2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
20 #include "bar-line.hh"
22 #include "span-bar.hh"
23 #include "engraver.hh"
27 Make bars that span multiple "staves". Catch bars, and span a
28 Span_bar over them if we find more than 2 bars. Vertical alignment
29 of staves changes the appearance of spanbars. It is up to the
30 aligner (Vertical_align_engraver, in this case, to add extra
31 dependencies to the spanbars.
33 class Span_bar_engraver
: public Engraver
39 TRANSLATOR_DECLARATIONS (Span_bar_engraver
);
41 DECLARE_ACKNOWLEDGER (bar_line
);
42 void stop_translation_timestep ();
45 Span_bar_engraver::Span_bar_engraver ()
51 Span_bar_engraver::acknowledge_bar_line (Grob_info i
)
53 int depth
= i
.origin_contexts (this).size ();
54 if (depth
&& !Span_bar::has_interface (i
.grob ()))
56 Item
*it
= dynamic_cast<Item
*> (i
.grob ());
59 if (bars_
.size () >= 2 && !spanbar_
)
61 spanbar_
= make_item ("SpanBar", SCM_EOL
);
63 spanbar_
->set_parent (bars_
[0], X_AXIS
);
69 Span_bar_engraver::stop_translation_timestep ()
73 for (vsize i
= 0; i
< bars_
.size (); i
++)
74 Span_bar::add_bar (spanbar_
, bars_
[i
]);
76 SCM vissym
= ly_symbol2scm ("break-visibility");
77 SCM vis
= bars_
[0]->internal_get_property (vissym
);
78 if (ly_is_equal (spanbar_
->internal_get_property (vissym
), vis
))
79 spanbar_
->set_property (vissym
, vis
);
86 #include "translator.icc"
88 ADD_ACKNOWLEDGER (Span_bar_engraver
, bar_line
);
89 ADD_TRANSLATOR (Span_bar_engraver
,
91 "Make cross-staff bar lines: It catches all normal bar lines"
92 " and draws a single span bar across them.",