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 *le = me->get_bound (LEFT);
29 Item *right_text = unsmob_item (me->get_property ("next"));
31 Grob *common = le->common_refpoint (right_text, X_AXIS);
32 common = common->common_refpoint (me->get_bound (RIGHT), X_AXIS);
33 Real sl = me->get_paper ()->get_dimension (ly_symbol2scm ("linethickness"));
35 Link_array<Grob> heads (Pointer_group_interface__extract_grobs (me, (Grob*)0,
41 common = common_refpoint_of_array (heads, common, X_AXIS);
43 Real left_point = 0.0;
44 if (le->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
45 left_point = le->extent (common, X_AXIS)[RIGHT];
46 else if (heads.size ())
47 left_point = heads[0]->extent (common, X_AXIS)[LEFT];
49 left_point = le->extent (common, X_AXIS)[RIGHT];
51 if (isinf (left_point))
54 /* It seems that short extenders are even lengthened to go past the
55 note head, but haven't found a pattern in it yet. --hwn 1/1/04 */
56 SCM minlen = me->get_property ("minimum-length");
58 = left_point + (robust_scm2double (minlen, 0));
61 right_point = right_point >? heads.top ()->extent (common, X_AXIS)[RIGHT];
63 Real h = sl * robust_scm2double (me->get_property ("thickness"), 0);
67 right_point = right_point <? (robust_relative_extent (right_text, common, X_AXIS)[LEFT] - pad);
69 /* run to end of line. */
70 right_point = right_point >? (me->get_bound (RIGHT)->extent (common, X_AXIS)[LEFT] - pad);
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 ();
88 ADD_INTERFACE (Lyric_extender,"lyric-extender-interface",
89 "The extender is a simple line at the baseline of the lyric "
90 "that helps show the length of a melissima (tied/slurred note).",
91 "next thickness heads");