lily/apply-context-iterator.cc

   1 /*
   2   apply-context-iterator.cc -- implement Apply_context_iterator
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2004--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 class Apply_context_iterator : public Simple_music_iterator
  16 {
  17 public:
  18   DECLARE_SCHEME_CALLBACK (constructor, ());
  19 protected:
  20   virtual void process (Moment);
  21 };
  22
  23 void
  24 Apply_context_iterator::process (Moment m)
  25 {
  26   SCM proc = get_music ()->get_property ("procedure");
  27
  28   if (ly_is_procedure (proc))
  29     scm_call_1 (proc, get_outlet ()->self_scm ());
  30   else
  31     get_music ()->origin ()->warning (_ ("\\applycontext argument is not a procedure"));
  32
  33   Simple_music_iterator::process (m);
  34 }
  35
  36 IMPLEMENT_CTOR_CALLBACK (Apply_context_iterator);
  37