source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "bar.hh"
+#include "bar-line.hh"
#include "score-engraver.hh"
-#include "bar-engraver.hh"
-#include "musical-request.hh"
-#include "multi-measure-rest.hh"
-#include "command-request.hh"
-
-#include "engraver-group-engraver.hh"
#include "warn.hh"
#include "item.hh"
-Bar_engraver::Bar_engraver()
+#include "translator.icc"
+
+/*
+ generate bars. Either user ("|:"), or default (new measure)
+*/
+class Bar_engraver : public Engraver
{
- bar_p_ =0;
- do_post_move_processing();
+public:
+ TRANSLATOR_DECLARATIONS (Bar_engraver);
+ void request_bar (String type_string);
+
+protected:
+ virtual void finalize ();
+ void stop_translation_timestep ();
+ void process_acknowledged ();
+
+private:
+ void typeset_bar ();
+ void create_bar ();
+
+ Item *bar_;
+};
+
+Bar_engraver::Bar_engraver ()
+{
+ bar_ = 0;
}
void
Bar_engraver::create_bar ()
{
- if (!bar_p_)
+ if (!bar_)
{
- bar_p_ = new Item (get_property ("basicBarProperties"));
- announce_element (bar_p_, 0);
+ bar_ = make_item ("BarLine", SCM_EOL);
+ SCM gl = get_property ("whichBar");
+ if (scm_equal_p (gl, bar_->get_property ("glyph")) != SCM_BOOL_T)
+ bar_->set_property ("glyph", gl);
}
}
-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 (), just to be
+ on the safe side.
*/
+
void
-Bar_engraver::do_process_music()
+Bar_engraver::process_acknowledged ()
{
- SCM b =get_property ("whichBar");
- if (gh_string_p (b))
- {
- create_bar ();
- }
+ if (!bar_ && scm_is_string (get_property ("whichBar")))
+ create_bar ();
}
void
Bar_engraver::typeset_bar ()
{
- if (bar_p_)
- {
- 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);
- typeset_element (bar_p_);
- bar_p_ =0;
- }
+ 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()
+void
+Bar_engraver::stop_translation_timestep ()
{
- if (!bar_p_)
- {
- 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!
- }
+ if (!bar_)
+ /* guh. Use properties! */
+ get_score_engraver ()->forbid_breaks ();
else
typeset_bar ();
}
-ADD_THIS_TRANSLATOR(Bar_engraver);
-
-
-
+ADD_TRANSLATOR (Bar_engraver,
+ /* doc */ "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",
+ /* create */ "BarLine",
+ /* accept */ "",
+ /* read */ "whichBar",
+ /* write */ "");