source file of the GNU LilyPond music typesetter
- (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include "debug.hh"
#include "timing-translator.hh"
-#include "command-request.hh"
+
+#include "warn.hh"
#include "translator-group.hh"
-#include "global-translator.hh"
+#include "global-context.hh"
#include "multi-measure-rest.hh"
-
-
void
Timing_translator::stop_translation_timestep ()
{
- Translator *t = this;
- Global_translator *global_l =0;
- do
- {
- t = t->daddy_trans_l_ ;
- global_l = dynamic_cast<Global_translator*> (t);
- }
- while (!global_l);
-
- /* allbars == ! skipbars */
- SCM sb = get_property ("skipBars");
- bool allbars = !to_boolean (sb);
+ Global_context *global = get_global_context ();
- // urg: multi bar rests: should always process whole of first bar?
- SCM tim = get_property ("timing");
- bool timb = to_boolean (tim);
- if (timb && allbars)
+ if (to_boolean (get_property ("timing"))
+ && !to_boolean (get_property ("skipBars")))
{
- Moment barleft = (measure_length () - measure_position ());
+ Moment barleft = (measure_length () - measure_position (context ()));
Moment now = now_mom ();
- if (barleft > Moment (0)
- /*
- Hmm. We insert the bar moment every time we process a
- moment. A waste of cpu?
- */
- && !now.grace_part_)
- global_l->add_moment_to_process (now + barleft);
+ if (barleft > Moment (0))
+ {
+ Moment nextmom = now + barleft;
+ nextmom.grace_part_ = Rational (0);
+ global->add_moment_to_process (nextmom);
+ }
}
}
-
void
Timing_translator::initialize ()
{
- daddy_trans_l_->set_property ("timing" , SCM_BOOL_T);
- daddy_trans_l_->set_property ("currentBarNumber" , gh_int2scm (1));
-
- daddy_trans_l_->set_property ("timeSignatureFraction",
- gh_cons (gh_int2scm (4), gh_int2scm (4)));
- daddy_trans_l_->set_property ("measurePosition", Moment (Rational (0)).smobbed_copy ());
- daddy_trans_l_->set_property ("measureLength", Moment (Rational (1)).smobbed_copy ());
- daddy_trans_l_->set_property ("beatLength", Moment (Rational (1,4)).smobbed_copy ());
+ context ()->add_alias (ly_symbol2scm ("Timing"));
+ context ()->set_property ("currentBarNumber", scm_from_int (1));
+ context ()->set_property ("internalBarNumber", scm_from_int (1));
+
+ context ()->set_property ("timeSignatureFraction",
+ scm_cons (scm_from_int (4), scm_from_int (4)));
+ /*
+ Do not init measurePosition; this should be done from global
+ context.
+ */
+ context ()->set_property ("measureLength",
+ Moment (Rational (1)).smobbed_copy ());
+ context ()->set_property ("beatLength",
+ Moment (Rational (1, 4)).smobbed_copy ());
}
Rational
Timing_translator::Timing_translator ()
{
-
-}
-
-Moment
-Timing_translator::measure_position () const
-{
- SCM sm = get_property ("measurePosition");
-
- Moment m =0;
- if (unsmob_moment (sm))
- {
- m = *unsmob_moment (sm);
- while (m.main_part_ < Rational (0))
- m.main_part_ += measure_length ();
- }
-
- return m;
}
void
Timing_translator::start_translation_timestep ()
{
- Translator *t = this;
- Global_translator *global_l =0;
- do
- {
- t = t->daddy_trans_l_ ;
- global_l = dynamic_cast<Global_translator*> (t);
- }
- while (!global_l);
+ Global_context *global = get_global_context ();
- Moment now = global_l->now_mom_;
- Moment dt = now - global_l -> prev_mom_;
+ Moment now = global->now_mom ();
+ Moment dt = now - global->previous_moment ();
if (dt < Moment (0))
{
- programming_error ("Moving backwards in time");
+ programming_error ("moving backwards in time");
+ dt = 0;
+ }
+ else if (dt.main_part_.is_infinity ())
+ {
+ programming_error ("moving infinitely to future");
dt = 0;
}
-
+
if (!dt.to_bool ())
return;
SCM s = get_property ("measurePosition");
if (unsmob_moment (s))
- {
- measposp = *unsmob_moment (s);
- }
+ measposp = *unsmob_moment (s);
else
{
measposp = now;
- daddy_trans_l_->set_property ("measurePosition", measposp.smobbed_copy ());
+ context ()->set_property ("measurePosition",
+ measposp.smobbed_copy ());
}
-
+
measposp += dt;
-
- SCM barn = get_property ("currentBarNumber");
- int b = 0;
- if (gh_number_p (barn))
- {
- b = gh_scm2int (barn);
- }
+
+ int current_barnumber = robust_scm2int (get_property ("currentBarNumber"), 0);
+ int internal_barnumber = robust_scm2int (get_property ("internalBarNumber"), 0);
SCM cad = get_property ("timing");
- bool c= to_boolean (cad);
+ bool c = to_boolean (cad);
Rational len = measure_length ();
while (c && measposp.main_part_ >= len)
{
measposp.main_part_ -= len;
- b ++;
+ current_barnumber ++;
+ internal_barnumber ++;
}
- daddy_trans_l_->set_property ("currentBarNumber", gh_int2scm (b));
- daddy_trans_l_->set_property ("measurePosition", measposp.smobbed_copy ());
+ context ()->set_property ("currentBarNumber", scm_from_int (current_barnumber));
+ context ()->set_property ("internalBarNumber", scm_from_int (internal_barnumber));
+ context ()->set_property ("measurePosition", measposp.smobbed_copy ());
}
-ENTER_DESCRIPTION (Timing_translator, "","","","","" );
+#include "translator.icc"
+
+ADD_TRANSLATOR (Timing_translator,
+ /* doc */
+ "This engraver adds the alias @code{Timing} to its containing"
+ " context. 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}.",
+
+ /* create */
+ "",
+
+ /* read */
+ "internalBarNumber "
+ "currentBarNumber "
+ "measureLength "
+ "measurePosition ",
+
+ /* write */
+ "internalBarNumber "
+ "currentBarNumber "
+ "measurePosition "
+ );