lily/request-chord-iterator.cc

   1 /*
   2   request-chord-iterator.cc -- implement Request_chord_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "translator-group.hh"
  10 #include "debug.hh"
  11 #include "request-chord-iterator.hh"
  12 #include "music-list.hh"
  13 #include "request.hh"
  14
  15
  16
  17 void
  18 Request_chord_iterator::construct_children()
  19 {
  20   elt_length_mom_ =elt_l ()->length_mom ();
  21   get_req_translator_l();
  22 }
  23
  24 Request_chord*
  25 Request_chord_iterator::elt_l () const
  26 {
  27   return (Request_chord*) music_l_;
  28 }
  29
  30 Request_chord_iterator::Request_chord_iterator ()
  31 {
  32   last_b_ = false;
  33   cursor_ = 0;
  34 }
  35
  36
  37 bool
  38 Request_chord_iterator::ok() const
  39 {
  40   return (elt_length_mom_ && !last_b_) || first_b_;
  41 }
  42
  43 Moment
  44 Request_chord_iterator::next_moment() const
  45 {
  46   Moment m (0);
  47   if  (!first_b_)
  48     m = elt_length_mom_;
  49   return m;
  50 }
  51
  52
  53 void
  54 Request_chord_iterator::do_print() const
  55 {
  56 #ifndef NPRINT
  57   DEBUG_OUT << "duration: " << elt_length_mom_;
  58 #endif
  59 }
  60
  61 void
  62 Request_chord_iterator::do_process_and_next (Moment mom)
  63 {
  64   if (first_b_)
  65     {
  66       for (Cons<Music> *i = elt_l ()->music_p_list_p_->head_; i; i = i->next_)
  67         {
  68           if (Request * req_l = dynamic_cast<Request*> (i->car_))
  69             {
  70               bool gotcha = try_music (req_l);
  71               if (!gotcha)
  72                 req_l->warning (_f ("Junking request: `%s'", classname( req_l)));
  73             }
  74           else
  75             i->car_->warning (_f ("Huh?  Not a Request: `%s'",
  76                                    classname (i->car_)));
  77         }
  78       first_b_ = false;
  79     }
  80
  81   if (mom >= elt_length_mom_)
  82     last_b_ = true;
  83 }