lily/staff-collecting-engraver.cc

   1 /*
   2   staff-collecting-engraver.cc -- implement Staff_collecting_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2001--2006  Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "staff-symbol.hh"
  10 #include "engraver.hh"
  11 #include "grob.hh"
  12 #include "context.hh"
  13
  14 class Staff_collecting_engraver : public Engraver
  15 {
  16 public:
  17   TRANSLATOR_DECLARATIONS (Staff_collecting_engraver);
  18   DECLARE_ACKNOWLEDGER (staff_symbol);
  19   DECLARE_END_ACKNOWLEDGER (staff_symbol);
  20 };
  21
  22 Staff_collecting_engraver::Staff_collecting_engraver ()
  23 {
  24 }
  25
  26 void
  27 Staff_collecting_engraver::acknowledge_staff_symbol (Grob_info gi)
  28 {
  29   SCM staffs = get_property ("stavesFound");
  30   staffs = scm_cons (gi.grob ()->self_scm (), staffs);
  31
  32   context ()->set_property ("stavesFound", staffs);
  33 }
  34
  35 void
  36 Staff_collecting_engraver::acknowledge_end_staff_symbol (Grob_info gi)
  37 {
  38   SCM staffs = get_property ("stavesFound");
  39   staffs = scm_delq (gi.grob ()->self_scm (), staffs);
  40
  41   context ()->set_property ("stavesFound", staffs);
  42 }
  43
  44 #include "translator.icc"
  45
  46 ADD_ACKNOWLEDGER (Staff_collecting_engraver, staff_symbol);
  47 ADD_END_ACKNOWLEDGER (Staff_collecting_engraver, staff_symbol);
  48
  49 ADD_TRANSLATOR (Staff_collecting_engraver,
  50                 /* doc */ "Maintain the stavesFound variable",
  51
  52                 /* create */ "",
  53                 /* read */ "stavesFound",
  54                 /* write */ "stavesFound");