2 notehead.cc -- implement Note_head
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
12 #include "note-head.hh"
14 #include "font-interface.hh"
15 #include "molecule.hh"
16 #include "musical-request.hh"
18 #include "staff-symbol-referencer.hh"
21 build a ledger line for small pieces.
24 Note_head::ledger_line (Interval xwid, Grob *me)
26 Drul_array<Molecule> endings;
27 endings[LEFT] = Font_interface::get_default_font (me)->find_by_name ("noteheads-ledgerending");
28 Molecule *e = &endings[LEFT];
31 Real thick = e->extent (Y_AXIS).length ();
32 Real len = e->extent (X_AXIS).length () - thick;
37 endings[d].translate_axis (xwid[d] - endings[d].extent (X_AXIS)[d], X_AXIS);
38 total.add_molecule (endings[d]);
39 } while ((flip (&d)) != LEFT);
41 Real xpos = xwid [LEFT] + len;
43 while (xpos + len + thick /2 <= xwid[RIGHT])
45 e->translate_axis (len, X_AXIS);
46 total.add_molecule (*e);
55 Note_head::ledger_lines (Grob*me, int count, Direction dir, Interval idw)
57 Real inter_f = Staff_symbol_referencer::staff_space (me)/2;
58 Molecule ledger (ledger_line (idw, me));
60 ledger.set_empty (true);
61 Real offs = (Staff_symbol_referencer::on_staffline (me))
66 for (int i=0; i < count; i++)
69 s.translate_axis (-dir * inter_f * i*2 + offs,
71 legs.add_molecule (s);
77 MAKE_SCHEME_CALLBACK (Note_head,brew_molecule,1);
80 Note_head::brew_molecule (SCM smob)
82 Grob *me = unsmob_grob (smob);
84 int sz = Staff_symbol_referencer::line_count (me)-1;
85 int p = (int) rint (Staff_symbol_referencer::position_f (me));
86 int streepjes_i = abs (p) < sz
90 SCM style = me->get_grob_property ("style");
91 if (!gh_symbol_p (style))
97 ugh: use gh_call () / scm_apply ().
99 UGH: use grob-property.
101 SCM log = me->get_grob_property ("duration-log");
102 SCM exp = scm_list_n (ly_symbol2scm ("find-notehead-symbol"), log,
103 ly_quote_scm (style),
105 String name = "noteheads-" + ly_scm2string (scm_primitive_eval (exp));
106 Molecule out = Font_interface::get_default_font (me)->find_by_name (name);
111 Direction dir = (Direction)sign (p);
112 Interval hd = out.extent (X_AXIS);
113 Real hw = hd.length ()/4;
114 out.add_molecule (ledger_lines (me, streepjes_i, dir,
115 Interval (hd[LEFT] - hw,
119 return out.smobbed_copy ();
123 Note_head::has_interface (Grob*m)
125 return m&& m->has_interface (ly_symbol2scm ("note-head-interface"));
129 MAKE_SCHEME_CALLBACK (Note_head,brew_ez_molecule,1);
132 Note_head::brew_ez_molecule (SCM smob)
134 Grob *me = unsmob_grob (smob);
135 int l = gh_scm2int (me->get_grob_property ("duration-log"));
138 SCM at = scm_list_n (ly_symbol2scm ("ez-ball"),
139 me->get_grob_property ("note-character"),
143 Box bx (Interval (0, 1.0), Interval (-0.5, 0.5));
145 int p = (int) rint (Staff_symbol_referencer::position_f (me));
147 int sz = Staff_symbol_referencer::line_count (me)-1;
148 int streepjes_i = abs (p) < sz
154 Direction dir = (Direction)sign (p);
155 Interval hd = m.extent (X_AXIS);
156 Real hw = hd.length ()/4;
157 m.add_molecule (ledger_lines (me, streepjes_i, dir,
158 Interval (hd[LEFT] - hw,
162 return m.smobbed_copy ();
167 Note_head::stem_attachment_coordinate (Grob *me, Axis a)
169 SCM v = me->get_grob_property ("stem-attachment-function");
171 if (!gh_procedure_p (v))
174 SCM st = me->get_grob_property ("style");
175 SCM result = gh_apply (v, scm_list_n (st, SCM_UNDEFINED));
177 if (!gh_pair_p (result))
180 result = (a == X_AXIS) ? ly_car (result) : ly_cdr (result);
182 return gh_number_p (result) ? gh_scm2double (result) : 0.0;