lily/enclosing-bracket.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6
   7   LilyPond is free software: you can redistribute it and/or modify
   8   it under the terms of the GNU General Public License as published by
   9   the Free Software Foundation, either version 3 of the License, or
  10   (at your option) any later version.
  11
  12   LilyPond is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "stencil.hh"
  22 #include "horizontal-bracket.hh"
  23 #include "grob.hh"
  24 #include "axis-group-interface.hh"
  25 #include "pointer-group-interface.hh"
  26
  27 struct Enclosing_bracket
  28 {
  29   DECLARE_GROB_INTERFACE ();
  30
  31 public:
  32   DECLARE_SCHEME_CALLBACK (print, (SCM));
  33   DECLARE_SCHEME_CALLBACK (width, (SCM));
  34 };
  35
  36
  37 ADD_INTERFACE (Enclosing_bracket,
  38               "Brackets alongside bass figures.",
  39
  40               /* properties */
  41               "bracket-flare "
  42               "edge-height "
  43               "elements "
  44               "padding "
  45               "shorten-pair "
  46               "thickness "
  47               );
  48
  49 /* ugh: should make bracket interface. */
  50
  51
  52 MAKE_SCHEME_CALLBACK (Enclosing_bracket, width, 1);
  53 SCM
  54 Enclosing_bracket::width (SCM grob)
  55 {
  56   /*
  57      UGH. cut & paste code.
  58   */
  59   Grob *me = unsmob_grob (grob);
  60   extract_grob_set (me, "elements", elements);
  61   if (elements.empty ())
  62     {
  63       me->suicide ();
  64       return SCM_EOL;
  65     }
  66
  67   Grob *common_x = common_refpoint_of_array (elements, me, X_AXIS);
  68   Interval xext = Axis_group_interface::relative_group_extent (elements, common_x, X_AXIS);
  69
  70   Stencil left_br = Horizontal_bracket::make_bracket (me, 10.0, Y_AXIS, LEFT);
  71   Stencil right_br = Horizontal_bracket::make_bracket (me, 10.0, Y_AXIS, LEFT);
  72
  73
  74   xext.widen (robust_scm2double (me->get_property ("padding"), 0.25));
  75   left_br.translate_axis (xext[LEFT], X_AXIS);
  76   right_br.translate_axis (xext[RIGHT], X_AXIS);
  77
  78   left_br.add_stencil (right_br);
  79   left_br.translate_axis (-me->relative_coordinate (common_x, X_AXIS), X_AXIS);
  80
  81   return ly_interval2scm (left_br.extent (X_AXIS));
  82 }
  83
  84 MAKE_SCHEME_CALLBACK (Enclosing_bracket, print, 1);
  85 SCM
  86 Enclosing_bracket::print (SCM grob)
  87 {
  88   Grob *me = unsmob_grob (grob);
  89   extract_grob_set (me, "elements", elements);
  90   if (elements.empty ())
  91     {
  92       me->suicide ();
  93       return SCM_EOL;
  94     }
  95
  96   Grob *common_x = common_refpoint_of_array (elements, me, X_AXIS);
  97   Interval xext = Axis_group_interface::relative_group_extent (elements, common_x, X_AXIS);
  98   if (xext.is_empty ())
  99     {
 100       me->programming_error ("elements have no X extent.");
 101       xext = Interval (0, 0);
 102     }
 103
 104   Stencil left_br = Horizontal_bracket::make_enclosing_bracket (me, me, elements,
 105                                                                 Y_AXIS, LEFT);
 106   Stencil right_br = Horizontal_bracket::make_enclosing_bracket (me, me, elements,
 107                                                                  Y_AXIS, RIGHT);
 108
 109   xext.widen (robust_scm2double (me->get_property ("padding"), 0.25));
 110   left_br.translate_axis (xext[LEFT], X_AXIS);
 111   right_br.translate_axis (xext[RIGHT], X_AXIS);
 112
 113   left_br.add_stencil (right_br);
 114   left_br.translate_axis (-me->relative_coordinate (common_x, X_AXIS), X_AXIS);
 115
 116   return left_br.smobbed_copy ();
 117 }
 118