lily/piano-pedal-bracket.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2003--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 "stencil.hh"
  21 #include "spanner.hh"
  22 #include "item.hh"
  23 #include "tuplet-bracket.hh"
  24
  25 struct Piano_pedal_bracket
  26 {
  27   DECLARE_SCHEME_CALLBACK (print, (SCM));
  28   DECLARE_GROB_INTERFACE ();
  29 };
  30
  31 MAKE_SCHEME_CALLBACK (Piano_pedal_bracket, print, 1);
  32 SCM
  33 Piano_pedal_bracket::print (SCM smob)
  34 {
  35   Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
  36   Spanner *orig = dynamic_cast<Spanner *> (me->original ());
  37
  38   Drul_array<bool> broken (false, false);
  39   Drul_array<Real> height = robust_scm2drul
  40     (me->get_property ("edge-height"), Interval (0, 0));
  41   Drul_array<Real> shorten = robust_scm2drul
  42     (me->get_property ("shorten-pair"), Interval (0, 0));
  43   Drul_array<Real> flare = robust_scm2drul
  44     (me->get_property ("bracket-flare"), Interval (0, 0));
  45
  46   Grob *common = me->get_bound (LEFT)
  47     ->common_refpoint (me->get_bound (RIGHT), X_AXIS);
  48   Grob *textbit = unsmob_grob (me->get_object ("pedal-text"));
  49
  50   if (textbit)
  51     common = common->common_refpoint (textbit, X_AXIS);
  52
  53   Interval span_points (0, 0);
  54   Direction d = LEFT;
  55   do
  56     {
  57       Item *b = me->get_bound (d);
  58       broken[d] = b->break_status_dir () != CENTER;
  59       if (broken[d])
  60         {
  61           if (orig
  62               && ((d == RIGHT
  63                    && me->get_break_index () != orig->broken_intos_.size () - 1)
  64                   || (d == LEFT && me->get_break_index ())))
  65             height[d] = 0.0;
  66           else
  67             flare[d] = 0.0;
  68         }
  69
  70       Interval ext = robust_relative_extent (b, common, X_AXIS);
  71       span_points[d] = ext [broken[d] ? RIGHT : LEFT];
  72     }
  73   while (flip (&d) != LEFT);
  74
  75   /* For 'Mixed' style pedals, i.e.  a bracket preceded by text:  Ped._____|
  76      need to shorten by the extent of the text grob
  77   */
  78   if (textbit)
  79     {
  80       height[LEFT] = 0;
  81
  82       Real padding = robust_scm2double (me->get_property ("bound-padding"), 0);
  83
  84       span_points[LEFT] = padding
  85         + robust_relative_extent (textbit, common, X_AXIS)[RIGHT];
  86     }
  87
  88   Stencil m;
  89   if (!span_points.is_empty ()
  90       && span_points.length () > 0.001)
  91     {
  92       m = Tuplet_bracket::make_bracket (me, Y_AXIS,
  93                                         Offset (span_points.length (), 0),
  94                                         height,
  95                                         Interval (),
  96                                         flare, shorten);
  97     }
  98   m.translate_axis (span_points[LEFT]
  99                     - me->relative_coordinate (common, X_AXIS), X_AXIS);
 100   return m.smobbed_copy ();
 101 }
 102
 103 ADD_INTERFACE (Piano_pedal_bracket,
 104                "The bracket of the piano pedal.  It can be tuned through"
 105                " the regular bracket properties.",
 106
 107                /* properties */
 108                "bound-padding "
 109                "edge-height "
 110                "shorten-pair "
 111                "bracket-flare "
 112                "pedal-text "
 113                );