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"
14 #include "axis-group-interface.hh"
15 #include "output-def.hh"
16 #include "font-interface.hh"
17 #include "all-font-metrics.hh"
18 #include "staff-symbol-referencer.hh"
23 System_start_delimiter::staff_bracket (Grob *me, Real height)
25 Real arc_height = scm_to_double (me->get_property ("arch-height"));
27 SCM at = scm_list_n (ly_symbol2scm ("bracket"),
28 me->get_property ("arch-angle"),
29 me->get_property ("arch-width"),
30 scm_make_real (arc_height),
31 scm_make_real (height),
32 me->get_property ("arch-thick"),
33 me->get_property ("thickness"),
40 In system-start-delimiter.cc I see the line
42 Real h = height + 2 * arc_height;
44 But I really think that you mean
46 Real h = height + 2 * arc_width;
48 (arc_height changes the x-axis-size of arc ; arc_width changes the
50 Will not fix it since I'm not sure.
54 Real h = height + 2 * arc_height;
55 Box b (Interval (0, 1.5), Interval (-h / 2, h / 2));
57 mol.align_to (X_AXIS, CENTER);
62 System_start_delimiter::simple_bar (Grob *me, Real h)
64 Real lt = me->get_layout ()->get_dimension (ly_symbol2scm ("linethickness"));
65 Real w = lt * robust_scm2double (me->get_property ("thickness"), 1);
66 return Lookup::round_filled_box (Box (Interval (0, w), Interval (-h / 2, h / 2)),
70 MAKE_SCHEME_CALLBACK (System_start_delimiter, after_line_breaking, 1);
73 System_start_delimiter::after_line_breaking (SCM smob)
75 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
77 SCM gl = me->get_property ("glyph");
78 if (ly_c_equal_p (gl, scm_makfrom0str ("bar-line")))
81 Paper_column *left_column = me->get_bound (LEFT)->get_column ();
84 Get all coordinates, to trigger Hara kiri.
86 SCM elts = me->get_property ("elements");
87 Grob *common = common_refpoint_of_list (elts, me, Y_AXIS);
88 for (SCM s = elts; scm_is_pair (s); s = scm_cdr (s))
90 Spanner *staff = dynamic_cast<Spanner*> (unsmob_grob (scm_car (s)));
92 staff->get_bound (LEFT)->get_column () != left_column)
95 Interval v = staff->extent (common, Y_AXIS);
106 return SCM_UNSPECIFIED;
109 MAKE_SCHEME_CALLBACK (System_start_delimiter, print, 1);
111 System_start_delimiter::print (SCM smob)
113 Spanner *me = unsmob_spanner (smob);
117 SCM s = me->get_property ("glyph");
118 if (!scm_is_string (s))
120 SCM gsym = scm_string_to_symbol (s);
122 Real staff_space = Staff_symbol_referencer::staff_space (me);
124 SCM elts = me->get_property ("elements");
125 Grob *common = common_refpoint_of_list (elts, me, Y_AXIS);
128 for (SCM s = elts; scm_is_pair (s); s = scm_cdr (s))
130 Spanner *sp = unsmob_spanner (scm_car (s));
132 && sp->get_bound (LEFT) == me->get_bound (LEFT))
134 Interval dims = sp->extent (common, Y_AXIS);
135 if (!dims.is_empty ())
140 ext -= me->relative_coordinate (common, Y_AXIS);
142 Real len = ext.length () / staff_space;
145 || (robust_scm2double (me->get_property ("collapse-height"), 0.0) >= len))
153 if (gsym == ly_symbol2scm ("bracket"))
154 m = staff_bracket (me, len);
155 else if (gsym == ly_symbol2scm ("brace"))
156 m = staff_brace (me, len);
157 else if (gsym == ly_symbol2scm ("bar-line"))
158 m = simple_bar (me, len);
160 m.translate_axis (ext.center (), Y_AXIS);
161 return m.smobbed_copy ();
165 System_start_delimiter::staff_brace (Grob *me, Real y)
168 /* We go through the style sheet to lookup the font file
169 name. This is better than using find_font directly,
170 esp. because that triggers mktextfm for non-existent
172 SCM fam = scm_cons (ly_symbol2scm ("font-encoding"),
173 ly_symbol2scm ("fetaBraces"));
175 SCM alist = scm_list_n (fam, SCM_UNDEFINED);
176 fm = select_font (me->get_layout (), scm_list_n (alist, SCM_UNDEFINED));
179 int hi = max (fm->count () - 1,2);
182 /* do a binary search for each Y, not very efficient, but passable? */
185 int cmp = (lo + hi) / 2;
186 b = fm->get_indexed_char (cmp);
187 if (b[Y_AXIS].is_empty () || b[Y_AXIS].length () > y)
194 Stencil stil (fm->find_by_name ("brace" + to_string (lo)));
195 b = stil.extent_box ();
196 b[X_AXIS] = Interval (0, 0);
198 return Stencil (b, stil.expr ());
201 ADD_INTERFACE (System_start_delimiter, "system-start-delimiter-interface",
202 "The brace, bracket or bar in front of the system. "
203 "It is implemented as a spanner.",
204 "collapse-height thickness "
205 "arch-height arch-angle arch-thick arch-width bracket-thick glyph");