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"
22 System_start_delimiter::staff_bracket (Grob *me, Real height)
24 Real arc_height = scm_to_double (me->get_property ("arch-height"));
26 SCM at = scm_list_n (ly_symbol2scm ("bracket"),
27 me->get_property ("arch-angle"),
28 me->get_property ("arch-width"),
29 scm_make_real (arc_height),
30 scm_make_real (height),
31 me->get_property ("arch-thick"),
32 me->get_property ("thickness"),
39 In system-start-delimiter.cc I see the line
41 Real h = height + 2 * arc_height;
43 But I really think that you mean
45 Real h = height + 2 * arc_width;
47 (arc_height changes the x-axis-size of arc ; arc_width changes the
49 Will not fix it since I'm not sure.
53 Real h = height + 2 * arc_height;
54 Box b (Interval (0, 1.5), Interval (-h / 2, h / 2));
56 mol.align_to (X_AXIS, CENTER);
61 System_start_delimiter::simple_bar (Grob *me, Real h)
63 Real lt = me->get_layout ()->get_dimension (ly_symbol2scm ("linethickness"));
64 Real w = lt * robust_scm2double (me->get_property ("thickness"), 1);
65 return Lookup::round_filled_box (Box (Interval (0, w), Interval (-h / 2, h / 2)),
69 MAKE_SCHEME_CALLBACK (System_start_delimiter, after_line_breaking, 1);
72 System_start_delimiter::after_line_breaking (SCM smob)
74 Grob *me = unsmob_grob (smob);
75 SCM gl = me->get_property ("glyph");
76 if (ly_c_equal_p (gl, scm_makfrom0str ("bar-line")))
81 Get all coordinates, to trigger Hara kiri.
83 SCM elts = me->get_property ("elements");
84 Grob *common = common_refpoint_of_list (elts, me, Y_AXIS);
85 for (SCM s = elts; scm_is_pair (s); s = scm_cdr (s))
87 Interval v = unsmob_grob (scm_car (s))->extent (common, Y_AXIS);
98 return SCM_UNSPECIFIED;
101 MAKE_SCHEME_CALLBACK (System_start_delimiter, print, 1);
103 System_start_delimiter::print (SCM smob)
105 Spanner *me = unsmob_spanner (smob);
109 SCM s = me->get_property ("glyph");
110 if (!scm_is_string (s))
112 SCM gsym = scm_string_to_symbol (s);
114 Real staff_space = Staff_symbol_referencer::staff_space (me);
116 SCM elts = me->get_property ("elements");
117 Grob *common = common_refpoint_of_list (elts, me, Y_AXIS);
120 for (SCM s = elts; scm_is_pair (s); s = scm_cdr (s))
122 Spanner *sp = unsmob_spanner (scm_car (s));
124 && sp->get_bound (LEFT) == me->get_bound (LEFT))
126 Interval dims = sp->extent (common, Y_AXIS);
127 if (!dims.is_empty ())
132 ext -= me->relative_coordinate (common, Y_AXIS);
134 Real len = ext.length () / staff_space;
137 || (robust_scm2double (me->get_property ("collapse-height"), 0.0) >= len))
145 if (gsym == ly_symbol2scm ("bracket"))
146 m = staff_bracket (me, len);
147 else if (gsym == ly_symbol2scm ("brace"))
148 m = staff_brace (me, len);
149 else if (gsym == ly_symbol2scm ("bar-line"))
150 m = simple_bar (me, len);
152 m.translate_axis (ext.center (), Y_AXIS);
153 return m.smobbed_copy ();
157 System_start_delimiter::staff_brace (Grob *me, Real y)
160 /* We go through the style sheet to lookup the font file
161 name. This is better than using find_font directly,
162 esp. because that triggers mktextfm for non-existent
164 SCM fam = scm_cons (ly_symbol2scm ("font-encoding"),
165 ly_symbol2scm ("fetaBraces"));
167 SCM alist = scm_list_n (fam, SCM_UNDEFINED);
168 fm = select_font (me->get_layout (), scm_list_n (alist, SCM_UNDEFINED));
171 int hi = (fm->count () - 1) >? 2;
174 /* do a binary search for each Y, not very efficient, but passable? */
177 int cmp = (lo + hi) / 2;
178 b = fm->get_indexed_char (cmp);
179 if (b[Y_AXIS].is_empty () || b[Y_AXIS].length () > y)
186 Stencil stil (fm->find_by_name ("brace" + to_string (lo)));
187 b = stil.extent_box ();
188 b[X_AXIS] = Interval (0, 0);
190 return Stencil (b, stil.expr ());
193 ADD_INTERFACE (System_start_delimiter, "system-start-delimiter-interface",
194 "The brace, bracket or bar in front of the system. "
195 "It is implemented as a spanner.",
196 "collapse-height thickness "
197 "arch-height arch-angle arch-thick arch-width bracket-thick glyph");