/*
timing-translator.cc -- implement Timing_translator
+
source file of the GNU LilyPond music typesetter
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#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"
-bool
-Timing_translator::do_try_music (Music*r)
+void
+Timing_translator::stop_translation_timestep ()
{
- if (Timing_req *t = dynamic_cast <Timing_req *> (r))
+ Global_context *global = get_global_context ();
+
+ if (to_boolean (get_property ("timing"))
+ && !to_boolean (get_property ("skipBars")))
{
- for (int i=0; i < timing_req_l_arr_.size (); i++)
+ Moment barleft = (measure_length () - measure_position (context ()));
+ Moment now = now_mom ();
+
+ if (barleft > Moment (0))
{
- if (timing_req_l_arr_[i]->equal_b(t))
- return true;
- if (String (classname (timing_req_l_arr_[i])) == classname (r))
- {
- r->warning (_ ("conflicting timing request"));
- return false;
- }
+ Moment nextmom = now + barleft;
+ nextmom.grace_part_ = Rational (0);
+ global->add_moment_to_process (nextmom);
}
-
- timing_req_l_arr_.push(t);
- return true;
}
- return false;
}
-/*ugh.
- */
-Time_signature_change_req*
-Timing_translator::time_signature_req_l() const
+void
+Timing_translator::initialize ()
{
- Time_signature_change_req *m_l=0;
- for (int i=0; !m_l && i < timing_req_l_arr_.size (); i++)
- {
- m_l=dynamic_cast<Time_signature_change_req*> (timing_req_l_arr_[i]);
- }
- return m_l;
+ 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 ());
}
-void
-Timing_translator::do_process_requests()
+Rational
+Timing_translator::measure_length () const
{
- for (int i=0; i < timing_req_l_arr_.size (); i++)
- {
- Timing_req * tr_l = timing_req_l_arr_[i];
-
- if (Time_signature_change_req *m_l = dynamic_cast <Time_signature_change_req *> (tr_l))
- {
- int b_i= m_l->beats_i_;
- int o_i = m_l->one_beat_i_;
- if (! time_.allow_time_signature_change_b())
- tr_l->warning (_ ("time signature change not allowed here"));
- else
- {
- time_.set_time_signature (b_i, o_i);
- }
- }
- else if (Partial_measure_req *pm = dynamic_cast <Partial_measure_req *> (tr_l))
- {
- Moment m = pm->length_mom_;
- String error = time_.try_set_partial_str (m);
- if (error.length_i ())
- {
- tr_l->warning (error);
- }
- else
- time_.setpartial (m);
- }
- else if (dynamic_cast <Barcheck_req *> (tr_l))
- {
- if (time_.whole_in_measure_)
- {
- tr_l ->warning (_f ("barcheck failed at: %s",
- time_.whole_in_measure_.str ()));
-
- time_.whole_in_measure_ = 0; // resync
- }
- }
- else if (Cadenza_req *cr = dynamic_cast <Cadenza_req *> (tr_l))
- {
- time_.set_cadenza (cr->on_b_);
- }
- }
-
- Translator_group * tr=0;
-
- Scalar barn = get_property ("currentBarNumber", &tr);
- if (!barn.empty_b () && barn.isnum_b ())
- {
- time_.bars_i_ = int(barn);
- tr->set_property ("currentBarNumber", "");
- }
-
-
+ SCM l = get_property ("measureLength");
+ if (unsmob_moment (l))
+ return unsmob_moment (l)->main_part_;
+ else
+ return Rational (1);
}
+Timing_translator::Timing_translator ()
+{
+}
void
-Timing_translator::do_pre_move_processing()
+Timing_translator::start_translation_timestep ()
{
- timing_req_l_arr_.set_size (0);
- Translator *t = this;
- Global_translator *global_l =0;
- do
+ Global_context *global = get_global_context ();
+
+ Moment now = global->now_mom ();
+ Moment dt = now - global->previous_moment ();
+ if (dt < Moment (0))
+ {
+ programming_error ("moving backwards in time");
+ dt = 0;
+ }
+ else if (dt.main_part_.is_infinity ())
{
- t = t->daddy_trans_l_ ;
- global_l = dynamic_cast<Global_translator*> (t);
+ programming_error ("moving infinitely to future");
+ dt = 0;
}
- while (!global_l);
- /* allbars == ! skipbars */
- bool allbars = ! get_property ("skipBars", 0).to_bool ();
+ if (!dt.to_bool ())
+ return;
- // urg: multi bar rests: should always process whole of first bar?
- if (!time_.cadenza_b_ && allbars)
- global_l->add_moment_to_process (time_.next_bar_moment ());
-}
+ Moment measposp;
+ SCM s = get_property ("measurePosition");
+ if (unsmob_moment (s))
+ measposp = *unsmob_moment (s);
+ else
+ {
+ measposp = now;
+ context ()->set_property ("measurePosition",
+ measposp.smobbed_copy ());
+ }
-ADD_THIS_TRANSLATOR(Timing_translator);
+ measposp += dt;
-void
-Timing_translator::do_creation_processing()
-{
- time_.when_ = now_mom ();
-}
+ int current_barnumber = robust_scm2int (get_property ("currentBarNumber"), 0);
+ int internal_barnumber = robust_scm2int (get_property ("internalBarNumber"), 0);
-void
-Timing_translator::do_post_move_processing()
-{
- time_.add (now_mom () - time_.when_);
+ SCM cad = get_property ("timing");
+ bool c = to_boolean (cad);
+ Rational len = measure_length ();
+ while (c && measposp.main_part_ >= len)
+ {
+ measposp.main_part_ -= len;
+ current_barnumber ++;
+ internal_barnumber ++;
+ }
+ 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 ());
}
-void
-Timing_translator::do_print () const
-{
-#ifndef NPRINT
- time_.print ();
-#endif
-}
+#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