2 bar-engraver.cc -- implement Bar_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
7 Jan Nieuwenhuizen <janneke@gnu.org>
10 #include "bar-line.hh"
11 #include "score-engraver.hh"
16 generate bars. Either user ("|:"), or default (new measure)
18 class Bar_engraver
: public Engraver
21 TRANSLATOR_DECLARATIONS (Bar_engraver
);
22 void request_bar (String type_string
);
25 virtual void finalize ();
26 virtual void stop_translation_timestep ();
27 virtual void process_acknowledged_grobs ();
36 Bar_engraver::Bar_engraver ()
42 Bar_engraver::create_bar ()
46 bar_
= make_item ("BarLine", SCM_EOL
);
47 SCM gl
= get_property ("whichBar");
48 if (scm_equal_p (gl
, bar_
->get_property ("glyph")) != SCM_BOOL_T
)
49 bar_
->set_property ("glyph", gl
);
54 Bar_engraver::finalize ()
60 Bar_engraver should come *after* any engravers that
63 This is a little hairy : whichBar may be set by
64 Repeat_acknowledge_engraver::process_music, which is at score
65 context. This means that grobs could should be created after
66 process_music. We do stuff process_acknowledged_grobs (), just to be
71 Bar_engraver::process_acknowledged_grobs ()
73 if (!bar_
&& scm_is_string (get_property ("whichBar")))
78 Bar_engraver::typeset_bar ()
84 lines may only be broken if there is a barline in all staves
87 Bar_engraver::stop_translation_timestep ()
90 /* guh. Use properties! */
91 get_score_engraver ()->forbid_breaks ();
96 ADD_TRANSLATOR (Bar_engraver
,
97 /* descr */ "Create barlines. This engraver is controlled through the "
98 "@code{whichBar} property. If it has no bar line to create, it will forbid a linebreak at this point",
99 /* creats*/ "BarLine",
102 /* reads */ "whichBar",