lily/percent-repeat-item.cc

   1 /*
   2   percent-repeat-item.cc --  implement Percent_repeat_item_interface
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2001--2004  Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9 #include <math.h>
  10
  11 #include "grob.hh"
  12 #include "lookup.hh"
  13 #include "stencil.hh"
  14 #include "font-interface.hh"
  15 #include "font-metric.hh"
  16 #include "percent-repeat-item.hh"
  17
  18
  19 Stencil
  20 Percent_repeat_item_interface::brew_slash ( Grob *me)
  21 {
  22   Real slope = robust_scm2double (me->get_property ("slope"), 1);
  23   Real wid = 2.0 / slope;
  24
  25   /*
  26     todo: check out if in staff-rule thickness normally.
  27    */
  28   Real thick = robust_scm2double (me->get_property ("thickness"), 1);
  29   Stencil m = Lookup::repeat_slash (wid, slope, thick);
  30   m.translate_axis (-m.extent (Y_AXIS).center (), Y_AXIS);
  31   return m;
  32 }
  33
  34 /*
  35   todo: use grob props for dot_neg_kern, slash_neg_kern?
  36  */
  37 Stencil
  38 Percent_repeat_item_interface::x_percent (Grob *me, int count,
  39                                           Real dot_neg_kern,
  40                                           Real slash_neg_kern)
  41 {
  42   Stencil m ;
  43   Stencil s = brew_slash (me);
  44
  45   for (int i  = count; i--;)
  46     {
  47       m.add_at_edge (X_AXIS, RIGHT, s, -slash_neg_kern,0);
  48     }
  49   Stencil d1 = Font_interface::get_default_font (me)->find_by_name ("dots-dot");
  50   Stencil d2  =  d1;
  51   d1.translate_axis (0.5, Y_AXIS );
  52   d2.translate_axis (-0.5, Y_AXIS);
  53
  54   m.add_at_edge (X_AXIS, LEFT, d1, -dot_neg_kern,0);
  55   m.add_at_edge (X_AXIS, RIGHT, d2, -dot_neg_kern,0);
  56
  57   return m;
  58 }
  59
  60 MAKE_SCHEME_CALLBACK (Percent_repeat_item_interface,double_percent,1);
  61 SCM
  62 Percent_repeat_item_interface::double_percent (SCM grob)
  63 {
  64   Grob *me = unsmob_grob (grob);
  65   Stencil m = x_percent (me, 2, 0.75, 1.6);
  66   m.translate_axis (- m.extent (X_AXIS).center (), X_AXIS);
  67   return m.smobbed_copy ();
  68 }
  69
  70 MAKE_SCHEME_CALLBACK (Percent_repeat_item_interface,beat_slash,1);
  71 SCM
  72 Percent_repeat_item_interface::beat_slash (SCM grob)
  73 {
  74   Grob *me = unsmob_grob (grob);
  75   Stencil m = brew_slash (me);
  76
  77   return m.smobbed_copy ();
  78 }
  79
  80 ADD_INTERFACE (Percent_repeat_item_interface,"percent-repeat-interface",
  81   "Repeats that look like percent signs",
  82   "slope thickness");
  83
  84
  85