2 lyric-extender.cc -- implement Lyric_extender
3 source file of the GNU LilyPond music typesetter
5 (c) 1998--2006 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "lyric-extender.hh"
14 #include "paper-column.hh"
15 #include "output-def.hh"
16 #include "note-head.hh"
17 #include "pointer-group-interface.hh"
19 MAKE_SCHEME_CALLBACK (Lyric_extender, print, 1);
21 Lyric_extender::print (SCM smob)
23 Spanner *me = unsmob_spanner (smob);
24 Item *left_edge = me->get_bound (LEFT);
25 Item *right_text = unsmob_item (me->get_object ("next"));
27 Grob *common = left_edge;
30 common = common->common_refpoint (right_text, X_AXIS);
32 common = common->common_refpoint (me->get_bound (RIGHT), X_AXIS);
33 Real sl = me->layout ()->get_dimension (ly_symbol2scm ("line-thickness"));
35 extract_grob_set (me, "heads", heads);
40 common = common_refpoint_of_array (heads, common, X_AXIS);
42 Real left_point = 0.0;
43 if (left_edge->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
44 left_point = left_edge->extent (common, X_AXIS)[RIGHT];
45 else if (heads.size ())
46 left_point = heads[0]->extent (common, X_AXIS)[LEFT];
48 left_point = left_edge->extent (common, X_AXIS)[RIGHT];
50 if (isinf (left_point))
53 /* It seems that short extenders are even lengthened to go past the
54 note head, but haven't found a pattern in it yet. --hwn 1/1/04 */
55 SCM minlen = me->get_property ("minimum-length");
57 = left_point + (robust_scm2double (minlen, 0));
60 right_point = max (right_point, heads.back ()->extent (common, X_AXIS)[RIGHT]);
62 Real h = sl * robust_scm2double (me->get_property ("thickness"), 0);
63 Drul_array<Real> paddings (robust_scm2double (me->get_property ("left-padding"), h),
64 robust_scm2double (me->get_property ("right-padding"), h));
67 right_point = min (right_point, (robust_relative_extent (right_text, common, X_AXIS)[LEFT] - paddings[RIGHT]));
69 /* run to end of line. */
70 if (me->get_bound (RIGHT)->break_status_dir ())
71 right_point = max (right_point, (robust_relative_extent (me->get_bound (RIGHT), common, X_AXIS)[LEFT] - paddings[RIGHT]));
73 left_point += paddings[LEFT];
74 Real w = right_point - left_point;
79 Stencil mol (Lookup::round_filled_box (Box (Interval (0, w),
82 mol.translate_axis (left_point - me->relative_coordinate (common, X_AXIS),
84 return mol.smobbed_copy ();
87 ADD_INTERFACE (Lyric_extender, "lyric-extender-interface",
88 "The extender is a simple line at the baseline of the lyric "
89 "that helps show the length of a melissima (tied/slurred note).",