2 bar.cc -- implement Bar
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "paper-column.hh"
14 #include "bar-line.hh"
16 #include "molecule.hh"
17 #include "paper-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,brew_molecule,1);
27 Bar_line::brew_molecule (SCM smob)
29 Grob * me = unsmob_grob (smob);
31 SCM s = me->get_grob_property ("glyph");
32 SCM barsiz_proc = me->get_grob_property ("bar-size-procedure");
33 if (gh_string_p (s) && gh_procedure_p (barsiz_proc))
35 String str =ly_scm2string (s);
36 SCM siz = gh_call1 (barsiz_proc, me->self_scm ());
37 Real sz = gh_scm2double (siz);
41 return compound_barline (me, str, sz).smobbed_copy ();
48 Bar_line::compound_barline (Grob*me, String str, Real h)
50 Real kern = gh_scm2double (me->get_grob_property ("kern"));
51 Real thinkern = gh_scm2double (me->get_grob_property ("thin-kern"));
52 Real hair = gh_scm2double (me->get_grob_property ("hair-thickness"));
53 Real fatline = gh_scm2double (me->get_grob_property ("thick-thickness"));
55 Real staffline = me->paper_l ()->get_var ("stafflinethickness");
56 Real staff_space = Staff_symbol_referencer::staff_space (me);
57 Real staffspace = me->paper_l ()->get_var ("staffspace")
61 thinkern *= staffline;
65 Molecule thin = simple_barline (me, hair, h);
66 Molecule thick = simple_barline (me, fatline, h);
68 Molecule dot = Font_interface::get_default_font (me)->find_by_name ("dots-dot");
69 Real dist = ( Staff_symbol_referencer::line_count (me) & 1 ? 1 :
70 staff_space<2 ? 2 : .5 ) * staffspace;
71 dot.translate_axis(dist/2,Y_AXIS);
72 colon.add_molecule(dot);
73 dot.translate_axis(-dist,Y_AXIS);
74 colon.add_molecule(dot);
80 return Lookup::blank (Box (Interval (0, 0), Interval (-h/2, h/2)));
86 else if (str == "|." || (h == 0 && str == ":|"))
88 m.add_at_edge (X_AXIS, LEFT, thick, 0);
89 m.add_at_edge (X_AXIS, LEFT, thin, kern);
91 else if (str == ".|" || (h == 0 && str == "|:"))
93 m.add_at_edge (X_AXIS, RIGHT, thick, 0);
94 m.add_at_edge (X_AXIS, RIGHT, thin, kern);
98 m.add_at_edge (X_AXIS, LEFT, thick, 0);
99 m.add_at_edge (X_AXIS, LEFT, thin, kern);
100 m.add_at_edge (X_AXIS, LEFT, colon, kern);
102 else if (str == "|:")
104 m.add_at_edge (X_AXIS, RIGHT, thick, 0);
105 m.add_at_edge (X_AXIS, RIGHT, thin, kern);
106 m.add_at_edge (X_AXIS, RIGHT, colon, kern);
108 else if (str == ":|:")
110 m.add_at_edge (X_AXIS, LEFT, thick, thinkern);
111 m.add_at_edge (X_AXIS, LEFT, colon, kern);
112 m.add_at_edge (X_AXIS, RIGHT, thick, kern);
113 m.add_at_edge (X_AXIS, RIGHT, colon, kern);
115 else if (str == ".|.")
117 m.add_at_edge (X_AXIS, LEFT, thick, thinkern);
118 m.add_at_edge (X_AXIS, RIGHT, thick, kern);
120 else if (str == "||")
122 m.add_at_edge (X_AXIS, RIGHT, thin, 0);
123 m.add_at_edge (X_AXIS, RIGHT, thin, thinkern);
131 Bar_line::simple_barline (Grob*,Real w, Real h)
133 return Lookup::filledbox (Box (Interval (0,w), Interval (-h/2, h/2)));
136 MAKE_SCHEME_CALLBACK (Bar_line,before_line_breaking ,1);
139 Bar_line::before_line_breaking (SCM smob)
141 Grob*me=unsmob_grob (smob);
142 Item * item = dynamic_cast<Item*> (me);
144 SCM g = me->get_grob_property ("glyph");
146 Direction bsd = item->break_status_dir ();
147 if (gh_string_p (g) && bsd)
149 SCM proc = me->get_grob_property ("break-glyph-function");
150 g = gh_call2 (proc, g, gh_int2scm (bsd));
154 if (!gh_string_p (g))
156 me->set_grob_property ("molecule-callback", SCM_EOL);
157 me->set_extent_callback (SCM_EOL, X_AXIS);
158 // leave y_extent for spanbar?
161 if (! gh_equal_p (g, orig))
162 me->set_grob_property ("glyph", g);
164 return SCM_UNSPECIFIED;
169 Bar_line::has_interface (Grob*m)
171 return m && m->has_interface (ly_symbol2scm ("bar-line-interface"));
175 MAKE_SCHEME_CALLBACK (Bar_line,get_staff_bar_size,1);
177 Bar_line::get_staff_bar_size (SCM smob)
179 Grob*me = unsmob_grob (smob);
180 Real ss = Staff_symbol_referencer::staff_space (me);
181 SCM size = me->get_grob_property ("bar-size");
182 if (gh_number_p (size))
183 return gh_double2scm (gh_scm2double (size)*ss);
184 else if (Staff_symbol_referencer::staff_symbol_l (me))
187 If there is no staff-symbol, we get -1 from the next
188 calculation. That's a nonsense value, which would collapse the
189 barline so we return 0.0 in the next alternative.
191 return gh_double2scm ((Staff_symbol_referencer::line_count (me) -1) * ss);
194 return gh_int2scm (0);
199 ADD_INTERFACE (Bar_line, "bar-line-interface",
202 This is a request to print a special bar symbol. It replaces the
203 regular bar symbol with a special
204 symbol. The argument @var{bartype} is a string which specifies the
205 kind of bar to print. Options are @code{:|}
206 @cindex |A@@@code{:|}
209 @cindex |B@@@code{|:}
211 @cindex |C@@@code{:|:}
214 @cindex |D@@@code{||}
216 @cindex |E@@@code{|.}
219 @cindex |F@@@code{.|}
221 @cindex |G@@@code{.|.}
224 These produce, respectively, a right repeat, a left repeat, a double
225 repeat, a double bar, a start bar, an end bar, and a thick double bar.
226 If @var{bartype} is set to @code{empty} then nothing is printed,
227 but a line break is allowed at that spot.
230 "bar-size-procedure kern thin-kern hair-thickness thick-thickness glyph bar-size break-glyph-function");