lily/bar-check-iterator.cc

   1 /*
   2   bar-check-iterator.cc -- implement Bar_check_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2001--2009  Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "context.hh"
  10 #include "input.hh"
  11 #include "international.hh"
  12 #include "music.hh"
  13 #include "simple-music-iterator.hh"
  14
  15 /*
  16   Check bar checks. We do this outside the engravers so that you can
  17   race through the score using skipTypesetting to correct durations.
  18 */
  19 class Bar_check_iterator : Simple_music_iterator
  20 {
  21 public:
  22   virtual void process (Moment);
  23   Bar_check_iterator ();
  24   DECLARE_SCHEME_CALLBACK (constructor, ());
  25 };
  26
  27 IMPLEMENT_CTOR_CALLBACK (Bar_check_iterator);
  28
  29 Bar_check_iterator::Bar_check_iterator ()
  30 {
  31 }
  32
  33 void
  34 Bar_check_iterator::process (Moment m)
  35 {
  36   Simple_music_iterator::process (m);
  37   if (!m.to_bool ())
  38     {
  39       Context *tr = get_outlet ();
  40
  41       SCM check = tr->get_property ("ignoreBarChecks");
  42       if (to_boolean (check))
  43         return;
  44
  45       SCM mp = tr->get_property ("measurePosition");
  46       SCM sync = tr->get_property ("barCheckSynchronize");
  47
  48       Moment *where = unsmob_moment (mp);
  49       if (!where)
  50         return;
  51
  52       if (where->main_part_)
  53         {
  54           bool warn = true;
  55           if (to_boolean (sync))
  56             {
  57               SCM mp;
  58               tr = tr->where_defined (ly_symbol2scm ("measurePosition"), &mp);
  59               Moment zero;
  60               tr->set_property ("measurePosition", zero.smobbed_copy ());
  61             }
  62           else
  63             {
  64               SCM lf = tr->get_property ("barCheckLastFail");
  65               if (unsmob_moment (lf)
  66                   && *unsmob_moment (lf) == *where)
  67                 warn = false;
  68               else
  69                 tr->set_property ("barCheckLastFail", mp);
  70             }
  71
  72           if (warn)
  73             get_music ()->origin ()->warning (_f ("barcheck failed at: %s",
  74                                                   where->to_string ()));
  75         }
  76     }
  77 }