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 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8 #include "debug.hh"
   9 #include "music-list.hh"
  10 #include "music-iterator.hh"
  11 #include "voice-iterator.hh"
  12 #include "chord-iterator.hh"
  13 #include "request-iterator.hh"
  14 #include "translator.hh"
  15
  16
  17 IMPLEMENT_IS_TYPE_B(Music_iterator);
  18
  19
  20 void
  21 Music_iterator::do_print() const
  22 {
  23
  24 }
  25
  26 void
  27 Music_iterator::print() const
  28 {
  29 #ifndef NPRINT
  30   if (!check_debug)
  31     return ;
  32   DOUT << name() << "{";
  33   DOUT << "report to " <<
  34     report_to_l() << " (" << report_to_l ()->name () << ")\n";
  35   if (ok())
  36     DOUT << "next at " << next_moment() << " ";
  37   else
  38     DOUT << "not feeling well today..";
  39   do_print();
  40   DOUT << "}\n";
  41 #endif
  42 }
  43
  44 Translator *
  45 Music_iterator::get_req_translator_l()
  46 {
  47   assert (report_to_l());
  48   if (report_to_l()->is_bottom_engraver_b ())
  49     return report_to_l();
  50
  51   set_translator (report_to_l()->get_default_interpreter ());
  52   return report_to_l();
  53 }
  54
  55 void
  56 Music_iterator::push_translator (Translator*t)
  57 {
  58   report_to_l_arr_.push (t);
  59   t->iterator_count_ ++;
  60 }
  61
  62 void
  63 Music_iterator::pop_translator()
  64 {
  65   report_to_l()->iterator_count_ --;
  66   assert (report_to_l()->iterator_count_ >=0);
  67   report_to_l_arr_.pop();
  68 }
  69
  70 Translator*
  71 Music_iterator::report_to_l() const
  72 {
  73   if (! report_to_l_arr_.size())
  74     return 0;
  75   return report_to_l_arr_.top();
  76 }
  77
  78
  79 void
  80 Music_iterator::set_translator (Translator*trans)
  81 {
  82   if (report_to_l()==trans)
  83     return;
  84   if (report_to_l())
  85     pop_translator();
  86   if (trans)
  87     push_translator (trans);
  88 }
  89
  90 void
  91 Music_iterator::construct_children()
  92 {
  93
  94 }
  95
  96 Music_iterator::~Music_iterator()
  97 {
  98   set_translator (0);
  99 }
 100
 101 Moment
 102 Music_iterator::next_moment() const
 103 {
 104   return 0;
 105 }
 106
 107 void
 108 Music_iterator::process_and_next (Moment)
 109 {
 110   first_b_ = false;
 111 }
 112
 113 bool
 114 Music_iterator::ok() const
 115 {
 116   return first_b_;
 117 }
 118
 119 Music_iterator*
 120 Music_iterator::static_get_iterator_p (Music *m,
 121                                        Translator *report_l)
 122 {
 123   Music_iterator * p =0;
 124   if (m->is_type_b (Request_chord::static_name()))
 125     p = new Request_chord_iterator ((Request_chord*) m);
 126   else if (m->is_type_b (Chord::static_name()))
 127     p =  new Chord_iterator ((Chord*) m);
 128   else if (m->is_type_b (Voice::static_name()))
 129     p =  new Voice_iterator ((Voice*) m);
 130
 131   if (m -> type_str_ != "")
 132     {
 133       Translator * a =report_l->
 134         find_get_translator_l (m-> type_str_, m->id_str_);
 135       p->set_translator (a);
 136     }
 137
 138
 139   if (! p->report_to_l())
 140     p ->set_translator (report_l);
 141
 142   return p;
 143 }
 144
 145 Music_iterator*
 146 Music_iterator::get_iterator_p (Music*m) const
 147 {
 148   Music_iterator*p = static_get_iterator_p (m,report_to_l());
 149   p->daddy_iter_l_ = (Music_iterator*)this;
 150   p->construct_children();
 151   return p;
 152 }
 153
 154 Music_iterator::Music_iterator()
 155 {
 156   daddy_iter_l_ =0;
 157   first_b_ = true;
 158 }
 159