lily/vertically-spaced-context-engraver.cc

   1 /*
   2   vertically-spaced-contexts-engraver.cc -- implement Vertically_spaced_contexts_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2005--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "engraver.hh"
  10 #include "grob.hh"
  11 #include "axis-group-interface.hh"
  12 #include "context.hh"
  13 #include "pointer-group-interface.hh"
  14
  15 class Vertically_spaced_contexts_engraver : public Engraver
  16 {
  17   TRANSLATOR_DECLARATIONS (Vertically_spaced_contexts_engraver);
  18 protected:
  19   virtual void initialize ();
  20   DECLARE_ACKNOWLEDGER (vertically_spaceable);
  21
  22 private:
  23   Grob *system_;
  24 };
  25
  26 Vertically_spaced_contexts_engraver::Vertically_spaced_contexts_engraver ()
  27 {
  28   system_ = 0;
  29 }
  30
  31 void
  32 Vertically_spaced_contexts_engraver::initialize ()
  33 {
  34   system_ = unsmob_grob (get_property ("rootSystem"));
  35 }
  36
  37 void
  38 Vertically_spaced_contexts_engraver::acknowledge_vertically_spaceable (Grob_info gi)
  39 {
  40   if (Axis_group_interface::has_interface (gi.grob ()))
  41     {
  42       SCM spaceable = get_property ("verticallySpacedContexts");
  43       Context *orig = gi.origin_contexts (this)[0];
  44
  45       if (scm_memq (ly_symbol2scm (orig->context_name ().c_str ()),
  46                     spaceable) != SCM_BOOL_F)
  47         {
  48           Pointer_group_interface::add_unordered_grob (system_,
  49                                                        ly_symbol2scm ("spaceable-staves"),
  50                                                        gi.grob ());
  51         }
  52     }
  53 }
  54
  55 #include "translator.icc"
  56
  57 ADD_ACKNOWLEDGER (Vertically_spaced_contexts_engraver, vertically_spaceable);
  58 ADD_TRANSLATOR (Vertically_spaced_contexts_engraver,
  59                 /* doc */
  60                 "",
  61
  62                 /* create */
  63                 "",
  64
  65                 /* read */
  66                 "verticallySpacedContexts ",
  67
  68                 /* write */
  69                 "verticallySpacedContexts "
  70                 );