source file of the GNU LilyPond music typesetter
- (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#include "translator-group.hh"
#include "command-request.hh"
#include "multi-measure-rest.hh"
#include "timing-translator.hh"
#include "engraver.hh"
+#include "grob.hh"
/**
Do time bookkeeping
*/
class Timing_engraver : public Timing_translator, public Engraver
-{
+{
protected:
+ /*
+ Needed to know whether we're advancing in grace notes, or not.
+ */
+ Moment last_moment_;
+
virtual void start_translation_timestep ();
virtual void stop_translation_timestep ();
- virtual void process_music ();
+
public:
- VIRTUAL_COPY_CONS(Translator);
+ TRANSLATOR_DECLARATIONS(Timing_engraver);
};
-ADD_THIS_TRANSLATOR(Timing_engraver);
+
+Timing_engraver::Timing_engraver ()
+{
+ last_moment_.main_part_ = Rational (-1);
+}
+
+
void
-Timing_engraver::start_translation_timestep( )
+Timing_engraver::start_translation_timestep ()
{
Timing_translator::start_translation_timestep ();
SCM nonauto = get_property ("barNonAuto");
-
+ Moment now = now_mom ();
SCM which = get_property ("whichBar");
+
+ /*
+ Set the first bar of the score?
+ */
if (!gh_string_p (which))
- which = now_mom ()
+ which
+ = (now.main_part_ || now.main_part_ == last_moment_.main_part_)
? SCM_EOL : ly_str02scm ("|");
+
+ Moment mp = measure_position ();
+ bool start_of_measure = (last_moment_.main_part_ != now.main_part_&& !mp.main_part_ );
+
+ if (start_of_measure)
+ {
+ Moment mlen = Moment(measure_length ());
+ unsmob_grob (get_property ("currentCommandColumn"))->set_grob_property ("measure-length", mlen.smobbed_copy());
+ }
if (!gh_string_p (which) && !to_boolean (nonauto))
{
SCM always = get_property ("barAlways");
- if (!measure_position ()
- || (to_boolean (always)))
+
+ if ( start_of_measure || (to_boolean (always)))
{
/* should this work, or be junked? See input/bugs/no-bars.ly */
- which=get_property ("defaultBarType" );
+ which = get_property ("defaultBarType");
}
}
Timing_engraver::stop_translation_timestep ()
{
Timing_translator::stop_translation_timestep ();
- daddy_trans_l_->set_property ("whichBar", SCM_EOL);
+ daddy_trans_l_->set_property ("whichBar", SCM_EOL);
+ last_moment_ = now_mom ();
+
}
-/*
- ugh. Translator doesn't do process_music ().
- */
-void
-Timing_engraver::process_music ()
-{
- Timing_translator::process_music ();
-}
+ENTER_DESCRIPTION(Timing_engraver,
+/* descr */ " Responsible for synchronizing timing information from staves.
+Normally in @code{Score}. In order to create polyrhythmic music,
+this engraver should be removed from @code{Score} and placed in
+@code{Staff}.",
+/* creats*/ "",
+/* acks */ "",
+/* reads */ "timeSignatureFraction barCheckNoSynchronize barNonAuto whichBar barAlways defaultBarType skipBars timing oneBeat measureLength measurePosition currentBarNumber",
+/* write */ "");