source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "bar.hh"
+#include "bar-line.hh"
#include "score-engraver.hh"
-#include "musical-request.hh"
-#include "multi-measure-rest.hh"
-#include "command-request.hh"
-
+#include "event.hh"
#include "engraver-group-engraver.hh"
#include "warn.hh"
#include "item.hh"
#include "engraver.hh"
-/**
+/*
generate bars. Either user ("|:"), or default (new measure)
+
*/
class Bar_engraver : public Engraver
{
public:
- Bar_engraver();
- VIRTUAL_COPY_CONS(Translator);
- void request_bar (String type_str);
+ TRANSLATOR_DECLARATIONS( Bar_engraver );
+ void request_bar (String type_string);
protected:
- virtual void do_creation_processing ();
- virtual void do_removal_processing ();
- virtual void do_process_music();
- virtual void do_pre_move_processing();
+ virtual void finalize ();
+ virtual void stop_translation_timestep ();
+ virtual void process_acknowledged_grobs ();
private:
void typeset_bar ();
void create_bar ();
- Item * bar_p_;
+ Item * bar_;
};
-Bar_engraver::Bar_engraver()
+Bar_engraver::Bar_engraver ()
{
- bar_p_ =0;
- do_post_move_processing();
+ bar_ =0;
}
void
Bar_engraver::create_bar ()
{
- if (!bar_p_)
+ if (!bar_)
{
- bar_p_ = new Item (get_property ("BarLine"));
-
+ bar_ = new Item (get_property ("BarLine"));
SCM gl = get_property ("whichBar");
- if (scm_equal_p (gl, bar_p_->get_elt_property ("glyph")) != SCM_BOOL_T)
- bar_p_->set_elt_property ("glyph", gl);
+ if (scm_equal_p (gl, bar_->get_grob_property ("glyph")) != SCM_BOOL_T)
+ bar_->set_grob_property ("glyph", gl);
- announce_element (bar_p_, 0);
+ announce_grob(bar_, SCM_EOL);
}
}
-void
-Bar_engraver::do_creation_processing ()
-{
-}
-
void
-Bar_engraver::do_removal_processing ()
+Bar_engraver::finalize ()
{
typeset_bar ();
}
/*
- Bar_engraver should come *after* any engravers that expect bars to
- modify whichBar in do_process_music () be typeset
+ Bar_engraver should come *after* any engravers that
+ modify whichBar
+
+ This is a little hairy : whichBar may be set by
+ Repeat_acknowledge_engraver::process_music, which is at score
+ context. This means that grobs could should be created after
+ process_music. We do stuff process_acknowledged_grobs(), just to be
+ on the safe side.
+
*/
+
void
-Bar_engraver::do_process_music()
+Bar_engraver::process_acknowledged_grobs ()
{
- SCM b =get_property ("whichBar");
- if (gh_string_p (b))
+ if (!bar_ && gh_string_p (get_property ("whichBar")))
{
create_bar ();
}
void
Bar_engraver::typeset_bar ()
{
- if (bar_p_)
+ if (bar_)
{
- typeset_element (bar_p_);
- bar_p_ =0;
+ typeset_grob (bar_);
+ bar_ =0;
}
}
/*
- lines may only be broken if there is a barline in all staffs
+ lines may only be broken if there is a barline in all staves
*/
void
-Bar_engraver::do_pre_move_processing()
+Bar_engraver::stop_translation_timestep ()
{
- if (!bar_p_)
+ if (!bar_)
{
- Score_engraver * e = 0;
- Translator * t = daddy_grav_l ();
- for (; !e && t; t = t->daddy_trans_l_)
- {
- e = dynamic_cast<Score_engraver*> (t);
- }
-
- if (!e)
- programming_error ("No score engraver!");
- else
- e->forbid_breaks (); // guh. Use properties!
+ top_engraver ()->forbid_breaks (); // guh. Use properties!
}
else
typeset_bar ();
}
-ADD_THIS_TRANSLATOR(Bar_engraver);
+
+ENTER_DESCRIPTION(Bar_engraver,
+/* descr */ "Create barlines. This engraver is controlled through the "
+"@code{whichBar} property. If it has no bar line to create, it will forbid a linebreak at this point",
+/* creats*/ "BarLine",
+/* accepts */ "",
+/* acks */ "",
+/* reads */ "whichBar",
+/* write */ "");