2 system-start-delimiter.cc -- implement System_start_delimiter
4 source file of the GNU LilyPond music typesetter
6 (c) 2000 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"
17 #include "score-element.hh"
21 System_start_delimiter::staff_bracket (Score_element*me,Real height)
23 Paper_def* p= me->paper_l ();
24 Real arc_height = gh_scm2double (me->get_elt_property("arch-height")) ;
26 SCM at = gh_list (ly_symbol2scm ("bracket"),
27 me->get_elt_property ("arch-angle"),
28 me->get_elt_property ("arch-width"),
29 gh_double2scm (arc_height),
30 me->get_elt_property ("bracket-width"),
31 gh_double2scm (height),
32 me->get_elt_property ("arch-thick"),
33 me->get_elt_property ("bracket-thick"),
36 Real h = height + 2 * arc_height;
37 Box b (Interval (0, 1.5), Interval (-h/2, h/2));
39 mol.align_to (X_AXIS, CENTER);
44 System_start_delimiter::set_interface (Score_element*me)
46 me->set_interface (ly_symbol2scm ("system-start-delimiter-interface"));
50 System_start_delimiter::has_interface (Score_element*me)
52 return me->has_interface (ly_symbol2scm ("system-start-delimiter-interface"));
56 System_start_delimiter::simple_bar (Score_element*me,Real h)
58 Real w = me->paper_l ()->get_var ("stafflinethickness") *
59 gh_scm2double (me->get_elt_property ("thickness"));
60 return Lookup::filledbox (Box (Interval(0,w), Interval(-h/2, h/2)));
63 MAKE_SCHEME_CALLBACK(System_start_delimiter,after_line_breaking,1);
66 System_start_delimiter::after_line_breaking (SCM smob)
68 try_collapse (unsmob_element (smob));
69 return SCM_UNSPECIFIED;
73 System_start_delimiter::try_collapse (Score_element*me)
75 SCM gl = me->get_elt_property ("glyph");
77 if (scm_ilength (me->get_elt_property ("elements")) <= 1 && gl == ly_symbol2scm ("bar-line"))
85 MAKE_SCHEME_CALLBACK(System_start_delimiter,brew_molecule,1);
88 System_start_delimiter::brew_molecule (SCM smob)
90 Score_element * me = unsmob_element (smob);
91 Interval ext = ly_scm2interval (Axis_group_interface::group_extent_callback (me->self_scm(), gh_int2scm (Y_AXIS)));
92 Real l = ext.length ();
95 SCM s = me->get_elt_property ("collapse-height");
96 if (gh_number_p (s) && l < gh_scm2double (s))
102 s = me->get_elt_property ("glyph");
106 if (s == ly_symbol2scm ("bracket"))
107 m = staff_bracket (me,l);
108 else if (s == ly_symbol2scm ("brace"))
109 m = staff_brace (me,l);
110 else if (s == ly_symbol2scm ("bar-line"))
111 m = simple_bar (me,l);
114 m.translate_axis (ext.center (), Y_AXIS);
115 return m.create_scheme ();
122 System_start_delimiter::staff_brace (Score_element*me,Real y)
124 int staff_size = 20; // URG.
128 int minht = 2 * staff_size;
129 int maxht = 7 * minht;
130 int idx = int (((maxht - step) <? y - minht) / step);
133 Font_metric *fm = Font_interface::get_default_font (me);
135 SCM at =gh_list (ly_symbol2scm ("char"), gh_int2scm (idx), SCM_UNDEFINED);
136 at = fontify_atom (fm, at);
138 Box b (Interval (0,0), Interval (-y/2, y/2));
140 return Molecule(b, at);