lily/horizontal-bracket.cc

   1 /*
   2   horizontal-bracket.cc -- implement Horizontal_bracket
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2002--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "horizontal-bracket.hh"
  10
  11 #include "lookup.hh"
  12 #include "side-position-interface.hh"
  13 #include "pointer-group-interface.hh"
  14 #include "directional-element-interface.hh"
  15 #include "output-def.hh"
  16 #include "staff-symbol-referencer.hh"
  17 #include "tuplet-bracket.hh"
  18 #include "axis-group-interface.hh"
  19 #include "spanner.hh"
  20 #include "item.hh"
  21
  22
  23 Stencil
  24 Horizontal_bracket::make_bracket (Grob *me,
  25                                   Real length,
  26                                   Axis a, Direction dir)
  27 {
  28   Drul_array<Real> edge_height = robust_scm2interval (me->get_property ("edge-height"),
  29                                                       Interval (1.0, 1.0));
  30   Drul_array<Real> flare = robust_scm2interval (me->get_property ("bracket-flare"),
  31                                                 Interval (0, 0));
  32   Drul_array<Real> shorten = robust_scm2interval (me->get_property ("shorten-pair"),
  33                                                   Interval (0, 0));
  34
  35
  36   // Make sure that it points in the correct direction:
  37   scale_drul (&edge_height, Real (-dir));
  38
  39   Interval empty;
  40   Offset start;
  41   start[a] = length;
  42
  43   Drul_array<bool> connect_to_other =
  44     robust_scm2booldrul (me->get_property ("connect-to-neighbor"),
  45                          Drul_array<bool> (false, false));
  46
  47   Direction d = LEFT;
  48   do
  49     {
  50       if (connect_to_other[d])
  51         {
  52           edge_height[d] = 0.0;
  53           flare[d] = 0.0;
  54           shorten[d] = 0.0;
  55         }
  56     }
  57   while (flip (&d) != LEFT);
  58
  59   /*
  60     ugh, Tuplet_bracket should use Horizontal_bracket, not the other way around.
  61   */
  62   return Tuplet_bracket::make_bracket (me, other_axis (a), start,
  63                                        edge_height, empty, flare, shorten);
  64 }
  65
  66
  67 Stencil
  68 Horizontal_bracket::make_enclosing_bracket (Grob *me, Grob *refpoint,
  69                                             vector<Grob*> grobs,
  70                                             Axis a, Direction dir)
  71 {
  72   Grob *common = common_refpoint_of_array (grobs, refpoint, a);
  73   Interval ext = Axis_group_interface::relative_group_extent (grobs, common, a);
  74
  75   if (ext.is_empty ())
  76     {
  77       me->programming_error ("Can't enclose empty extents with bracket");
  78       return Stencil ();
  79     }
  80   else
  81     {
  82       Stencil b = make_bracket (me, ext.length (), a, dir);
  83       b.translate_axis (ext[LEFT] - refpoint->relative_coordinate (common, a), a);
  84
  85       return b;
  86     }
  87 }
  88
  89 /*
  90   TODO:
  91
  92   Support texts on the brackets?
  93 */
  94 MAKE_SCHEME_CALLBACK (Horizontal_bracket, print, 1);
  95 SCM
  96 Horizontal_bracket::print (SCM smob)
  97 {
  98   Spanner *me = unsmob_spanner (smob);
  99   extract_grob_set (me, "columns", gs);
 100
 101   vector<Grob*> enclosed = gs;
 102   if (!gs.size ())
 103     {
 104       me->suicide ();
 105       return SCM_EOL;
 106     }
 107
 108   Direction d = LEFT;
 109   do
 110     {
 111       Item *b = me->get_bound (d);
 112       if (b->break_status_dir ())
 113         enclosed.push_back (b);
 114     }
 115   while (flip (&d) != LEFT);
 116
 117   Stencil b = make_enclosing_bracket (me, me, enclosed, X_AXIS, get_grob_direction (me));
 118   return b.smobbed_copy ();
 119 }
 120
 121 ADD_INTERFACE (Horizontal_bracket,
 122                "A horizontal bracket encompassing notes.",
 123
 124                /* properties */
 125                "bracket-flare "
 126                "columns "
 127                "edge-height "
 128                "shorten-pair "
 129                "connect-to-neighbor "
 130                );
 131