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 "property-iterator.hh"
  13 #include "chord-iterator.hh"
  14 #include "request-iterator.hh"
  15 #include "translator-group.hh"
  16 #include "translation-property.hh"
  17
  18 IMPLEMENT_IS_TYPE_B(Music_iterator);
  19
  20
  21 void
  22 Music_iterator::do_print() const
  23 {
  24
  25 }
  26
  27 void
  28 Music_iterator::print() const
  29 {
  30 #ifndef NPRINT
  31   if (!check_debug)
  32     return ;
  33   DOUT << name() << "{";
  34   DOUT << "report to " <<
  35     report_to_l() << " (" << report_to_l ()->name () << ")\n";
  36   if (ok())
  37     DOUT << "next at " << next_moment() << " ";
  38   else
  39     DOUT << "not feeling well today..";
  40   do_print();
  41   DOUT << "}\n";
  42 #endif
  43 }
  44
  45 Translator_group*
  46 Music_iterator::get_req_translator_l()
  47 {
  48   assert (report_to_l());
  49   if (report_to_l()->is_bottom_translator_b ())
  50     return report_to_l();
  51
  52   set_translator (report_to_l()->get_default_interpreter ());
  53   return report_to_l();
  54 }
  55
  56 void
  57 Music_iterator::push_translator (Translator_group*t)
  58 {
  59   report_to_l_arr_.push (t);
  60   t->iterator_count_ ++;
  61 }
  62
  63 void
  64 Music_iterator::pop_translator()
  65 {
  66   report_to_l()->iterator_count_ --;
  67   assert (report_to_l()->iterator_count_ >=0);
  68   report_to_l_arr_.pop();
  69 }
  70
  71 Translator_group*
  72 Music_iterator::report_to_l() const
  73 {
  74   if (! report_to_l_arr_.size())
  75     return 0;
  76   return report_to_l_arr_.top();
  77 }
  78
  79
  80 void
  81 Music_iterator::set_translator (Translator_group*trans)
  82 {
  83   if (report_to_l()==trans)
  84     return;
  85   if (report_to_l())
  86     pop_translator();
  87   if (trans)
  88     push_translator (trans);
  89 }
  90
  91 void
  92 Music_iterator::construct_children()
  93 {
  94
  95 }
  96
  97 Music_iterator::~Music_iterator()
  98 {
  99   set_translator (0);
 100 }
 101
 102 Moment
 103 Music_iterator::next_moment() const
 104 {
 105   return 0;
 106 }
 107
 108 void
 109 Music_iterator::process_and_next (Moment)
 110 {
 111   first_b_ = false;
 112 }
 113
 114 bool
 115 Music_iterator::ok() const
 116 {
 117   return first_b_;
 118 }
 119
 120 Music_iterator*
 121 Music_iterator::static_get_iterator_p (Music *m,
 122                                        Translator_group*report_l)
 123 {
 124   Music_iterator * p =0;
 125   if (m->is_type_b (Request_chord::static_name()))
 126     p = new Request_chord_iterator ((Request_chord*) m);
 127   else if (m->is_type_b (Chord::static_name()))
 128     p =  new Chord_iterator ((Chord*) m);
 129   else if (m->is_type_b (Voice::static_name()))
 130     p =  new Voice_iterator ((Voice*) m);
 131   else if (m->is_type_b (Translation_property::static_name ()))
 132     p = new Property_iterator((Translation_property *) m);
 133
 134   if (m -> translator_type_str_)
 135     {
 136       Translator_group* a =report_l->
 137         find_create_translator_l (m-> translator_type_str_, m->translator_id_str_);
 138       p->set_translator (a);
 139     }
 140
 141
 142   if (! p->report_to_l())
 143     p ->set_translator (report_l);
 144
 145   return p;
 146 }
 147
 148 Music_iterator*
 149 Music_iterator::get_iterator_p (Music*m) const
 150 {
 151   Music_iterator*p = static_get_iterator_p (m,report_to_l());
 152   p->daddy_iter_l_ = (Music_iterator*)this;
 153   p->construct_children();
 154   return p;
 155 }
 156
 157 Music_iterator::Music_iterator()
 158 {
 159   daddy_iter_l_ =0;
 160   first_b_ = true;
 161 }
 162