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 ("linethickness");
56 Real staff_space = Staff_symbol_referencer::staff_space (me);
59 thinkern *= staffline;
63 Molecule thin = simple_barline (me, hair, h);
64 Molecule thick = simple_barline (me, fatline, h);
66 Molecule dot = Font_interface::get_default_font (me)->find_by_name ("dots-dot");
67 Real dist = ( Staff_symbol_referencer::line_count (me) & 1 ? 1 :
68 (staff_space<2 ? 2 : .5) ) * staff_space;
69 dot.translate_axis(dist/2,Y_AXIS);
70 colon.add_molecule(dot);
71 dot.translate_axis(-dist,Y_AXIS);
72 colon.add_molecule(dot);
78 return Lookup::blank (Box (Interval (0, 0), Interval (-h/2, h/2)));
84 else if (str == "|." || (h == 0 && str == ":|"))
86 m.add_at_edge (X_AXIS, LEFT, thick, 0);
87 m.add_at_edge (X_AXIS, LEFT, thin, kern);
89 else if (str == ".|" || (h == 0 && str == "|:"))
91 m.add_at_edge (X_AXIS, RIGHT, thick, 0);
92 m.add_at_edge (X_AXIS, RIGHT, thin, kern);
96 m.add_at_edge (X_AXIS, LEFT, thick, 0);
97 m.add_at_edge (X_AXIS, LEFT, thin, kern);
98 m.add_at_edge (X_AXIS, LEFT, colon, kern);
100 else if (str == "|:")
102 m.add_at_edge (X_AXIS, RIGHT, thick, 0);
103 m.add_at_edge (X_AXIS, RIGHT, thin, kern);
104 m.add_at_edge (X_AXIS, RIGHT, colon, kern);
106 else if (str == ":|:")
108 m.add_at_edge (X_AXIS, LEFT, thick, thinkern);
109 m.add_at_edge (X_AXIS, LEFT, colon, kern);
110 m.add_at_edge (X_AXIS, RIGHT, thick, kern);
111 m.add_at_edge (X_AXIS, RIGHT, colon, kern);
113 else if (str == ".|.")
115 m.add_at_edge (X_AXIS, LEFT, thick, thinkern);
116 m.add_at_edge (X_AXIS, RIGHT, thick, kern);
118 else if (str == "||")
120 m.add_at_edge (X_AXIS, RIGHT, thin, 0);
121 m.add_at_edge (X_AXIS, RIGHT, thin, thinkern);
129 Bar_line::simple_barline (Grob*,Real w, Real h)
131 return Lookup::filledbox (Box (Interval (0,w), Interval (-h/2, h/2)));
134 MAKE_SCHEME_CALLBACK (Bar_line,before_line_breaking ,1);
137 Bar_line::before_line_breaking (SCM smob)
139 Grob*me=unsmob_grob (smob);
140 Item * item = dynamic_cast<Item*> (me);
142 SCM g = me->get_grob_property ("glyph");
144 Direction bsd = item->break_status_dir ();
145 if (gh_string_p (g) && bsd)
147 SCM proc = me->get_grob_property ("break-glyph-function");
148 g = gh_call2 (proc, g, gh_int2scm (bsd));
152 if (!gh_string_p (g))
154 me->set_grob_property ("molecule-callback", SCM_EOL);
155 me->set_extent_callback (SCM_EOL, X_AXIS);
156 // leave y_extent for spanbar?
159 if (! gh_equal_p (g, orig))
160 me->set_grob_property ("glyph", g);
162 return SCM_UNSPECIFIED;
167 Bar_line::has_interface (Grob*m)
169 return m && m->has_interface (ly_symbol2scm ("bar-line-interface"));
173 MAKE_SCHEME_CALLBACK (Bar_line,get_staff_bar_size,1);
175 Bar_line::get_staff_bar_size (SCM smob)
177 Grob*me = unsmob_grob (smob);
178 Real ss = Staff_symbol_referencer::staff_space (me);
179 SCM size = me->get_grob_property ("bar-size");
180 if (gh_number_p (size))
181 return gh_double2scm (gh_scm2double (size)*ss);
182 else if (Staff_symbol_referencer::staff_symbol_l (me))
185 If there is no staff-symbol, we get -1 from the next
186 calculation. That's a nonsense value, which would collapse the
187 barline so we return 0.0 in the next alternative.
189 return gh_double2scm ((Staff_symbol_referencer::line_count (me) -1) * ss);
192 return gh_int2scm (0);
197 ADD_INTERFACE (Bar_line, "bar-line-interface",
200 This is a request to print a special bar symbol. It replaces the
201 regular bar symbol with a special
202 symbol. The argument @var{bartype} is a string which specifies the
203 kind of bar to print. Options are @code{:|}
204 @cindex |A@@@code{:|}
207 @cindex |B@@@code{|:}
209 @cindex |C@@@code{:|:}
212 @cindex |D@@@code{||}
214 @cindex |E@@@code{|.}
217 @cindex |F@@@code{.|}
219 @cindex |G@@@code{.|.}
222 These produce, respectively, a right repeat, a left repeat, a double
223 repeat, a double bar, a start bar, an end bar, and a thick double bar.
224 If @var{bartype} is set to @code{empty} then nothing is printed,
225 but a line break is allowed at that spot.
228 "bar-size-procedure kern thin-kern hair-thickness thick-thickness glyph bar-size break-glyph-function");