+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 1997--2015 Jan Nieuwenhuizen <janneke@gnu.org>
+ Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+ #include "bracket.hh"
+
+ #include "axis-group-interface.hh"
+ #include "directional-element-interface.hh"
+ #include "grob.hh"
+ #include "lookup.hh"
+ #include "output-def.hh"
+ #include "staff-symbol-referencer.hh"
+ #include "spanner.hh"
+ #include "item.hh"
+ #include "line-interface.hh"
+
+/*
+ should move to lookup?
+
+ TODO: this will fail for very short (shorter than the flare)
+ brackets.
+*/
+Stencil
+Bracket::make_bracket (Grob *me, // for line properties.
+ Axis protrusion_axis, Offset dz,
+ Drul_array<Real> height, Interval gap,
+ Drul_array<Real> flare, Drul_array<Real> shorten)
+{
+ Drul_array<Offset> corners (Offset (0, 0), dz);
+
+ Real length = dz.length ();
+ Drul_array<Offset> gap_corners;
+
+ Axis bracket_axis = other_axis (protrusion_axis);
+
+ Drul_array<Offset> straight_corners = corners;
+
+ for (LEFT_and_RIGHT (d))
+ straight_corners[d] += -d * shorten[d] / length * dz;
+
+ if (!gap.is_empty ())
+ {
+ for (LEFT_and_RIGHT (d))
+ gap_corners[d] = (dz * 0.5) + gap[d] / length * dz;
+ }
+
+ Drul_array<Offset> flare_corners = straight_corners;
+ for (LEFT_and_RIGHT (d))
+ {
+ flare_corners[d][bracket_axis] = straight_corners[d][bracket_axis];
+ flare_corners[d][protrusion_axis] += height[d];
+ straight_corners[d][bracket_axis] += -d * flare[d];
+ }
+
+ Stencil m;
+ if (!gap.is_empty ())
+ for (LEFT_and_RIGHT (d))
+ m.add_stencil (Line_interface::line (me, straight_corners[d],
+ gap_corners[d]));
+ else
+ m.add_stencil (Line_interface::line (me, straight_corners[LEFT],
+ straight_corners[RIGHT]));
+
+ if (scm_is_number (me->get_property ("dash-fraction")))
+ me->set_property ("dash-fraction", scm_from_double (1.0));
+ for (LEFT_and_RIGHT (d))
+ m.add_stencil (Line_interface::line (me, straight_corners[d],
+ flare_corners[d]));
+ return m;
+}
+
+/*
+ Return an ungapped bracket along either the X- or Y-axis.
+*/
+Stencil
+Bracket::make_axis_constrained_bracket (Grob *me, Real length, Axis a,
+ Direction dir)
+{
+ Drul_array<Real> edge_height = robust_scm2interval (me->get_property ("edge-height"),
+ Interval (1.0, 1.0));
+ Drul_array<Real> flare = robust_scm2interval (me->get_property ("bracket-flare"),
+ Interval (0, 0));
+ Drul_array<Real> shorten = robust_scm2interval (me->get_property ("shorten-pair"),
+ Interval (0, 0));
+
+ // Make sure that it points in the correct direction:
+ scale_drul (&edge_height, Real (-dir));
+
+ Offset start;
+ start[a] = length;
+
+ Drul_array<bool> connect_to_other
+ = robust_scm2booldrul (me->get_property ("connect-to-neighbor"),
+ Drul_array<bool> (false, false));
+
+ for (LEFT_and_RIGHT (d))
+ {
+ if (connect_to_other[d])
+ {
+ edge_height[d] = 0.0;
+ flare[d] = 0.0;
+ shorten[d] = 0.0;
+ }
+ }
+
+ return make_bracket (me, other_axis (a), start, edge_height,
+ Interval (), flare, shorten);
+}
+
+/*
+ Return an axis-constrained, ungapped bracket which encloses a group of
+ grobs. Used for analysis brackets (HorizontalBracket) and
+ figured bass (BassFigureBracket).
+*/
+Stencil
+Bracket::make_enclosing_bracket (Grob *me, Grob *refpoint,
+ vector<Grob *> grobs, Axis a,
+ Direction dir)
+{
+ Grob *common = common_refpoint_of_array (grobs, refpoint, a);
+ Interval ext = Axis_group_interface::relative_group_extent (grobs, common, a);
+
+ if (ext.is_empty ())
+ {
+ me->programming_error ("Can't enclose empty extents with bracket");
+ return Stencil ();
+ }
+ else
+ {
+ Stencil b = make_axis_constrained_bracket (me, ext.length (), a, dir);
+ b.translate_axis (ext[LEFT] - refpoint->relative_coordinate (common, a), a);
+
+ return b;
+ }
+}