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 #include "change-iterator.hh"
  18 #include "change-translator.hh"
  19
  20 IMPLEMENT_IS_TYPE_B(Music_iterator);
  21
  22
  23 void
  24 Music_iterator::do_print() const
  25 {
  26
  27 }
  28
  29 void
  30 Music_iterator::print() const
  31 {
  32 #ifndef NPRINT
  33   if (!check_debug)
  34     return ;
  35   DOUT << name() << "{";
  36   DOUT << "report to " <<
  37     report_to_l() << " (" << report_to_l ()->name () << ")\n";
  38   if (ok())
  39     DOUT << "next at " << next_moment() << " ";
  40   else
  41     DOUT << "not feeling well today..";
  42   do_print();
  43   DOUT << "}\n";
  44 #endif
  45 }
  46
  47 Translator_group*
  48 Music_iterator::get_req_translator_l()
  49 {
  50   assert (report_to_l());
  51   if (report_to_l()->is_bottom_translator_b ())
  52     return report_to_l();
  53
  54   set_translator (report_to_l()->get_default_interpreter ());
  55   return report_to_l();
  56 }
  57
  58 void
  59 Music_iterator::push_translator (Translator_group*t)
  60 {
  61   report_to_l_arr_.push (t);
  62   t->iterator_count_ ++;
  63 }
  64
  65 void
  66 Music_iterator::pop_translator()
  67 {
  68   report_to_l()->iterator_count_ --;
  69   assert (report_to_l()->iterator_count_ >=0);
  70   report_to_l_arr_.pop();
  71 }
  72
  73 Translator_group*
  74 Music_iterator::report_to_l() const
  75 {
  76   if (! report_to_l_arr_.size())
  77     return 0;
  78   return report_to_l_arr_.top();
  79 }
  80
  81
  82 void
  83 Music_iterator::set_translator (Translator_group*trans)
  84 {
  85   if (report_to_l()==trans)
  86     return;
  87   if (report_to_l())
  88     pop_translator();
  89   if (trans)
  90     push_translator (trans);
  91 }
  92
  93 void
  94 Music_iterator::construct_children()
  95 {
  96
  97 }
  98
  99 Music_iterator::~Music_iterator()
 100 {
 101   set_translator (0);
 102 }
 103
 104 Moment
 105 Music_iterator::next_moment() const
 106 {
 107   return 0;
 108 }
 109
 110 void
 111 Music_iterator::process_and_next (Moment)
 112 {
 113   first_b_ = false;
 114 }
 115
 116 bool
 117 Music_iterator::ok() const
 118 {
 119   return first_b_;
 120 }
 121
 122 Music_iterator*
 123 Music_iterator::static_get_iterator_p (Music *m,
 124                                        Translator_group*report_l)
 125 {
 126   Music_iterator * p =0;
 127   if (m->is_type_b (Request_chord::static_name()))
 128     p = new Request_chord_iterator ((Request_chord*) m);
 129   else if (m->is_type_b (Chord::static_name()))
 130     p =  new Chord_iterator ((Chord*) m);
 131   else if (m->is_type_b (Voice::static_name()))
 132     p =  new Voice_iterator ((Voice*) m);
 133   else if (m->is_type_b (Translation_property::static_name ()))
 134     p = new Property_iterator((Translation_property *) m);
 135   else if (m->is_type_b (Change_translator::static_name ()))
 136     p = new Change_iterator((Change_translator*) m);
 137
 138   if (m -> translator_type_str_)
 139     {
 140       Translator_group* a =report_l->
 141         find_create_translator_l (m-> translator_type_str_, m->translator_id_str_);
 142       p->set_translator (a);
 143     }
 144
 145   if (! p->report_to_l())
 146     p ->set_translator (report_l);
 147
 148   return p;
 149 }
 150
 151 Music_iterator*
 152 Music_iterator::get_iterator_p (Music*m) const
 153 {
 154   Music_iterator*p = static_get_iterator_p (m,report_to_l());
 155   p->daddy_iter_l_ = (Music_iterator*)this;
 156   p->construct_children();
 157   return p;
 158 }
 159
 160 Music_iterator::Music_iterator()
 161 {
 162   daddy_iter_l_ =0;
 163   first_b_ = true;
 164 }
 165