lily/volta-bracket.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1997--2010 Jan Nieuwenhuizen <janneke@gnu.org>
   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 <cstring>
  21 using namespace std;
  22
  23 #include "warn.hh"
  24 #include "font-interface.hh"
  25 #include "line-interface.hh"
  26 #include "paper-column.hh"
  27 #include "output-def.hh"
  28 #include "text-interface.hh"
  29 #include "volta-bracket.hh"
  30 #include "pointer-group-interface.hh"
  31 #include "side-position-interface.hh"
  32 #include "directional-element-interface.hh"
  33 #include "lookup.hh"
  34 #include "tuplet-bracket.hh"
  35
  36 /*
  37   this is too complicated. Yet another version of side-positioning,
  38   badly implemented.
  39
  40   --
  41
  42   * Should look for system_start_delim to find left edge of staff.
  43   */
  44
  45 MAKE_SCHEME_CALLBACK (Volta_bracket_interface, print, 1);
  46 SCM
  47 Volta_bracket_interface::print (SCM smob)
  48 {
  49   Spanner *me = unsmob_spanner (smob);
  50   Spanner *orig_span = dynamic_cast<Spanner *> (me->original ());
  51   bool broken_first_bracket = orig_span && (orig_span->broken_intos_[0]
  52                                             == (Spanner *)me);
  53
  54   Output_def *layout = me->layout ();
  55   Real half_space = 0.5;
  56
  57   Item *bound = dynamic_cast<Spanner *> (me)->get_bound (LEFT);
  58
  59   /*
  60     not a start, but really broken in two
  61   */
  62   Real left = 0.;
  63   if (bound->break_status_dir () == RIGHT)
  64     {
  65       Paper_column *pc = bound->get_column ();
  66       left = pc->extent (pc, X_AXIS)[RIGHT]
  67         - bound->relative_coordinate (pc, X_AXIS);
  68     }
  69   else
  70     {
  71       /*
  72         the volta spanner is attached to the bar-line, which is moved
  73         to the right. We don't need to compensate for the left edge.
  74       */
  75     }
  76
  77   modify_edge_height (me);
  78   if (!me->is_live ())
  79     return SCM_EOL;
  80
  81   Drul_array<Real> edge_height = robust_scm2interval (me->get_property ("edge-height"),
  82                                                       Interval (1.0, 1.0));
  83   Drul_array<Real> flare = robust_scm2interval (me->get_property ("bracket-flare"),
  84                                                 Interval (0, 0));
  85   Drul_array<Real> shorten = robust_scm2interval (me->get_property ("shorten-pair"),
  86                                                   Interval (0, 0));
  87
  88
  89
  90   scale_drul (&edge_height, - Real (get_grob_direction (me)));
  91
  92   Interval empty;
  93   Offset start;
  94   start[X_AXIS] = me->spanner_length () - left - half_space;
  95
  96   /*
  97     ugh, Tuplet_bracket should use Horizontal_bracket, not the other way around.
  98   */
  99   Stencil total
 100     = Tuplet_bracket::make_bracket (me, Y_AXIS, start,
 101                                     edge_height, empty, flare, shorten);
 102
 103   if (!orig_span || broken_first_bracket)
 104     {
 105       SCM text = me->get_property ("text");
 106       SCM properties = me->get_property_alist_chain (SCM_EOL);
 107       SCM snum = Text_interface::interpret_markup (layout->self_scm (),
 108                                                    properties, text);
 109       Stencil num = *unsmob_stencil (snum);
 110       num.align_to (Y_AXIS, UP);
 111       num.translate_axis (-0.5, Y_AXIS);
 112       total.add_at_edge (X_AXIS, LEFT, num, - num.extent (X_AXIS).length ()
 113                          - 1.0);
 114     }
 115
 116   total.translate_axis (left, X_AXIS);
 117   return total.smobbed_copy ();
 118 }
 119
 120
 121 void
 122 Volta_bracket_interface::modify_edge_height (Spanner *me)
 123 {
 124   Spanner *orig_span = dynamic_cast<Spanner *> (me->original ());
 125
 126   bool broken_first_bracket = orig_span && (orig_span->broken_intos_[0] == (Spanner *)me);
 127   bool broken_last_bracket = orig_span && (orig_span->broken_intos_.back () == (Spanner *)me);
 128   bool no_vertical_start = orig_span && !broken_first_bracket;
 129   bool no_vertical_end = orig_span && !broken_last_bracket;
 130
 131   extract_grob_set (me, "bars", bars);
 132   Grob *endbar = bars.size () ? bars.back () : 0;
 133   SCM glyph = endbar ? endbar->get_property ("glyph-name") : SCM_EOL;
 134
 135   string str;
 136   if (scm_is_string (glyph))
 137     str = ly_scm2string (glyph);
 138   else
 139     str = "|";
 140
 141   no_vertical_end
 142     |= (str != ":|"
 143         && str != "|:"
 144         && str != "|."
 145         && str != ":|:"
 146         && str != ":|.|:"
 147         && str != ":|.:"
 148         && str != ".|");
 149
 150   if (no_vertical_end || no_vertical_start)
 151     {
 152       Drul_array<Real> edge_height = robust_scm2interval (me->get_property ("edge-height"),
 153                                                           Interval (1.0, 1.0));
 154       if (no_vertical_start)
 155         edge_height[LEFT] = 0.0;
 156
 157       if (no_vertical_end)
 158         edge_height[RIGHT] = 0.0;
 159
 160       me->set_property ("edge-height", ly_interval2scm (edge_height));
 161     }
 162
 163   if (broken_last_bracket && no_vertical_end && no_vertical_start
 164       && !broken_first_bracket)
 165     me->suicide ();
 166 }
 167
 168 void
 169 Volta_bracket_interface::add_bar (Grob *me, Item *b)
 170 {
 171   Pointer_group_interface::add_grob (me, ly_symbol2scm ("bars"), b);
 172   add_bound_item (dynamic_cast<Spanner *> (me), b);
 173 }
 174
 175 ADD_INTERFACE (Volta_bracket_interface,
 176                "Volta bracket with number.",
 177
 178                /* properties */
 179                "bars "
 180                "thickness "
 181                "height "
 182                );
 183