lily/percent-repeat-item.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2001--2011  Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "percent-repeat-item.hh"
  21
  22 #include "item.hh"
  23 #include "font-interface.hh"
  24 #include "lookup.hh"
  25 #include "stream-event.hh"
  26
  27 Stencil
  28 Percent_repeat_item_interface::brew_slash (Grob *me, int count)
  29 {
  30   Real slope = robust_scm2double (me->get_property ("slope"), 1);
  31   Real wid = 2.0 / slope;
  32
  33   /*
  34     todo: check out if in staff-rule thickness normally.
  35   */
  36   Real thick = robust_scm2double (me->get_property ("thickness"), 1);
  37   Stencil slash = Lookup::repeat_slash (wid, slope, thick);
  38   Stencil m = slash;
  39
  40   Real slash_neg_kern =
  41     robust_scm2double (me->get_property ("slash-negative-kern"), 1.6);
  42   for (int i = count - 1; i--;)
  43     m.add_at_edge (X_AXIS, RIGHT, slash, -slash_neg_kern);
  44
  45   m.translate_axis (-m.extent (Y_AXIS).center (), Y_AXIS);
  46   return m;
  47 }
  48
  49 Stencil
  50 Percent_repeat_item_interface::x_percent (Grob *me, int count)
  51 {
  52   Stencil m = brew_slash (me, count);
  53
  54   Real dot_neg_kern =
  55     robust_scm2double (me->get_property ("dot-negative-kern"), 0.75);
  56
  57   Stencil d1 = Font_interface::get_default_font (me)->find_by_name ("dots.dot");
  58   Stencil d2 = d1;
  59   d1.translate_axis (0.5, Y_AXIS);
  60   d2.translate_axis (-0.5, Y_AXIS);
  61
  62   m.add_at_edge (X_AXIS, LEFT, d1, -dot_neg_kern);
  63   m.add_at_edge (X_AXIS, RIGHT, d2, -dot_neg_kern);
  64
  65   return m;
  66 }
  67
  68 MAKE_SCHEME_CALLBACK (Percent_repeat_item_interface, double_percent, 1);
  69 SCM
  70 Percent_repeat_item_interface::double_percent (SCM grob)
  71 {
  72   Grob *me = unsmob_grob (grob);
  73   Stencil m = x_percent (me, 2);
  74   m.translate_axis (-m.extent (X_AXIS).center (), X_AXIS);
  75   return m.smobbed_copy ();
  76 }
  77
  78 MAKE_SCHEME_CALLBACK (Percent_repeat_item_interface, beat_slash, 1);
  79 SCM
  80 Percent_repeat_item_interface::beat_slash (SCM grob)
  81 {
  82   Grob *me = unsmob_grob (grob);
  83   Stream_event *cause = unsmob_stream_event (me->get_property ("cause"));
  84   int count = robust_scm2int (cause->get_property ("slash-count"), 1);
  85
  86   Stencil m;
  87   if (count == 0)
  88     m = x_percent (me, 2);
  89   else
  90     m = brew_slash (me, count);
  91
  92   return m.smobbed_copy ();
  93 }
  94
  95 ADD_INTERFACE (Percent_repeat_item_interface,
  96                "Repeats that look like percent signs.",
  97
  98                /* properties */
  99                "dot-negative-kern "
 100                "slash-negative-kern "
 101                "slope "
 102                "thickness "
 103                );