2 hyphen-spanner.cc -- implement Hyphen_spanner
4 source file of the GNU LilyPond music typesetter
6 (c) 2003--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #include "lyric-hyphen.hh"
14 #include "output-def.hh"
15 #include "paper-column.hh"
18 MAKE_SCHEME_CALLBACK (Hyphen_spanner, print, 1)
20 Hyphen_spanner::print (SCM smob)
22 Spanner *me = unsmob_spanner (smob);
23 Drul_array<Item *> bounds (me->get_bound (LEFT),
24 me->get_bound (RIGHT));
26 if (bounds[LEFT]->break_status_dir ()
27 && Paper_column::when_mom (bounds[LEFT]) == Paper_column::when_mom (bounds[RIGHT]->get_column ()))
30 Grob *common = bounds[LEFT]->common_refpoint (bounds[RIGHT], X_AXIS);
36 Interval iv = bounds[d]->extent (common, X_AXIS);
38 span_points[d] = iv.is_empty ()
39 ? bounds[d]->relative_coordinate (common, X_AXIS)
42 while (flip (&d) != LEFT);
44 Real lt = me->get_layout ()->get_dimension (ly_symbol2scm ("linethickness"));
45 Real th = robust_scm2double (me->get_property ("thickness"), 1) * lt;
46 Real h = robust_scm2double (me->get_property ("height"), 0.5);
50 Real dp = robust_scm2double (me->get_property ("dash-period"), 1.0);
51 Real dl = robust_scm2double (me->get_property ("length"), .5);
56 Real l = span_points.length ();
57 int n = int (ceil (l / dp - 0.5));
61 Real space_left = l - dl - (n - 1)* dp;
64 If there is not enough space, the hyphen should disappear, but not
65 at the end of the line.
68 && !bounds[RIGHT]->break_status_dir ())
71 space_left = space_left >? 0.0;
73 Box b (Interval (0, dl), Interval (h, h + th));
74 Stencil dash_mol (Lookup::round_filled_box (b, 0.8 * lt));
77 for (int i = 0; i < n; i++)
80 m.translate_axis (span_points[LEFT] + i * dp + space_left / 2, X_AXIS);
81 total.add_stencil (m);
84 total.translate_axis (-me->relative_coordinate (common, X_AXIS), X_AXIS);
85 return total.smobbed_copy ();
88 MAKE_SCHEME_CALLBACK (Hyphen_spanner, set_spacing_rods, 1);
90 Hyphen_spanner::set_spacing_rods (SCM smob)
92 Grob *me = unsmob_grob (smob);
95 Spanner *sp = dynamic_cast<Spanner *> (me);
97 = robust_scm2double (me->get_property ("minimum-length"), 0);
102 r.item_drul_[d] = sp->get_bound (d);
104 r.distance_ += r.item_drul_[d]->extent (r.item_drul_[d], X_AXIS)[-d];
106 while (flip (&d) != LEFT);
108 if (r.item_drul_[LEFT]
109 && r.item_drul_[RIGHT])
112 return SCM_UNSPECIFIED;
115 ADD_INTERFACE (Hyphen_spanner, "lyric-hyphen-interface",
116 "A centred hyphen is a simple line between lyrics used to divide syllables",
117 "thickness height dash-period minimum-length length");