2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1997--2010 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 "engraver.hh"
25 class Default_bar_line_engraver
: public Engraver
28 /* Need to know whether we're advancing in grace notes, or not. */
31 void start_translation_timestep ();
32 void stop_translation_timestep ();
35 TRANSLATOR_DECLARATIONS (Default_bar_line_engraver
);
38 #include "translator.icc"
40 ADD_TRANSLATOR (Default_bar_line_engraver
,
42 "This engraver determines what kind of automatic bar lines"
43 " should be produced, and sets @code{whichBar} accordingly."
44 " It should be at the same level as @ref{Timing_translator}.",
61 Default_bar_line_engraver::Default_bar_line_engraver ()
63 last_moment_
.main_part_
= Rational (-1);
67 Default_bar_line_engraver::start_translation_timestep ()
69 SCM automatic_bars
= get_property ("automaticBars");
70 Moment now
= now_mom ();
71 SCM which
= get_property ("whichBar");
73 /* Set the first bar of the score? */
74 if (!scm_is_string (which
))
77 Moment mp
= measure_position (context ());
78 bool start_of_measure
= (last_moment_
.main_part_
!= now
.main_part_
81 if (!scm_is_string (which
) && to_boolean (automatic_bars
))
83 SCM always
= get_property ("barAlways");
85 if ((start_of_measure
&& last_moment_
.main_part_
>= Moment (0))
86 || to_boolean (always
))
88 /* should this work, or be junked? See input/bugs/no-bars.ly */
89 which
= get_property ("defaultBarType");
93 context ()->set_property ("whichBar", which
);
97 Default_bar_line_engraver::stop_translation_timestep ()
99 context ()->set_property ("whichBar", SCM_EOL
);
100 last_moment_
= now_mom ();