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"
22 Lyric_extender::is_visible (Grob *gr)
24 Spanner*me = dynamic_cast<Spanner*> (gr);
26 SCM heads = me->get_property ("heads");
27 int l = scm_ilength (heads);
34 MAKE_SCHEME_CALLBACK (Lyric_extender,print,1)
36 Lyric_extender::print (SCM smob)
38 Spanner *me = unsmob_spanner (smob);
39 Item *l = me->get_bound (LEFT);
40 Item *r = me->get_bound (RIGHT);
41 Grob *common = l->common_refpoint (r, X_AXIS);
44 Real sl = me->get_paper ()->get_dimension (ly_symbol2scm ("linethickness"));
46 Link_array<Grob> heads (Pointer_group_interface__extract_grobs (me, (Grob*)0,
49 if (!heads.size () && r->break_status_dir () == CENTER)
52 common = common_refpoint_of_array (heads, common, X_AXIS);
54 Real left_point = 0.0;
55 if (l->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
56 left_point = l->extent (common, X_AXIS)[RIGHT];
58 left_point = heads[0]->extent (common, X_AXIS)[LEFT];
60 if (isinf (left_point))
64 It seems that short extenders are even lengthened to go past the
65 note head, but haven't found a pattern in it yet. --hwn 1/1/04
68 SCM minlen = me->get_property ("minimum-length");
70 = left_point + (robust_scm2double (minlen,0));
72 Spanner *orig = dynamic_cast<Spanner*> (me->original_);
74 && (me->get_break_index () == orig->broken_intos_.size () - 2)
75 && !Lyric_extender::is_visible (orig->broken_intos_.top ());
79 right_point = right_point >? heads.top ()->extent (common, X_AXIS)[RIGHT];
81 Real h = sl * robust_scm2double (me->get_property ("thickness"), 0);
84 if (r->internal_has_interface (ly_symbol2scm ("lyric-syllable-interface")))
85 right_point = right_point <? (r->extent (common, X_AXIS)[LEFT] - pad);
86 else if (Note_head::has_interface (r))
93 right_point = right_point >? (r->extent (common, X_AXIS)[LEFT] - pad);
96 if (isinf (right_point))
98 programming_error ("Right point of extender not defined?");
99 right_point = r->relative_coordinate (common, X_AXIS);
104 Real w = right_point - left_point;
109 Stencil mol (Lookup::round_filled_box (Box (Interval (0,w), Interval (0,h)),
111 mol.translate_axis (left_point - me->relative_coordinate (common, X_AXIS), X_AXIS);
112 return mol.smobbed_copy ();
116 ADD_INTERFACE (Lyric_extender,"lyric-extender-interface",
117 "The extender is a simple line at the baseline of the lyric "
118 " that helps show the length of a melissima (tied/slurred note).",