2 system-start-delimiter.cc -- implement System_start_delimiter
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "system-start-delimiter.hh"
15 #include "axis-group-interface.hh"
16 #include "output-def.hh"
17 #include "font-interface.hh"
18 #include "all-font-metrics.hh"
19 #include "staff-symbol-referencer.hh"
23 #include "pointer-group-interface.hh"
26 System_start_delimiter::staff_bracket (Grob *me, Real height)
28 Font_metric *fm = Font_interface::get_default_font (me);
29 Drul_array<Stencil> tips (fm->find_by_name ("brackettips.down"),
30 fm->find_by_name ("brackettips.up"));
32 Real thickness = robust_scm2double (me->get_property ("thickness"), 0.25);
34 Real overlap = 0.1 * thickness;
36 Stencil bracket = Lookup::filled_box (Box (Interval (0, thickness),
38 * (height / 2 + overlap)));
42 bracket.add_at_edge (Y_AXIS, d, tips[d], -overlap, 0.0);
43 while (flip (&d) != DOWN)
50 System_start_delimiter::simple_bar (Grob *me, Real h)
52 Real lt = me->get_layout ()->get_dimension (ly_symbol2scm ("linethickness"));
53 Real w = lt * robust_scm2double (me->get_property ("thickness"), 1);
54 return Lookup::round_filled_box (Box (Interval (0, w), Interval (-h / 2, h / 2)),
58 MAKE_SCHEME_CALLBACK (System_start_delimiter, after_line_breaking, 1);
61 System_start_delimiter::after_line_breaking (SCM smob)
63 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
65 SCM gl = me->get_property ("glyph");
66 if (ly_is_equal (gl, scm_makfrom0str ("bar-line")))
69 Paper_column *left_column = me->get_bound (LEFT)->get_column ();
72 Get all coordinates, to trigger Hara kiri.
74 extract_grob_set (me, "elements", elts);
75 Grob *common = common_refpoint_of_array (elts, me, Y_AXIS);
77 for (int i = elts.size (); i--;)
79 Spanner *staff = dynamic_cast<Spanner *> (elts[i]);
81 || staff->get_bound (LEFT)->get_column () != left_column)
84 Interval v = staff->extent (common, Y_AXIS);
93 return SCM_UNSPECIFIED;
96 MAKE_SCHEME_CALLBACK (System_start_delimiter, print, 1);
98 System_start_delimiter::print (SCM smob)
100 Spanner *me = unsmob_spanner (smob);
104 SCM s = me->get_property ("glyph");
105 if (!scm_is_string (s))
107 SCM gsym = scm_string_to_symbol (s);
109 Real staff_space = Staff_symbol_referencer::staff_space (me);
111 extract_grob_set (me, "elements", elts);
112 Grob *common = common_refpoint_of_array (elts, me, Y_AXIS);
116 for (int i = elts.size (); i--;)
118 Spanner *sp = dynamic_cast<Spanner *> (elts[i]);
120 && sp->get_bound (LEFT) == me->get_bound (LEFT))
122 Interval dims = sp->extent (common, Y_AXIS);
123 if (!dims.is_empty ())
128 ext -= me->relative_coordinate (common, Y_AXIS);
130 Real len = ext.length () / staff_space;
133 || (robust_scm2double (me->get_property ("collapse-height"), 0.0) >= len))
141 if (gsym == ly_symbol2scm ("bracket"))
142 m = staff_bracket (me, len);
143 else if (gsym == ly_symbol2scm ("brace"))
144 m = staff_brace (me, len);
145 else if (gsym == ly_symbol2scm ("bar-line"))
146 m = simple_bar (me, len);
148 m.translate_axis (ext.center (), Y_AXIS);
149 return m.smobbed_copy ();
153 System_start_delimiter::staff_brace (Grob *me, Real y)
156 /* We go through the style sheet to lookup the font file
157 name. This is better than using find_font directly,
158 esp. because that triggers mktextfm for non-existent
160 SCM fam = scm_cons (ly_symbol2scm ("font-encoding"),
161 ly_symbol2scm ("fetaBraces"));
163 SCM alist = scm_list_n (fam, SCM_UNDEFINED);
164 fm = select_font (me->get_layout (), scm_list_n (alist, SCM_UNDEFINED));
167 int hi = max (fm->count () - 1, 2);
169 /* do a binary search for each Y, not very efficient, but passable? */
173 int cmp = (lo + hi) / 2;
174 b = fm->get_indexed_char (cmp);
175 if (b[Y_AXIS].is_empty () || b[Y_AXIS].length () > y)
182 Stencil stil (fm->find_by_name ("brace" + to_string (lo)));
183 stil.translate_axis (-b[X_AXIS].length()/2, X_AXIS);
188 ADD_INTERFACE (System_start_delimiter, "system-start-delimiter-interface",
189 "The brace, bracket or bar in front of the system. "
190 "It is implemented as a spanner.",