lily/request-iterator.cc

   1 /*
   2   request-iterator.cc -- implement Request_chord_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "translator-group.hh"
  10 #include "debug.hh"
  11 #include "request-iterator.hh"
  12 #include "music-list.hh"
  13 #include "request.hh"
  14
  15 IMPLEMENT_IS_TYPE_B1(Request_chord_iterator,Music_iterator);
  16
  17 void
  18 Request_chord_iterator::construct_children()
  19 {
  20   get_req_translator_l();
  21 }
  22
  23 Request_chord_iterator::Request_chord_iterator (Request_chord*el_l)
  24 {
  25   elt_l_ = el_l;
  26   MInterval elt_dur =el_l->time_int();
  27   elt_duration_ = elt_dur.length ();
  28   last_b_ = false;
  29 }
  30
  31
  32 bool
  33 Request_chord_iterator::ok() const
  34 {
  35   return (elt_duration_ && !last_b_) || first_b_;
  36 }
  37
  38
  39
  40 Moment
  41 Request_chord_iterator::next_moment() const
  42 {
  43   Moment m (0);
  44   if  (!first_b_)
  45     m = elt_duration_;
  46   return m;
  47 }
  48
  49 void
  50 Request_chord_iterator::do_print() const
  51 {
  52 #ifndef NPRINT
  53   DOUT << "duration: " << elt_duration_;
  54 #endif
  55 }
  56 void
  57 Request_chord_iterator::process_and_next (Moment mom)
  58 {
  59   if (first_b_)
  60     {
  61       for (PCursor<Music*> i (elt_l_->music_p_list_); i.ok(); i++)
  62         {
  63           assert (i->is_type_b (Request::static_name()));
  64           Request * req_l = (Request*)i.ptr();
  65           bool gotcha = report_to_l()->try_request (req_l);
  66           if (!gotcha)
  67             req_l->warning (_("Junking request: ") + String (req_l->name()));
  68
  69         }
  70       first_b_ = false;
  71     }
  72
  73   if (mom >= elt_duration_)
  74     last_b_ = true;
  75 }