2 bar-line.cc -- implement Bar_line
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "all-font-metrics.hh"
12 #include "font-interface.hh"
14 #include "output-def.hh"
15 #include "paper-column.hh"
16 #include "staff-symbol-referencer.hh"
18 MAKE_SCHEME_CALLBACK (Bar_line, print, 1);
21 Bar_line::print (SCM smob)
23 Grob *me = unsmob_grob (smob);
25 SCM s = me->get_property ("glyph");
26 SCM barsiz_proc = me->get_property ("bar-size-procedure");
27 if (scm_is_string (s) && ly_is_procedure (barsiz_proc))
29 String str = ly_scm2string (s);
30 SCM siz = scm_call_1 (barsiz_proc, me->self_scm ());
31 Real sz = robust_scm2double (siz, 0);
35 return compound_barline (me, str, sz, false).smobbed_copy ();
41 Bar_line::compound_barline (Grob *me, String str, Real h,
44 Real kern = robust_scm2double (me->get_property ("kern"), 1);
45 Real thinkern = robust_scm2double (me->get_property ("thin-kern"), 1);
46 Real hair = robust_scm2double (me->get_property ("hair-thickness"), 1);
47 Real fatline = robust_scm2double (me->get_property ("thick-thickness"), 1);
49 Real staffline = me->get_layout ()->get_dimension (ly_symbol2scm ("linethickness"));
50 Real staff_space = Staff_symbol_referencer::staff_space (me);
53 thinkern *= staffline;
57 Stencil thin = simple_barline (me, hair, h, rounded);
58 Stencil thick = simple_barline (me, fatline, h, rounded);
59 Stencil dot = Font_interface::get_default_font (me)->find_by_name ("dots.dot");
61 int lines = Staff_symbol_referencer::line_count (me);
63 = ((lines & 1 || lines == 0)
65 : (staff_space < 2 ? 2 : .5)) * staff_space;
67 colon.translate_axis (dist, Y_AXIS);
68 colon.add_stencil (dot);
69 colon.translate_axis (-dist / 2, Y_AXIS);
76 return Lookup::blank (Box (Interval (0, 0), Interval (-h / 2, h / 2)));
79 else if (str == "|." || (h == 0 && str == ":|"))
81 m.add_at_edge (X_AXIS, LEFT, thick, 0, 0);
82 m.add_at_edge (X_AXIS, LEFT, thin, kern, 0);
84 else if (str == ".|" || (h == 0 && str == "|:"))
86 m.add_at_edge (X_AXIS, RIGHT, thick, 0, 0);
87 m.add_at_edge (X_AXIS, RIGHT, thin, kern, 0);
91 m.add_at_edge (X_AXIS, LEFT, thick, 0, 0);
92 m.add_at_edge (X_AXIS, LEFT, thin, kern, 0);
93 m.add_at_edge (X_AXIS, LEFT, colon, kern, 0);
97 m.add_at_edge (X_AXIS, RIGHT, thick, 0, 0);
98 m.add_at_edge (X_AXIS, RIGHT, thin, kern, 0);
99 m.add_at_edge (X_AXIS, RIGHT, colon, kern, 0);
101 else if (str == ":|:")
103 m.add_at_edge (X_AXIS, LEFT, thick, thinkern, 0);
104 m.add_at_edge (X_AXIS, LEFT, colon, kern, 0);
105 m.add_at_edge (X_AXIS, RIGHT, thick, kern, 0);
106 m.add_at_edge (X_AXIS, RIGHT, colon, kern, 0);
108 else if (str == ".|.")
110 m.add_at_edge (X_AXIS, LEFT, thick, thinkern, 0);
111 m.add_at_edge (X_AXIS, RIGHT, thick, kern, 0);
113 else if (str == "||")
116 should align to other side? this never appears
119 m.add_at_edge (X_AXIS, RIGHT, thin, 0, 0);
120 m.add_at_edge (X_AXIS, RIGHT, thin, thinkern, 0);
124 int c = (Staff_symbol_referencer::line_count (me));
126 for (int i = 0; i < c - 1; i++)
128 Real y = (- (c - 1.0) / 2 + 0.5 + i * staff_space);
131 d.translate_axis (y, Y_AXIS);
139 Bar_line::simple_barline (Grob *me,
146 ? me->get_layout ()->get_dimension (ly_symbol2scm ("blotdiameter"))
149 return Lookup::round_filled_box (Box (Interval (0, w),
150 Interval (-h / 2, h / 2)), blot);
153 MAKE_SCHEME_CALLBACK (Bar_line, before_line_breaking, 1);
156 Bar_line::before_line_breaking (SCM smob)
158 Grob *me = unsmob_grob (smob);
159 Item *item = dynamic_cast<Item *> (me);
161 SCM g = me->get_property ("glyph");
163 Direction bsd = item->break_status_dir ();
164 if (scm_is_string (g) && bsd)
166 SCM proc = me->get_property ("break-glyph-function");
167 g = scm_call_2 (proc, g, scm_from_int (bsd));
170 if (!scm_is_string (g))
172 me->set_property ("print-function", SCM_EOL);
173 me->set_extent (SCM_EOL, X_AXIS);
174 // leave y_extent for spanbar?
177 if (! ly_is_equal (g, orig))
178 me->set_property ("glyph", g);
180 return SCM_UNSPECIFIED;
183 MAKE_SCHEME_CALLBACK (Bar_line, get_staff_bar_size, 1);
185 Bar_line::get_staff_bar_size (SCM smob)
187 Grob *me = unsmob_grob (smob);
188 Real ss = Staff_symbol_referencer::staff_space (me);
189 SCM size = me->get_property ("bar-size");
190 if (scm_is_number (size))
191 return scm_from_double (scm_to_double (size) * ss);
192 else if (Staff_symbol_referencer::get_staff_symbol (me))
195 If there is no staff-symbol, we get -1 from the next
196 calculation. That's a nonsense value, which would collapse the
197 barline so we return 0.0 in the next alternative.
199 Real ysize = (Staff_symbol_referencer::line_count (me) -1);
200 ysize = ysize * ss + Staff_symbol_referencer::line_thickness (me);
201 return scm_from_double (ysize);
203 return scm_from_int (0);
206 ADD_INTERFACE (Bar_line, "bar-line-interface",
209 "Print a special bar symbol. It replaces the \n"
210 "regular bar symbol with a special\n"
211 "symbol. The argument @var{bartype} is a string which specifies the\n"
212 "kind of bar to print. Options are @code{:|}, \n"
213 "@code{|:}, @code{:|:},\n"
214 "@code{||}, @code{|.},\n"
215 "@code{.|}, and @code{.|.}. \n"
217 "These produce, respectively, a right repeat, a left repeat, a double\n"
218 "repeat, a double bar, a start bar, an end bar, and a thick double bar.\n"
219 "If @var{bartype} is set to @code{empty} then nothing is printed,\n"
220 "but a line break is allowed at that spot.\n",
221 "bar-size-procedure kern thin-kern hair-thickness thick-thickness glyph bar-size break-glyph-function");