lily/staff-collecting-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2001--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 "staff-symbol.hh"
  21 #include "engraver.hh"
  22 #include "grob.hh"
  23 #include "context.hh"
  24
  25 class Staff_collecting_engraver : public Engraver
  26 {
  27 public:
  28   TRANSLATOR_DECLARATIONS (Staff_collecting_engraver);
  29   DECLARE_ACKNOWLEDGER (staff_symbol);
  30   DECLARE_END_ACKNOWLEDGER (staff_symbol);
  31 };
  32
  33 Staff_collecting_engraver::Staff_collecting_engraver ()
  34 {
  35 }
  36
  37 void
  38 Staff_collecting_engraver::acknowledge_staff_symbol (Grob_info gi)
  39 {
  40   SCM staffs = get_property ("stavesFound");
  41   staffs = scm_cons (gi.grob ()->self_scm (), staffs);
  42
  43   context ()->set_property ("stavesFound", staffs);
  44 }
  45
  46 void
  47 Staff_collecting_engraver::acknowledge_end_staff_symbol (Grob_info gi)
  48 {
  49   SCM staffs = get_property ("stavesFound");
  50   staffs = scm_delq (gi.grob ()->self_scm (), staffs);
  51
  52   context ()->set_property ("stavesFound", staffs);
  53 }
  54
  55 #include "translator.icc"
  56
  57 ADD_ACKNOWLEDGER (Staff_collecting_engraver, staff_symbol);
  58 ADD_END_ACKNOWLEDGER (Staff_collecting_engraver, staff_symbol);
  59
  60 ADD_TRANSLATOR (Staff_collecting_engraver,
  61                 /* doc */
  62                 "Maintain the @code{stavesFound} variable.",
  63
  64                 /* create */
  65                 "",
  66
  67                 /* read */
  68                 "stavesFound ",
  69
  70                 /* write */
  71                 "stavesFound "
  72                 );