lily/clef.cc

   1 /*
   2   clef.cc -- implement Clef_item
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "clef.hh"
  10 #include "string.hh"
  11 #include "molecule.hh"
  12 #include "item.hh"
  13 #include "font-interface.hh"
  14
  15 /*
  16  FIXME: should use symbol for #'style.
  17 */
  18 MAKE_SCHEME_CALLBACK (Clef,before_line_breaking,1);
  19 SCM
  20 Clef::before_line_breaking (SCM smob)
  21 {
  22   Item *s = unsmob_item (smob);
  23
  24   SCM glyph = s->get_grob_property ("glyph-name");
  25
  26   if (gh_string_p (glyph))
  27     {
  28       String str = ly_scm2string (glyph);
  29
  30       if (to_boolean (s->get_grob_property ("non-default"))
  31           && s->break_status_dir () != RIGHT
  32           && !to_boolean (s->get_grob_property ("full-size-change")))
  33         {
  34           str += "_change";
  35           s->set_grob_property ("glyph-name", scm_makfrom0str (str.to_str0 ()));
  36         }
  37     }
  38   else
  39     {
  40       s->suicide ();
  41       return SCM_UNSPECIFIED;
  42     }
  43
  44   return SCM_UNSPECIFIED;
  45 }
  46
  47
  48
  49
  50 MAKE_SCHEME_CALLBACK (Clef,brew_molecule,1)
  51 SCM
  52 Clef::brew_molecule (SCM smob)
  53 {
  54   Grob *me = unsmob_grob (smob);
  55   SCM glyph_scm = me->get_grob_property ("glyph-name");
  56   if (!gh_string_p (glyph_scm))
  57     return SCM_EOL;
  58
  59   String glyph = String (ly_scm2string (glyph_scm));
  60   Font_metric *fm = Font_interface::get_default_font (me);
  61   Molecule out = fm->find_by_name (glyph);
  62   if (out.empty_b())
  63     {
  64       me->warning (_f ("clef `%s' not found", glyph.to_str0 ()));
  65     }
  66   return out.smobbed_copy ();
  67 }
  68
  69
  70 ADD_INTERFACE (Clef, "clef-interface",
  71   "A clef sign",
  72   "non-default full-size-change glyph-name");
  73