_iterator_p (Music const *m, Translator_group *report_l)
 133 {
 134   Music_iterator * p =0;
 135   if (dynamic_cast<Request_chord  const *> (m))
 136     p = new Request_chord_iterator;
 137   else if (dynamic_cast<Simultaneous_music  const *> (m))
 138     p =  new Simultaneous_music_iterator;
 139   else if (dynamic_cast<Sequential_music  const *> (m))
 140     p =  new Sequential_music_iterator;
 141   else if (dynamic_cast<Translation_property  const *> (m))
 142     p = new Property_iterator;
 143   else if (dynamic_cast<Change_translator  const *> (m))
 144     p = new Change_iterator;
 145   else if (dynamic_cast<Compressed_music  const *> (m))
 146     p = new Compressed_music_iterator;
 147   else if (dynamic_cast<Music_wrapper  const *> (m))
 148     p = new Music_wrapper_iterator;
 149   else if (dynamic_cast<Repeated_music const *> (m))
 150     p = new Repeated_music_iterator;
 151   else
 152     assert (0);
 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
 170 Music_iterator*
 171 Music_iterator::get_iterator_p (Music const*m) const
 172 {
 173   Music_iterator*p = static_get_iterator_p (m, report_to_l());
 174   p->construct_children();
 175   return p;
 176 }
 177
 178 Music_iterator::Music_iterator()
 179 {
 180   first_b_ = true;
 181 }
 182
 183