2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1997--2015 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"
41 Default_bar_line_engraver::boot ()
46 ADD_TRANSLATOR (Default_bar_line_engraver,
48 "This engraver determines what kind of automatic bar lines"
49 " should be produced, and sets @code{whichBar} accordingly."
50 " It should be at the same level as @ref{Timing_translator}.",
68 Default_bar_line_engraver::Default_bar_line_engraver (Context *c)
71 last_moment_.main_part_ = Rational (-1);
75 Default_bar_line_engraver::start_translation_timestep ()
77 SCM automatic_bars = get_property ("automaticBars");
78 Moment now = now_mom ();
79 SCM which = get_property ("whichBar");
81 /* Set the first bar of the score? */
82 if (!scm_is_string (which))
85 Moment mp = measure_position (context ());
86 bool start_of_measure = (last_moment_.main_part_ != now.main_part_
88 && to_boolean (get_property ("timing")));
90 if (!scm_is_string (which) && to_boolean (automatic_bars))
92 SCM always = get_property ("barAlways");
94 if ((start_of_measure && last_moment_.main_part_ >= Moment (0))
95 || to_boolean (always))
97 /* should this work, or be junked? See input/bugs/no-bars.ly */
98 which = get_property ("defaultBarType");
102 context ()->set_property ("whichBar", which);
106 Default_bar_line_engraver::stop_translation_timestep ()
108 context ()->set_property ("whichBar", SCM_EOL);
109 last_moment_ = now_mom ();