lily/context-specced-music-iterator.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2002--2011 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 "music-wrapper-iterator.hh"
  21 #include "context.hh"
  22 #include "music.hh"
  23
  24
  25 class Context_specced_music_iterator : public Music_wrapper_iterator
  26 {
  27 public:
  28   DECLARE_SCHEME_CALLBACK (constructor, ());
  29   virtual void construct_children ();
  30 };
  31
  32 void
  33 Context_specced_music_iterator::construct_children ()
  34 {
  35   SCM ct = get_music ()->get_property ("context-type");
  36
  37   string c_id;
  38   SCM ci = get_music ()->get_property ("context-id");
  39   if (scm_is_string (ci))
  40     c_id = ly_scm2string (ci);
  41   SCM ops = get_music ()->get_property ("property-operations");
  42
  43   Context *a = 0;
  44
  45   if (to_boolean (get_music ()->get_property ("create-new")))
  46     a = get_outlet ()->create_unique_context (ct, c_id, ops);
  47   else
  48     a = get_outlet ()->find_create_context (ct, c_id, ops);
  49
  50   if (a
  51       && to_boolean (get_music ()->get_property ("descend-only"))
  52       && !is_child_context (get_outlet (), a))
  53     a = 0;
  54
  55   if (a)
  56     set_context (a);
  57
  58   Music_wrapper_iterator::construct_children ();
  59 }
  60
  61 IMPLEMENT_CTOR_CALLBACK (Context_specced_music_iterator);