lily/apply-context-iterator.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2004--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "context.hh"
  21 #include "input.hh"
  22 #include "international.hh"
  23 #include "music.hh"
  24 #include "simple-music-iterator.hh"
  25
  26 class Apply_context_iterator : public Simple_music_iterator
  27 {
  28 public:
  29   DECLARE_SCHEME_CALLBACK (constructor, ());
  30 protected:
  31   virtual void process (Moment);
  32 };
  33
  34 void
  35 Apply_context_iterator::process (Moment m)
  36 {
  37   SCM proc = get_music ()->get_property ("procedure");
  38
  39   if (ly_is_procedure (proc))
  40     scm_call_1 (proc, get_outlet ()->self_scm ());
  41   else
  42     get_music ()->origin ()->warning (_ ("\\applycontext argument is not a procedure"));
  43
  44   Simple_music_iterator::process (m);
  45 }
  46
  47 IMPLEMENT_CTOR_CALLBACK (Apply_context_iterator);
  48