lily/hara-kiri-engraver.cc

   1 /*
   2   hara-kiri-engraver.cc --  implement Hara_kiri_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "axis-group-engraver.hh"
  10 #include "hara-kiri-group-spanner.hh"
  11 #include "rhythmic-head.hh"
  12 #include "spanner.hh"
  13
  14 #include "translator.icc"
  15
  16 /*
  17   TODO: fold together with axis_group_engraver?
  18  */
  19
  20 class Hara_kiri_engraver : public Axis_group_engraver
  21 {
  22 protected:
  23   virtual Spanner *get_spanner ();
  24   DECLARE_ACKNOWLEDGER (grob);
  25   virtual void add_element (Grob *e);
  26   void process_music ();
  27   virtual void derived_mark () const;
  28   SCM interesting_;
  29 public:
  30   TRANSLATOR_DECLARATIONS (Hara_kiri_engraver);
  31 };
  32
  33
  34 Hara_kiri_engraver::Hara_kiri_engraver ()
  35 {
  36   interesting_ = SCM_EOL;
  37 }
  38
  39 void
  40 Hara_kiri_engraver::derived_mark () const
  41 {
  42   scm_gc_mark (interesting_);
  43 }
  44
  45 void
  46 Hara_kiri_engraver::process_music ()
  47 {
  48   Axis_group_engraver::process_music ();
  49   interesting_ = get_property ("keepAliveInterfaces");
  50 }
  51
  52 void
  53 Hara_kiri_engraver::add_element (Grob *e)
  54 {
  55   Axis_group_engraver::add_element (e);
  56 }
  57
  58 Spanner *
  59 Hara_kiri_engraver::get_spanner ()
  60 {
  61   Spanner *sp = make_spanner ("VerticalAxisGroup", SCM_EOL);
  62   return sp;
  63 }
  64
  65 void
  66 Hara_kiri_engraver::acknowledge_grob (Grob_info i)
  67 {
  68   Axis_group_engraver::acknowledge_grob (i);
  69   if (staffline_)
  70     {
  71       for (SCM s = interesting_; scm_is_pair (s); s = scm_cdr (s))
  72         {
  73           if (i.grob ()->internal_has_interface (scm_car (s)))
  74             Hara_kiri_group_spanner::add_interesting_item (staffline_, i.grob ());
  75         }
  76     }
  77 }
  78
  79
  80 ADD_ACKNOWLEDGER (Hara_kiri_engraver, grob);
  81 ADD_TRANSLATOR (Hara_kiri_engraver,
  82                 /* doc */ "Like Axis_group_engraver, but make a hara-kiri spanner, and add "
  83                 "interesting items (ie. note heads, lyric syllables and normal rests) ",
  84                 /* create */ "VerticalAxisGroup",
  85                 /* accept */ "",
  86                 /* read */ "keepAliveInterfaces",
  87                 /* write */ "");
  88