lily/sustain-pedal.cc

   1 /*
   2   sustain-pedal.cc -- implement Sustain_pedal
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8 #include "grob.hh"
   9 #include "stencil.hh"
  10 #include "font-interface.hh"
  11
  12 // update comment --hwn
  13 /*
  14   Urg.
  15   This is almost text
  16   Problem is:
  17   * we have no kerning
  18   * symbols are at wrong place in font
  19
  20
  21
  22   Properties:
  23
  24   glyph -- text string (TODO: make one large glyph of the Ped symbol, removes need for member_print ())
  25 */
  26
  27 /*
  28   FIXME. Need to use markup.
  29 */
  30 struct Sustain_pedal
  31 {
  32 public:
  33   DECLARE_SCHEME_CALLBACK (print, (SCM));
  34 };
  35
  36 MAKE_SCHEME_CALLBACK (Sustain_pedal, print, 1);
  37 SCM
  38 Sustain_pedal::print (SCM smob)
  39 {
  40   Grob *e = unsmob_grob (smob);
  41
  42   Stencil mol;
  43   SCM glyph = e->get_property ("text");
  44   if (!scm_is_string (glyph))
  45     return mol.smobbed_copy ();
  46
  47   string text = ly_scm2string (glyph);
  48
  49   for (ssize i = 0; i < text.length (); i++)
  50     {
  51       string idx ("pedal.");
  52       if (text.substr (i, 3) == "Ped")
  53         {
  54           idx += "Ped";
  55           i += 2;
  56         }
  57       else
  58         idx += string (&text.c_str ()[i], 1);
  59       Stencil m = Font_interface::get_default_font (e)->find_by_name (idx);
  60       if (!m.is_empty ())
  61         mol.add_at_edge (X_AXIS, RIGHT, m, 0);
  62     }
  63
  64   return mol.smobbed_copy ();
  65 }
  66