2 hyphen-spanner.cc -- implement Hyphen_spanner
4 source file of the GNU LilyPond music typesetter
6 (c) 1999 Glen Prideaux <glenprideaux@iname.com>
8 (adapted from lyric-extender)
15 #include "molecule.hh"
16 #include "paper-def.hh"
17 #include "hyphen-spanner.hh"
18 #include "paper-column.hh"
22 MAKE_SCHEME_CALLBACK(Hyphen_spanner,brew_molecule,1)
25 Hyphen_spanner::brew_molecule (SCM smob)
27 Spanner * sp = dynamic_cast<Spanner*> (unsmob_element (smob));
29 Score_element * common = sp;
33 common = common->common_refpoint( sp->get_bound (d), X_AXIS);
35 while (flip (&d) != LEFT);
40 bounds[d] = sp->get_bound (d)->extent (common, X_AXIS)[-d];
42 while (flip (&d) != LEFT);
44 Real ss = sp->paper_l ()->get_var ("staffspace");
45 Real lt = sp->paper_l ()->get_var ("stafflinethickness");
46 Real th = gh_scm2double (sp->get_elt_property ("thickness")) * lt ;
47 Real h = gh_scm2double (sp->get_elt_property ("height")) * ss;
48 Real l = gh_scm2double (sp->get_elt_property ("minimum-length")) * ss;
49 // The hyphen can exist in the word space of the left lyric ...
50 SCM space = sp->get_bound (LEFT)->get_elt_property ("word-space");
51 if (gh_number_p (space))
53 bounds[LEFT] -= gh_scm2double (space)*ss;
55 Real w = bounds.length ();
56 /* for length, use a geometric mean of the available space and some minimum
62 /* OK, we have a problem. Usually this means that we're on the
63 first column, and we have a long lyric which extends to near
64 the offset for stuff */
65 /* This test for being on the first column has been shamelessly
66 ripped from spanner.cc */
67 Paper_column *sc = dynamic_cast<Paper_column*> (sp->get_bound(LEFT)->column_l());
69 sc->break_status_dir () == RIGHT)
71 /* We are on the first column, so it's probably harmless to
72 get the minimum length back by extending leftwards into
73 the space under the clef/key sig/time sig */
74 bounds[LEFT] = bounds[RIGHT] - l;
78 /* We can't get the length desired. Maybe we should warn. */
82 Box b (Interval (-l/2,l/2), Interval (h,h+th));
83 Molecule mol (Lookup::filledbox (b));
84 mol.translate_axis (bounds.center ()
85 -sp->relative_coordinate (common, X_AXIS),
87 return mol.create_scheme ();
91 Hyphen_spanner::set_textitem (Direction d, Score_element* b)
93 elt_l_->set_bound (d, b);
94 elt_l_->add_dependency (b);
97 Hyphen_spanner::Hyphen_spanner (Spanner*s)