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--1999 Han-Wen Nienhuys <hanwen@cs.uu.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
  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_ = elt_l ()->music_p_list_p_->head_;
  34   cursor_ = 0;
  35 }
  36
  37
  38 bool
  39 Request_chord_iterator::ok() const
  40 {
  41   return (elt_length_mom_ && !last_b_) || first_b_;
  42 }
  43
  44 Moment
  45 Request_chord_iterator::next_moment() const
  46 {
  47   Moment m (0);
  48   if  (!first_b_)
  49     m = elt_length_mom_;
  50   return m;
  51 }
  52
  53 Music*
  54 Request_chord_iterator::next_music_l ()
  55 {
  56   if (first_b_)
  57     {
  58       cursor_ = elt_l ()->music_p_list_p_->head_;
  59       first_b_ = false;
  60     }
  61   else
  62     {
  63       if (cursor_)
  64         cursor_ = cursor_->next_;
  65     }
  66   if (cursor_)
  67     return cursor_->car_;
  68   else
  69     return 0;
  70 }
  71
  72 void
  73 Request_chord_iterator::do_print() const
  74 {
  75 #ifndef NPRINT
  76   DOUT << "duration: " << elt_length_mom_;
  77 #endif
  78 }
  79
  80 void
  81 Request_chord_iterator::do_process_and_next (Moment mom)
  82 {
  83   if (first_b_)
  84     {
  85       for (Cons<Music> *i = elt_l ()->music_p_list_p_->head_; i; i = i->next_)
  86         {
  87           if (Request * req_l = dynamic_cast<Request*> (i->car_))
  88             {
  89               bool gotcha = report_to_l()->try_music (req_l);
  90               if (!gotcha)
  91                 req_l->warning (_f ("junking request: `%s\'", classname( req_l)));
  92             }
  93           else
  94             i->car_->warning (_f ("Huh? Not a Request: `%s\'",
  95                                    classname (i->car_)));
  96         }
  97       first_b_ = false;
  98     }
  99
 100   if (mom >= elt_length_mom_)
 101     last_b_ = true;
 102 }