2 lyric-extender.cc -- implement Lyric_extender
3 source file of the GNU LilyPond music typesetter
5 (c) 1998--2003 Jan Nieuwenhuizen <janneke@gnu.org>
14 #include "molecule.hh"
15 #include "paper-column.hh"
16 #include "paper-def.hh"
17 #include "lyric-extender.hh"
18 #include "note-head.hh"
19 #include "group-interface.hh"
23 Lyric_extender::is_visible (Grob *gr)
25 Spanner*me = dynamic_cast<Spanner*> (gr);
27 SCM heads = me->get_grob_property ("heads");
28 int l = scm_ilength (heads);
35 MAKE_SCHEME_CALLBACK (Lyric_extender,brew_molecule,1)
37 Lyric_extender::brew_molecule (SCM smob)
39 Spanner *me = unsmob_spanner (smob);
40 Item *l = me->get_bound (LEFT);
41 Item *r = me->get_bound (RIGHT);
42 Grob *common = l->common_refpoint (r, X_AXIS);
45 Real sl = me->get_paper ()->get_realvar (ly_symbol2scm ("linethickness"));
47 Link_array<Grob> heads (Pointer_group_interface__extract_grobs (me, (Grob*)0,
50 if (!heads.size () && r->break_status_dir () == CENTER)
53 common = common_refpoint_of_array (heads, common, X_AXIS);
55 Real left_point = 0.0;
56 if (l->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
57 left_point = l->extent (common, X_AXIS)[RIGHT];
59 left_point = heads[0]->extent (common, X_AXIS)[LEFT];
61 if (isinf (left_point))
65 It seems that short extenders are even lengthened to go past the
66 note head, but haven't found a pattern in it yet. --hwn 1/1/04
69 SCM minlen = me->get_grob_property ("minimum-length");
71 = left_point + (robust_scm2double (minlen,0));
73 Spanner *orig = dynamic_cast<Spanner*> (me->original_);
75 && (me->get_break_index () == orig->broken_intos_.size() - 2)
76 && !Lyric_extender::is_visible (orig->broken_intos_.top ());
80 right_point = right_point >? heads.top ()->extent (common, X_AXIS)[RIGHT];
82 Real h = sl * robust_scm2double (me->get_grob_property ("thickness"), 0);
85 if (!r->break_status_dir ())
86 right_point = right_point <? (r->extent (common, X_AXIS)[LEFT] - pad);
92 right_point = right_point >? (r->extent (common, X_AXIS)[LEFT] - pad);
95 if (isinf (right_point))
97 programming_error ("Right point of extender not defined?");
98 right_point = r->relative_coordinate (common, X_AXIS);
103 Real w = right_point - left_point;
108 Molecule mol (Lookup::round_filled_box (Box (Interval (0,w), Interval (0,h)),
110 mol.translate_axis (left_point - me->relative_coordinate (common, X_AXIS), X_AXIS);
111 return mol.smobbed_copy ();
115 ADD_INTERFACE (Lyric_extender,"lyric-extender-interface",
116 "The extender is a simple line at the baseline of the lyric "
117 " that helps show the length of a melissima (tied/slurred note).",