lily/simple-music-iterator.cc

   1 /*
   2   simple-music-iterator.cc --  implement Simple_music_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "simple-music-iterator.hh"
  11 #include "music.hh"
  12 #include "input.hh"
  13
  14 Simple_music_iterator::Simple_music_iterator ()
  15   : Music_iterator ()
  16 {
  17   last_processed_mom_ = -1;
  18 }
  19
  20 Simple_music_iterator::Simple_music_iterator (Simple_music_iterator const &src)
  21   : Music_iterator (src)
  22 {
  23   last_processed_mom_ = src.last_processed_mom_;
  24 }
  25
  26 bool
  27 Simple_music_iterator::ok ()const
  28 {
  29   return last_processed_mom_ < music_get_length ();
  30 }
  31
  32 /*
  33   TODO: remove last_processed_mom_, and the complete shit.  We should
  34   only process a simple-music once, and that is at its start.
  35
  36   Engravers can detect and event the end-moments to be processed as
  37   well.
  38
  39 */
  40 Moment
  41 Simple_music_iterator::pending_moment ()const
  42 {
  43   if (last_processed_mom_ < Moment (0))
  44     return Moment (0);
  45   else
  46     return music_get_length ();
  47 }
  48
  49 void
  50 Simple_music_iterator::skip (Moment m)
  51 {
  52   /*
  53     docme??!!
  54
  55     uncommented because setting MUSIC_L_ = 0 causes core dumps with
  56     grace notes.  */
  57
  58   //  music_ = 0;
  59
  60   last_processed_mom_ = m;
  61 }
  62
  63 void
  64 Simple_music_iterator::process (Moment m)
  65 {
  66   /*
  67   don't do try_music (), since it would make the function useless for
  68   base classes */
  69
  70   skip (m);
  71 }
  72
  73 IMPLEMENT_CTOR_CALLBACK (Simple_music_iterator);