2 bar-engraver.cc -- implement Bar_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
7 Jan Nieuwenhuizen <janneke@gnu.org>
10 #include "bar-line.hh"
12 #include "score-engraver.hh"
16 #include "translator.icc"
19 generate bars. Either user ("|:"), or default (new measure)
21 class Bar_engraver : public Engraver
24 TRANSLATOR_DECLARATIONS (Bar_engraver);
25 void request_bar (string type_string);
28 void stop_translation_timestep ();
29 void process_acknowledged ();
37 Bar_engraver::Bar_engraver ()
43 Bar_engraver::create_bar ()
47 bar_ = make_item ("BarLine", SCM_EOL);
48 SCM gl = get_property ("whichBar");
49 if (scm_equal_p (gl, bar_->get_property ("glyph")) != SCM_BOOL_T)
50 bar_->set_property ("glyph", gl);
55 Bar_engraver should come *after* any engravers that
58 This is a little hairy : whichBar may be set by
59 Repeat_acknowledge_engraver::process_music, which is at score
60 context. This means that grobs could should be created after
61 process_music. We do stuff process_acknowledged (), just to be
66 Bar_engraver::process_acknowledged ()
68 if (!bar_ && scm_is_string (get_property ("whichBar")))
73 lines may only be broken if there is a barline in all staves
76 Bar_engraver::stop_translation_timestep ()
79 context ()->get_score_context ()->set_property ("forbidBreak", SCM_BOOL_T);
84 ADD_TRANSLATOR (Bar_engraver,
85 /* doc */ "Create barlines. This engraver is controlled through the "
86 "@code{whichBar} property. If it has no bar line to create, it will forbid a linebreak at this point",
87 /* create */ "BarLine",
88 /* read */ "whichBar",
89 /* write */ "forbidBreak");