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>
13 #include "all-font-metrics.hh"
14 #include "font-interface.hh"
16 #include "output-def.hh"
17 #include "paper-column.hh"
18 #include "staff-symbol-referencer.hh"
20 MAKE_SCHEME_CALLBACK (Bar_line, print, 1);
23 Bar_line::print (SCM smob)
25 Grob *me = unsmob_grob (smob);
27 SCM s = me->get_property ("glyph");
28 SCM barsiz_proc = me->get_property ("bar-size-procedure");
29 if (scm_is_string (s) && ly_is_procedure (barsiz_proc))
31 String str = ly_scm2string (s);
32 SCM siz = scm_call_1 (barsiz_proc, me->self_scm ());
33 Real sz = robust_scm2double (siz, 0);
37 return compound_barline (me, str, sz, false).smobbed_copy ();
43 Bar_line::compound_barline (Grob *me, String str, Real h,
46 Real kern = robust_scm2double (me->get_property ("kern"), 1);
47 Real thinkern = robust_scm2double (me->get_property ("thin-kern"), 1);
48 Real hair = robust_scm2double (me->get_property ("hair-thickness"), 1);
49 Real fatline = robust_scm2double (me->get_property ("thick-thickness"), 1);
51 Real staffline = me->get_layout ()->get_dimension (ly_symbol2scm ("linethickness"));
52 Real staff_space = Staff_symbol_referencer::staff_space (me);
55 thinkern *= staffline;
59 Stencil thin = simple_barline (me, hair, h, rounded);
60 Stencil thick = simple_barline (me, fatline, h, rounded);
61 Stencil dot = Font_interface::get_default_font (me)->find_by_name ("dots.dot");
63 int lines = Staff_symbol_referencer::line_count (me);
65 = ((lines & 1 || lines == 0)
67 : (staff_space < 2 ? 2 : .5)) * staff_space;
69 colon.translate_axis (dist, Y_AXIS);
70 colon.add_stencil (dot);
71 colon.translate_axis (-dist / 2, Y_AXIS);
78 return Lookup::blank (Box (Interval (0, 0), Interval (-h / 2, h / 2)));
81 else if (str == "|." || (h == 0 && str == ":|"))
83 m.add_at_edge (X_AXIS, LEFT, thick, 0, 0);
84 m.add_at_edge (X_AXIS, LEFT, thin, kern, 0);
86 else if (str == ".|" || (h == 0 && str == "|:"))
88 m.add_at_edge (X_AXIS, RIGHT, thick, 0, 0);
89 m.add_at_edge (X_AXIS, RIGHT, thin, kern, 0);
93 m.add_at_edge (X_AXIS, LEFT, thick, 0, 0);
94 m.add_at_edge (X_AXIS, LEFT, thin, kern, 0);
95 m.add_at_edge (X_AXIS, LEFT, colon, kern, 0);
99 m.add_at_edge (X_AXIS, RIGHT, thick, 0, 0);
100 m.add_at_edge (X_AXIS, RIGHT, thin, kern, 0);
101 m.add_at_edge (X_AXIS, RIGHT, colon, kern, 0);
103 else if (str == ":|:")
105 m.add_at_edge (X_AXIS, LEFT, thick, thinkern, 0);
106 m.add_at_edge (X_AXIS, LEFT, colon, kern, 0);
107 m.add_at_edge (X_AXIS, RIGHT, thick, kern, 0);
108 m.add_at_edge (X_AXIS, RIGHT, colon, kern, 0);
110 else if (str == ".|.")
112 m.add_at_edge (X_AXIS, LEFT, thick, thinkern, 0);
113 m.add_at_edge (X_AXIS, RIGHT, thick, kern, 0);
115 else if (str == "||")
118 should align to other side? this never appears
121 m.add_at_edge (X_AXIS, RIGHT, thin, 0, 0);
122 m.add_at_edge (X_AXIS, RIGHT, thin, thinkern, 0);
126 int c = (Staff_symbol_referencer::line_count (me));
128 for (int i = 0; i < c - 1; i++)
130 Real y = (- (c - 1.0) / 2 + 0.5 + i * staff_space);
133 d.translate_axis (y, Y_AXIS);
141 Bar_line::simple_barline (Grob *me,
148 ? me->get_layout ()->get_dimension (ly_symbol2scm ("blotdiameter"))
151 return Lookup::round_filled_box (Box (Interval (0, w),
152 Interval (-h / 2, h / 2)), blot);
155 MAKE_SCHEME_CALLBACK (Bar_line, before_line_breaking, 1);
158 Bar_line::before_line_breaking (SCM smob)
160 Grob *me = unsmob_grob (smob);
161 Item *item = dynamic_cast<Item *> (me);
163 SCM g = me->get_property ("glyph");
165 Direction bsd = item->break_status_dir ();
166 if (scm_is_string (g) && bsd)
168 SCM proc = me->get_property ("break-glyph-function");
169 g = scm_call_2 (proc, g, scm_from_int (bsd));
172 if (!scm_is_string (g))
174 me->set_property ("print-function", SCM_EOL);
175 me->set_extent (SCM_EOL, X_AXIS);
176 // leave y_extent for spanbar?
179 if (! ly_is_equal (g, orig))
180 me->set_property ("glyph", g);
182 return SCM_UNSPECIFIED;
185 MAKE_SCHEME_CALLBACK (Bar_line, get_staff_bar_size, 1);
187 Bar_line::get_staff_bar_size (SCM smob)
189 Grob *me = unsmob_grob (smob);
190 Real ss = Staff_symbol_referencer::staff_space (me);
191 SCM size = me->get_property ("bar-size");
192 if (scm_is_number (size))
193 return scm_from_double (scm_to_double (size) * ss);
194 else if (Staff_symbol_referencer::get_staff_symbol (me))
197 If there is no staff-symbol, we get -1 from the next
198 calculation. That's a nonsense value, which would collapse the
199 barline so we return 0.0 in the next alternative.
201 Real ysize = (Staff_symbol_referencer::line_count (me) -1);
202 ysize = ysize * ss + Staff_symbol_referencer::line_thickness (me);
203 return scm_from_double (ysize);
205 return scm_from_int (0);
208 ADD_INTERFACE (Bar_line, "bar-line-interface",
211 "Print a special bar symbol. It replaces the \n"
212 "regular bar symbol with a special\n"
213 "symbol. The argument @var{bartype} is a string which specifies the\n"
214 "kind of bar to print. Options are @code{:|}, \n"
215 "@code{|:}, @code{:|:},\n"
216 "@code{||}, @code{|.},\n"
217 "@code{.|}, and @code{.|.}. \n"
219 "These produce, respectively, a right repeat, a left repeat, a double\n"
220 "repeat, a double bar, a start bar, an end bar, and a thick double bar.\n"
221 "If @var{bartype} is set to @code{empty} then nothing is printed,\n"
222 "but a line break is allowed at that spot.\n",
223 "bar-size-procedure kern thin-kern hair-thickness thick-thickness glyph bar-size break-glyph-function");