2 bar.cc -- implement Bar
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
12 #include "paper-column.hh"
14 #include "bar-line.hh"
17 #include "output-def.hh"
18 #include "font-interface.hh"
20 #include "all-font-metrics.hh"
22 #include "staff-symbol-referencer.hh"
24 MAKE_SCHEME_CALLBACK (Bar_line,print,1);
27 Bar_line::print (SCM smob)
29 Grob * me = unsmob_grob (smob);
31 SCM s = me->get_property ("glyph");
32 SCM barsiz_proc = me->get_property ("bar-size-procedure");
33 if (scm_is_string (s) && ly_c_procedure_p (barsiz_proc))
35 String str =ly_scm2string (s);
36 SCM siz = scm_call_1 (barsiz_proc, me->self_scm ());
37 Real sz = robust_scm2double (siz, 0);
41 return compound_barline (me, str, sz).smobbed_copy ();
48 Bar_line::compound_barline (Grob*me, String str, Real h)
50 Real kern = robust_scm2double (me->get_property ("kern"), 1);
51 Real thinkern = robust_scm2double (me->get_property ("thin-kern"), 1);
52 Real hair = robust_scm2double (me->get_property ("hair-thickness"), 1);
53 Real fatline = robust_scm2double (me->get_property ("thick-thickness"), 1);
55 Real staffline = me->get_paper ()->get_dimension (ly_symbol2scm ("linethickness"));
56 Real staff_space = Staff_symbol_referencer::staff_space (me);
59 thinkern *= staffline;
63 Stencil thin = simple_barline (me, hair, h);
64 Stencil thick = simple_barline (me, fatline, h);
65 Stencil dot = Font_interface::get_default_font (me)->find_by_name ("dots-dot");
67 int lines =Staff_symbol_referencer::line_count (me);
69 = ((lines & 1 || lines == 0)
71 : (staff_space < 2 ? 2 : .5) ) * staff_space;
73 colon.translate_axis (dist,Y_AXIS);
74 colon.add_stencil (dot);
75 colon.translate_axis (-dist/2,Y_AXIS);
83 return Lookup::blank (Box (Interval (0, 0), Interval (-h/2, h/2)));
89 else if (str == "|." || (h == 0 && str == ":|"))
91 m.add_at_edge (X_AXIS, LEFT, thick, 0, 0);
92 m.add_at_edge (X_AXIS, LEFT, thin, kern,0 );
94 else if (str == ".|" || (h == 0 && str == "|:"))
96 m.add_at_edge (X_AXIS, RIGHT, thick, 0, 0);
97 m.add_at_edge (X_AXIS, RIGHT, thin, kern, 0);
101 m.add_at_edge (X_AXIS, LEFT, thick, 0, 0);
102 m.add_at_edge (X_AXIS, LEFT, thin, kern, 0);
103 m.add_at_edge (X_AXIS, LEFT, colon, kern, 0);
105 else if (str == "|:")
107 m.add_at_edge (X_AXIS, RIGHT, thick, 0, 0);
108 m.add_at_edge (X_AXIS, RIGHT, thin, kern, 0);
109 m.add_at_edge (X_AXIS, RIGHT, colon, kern, 0);
111 else if (str == ":|:")
113 m.add_at_edge (X_AXIS, LEFT, thick, thinkern, 0);
114 m.add_at_edge (X_AXIS, LEFT, colon, kern, 0);
115 m.add_at_edge (X_AXIS, RIGHT, thick, kern, 0);
116 m.add_at_edge (X_AXIS, RIGHT, colon, kern, 0);
118 else if (str == ".|.")
120 m.add_at_edge (X_AXIS, LEFT, thick, thinkern, 0);
121 m.add_at_edge (X_AXIS, RIGHT, thick, kern, 0);
123 else if (str == "||")
126 should align to other side? this never appears
129 m.add_at_edge (X_AXIS, RIGHT, thin, 0, 0);
130 m.add_at_edge (X_AXIS, RIGHT, thin, thinkern, 0);
134 int c = (Staff_symbol_referencer::line_count (me));
136 for (int i = 0 ; i < c - 1; i++)
138 Real y = (- (c-1.0) / 2 + 0.5 + i * staff_space);
141 d. translate_axis (y,Y_AXIS);
149 Bar_line::simple_barline (Grob *me,
153 Real blot = me->get_paper ()->get_dimension (ly_symbol2scm ("blotdiameter"));
155 return Lookup::round_filled_box (Box (Interval (0,w), Interval (-h/2, h/2)), blot);
158 MAKE_SCHEME_CALLBACK (Bar_line,before_line_breaking ,1);
161 Bar_line::before_line_breaking (SCM smob)
163 Grob*me=unsmob_grob (smob);
164 Item * item = dynamic_cast<Item*> (me);
166 SCM g = me->get_property ("glyph");
168 Direction bsd = item->break_status_dir ();
169 if (scm_is_string (g) && bsd)
171 SCM proc = me->get_property ("break-glyph-function");
172 g = scm_call_2 (proc, g, scm_int2num (bsd));
175 if (!scm_is_string (g))
177 me->set_property ("print-function", SCM_EOL);
178 me->set_extent (SCM_EOL, X_AXIS);
179 // leave y_extent for spanbar?
182 if (! ly_c_equal_p (g, orig))
183 me->set_property ("glyph", g);
185 return SCM_UNSPECIFIED;
191 MAKE_SCHEME_CALLBACK (Bar_line,get_staff_bar_size,1);
193 Bar_line::get_staff_bar_size (SCM smob)
195 Grob*me = unsmob_grob (smob);
196 Real ss = Staff_symbol_referencer::staff_space (me);
197 SCM size = me->get_property ("bar-size");
198 if (scm_is_number (size))
199 return scm_make_real (scm_to_double (size)*ss);
200 else if (Staff_symbol_referencer::get_staff_symbol (me))
203 If there is no staff-symbol, we get -1 from the next
204 calculation. That's a nonsense value, which would collapse the
205 barline so we return 0.0 in the next alternative.
207 return scm_make_real ((Staff_symbol_referencer::line_count (me) -1) * ss);
210 return scm_int2num (0);
215 ADD_INTERFACE (Bar_line, "bar-line-interface",
218 "Print a special bar symbol. It replaces the \n"
219 "regular bar symbol with a special\n"
220 "symbol. The argument @var{bartype} is a string which specifies the\n"
221 "kind of bar to print. Options are @code{:|},\n"
222 "@code{|:}, @code{:|:},\n"
223 "@code{||}, @code{|.},\n"
224 "@code{.|}, and @code{.|.}. \n"
226 "These produce, respectively, a right repeat, a left repeat, a double\n"
227 "repeat, a double bar, a start bar, an end bar, and a thick double bar.\n"
228 "If @var{bartype} is set to @code{empty} then nothing is printed,\n"
229 "but a line break is allowed at that spot.\n",
230 "bar-size-procedure kern thin-kern hair-thickness thick-thickness glyph bar-size break-glyph-function");