2 bar.cc -- implement Bar
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "paper-column.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,brew_molecule,1);
27 Bar::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::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 staffspace = me->paper_l ()->get_var ("staffspace")
57 * Staff_symbol_referencer::staff_space (me);
60 thinkern *= staffline;
64 Molecule thin = simple_barline (me, hair, h);
65 Molecule thick = simple_barline (me, fatline, h);
67 Molecule dot = Font_interface::get_default_font (me)->find_by_name ("dots-dot");
68 Real dist = (2-(Staff_symbol_referencer::line_count (me) & 1))*staffspace;
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::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,before_line_breaking ,1);
137 Bar::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_BOOL_T);
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);
164 set a (pseudo) stem-direction, so we extra space is inserted
165 between stemup and barline.
167 TODO: should check if the barline is the leftmost object of the
173 Grob * col = item->column_l ();
174 SCM dirlist = col->get_grob_property ("dir-list");
175 SCM scmdir = gh_int2scm (-1);
176 if (scm_memq (scmdir, dirlist) == SCM_BOOL_F)
178 dirlist = gh_cons (scmdir, dirlist);
179 col->set_grob_property ("dir-list", dirlist);
183 return SCM_UNSPECIFIED;
187 Bar::set_interface (Grob*me)
189 me->set_interface (ly_symbol2scm ("bar-line-interface"));
193 Bar::has_interface (Grob*m)
195 return m && m->has_interface (ly_symbol2scm ("bar-line-interface"));
199 MAKE_SCHEME_CALLBACK (Bar,get_staff_bar_size,1);
201 Bar::get_staff_bar_size (SCM smob)
203 Grob*me = unsmob_grob (smob);
204 Real ss = Staff_symbol_referencer::staff_space (me);
205 SCM size = me->get_grob_property ("bar-size");
206 if (gh_number_p (size))
207 return gh_double2scm (gh_scm2double (size)*ss);
208 else if (Staff_symbol_referencer::staff_symbol_l (me))
211 If there is no staff-symbol, we get -1 from the next
212 calculation. That's a nonsense value, which would collapse the
213 barline so we return 0.0 in the next alternative.
215 return gh_double2scm ((Staff_symbol_referencer::line_count (me) -1) * ss);
218 return gh_int2scm (0);