lily/dots.cc

   1 /*
   2   dots.cc -- implement Dots
   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 "dots.hh"
  10 #include "item.hh"
  11 #include "molecule.hh"
  12 #include "paper-def.hh"
  13 #include "lookup.hh"
  14 #include "staff-symbol-referencer.hh"
  15 #include "directional-element-interface.hh"
  16
  17 MAKE_SCHEME_SCORE_ELEMENT_CALLBACK(Dots,after_line_breaking);
  18
  19 SCM
  20 Dots::after_line_breaking (SCM smob)
  21 {
  22   Item * p = dynamic_cast<Item*> (unsmob_element (smob));
  23
  24   SCM d= p->get_elt_property ("dot-count");
  25   if (gh_number_p (d) && gh_scm2int (d))
  26     {
  27       if (!Directional_element_interface (p).get ())
  28         Directional_element_interface (p).set (UP);
  29
  30       Staff_symbol_referencer_interface si (p);
  31       int pos = int (si.position_f ());
  32       if (!(pos % 2))
  33         si.set_position (pos  + Directional_element_interface (p).get ());
  34     }
  35
  36   return SCM_UNDEFINED;
  37 }
  38
  39 MAKE_SCHEME_SCORE_ELEMENT_CALLBACK(Dots,brew_molecule);
  40
  41 SCM
  42 Dots::brew_molecule (SCM d)
  43 {
  44   Score_element *sc = unsmob_element (d);
  45   Molecule mol (sc->lookup_l ()->blank (Box (Interval (0,0),
  46                                          Interval (0,0))));
  47
  48   SCM c = sc->get_elt_property ("dot-count");
  49   if (gh_number_p (c))
  50     {
  51       Molecule d = sc->lookup_l ()->afm_find (String ("dots-dot"));
  52
  53       Real dw = d.extent (X_AXIS).length ();
  54       d.translate_axis (-dw, X_AXIS);
  55
  56
  57       for (int i = gh_scm2int (c); i--; )
  58         {
  59           d.translate_axis (2*dw,X_AXIS);
  60           mol.add_molecule (d);
  61         }
  62     }
  63   return mol.create_scheme ();
  64 }
  65
  66
  67