/*
- timing-grav.cc -- implement Timing_engraver
+ timing-engraver.cc -- implement Timing_engraver
source file of the GNU LilyPond music typesetter
- (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "translator-group.hh"
-#include "command-request.hh"
-#include "grob-info.hh"
+
+#include "context.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 initialize ();
+ virtual void process_music();
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::initialize ()
+{
+ Timing_translator::initialize ();
+
+ SCM which = get_property ("whichBar");
+ Moment now = now_mom ();
+
+ /* Set the first bar of the score? */
+ if (!scm_is_string (which))
+ which = (now.main_part_ || now.main_part_ == last_moment_.main_part_)
+ ? SCM_EOL : scm_makfrom0str ("|");
+
+ context ()->set_property ("whichBar", which);
+}
+
+void
+Timing_engraver::process_music()
+{
+ Timing_translator::process_music ();
+
+ bool start_of_measure = (last_moment_.main_part_ != now_mom().main_part_
+ && !measure_position ().main_part_);
+
+ /*
+ We can't do this in start_translation_timestep(), since time sig
+ changes won't have happened by then.
+ */
+ if (start_of_measure)
+ {
+ Moment mlen = Moment (measure_length ());
+ unsmob_grob (get_property ("currentCommandColumn"))
+ ->set_property ("measure-length", mlen.smobbed_copy ());
+ }
+}
+
void
Timing_engraver::start_translation_timestep ()
{
Timing_translator::start_translation_timestep ();
- SCM nonauto = get_property ("barNonAuto");
-
+ SCM automatic_bars = get_property ("automaticBars");
+ Moment now = now_mom ();
SCM which = get_property ("whichBar");
- if (!gh_string_p (which))
- which = now_mom ()
- ? SCM_EOL : ly_str02scm ("|");
-
- if (!gh_string_p (which) && !to_boolean (nonauto))
+
+ /* Set the first bar of the score? */
+ if (!scm_is_string (which))
+ which = SCM_EOL;
+
+ Moment mp = measure_position ();
+ bool start_of_measure = (last_moment_.main_part_ != now.main_part_
+ && !mp.main_part_);
+
+ if (!scm_is_string (which) && to_boolean (automatic_bars))
{
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");
}
}
- daddy_trans_l_->set_property ("whichBar", which);
+ context ()->set_property ("whichBar", which);
}
void
Timing_engraver::stop_translation_timestep ()
{
Timing_translator::stop_translation_timestep ();
- daddy_trans_l_->set_property ("whichBar", SCM_EOL);
+ context ()->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 ();
-}
+ADD_TRANSLATOR (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}. "
+"\n\nThis engraver adds the alias @code{Timing} to its containing context."
+
+ ,
+/* creats*/ "",
+/* accepts */ "",
+/* acks */ "",
+/* reads */ "automaticBars whichBar barAlways defaultBarType skipBars timing measureLength measurePosition currentBarNumber",
+/* write */ "");