2 system-start-delimiter.cc -- implement System_start_delimiter
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "axis-group-interface.hh"
12 #include "system-start-delimiter.hh"
13 #include "paper-def.hh"
14 #include "molecule.hh"
15 #include "font-interface.hh"
16 #include "all-font-metrics.hh"
18 #include "staff-symbol-referencer.hh"
22 System_start_delimiter::staff_bracket (Grob
*me
,Real height
)
24 Real arc_height
= gh_scm2double (me
->get_grob_property ("arch-height")) ;
26 SCM at
= scm_list_n (ly_symbol2scm ("bracket"),
27 me
->get_grob_property ("arch-angle"),
28 me
->get_grob_property ("arch-width"),
29 gh_double2scm (arc_height
),
30 gh_double2scm (height
),
31 me
->get_grob_property ("arch-thick"),
32 me
->get_grob_property ("thickness"),
39 In system-start-delimiter.cc I see the line
41 Real h = height + 2 * arc_height;
43 But I really think that you mean
45 Real h = height + 2 * arc_width;
47 (arc_height changes the x-axis-size of arc ; arc_width changes the
49 Will not fix it since I'm not sure.
53 Real h
= height
+ 2 * arc_height
;
54 Box
b (Interval (0, 1.5), Interval (-h
/2, h
/2));
56 mol
.align_to (X_AXIS
, CENTER
);
63 System_start_delimiter::simple_bar (Grob
*me
,Real h
)
65 Real w
= me
->get_paper ()->get_var ("linethickness") *
66 gh_scm2double (me
->get_grob_property ("thickness"));
67 return Lookup::filledbox (Box (Interval (0,w
), Interval (-h
/2, h
/2)));
70 MAKE_SCHEME_CALLBACK (System_start_delimiter
,after_line_breaking
,1);
73 System_start_delimiter::after_line_breaking (SCM smob
)
75 Grob
* me
= unsmob_grob (smob
);
76 SCM gl
= me
->get_grob_property ("glyph");
78 if (scm_ilength (me
->get_grob_property ("elements")) <= 1
79 && gh_equal_p (gl
,scm_makfrom0str ("bar-line")))
84 return SCM_UNSPECIFIED
;
88 MAKE_SCHEME_CALLBACK (System_start_delimiter
,brew_molecule
,1);
90 System_start_delimiter::brew_molecule (SCM smob
)
92 Grob
* me
= unsmob_grob (smob
);
94 SCM s
= me
->get_grob_property ("glyph");
97 SCM gsym
= scm_string_to_symbol (s
) ;
98 SCM c
= me
->get_grob_property ("collapse-height");
100 Real staff_space
= Staff_symbol_referencer::staff_space (me
);
101 Interval ext
= ly_scm2interval (Axis_group_interface::group_extent_callback
102 (me
->self_scm (), gh_int2scm (Y_AXIS
)));
103 Real l
= ext
.length () / staff_space
;
106 || (gh_number_p (c
) && l
<= gh_scm2double (c
)))
114 if (gsym
== ly_symbol2scm ("bracket"))
115 m
= staff_bracket (me
,l
);
116 else if (gsym
== ly_symbol2scm ("brace"))
117 m
= staff_brace (me
,l
);
118 else if (gsym
== ly_symbol2scm ("bar-line"))
119 m
= simple_bar (me
,l
);
121 m
.translate_axis (ext
.center (), Y_AXIS
);
122 return m
.smobbed_copy ();
126 System_start_delimiter::staff_brace (Grob
*me
, Real y
)
130 /* We go through the style sheet to lookup the font file
131 name. This is better than using find_font directly,
132 esp. because that triggers mktextfm for non-existent
134 SCM br
= ly_symbol2scm ("braces");
135 SCM fam
= gh_cons (ly_symbol2scm ("font-family"), br
);
136 SCM sz
= gh_cons (ly_symbol2scm ("font-relative-size"), ly_symbol2scm ("*"));
138 SCM alist
= scm_list_n (fam
, sz
, SCM_UNDEFINED
);
139 fm
= Font_interface::get_font (me
, scm_list_n (alist
, SCM_UNDEFINED
));
144 int hi
= (fm
->count () - 1) >? 2;
147 /* do a binary search for each Y, not very efficient, but passable? */
150 int cmp
= (lo
+ hi
) / 2;
151 b
= fm
->get_char (cmp
);
152 if (b
[Y_AXIS
].empty_b () || b
[Y_AXIS
].length () > y
)
159 Molecule
m (fm
->get_char_molecule (lo
));
161 b
[X_AXIS
] = Interval (0,0);
163 return Molecule (b
, m
.get_expr());
169 ADD_INTERFACE (System_start_delimiter
,"system-start-delimiter-interface",
170 "#'style can be bar-line, bracket or brace",
171 "collapse-height thickness arch-height arch-angle arch-thick arch-width bracket-thick glyph");