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>
12 #include "axis-group-interface.hh"
13 #include "system-start-delimiter.hh"
14 #include "output-def.hh"
16 #include "font-interface.hh"
17 #include "all-font-metrics.hh"
19 #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);
64 System_start_delimiter::simple_bar (Grob*me,Real h)
66 Real lt =me->get_paper ()->get_dimension (ly_symbol2scm ("linethickness")) ;
67 Real w = lt * robust_scm2double (me->get_property ("thickness"), 1);
68 return Lookup::round_filled_box (Box (Interval (0,w), Interval (-h/2, h/2)),
72 MAKE_SCHEME_CALLBACK (System_start_delimiter,after_line_breaking,1);
75 System_start_delimiter::after_line_breaking (SCM smob)
77 Grob * me = unsmob_grob (smob);
78 SCM gl = me->get_property ("glyph");
79 if (ly_c_equal_p (gl,scm_makfrom0str ("bar-line")))
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 Interval v = unsmob_grob (scm_car (s))->extent (common, Y_AXIS);
102 return SCM_UNSPECIFIED;
106 MAKE_SCHEME_CALLBACK (System_start_delimiter,print,1);
108 System_start_delimiter::print (SCM smob)
110 Spanner * me = unsmob_spanner (smob);
114 SCM s = me->get_property ("glyph");
115 if (!scm_is_string (s))
117 SCM gsym = scm_string_to_symbol (s) ;
119 Real staff_space = Staff_symbol_referencer::staff_space (me);
121 SCM elts = me->get_property ("elements");
122 Grob * common = common_refpoint_of_list (elts, me, Y_AXIS);
125 for (SCM s = elts; scm_is_pair (s); s = scm_cdr (s))
127 Spanner * sp = unsmob_spanner (scm_car (s));
129 sp->get_bound (LEFT) == me->get_bound (LEFT))
131 Interval dims = sp->extent (common, Y_AXIS);
132 if (!dims.is_empty ())
137 ext -= me->relative_coordinate (common, Y_AXIS);
139 Real l = ext.length () / staff_space;
142 || (robust_scm2double (me->get_property ("collapse-height"), 0.0) >= l))
150 if (gsym== ly_symbol2scm ("bracket"))
151 m = staff_bracket (me,l);
152 else if (gsym == ly_symbol2scm ("brace"))
153 m = staff_brace (me,l);
154 else if (gsym == ly_symbol2scm ("bar-line"))
155 m = simple_bar (me,l);
157 m.translate_axis (ext.center (), Y_AXIS);
158 return m.smobbed_copy ();
162 System_start_delimiter::staff_brace (Grob*me, Real y)
166 /* We go through the style sheet to lookup the font file
167 name. This is better than using find_font directly,
168 esp. because that triggers mktextfm for non-existent
170 SCM fam = scm_cons (ly_symbol2scm ("font-encoding"), ly_symbol2scm ("fetaBraces"));
172 SCM alist = scm_list_n (fam, SCM_UNDEFINED);
173 fm = select_font (me->get_paper (), scm_list_n (alist, SCM_UNDEFINED));
178 int hi = (fm->count () - 1) >? 2;
181 /* do a binary search for each Y, not very efficient, but passable? */
184 int cmp = (lo + hi) / 2;
185 b = fm->get_indexed_char (cmp);
186 if (b[Y_AXIS].is_empty () || b[Y_AXIS].length () > y)
194 Stencil stil (fm->get_indexed_char_stencil (lo));
195 b = stil.extent_box ();
196 b[X_AXIS] = Interval (0, 0);
198 return Stencil (b, stil.expr ());
204 ADD_INTERFACE (System_start_delimiter,"system-start-delimiter-interface",
205 "The brace, bracket or bar in front of the system. "
206 "It is implemented as a spanner."
208 "collapse-height thickness "
209 "arch-height arch-angle arch-thick arch-width bracket-thick glyph");