2 bar-engraver.cc -- implement Bar_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
7 Jan Nieuwenhuizen <janneke@gnu.org>
11 #include "score-engraver.hh"
12 #include "musical-request.hh"
13 #include "engraver-group-engraver.hh"
16 #include "engraver.hh"
19 generate bars. Either user ("|:"), or default (new measure)
22 class Bar_engraver : public Engraver
26 VIRTUAL_COPY_CONS(Translator);
27 void request_bar (String type_str);
30 virtual void do_removal_processing ();
31 void deprecated_process_music();
32 virtual void stop_translation_timestep();
33 virtual void create_grobs ();
42 Bar_engraver::Bar_engraver()
48 Bar_engraver::create_bar ()
52 bar_p_ = new Item (get_property ("BarLine"));
54 SCM gl = get_property ("whichBar");
55 if (scm_equal_p (gl, bar_p_->get_grob_property ("glyph")) != SCM_BOOL_T)
56 bar_p_->set_grob_property ("glyph", gl);
58 announce_grob (bar_p_, 0);
63 Bar_engraver::do_removal_processing ()
69 Bar_engraver should come *after* any engravers that expect bars to
70 modify whichBar in deprecated_process_music () be typeset
73 Bar_engraver::deprecated_process_music()
75 if (!bar_p_ && gh_string_p (get_property ("whichBar")))
82 Bar_engraver::create_grobs ()
84 deprecated_process_music ();
88 Bar_engraver::typeset_bar ()
92 typeset_grob (bar_p_);
98 lines may only be broken if there is a barline in all staffs
101 Bar_engraver::stop_translation_timestep()
105 Score_engraver * e = 0;
106 Translator * t = daddy_grav_l ();
107 for (; !e && t; t = t->daddy_trans_l_)
109 e = dynamic_cast<Score_engraver*> (t);
113 programming_error ("No score engraver!");
115 e->forbid_breaks (); // guh. Use properties!
121 ADD_THIS_TRANSLATOR(Bar_engraver);