2 custos.cc -- implement Custos
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2003 Juergen Reuter <reuter@ipd.uka.de>
11 - do not show if a clef change immediately follows in the next line
13 - decide: do or do not print custos if the next line starts with a rest
19 #include "direction.hh"
20 #include "staff-symbol-referencer.hh"
22 #include "molecule.hh"
24 #include "note-head.hh"
26 #include "font-interface.hh"
27 #include "math.h" // rint
29 MAKE_SCHEME_CALLBACK (Custos
,brew_molecule
,1);
31 Custos::brew_molecule (SCM smob
)
33 Item
*me
= (Item
*)unsmob_grob (smob
);
35 SCM scm_style
= me
->get_grob_property ("style");
37 if (gh_symbol_p (scm_style
))
39 style
= ly_symbol2string (scm_style
);
47 * Shall we use a common custos font character regardless if on
48 * staffline or not, or shall we use individual font characters
52 = to_boolean (me
->get_grob_property ("adjust-if-on-staffline"));
55 SCM ntr_pos
= me
->get_grob_property ("neutral-position");
56 if (gh_number_p (ntr_pos
))
57 neutral_pos
= gh_scm2int (ntr_pos
);
61 Direction neutral_direction
=
62 to_dir (me
->get_grob_property ("neutral-direction"));
64 int pos
= (int)rint (Staff_symbol_referencer::get_position (me
));
65 int sz
= Staff_symbol_referencer::line_count (me
)-1;
67 String font_char
= "custodes-" + style
+ "-";
68 if (pos
< neutral_pos
)
70 else if (pos
> neutral_pos
)
72 else if (neutral_direction
== UP
)
74 else if (neutral_direction
== DOWN
)
76 else // auto direction; not yet supported -> use "d"
81 font_char
+= (((pos
^ sz
) & 0x1) == 0) ? "1" : "0";
89 = Font_interface::get_default_font (me
)->find_by_name (font_char
);
90 if (molecule
.is_empty ())
92 me
->warning (_f ("custos `%s' not found", font_char
));
98 int pos
= (int)rint (Staff_symbol_referencer::get_position (me
));
99 int interspaces
= Staff_symbol_referencer::line_count (me
)-1;
100 if (abs (pos
) - interspaces
> 1)
102 Molecule ledger_lines
=
103 Note_head::brew_ledger_lines (me
, pos
, interspaces
,
104 molecule
.extent (X_AXIS
), true);
105 molecule
.add_molecule (ledger_lines
);
107 return molecule
.smobbed_copy ();
111 ADD_INTERFACE (Custos
, "custos-interface",
113 "style adjust-if-on-staffline neutral-direction neutral-position");