lily/script.cc

   1 /*
   2   script.cc --  implement Script
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "debug.hh"
  11 #include "script.hh"
  12 #include "font-interface.hh"
  13 #include "side-position-interface.hh"
  14 #include "paper-def.hh"
  15 #include "item.hh"
  16 #include "molecule.hh"
  17 #include "lookup.hh"
  18
  19 Molecule
  20 Script::get_molecule (Grob * me, Direction d)
  21 {
  22   SCM s = me->get_grob_property ("molecule");
  23   assert (gh_pair_p (s));
  24
  25   SCM key = gh_car (s);
  26   if (key == ly_symbol2scm ("feta"))
  27     {
  28       return Font_interface::get_default_font (me)->find_by_name ("scripts-" +
  29                                     ly_scm2string (index_cell (gh_cdr (s), d)));
  30     }
  31   else if (key == ly_symbol2scm ("accordion"))
  32     {
  33       return Lookup::accordion (gh_cdr (s), 1.0, Font_interface::get_default_font (me));
  34     }
  35   else
  36     assert (false);
  37
  38   return Molecule ();
  39 }
  40
  41 MAKE_SCHEME_CALLBACK (Script,before_line_breaking,1);
  42 SCM
  43 Script::before_line_breaking (SCM smob)
  44 {
  45   Grob * me = unsmob_grob (smob);
  46
  47   Direction d = Side_position_interface::get_direction (me);
  48
  49   if (!d)
  50     {
  51   /*
  52     we should not have `arbitrary' directions.
  53    */
  54       programming_error ("Script direction not yet known!");
  55       d = DOWN;
  56     }
  57
  58   Side_position_interface::set_direction (me,d);
  59
  60   return SCM_UNSPECIFIED;
  61 }
  62
  63
  64 MAKE_SCHEME_CALLBACK (Script,brew_molecule,1);
  65
  66 SCM
  67 Script::brew_molecule (SCM smob)
  68 {
  69   Grob *me= unsmob_grob (smob);
  70
  71   Direction dir = Side_position_interface::get_direction (me);
  72   if (!dir)
  73     {
  74       programming_error ("Script direction not known, but molecule wanted.");
  75       dir= DOWN;
  76     }
  77
  78   return get_molecule (me, dir).smobbed_copy ();
  79 }
  80
  81 bool
  82 Script::has_interface (Grob*me)
  83 {
  84   return me->has_interface (ly_symbol2scm ("script-interface"));
  85 }
  86
  87 void
  88 Script::set_interface (Grob*me)
  89 {
  90   return me->set_interface (ly_symbol2scm ("script-interface"));
  91 }
  92