lily/clef.cc

   1
   2 /*
   3   clef.cc -- implement Clef_item
   4
   5   source file of the GNU LilyPond music typesetter
   6
   7   (c)  1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   8 */
   9
  10
  11 #include "clef.hh"
  12 #include "string.hh"
  13 #include "molecule.hh"
  14 #include "item.hh"
  15 #include "font-interface.hh"
  16
  17 /*
  18  FIXME: should use symbol for #'style.
  19 */
  20 MAKE_SCHEME_CALLBACK (Clef,before_line_breaking,1);
  21 SCM
  22 Clef::before_line_breaking (SCM smob)
  23 {
  24   Item * s = unsmob_item (smob);
  25
  26   SCM glyph = s->get_grob_property ("glyph-name");
  27
  28   if (gh_string_p (glyph))
  29     {
  30       String str = ly_scm2string (glyph);
  31
  32       if (to_boolean (s->get_grob_property ("non-default"))
  33           && s->break_status_dir () != RIGHT
  34           && !to_boolean (s->get_grob_property ("full-size-change")))
  35         {
  36           str += "_change";
  37           s->set_grob_property ("glyph-name", ly_str02scm (str.ch_C ()));
  38         }
  39     }
  40   else
  41     {
  42       s->suicide ();
  43       return SCM_UNSPECIFIED;
  44     }
  45
  46   return SCM_UNSPECIFIED;
  47 }
  48
  49 bool
  50 Clef::has_interface (Grob* me)
  51 {
  52   return me->has_interface (ly_symbol2scm ("clef-interface"));
  53 }
  54
  55
  56 void
  57 Clef::set_interface (Grob* me)
  58 {
  59   me->set_interface (ly_symbol2scm ("clef-interface"));
  60 }
  61
  62 MAKE_SCHEME_CALLBACK (Clef,brew_molecule,1)
  63 SCM
  64 Clef::brew_molecule (SCM smob)
  65 {
  66   Grob * sc = unsmob_grob (smob);
  67   SCM glyph = sc->get_grob_property ("glyph-name");
  68   if (gh_string_p (glyph))
  69     {
  70       return Font_interface::get_default_font (sc)->find_by_name (String (ly_scm2string (glyph))).smobbed_copy ();
  71     }
  72   else
  73     {
  74       return SCM_EOL;
  75     }
  76 }