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"
25 System_start_delimiter::staff_bracket (Grob *me, Real height)
27 Font_metric *fm = Font_interface::get_default_font (me);
28 Drul_array<Stencil> tips (fm->find_by_name ("brackettips.down"),
29 fm->find_by_name ("brackettips.up"));
31 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)));
43 bracket.add_at_edge (Y_AXIS, d, tips[d], -overlap, 0.0);
45 while (flip (&d) != DOWN);
52 System_start_delimiter::simple_bar (Grob *me, Real h)
54 Real lt = me->get_layout ()->get_dimension (ly_symbol2scm ("linethickness"));
55 Real w = lt * robust_scm2double (me->get_property ("thickness"), 1);
56 return Lookup::round_filled_box (Box (Interval (0, w), Interval (-h / 2, h / 2)),
60 MAKE_SCHEME_CALLBACK (System_start_delimiter, after_line_breaking, 1);
63 System_start_delimiter::after_line_breaking (SCM smob)
65 Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
67 SCM gl = me->get_property ("glyph");
68 if (ly_is_equal (gl, scm_makfrom0str ("bar-line")))
71 Paper_column *left_column = me->get_bound (LEFT)->get_column ();
74 Get all coordinates, to trigger Hara kiri.
76 extract_grob_set (me, "elements", elts);
77 Grob *common = common_refpoint_of_array (elts, me, Y_AXIS);
79 for (int i = elts.size(); i--;)
81 Spanner *staff = dynamic_cast<Spanner*> (elts[i]);
83 staff->get_bound (LEFT)->get_column () != left_column)
86 Interval v = staff->extent (common, Y_AXIS);
97 return SCM_UNSPECIFIED;
100 MAKE_SCHEME_CALLBACK (System_start_delimiter, print, 1);
102 System_start_delimiter::print (SCM smob)
104 Spanner *me = unsmob_spanner (smob);
108 SCM s = me->get_property ("glyph");
109 if (!scm_is_string (s))
111 SCM gsym = scm_string_to_symbol (s);
113 Real staff_space = Staff_symbol_referencer::staff_space (me);
115 extract_grob_set (me, "elements", elts);
116 Grob *common = common_refpoint_of_array (elts, me, Y_AXIS);
120 for (int i = elts.size(); i--;)
122 Spanner *sp = dynamic_cast<Spanner*> (elts[i]);
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 = max (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 "