2 lyric-extender.cc -- implement Lyric_extender
3 source file of the GNU LilyPond music typesetter
5 (c) 1998--2004 Jan Nieuwenhuizen <janneke@gnu.org>
15 #include "paper-column.hh"
16 #include "output-def.hh"
17 #include "lyric-extender.hh"
18 #include "note-head.hh"
19 #include "group-interface.hh"
23 MAKE_SCHEME_CALLBACK (Lyric_extender, print, 1)
25 Lyric_extender::print (SCM smob)
27 Spanner *me = unsmob_spanner (smob);
28 Item *left_edge = me->get_bound (LEFT);
29 Item *right_text = unsmob_item (me->get_property ("next"));
31 Grob *common = left_edge;
34 common = common->common_refpoint (right_text, X_AXIS);
36 common = common->common_refpoint (me->get_bound (RIGHT), X_AXIS);
37 Real sl = me->get_paper ()->get_dimension (ly_symbol2scm ("linethickness"));
38 Link_array<Grob> heads (Pointer_group_interface__extract_grobs (me, (Grob*)0,
44 common = common_refpoint_of_array (heads, common, X_AXIS);
46 Real left_point = 0.0;
47 if (left_edge->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
48 left_point = left_edge->extent (common, X_AXIS)[RIGHT];
49 else if (heads.size ())
50 left_point = heads[0]->extent (common, X_AXIS)[LEFT];
52 left_point = left_edge->extent (common, X_AXIS)[RIGHT];
54 if (isinf (left_point))
57 /* It seems that short extenders are even lengthened to go past the
58 note head, but haven't found a pattern in it yet. --hwn 1/1/04 */
59 SCM minlen = me->get_property ("minimum-length");
61 = left_point + (robust_scm2double (minlen, 0));
64 right_point = right_point >? heads.top ()->extent (common, X_AXIS)[RIGHT];
66 Real h = sl * robust_scm2double (me->get_property ("thickness"), 0);
70 right_point = right_point <? (robust_relative_extent (right_text, common, X_AXIS)[LEFT] - pad);
72 /* run to end of line. */
73 right_point = right_point >? (robust_relative_extent (me->get_bound (RIGHT), common, X_AXIS)[LEFT] - pad);
77 Real w = right_point - left_point;
82 Stencil mol (Lookup::round_filled_box (Box (Interval (0, w),
85 mol.translate_axis (left_point - me->relative_coordinate (common, X_AXIS),
87 return mol.smobbed_copy ();
91 ADD_INTERFACE (Lyric_extender,"lyric-extender-interface",
92 "The extender is a simple line at the baseline of the lyric "
93 "that helps show the length of a melissima (tied/slurred note).",
94 "next thickness heads");