2 system-start-delimiter.cc -- implement System_start_delimiter
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2002 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);
62 System_start_delimiter::has_interface (Grob*me)
64 return me->has_interface (ly_symbol2scm ("system-start-delimiter-interface"));
68 System_start_delimiter::simple_bar (Grob*me,Real h)
70 Real w = me->paper_l ()->get_var ("stafflinethickness") *
71 gh_scm2double (me->get_grob_property ("thickness"));
72 return Lookup::filledbox (Box (Interval (0,w), Interval (-h/2, h/2)));
75 MAKE_SCHEME_CALLBACK (System_start_delimiter,after_line_breaking,1);
78 System_start_delimiter::after_line_breaking (SCM smob)
80 Grob * me = unsmob_grob (smob);
81 SCM gl = me->get_grob_property ("glyph");
83 if (scm_ilength (me->get_grob_property ("elements")) <= 1
84 && gh_equal_p (gl,ly_str02scm ("bar-line")))
89 return SCM_UNSPECIFIED;
93 MAKE_SCHEME_CALLBACK (System_start_delimiter,brew_molecule,1);
95 System_start_delimiter::brew_molecule (SCM smob)
97 Grob * me = unsmob_grob (smob);
99 SCM s = me->get_grob_property ("glyph");
100 if (!gh_string_p (s))
102 SCM gsym = scm_string_to_symbol (s) ;
103 SCM c = me->get_grob_property ("collapse-height");
105 Real staff_space = Staff_symbol_referencer::staff_space (me);
106 Interval ext = ly_scm2interval (Axis_group_interface::group_extent_callback
107 (me->self_scm (), gh_int2scm (Y_AXIS)));
108 Real l = ext.length () / staff_space;
111 || (gh_number_p (c) && l <= gh_scm2double (c)))
119 if (gsym== ly_symbol2scm ("bracket"))
120 m = staff_bracket (me,l);
121 else if (gsym == ly_symbol2scm ("brace"))
122 m = staff_brace (me,l);
123 else if (gsym == ly_symbol2scm ("bar-line"))
124 m = simple_bar (me,l);
126 m.translate_axis (ext.center (), Y_AXIS);
127 return m.smobbed_copy ();
131 System_start_delimiter::staff_brace (Grob*me, Real y)
135 for (int i = 0; ; i++)
137 if (!fm || y > fm->get_char (fm->count ()-1)[Y_AXIS].length ())
139 /* We go through the style sheet to lookup the font file
140 name. This is better than using find_font directly,
141 esp. because that triggers mktextfm for non-existent
143 SCM br = ly_symbol2scm ("braces");
144 SCM fam = gh_cons (ly_symbol2scm ("font-family"), br);
145 SCM sz = gh_cons (ly_symbol2scm ("font-relative-size"), gh_int2scm (i));
147 SCM alist = scm_list_n (fam, sz, SCM_UNDEFINED);
148 fm = Font_interface::get_font (me, scm_list_n (alist, SCM_UNDEFINED));
149 /* Hmm, if lookup fails, we get cmr10 anyway */
150 if (ly_scm2string (ly_car (fm->description_)) == "cmr10")
159 int hi = (fm->count () - 1) >? 2;
162 /* do a binary search for each Y, not very efficient, but passable? */
165 int cmp = (lo + hi) / 2;
166 b = fm->get_char (cmp);
167 if (b[Y_AXIS].empty_b () || b[Y_AXIS].length () > y)
174 SCM at = scm_list_n (ly_symbol2scm ("char"), gh_int2scm (lo), SCM_UNDEFINED);
175 at = fontify_atom (fm, at);
177 b = fm->get_char (lo);
178 b[X_AXIS] = Interval (0,0);
180 return Molecule (b, at);
186 ADD_INTERFACE (System_start_delimiter,"system-start-delimiter-interface",
187 "#'style can be bar-line, bracket or brace",
188 "bar-line-collapse-height brace-collapse-height bracket-collapse-height thickness arch-height arch-angle arch-thick arch-width bracket-thick glyph");