+/* Draws a vertical bracket to the left of a chord
+ Chris Jackson <chris@fluffhouse.org.uk> */
+
+MAKE_SCHEME_CALLBACK (Arpeggio, brew_chord_bracket, 1);
+SCM
+Arpeggio::brew_chord_bracket (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+
+ Grob * common = me;
+ for (SCM s = me->get_grob_property ("stems"); gh_pair_p (s); s = ly_cdr (s))
+ {
+ Grob * stem = unsmob_grob (ly_car (s));
+ common = common->common_refpoint (Staff_symbol_referencer::staff_symbol_l (stem),
+ Y_AXIS);
+ }
+
+ Interval heads;
+ Real my_y = me->relative_coordinate (common, Y_AXIS);
+
+ for (SCM s = me->get_grob_property ("stems"); gh_pair_p (s); s = ly_cdr (s))
+ {
+ Grob * stem = unsmob_grob (ly_car (s));
+ Grob * ss = Staff_symbol_referencer::staff_symbol_l (stem);
+ Interval iv = Stem::head_positions (stem);
+ iv *= Staff_symbol::staff_space (ss)/2.0;
+ heads.unite (iv + ss->relative_coordinate (common, Y_AXIS) - my_y);
+ }
+
+ Real lt = me->paper_l ()->get_var ("linethickness");
+ Real sp = 1.5 * Staff_symbol_referencer::staff_space (me);
+ Real dy = heads.length() + sp;
+ Real x = 0.7;
+
+ Molecule l1 = Lookup::line (lt, Offset(0, 0), Offset (0, dy));
+ Molecule bottom = Lookup::line (lt, Offset(0, 0), Offset (x, 0));
+ Molecule top = Lookup::line (lt, Offset(0, dy), Offset (x, dy));
+ Molecule mol;
+ mol.add_molecule (l1);
+ mol.add_molecule (bottom);
+ mol.add_molecule (top);
+ mol.translate_axis (heads[LEFT] - sp/2.0, Y_AXIS);
+ return mol.smobbed_copy();
+}
+
+