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