lily/bar.cc

   1 /*
   2   bar.cc -- implement Bar
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "dimension-cache.hh"
  10 #include "bar.hh"
  11 #include "string.hh"
  12 #include "molecule.hh"
  13 #include "paper-def.hh"
  14 #include "lookup.hh"
  15 #include "debug.hh"
  16
  17
  18 Bar::Bar ()
  19 {
  20   set_elt_property ("breakable", SCM_BOOL_T);
  21 }
  22
  23
  24 Real
  25 Bar::get_bar_size () const
  26 {
  27   // Never called!
  28   return 0;
  29 }
  30
  31
  32 Molecule*
  33 Bar::do_brew_molecule_p () const
  34 {
  35   String s = ly_scm2string (get_elt_property ("glyph"));
  36   Molecule *output
  37     = new Molecule (lookup_l ()->bar (s, get_bar_size (), paper_l ()));
  38
  39   return output;
  40 }
  41
  42
  43
  44 void
  45 Bar::do_pre_processing ()
  46 {
  47   SCM g = get_elt_property ("glyph");
  48   Direction bsd = break_status_dir ();
  49   if (gh_string_p (g))
  50     {
  51       if (bsd)
  52         {
  53           SCM breakdir = gh_int2scm (bsd);
  54           g = scm_eval (gh_list (ly_symbol2scm ("break-barline"),
  55                                  g,
  56                                  breakdir,
  57                                  SCM_UNDEFINED));
  58         }
  59     }
  60   else
  61     {
  62       g = SCM_UNDEFINED;
  63     }
  64
  65   if (!gh_string_p (g))
  66     {
  67       set_elt_property ("transparent", SCM_BOOL_T);
  68       set_empty (X_AXIS);
  69     }
  70   else
  71     set_elt_property ("glyph", g);
  72 }
  73
  74