2 system-start-delimiter.cc -- implement System_start_delimiter
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "axis-group-interface.hh"
12 #include "system-start-delimiter.hh"
13 #include "paper-def.hh"
15 #include "font-interface.hh"
16 #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 = ly_scm2double (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);
63 System_start_delimiter::simple_bar (Grob*me,Real h)
65 Real lt =me->get_paper ()->get_dimension (ly_symbol2scm ("linethickness")) ;
66 Real w = lt * robust_scm2double (me->get_property ("thickness"), 1);
67 return Lookup::round_filled_box (Box (Interval (0,w), Interval (-h/2, h/2)),
71 MAKE_SCHEME_CALLBACK (System_start_delimiter,after_line_breaking,1);
74 System_start_delimiter::after_line_breaking (SCM smob)
76 Grob * me = unsmob_grob (smob);
77 SCM gl = me->get_property ("glyph");
78 if (ly_c_equal_p (gl,scm_makfrom0str ("bar-line")))
83 Get all coordinates, to trigger Hara kiri.
85 SCM elts = me->get_property ("elements");
86 Grob *common = common_refpoint_of_list (elts, me, Y_AXIS);
87 for (SCM s = elts; ly_c_pair_p (s); s = ly_cdr (s))
89 Interval v = unsmob_grob (ly_car (s))->extent (common, Y_AXIS);
101 return SCM_UNSPECIFIED;
105 MAKE_SCHEME_CALLBACK (System_start_delimiter,print,1);
107 System_start_delimiter::print (SCM smob)
109 Grob * me = unsmob_grob (smob);
111 SCM s = me->get_property ("glyph");
112 if (!ly_c_string_p (s))
114 SCM gsym = scm_string_to_symbol (s) ;
116 Real staff_space = Staff_symbol_referencer::staff_space (me);
117 Interval ext = ly_scm2interval (Axis_group_interface::group_extent_callback
118 (me->self_scm (), scm_int2num (Y_AXIS)));
119 Real l = ext.length () / staff_space;
122 || (robust_scm2double (me->get_property ("collapse-height"), 0.0) >= l))
130 if (gsym== ly_symbol2scm ("bracket"))
131 m = staff_bracket (me,l);
132 else if (gsym == ly_symbol2scm ("brace"))
133 m = staff_brace (me,l);
134 else if (gsym == ly_symbol2scm ("bar-line"))
135 m = simple_bar (me,l);
137 m.translate_axis (ext.center (), Y_AXIS);
138 return m.smobbed_copy ();
142 System_start_delimiter::staff_brace (Grob*me, Real y)
146 /* We go through the style sheet to lookup the font file
147 name. This is better than using find_font directly,
148 esp. because that triggers mktextfm for non-existent
150 SCM fam = scm_cons (ly_symbol2scm ("font-encoding"), ly_symbol2scm ("fetaBraces"));
152 SCM alist = scm_list_n (fam, SCM_UNDEFINED);
153 fm = select_font (me->get_paper (), scm_list_n (alist, SCM_UNDEFINED));
158 int hi = (fm->count () - 1) >? 2;
161 /* do a binary search for each Y, not very efficient, but passable? */
164 int cmp = (lo + hi) / 2;
165 b = fm->get_indexed_char (cmp);
166 if (b[Y_AXIS].is_empty () || b[Y_AXIS].length () > y)
174 Stencil stil (fm->get_indexed_char_stencil (lo));
175 b = stil.extent_box ();
176 b[X_AXIS] = Interval (0, 0);
178 return Stencil (b, stil.expr ());
184 ADD_INTERFACE (System_start_delimiter,"system-start-delimiter-interface",
185 "The brace, bracket or bar in front of the system. "
186 "It is implemented as a spanner."
188 "collapse-height thickness "
189 "arch-height arch-angle arch-thick arch-width bracket-thick glyph");