source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2008 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"
-/*
- TODO: change the rest of lily, so communication with
- Timing_translator is only done through properties. This means the
- class declaration can go here. */
-
-bool
-Timing_translator::try_music (Music*r)
-{
- if (dynamic_cast<Barcheck_req*> (r))
- {
- check_ = r;
- return true;
- }
- return false;
-}
-
-void
-Timing_translator::deprecated_process_music()
-{
- if (check_ && measure_position ())
- {
- check_->origin ()->warning (_f ("barcheck failed at: %s",
- measure_position ().str ()));
- Moment zero;
-
- if (!to_boolean (get_property ("barCheckNoSynchronize")))
- daddy_trans_l_->set_property("measurePosition", zero.smobbed_copy ());
- }
-
- SCM fr = get_property ("timeSignatureFraction");
-
- if (scm_equal_p (fr, last_time_sig_) == SCM_BOOL_F)
- {
- last_time_sig_ = fr;
- set_time_signature ();
- }
-}
-
-
void
-Timing_translator::stop_translation_timestep()
+Timing_translator::stop_translation_timestep ()
{
- check_ = 0;
-
- 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))
- global_l->add_moment_to_process (now_mom () + barleft);
+ {
+ Moment nextmom = now + barleft;
+ nextmom.grace_part_ = Rational (0);
+ global->add_moment_to_process (nextmom);
+ }
}
}
-
-ADD_THIS_TRANSLATOR(Timing_translator);
-
void
-Timing_translator::do_creation_processing()
+Timing_translator::initialize ()
{
- Moment m;
- daddy_trans_l_->set_property ("timing" , SCM_BOOL_T);
- daddy_trans_l_->set_property ("currentBarNumber" , gh_int2scm (1));
- daddy_trans_l_->set_property ("measurePosition", m.smobbed_copy ());
- daddy_trans_l_->set_property ("timeSignatureFraction",
- gh_cons (gh_int2scm (4), gh_int2scm (4)));
-
- set_time_signature ();
+ 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 ());
}
-Moment
+Rational
Timing_translator::measure_length () const
{
- SCM l = get_property("measureLength");
- if (unsmob_moment(l))
- return *unsmob_moment (l);
+ SCM l = get_property ("measureLength");
+ if (unsmob_moment (l))
+ return unsmob_moment (l)->main_part_;
else
- return Moment (1);
-}
-
-
-void
-Timing_translator::set_time_signature ()
-{
- SCM fr = get_property ("timeSignatureFraction");
- int l = gh_scm2int (gh_car (fr));
- int o = gh_scm2int (gh_cdr (fr));
-
- Moment one_beat = Moment (1)/Moment (o);
- Moment len = Moment (l) * one_beat;
-
- daddy_trans_l_->set_property ("measureLength", len.smobbed_copy ());
- daddy_trans_l_->set_property ("beatLength", one_beat.smobbed_copy ());
-}
-
-Timing_translator::Timing_translator()
-{
-
- last_time_sig_ = SCM_BOOL_F;
-
+ return Rational (1);
}
-
-Moment
-Timing_translator::measure_position () const
+Timing_translator::Timing_translator ()
{
- SCM sm = get_property ("measurePosition");
-
- Moment m =0;
- if (unsmob_moment (sm))
- {
- m = *unsmob_moment(sm);
- while (m < Moment (0))
- m += measure_length ();
- }
-
- return m;
}
void
-Timing_translator::start_translation_timestep()
+Timing_translator::start_translation_timestep ()
{
- check_ =00;
- 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 dt = global_l->now_mom_ - 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)
+
+ if (!dt.to_bool ())
return;
Moment measposp;
SCM s = get_property ("measurePosition");
if (unsmob_moment (s))
- {
- measposp = *unsmob_moment(s);
- }
+ measposp = *unsmob_moment (s);
else
{
- daddy_trans_l_->set_property ("measurePosition", measposp.smobbed_copy());
+ measposp = now;
+ 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);
- Moment len = measure_length ();
- while (c && measposp >= len)
+ Rational len = measure_length ();
+ while (c && measposp.main_part_ >= len)
{
- measposp -= len;
- b ++;
+ measposp.main_part_ -= len;
+ 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 ());
}
+#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 "
+ );
projects / lilypond.git / blobdiff