lily/horizontal-bracket.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2002--2010 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 "horizontal-bracket.hh"
  21
  22 #include "lookup.hh"
  23 #include "side-position-interface.hh"
  24 #include "pointer-group-interface.hh"
  25 #include "directional-element-interface.hh"
  26 #include "output-def.hh"
  27 #include "staff-symbol-referencer.hh"
  28 #include "tuplet-bracket.hh"
  29 #include "axis-group-interface.hh"
  30 #include "spanner.hh"
  31 #include "item.hh"
  32
  33
  34 Stencil
  35 Horizontal_bracket::make_bracket (Grob *me,
  36                                   Real length,
  37                                   Axis a, Direction dir)
  38 {
  39   Drul_array<Real> edge_height = robust_scm2interval (me->get_property ("edge-height"),
  40                                                       Interval (1.0, 1.0));
  41   Drul_array<Real> flare = robust_scm2interval (me->get_property ("bracket-flare"),
  42                                                 Interval (0, 0));
  43   Drul_array<Real> shorten = robust_scm2interval (me->get_property ("shorten-pair"),
  44                                                   Interval (0, 0));
  45
  46
  47   // Make sure that it points in the correct direction:
  48   scale_drul (&edge_height, Real (-dir));
  49
  50   Interval empty;
  51   Offset start;
  52   start[a] = length;
  53
  54   Drul_array<bool> connect_to_other =
  55     robust_scm2booldrul (me->get_property ("connect-to-neighbor"),
  56                          Drul_array<bool> (false, false));
  57
  58   Direction d = LEFT;
  59   do
  60     {
  61       if (connect_to_other[d])
  62         {
  63           edge_height[d] = 0.0;
  64           flare[d] = 0.0;
  65           shorten[d] = 0.0;
  66         }
  67     }
  68   while (flip (&d) != LEFT);
  69
  70   /*
  71     ugh, Tuplet_bracket should use Horizontal_bracket, not the other way around.
  72   */
  73   return Tuplet_bracket::make_bracket (me, other_axis (a), start,
  74                                        edge_height, empty, flare, shorten);
  75 }
  76
  77
  78 Stencil
  79 Horizontal_bracket::make_enclosing_bracket (Grob *me, Grob *refpoint,
  80                                             vector<Grob*> grobs,
  81                                             Axis a, Direction dir)
  82 {
  83   Grob *common = common_refpoint_of_array (grobs, refpoint, a);
  84   Interval ext = Axis_group_interface::relative_group_extent (grobs, common, a);
  85
  86   if (ext.is_empty ())
  87     {
  88       me->programming_error ("Can't enclose empty extents with bracket");
  89       return Stencil ();
  90     }
  91   else
  92     {
  93       Stencil b = make_bracket (me, ext.length (), a, dir);
  94       b.translate_axis (ext[LEFT] - refpoint->relative_coordinate (common, a), a);
  95
  96       return b;
  97     }
  98 }
  99
 100 /*
 101   TODO:
 102
 103   Support texts on the brackets?
 104 */
 105 MAKE_SCHEME_CALLBACK (Horizontal_bracket, print, 1);
 106 SCM
 107 Horizontal_bracket::print (SCM smob)
 108 {
 109   Spanner *me = unsmob_spanner (smob);
 110   extract_grob_set (me, "columns", gs);
 111
 112   vector<Grob*> enclosed = gs;
 113   if (!gs.size ())
 114     {
 115       me->suicide ();
 116       return SCM_EOL;
 117     }
 118
 119   Direction d = LEFT;
 120   do
 121     {
 122       Item *b = me->get_bound (d);
 123       if (b->break_status_dir ())
 124         enclosed.push_back (b);
 125     }
 126   while (flip (&d) != LEFT);
 127
 128   Stencil b = make_enclosing_bracket (me, me, enclosed, X_AXIS, get_grob_direction (me));
 129   return b.smobbed_copy ();
 130 }
 131
 132 ADD_INTERFACE (Horizontal_bracket,
 133                "A horizontal bracket encompassing notes.",
 134
 135                /* properties */
 136                "bracket-flare "
 137                "columns "
 138                "edge-height "
 139                "shorten-pair "
 140                "connect-to-neighbor "
 141                );
 142