/*
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--2006 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"
-Timing_translator::Timing_translator ()
+void
+Timing_translator::stop_translation_timestep ()
{
- default_grouping_ = Rhythmic_grouping (MInterval (0, 1), 4); // ugh
-}
+ Global_context *global = get_global_context ();
-bool
-Timing_translator::do_try_music (Music*r)
-{
- if (Timing_req *t = dynamic_cast <Timing_req *> (r))
+ if (to_boolean (get_property ("timing"))
+ && !to_boolean (get_property ("skipBars")))
{
- for (int i=0; i < timing_req_l_arr_.size (); i++)
- {
- 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;
- }
- }
-
- timing_req_l_arr_.push(t);
- return true;
+ 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->add_moment_to_process (now + barleft);
}
- 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 ("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);
- default_grouping_ =
- Rhythmic_grouping (MInterval (0,Moment (b_i, o_i)), b_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 by: %s",
- time_.whole_in_measure_.str ()));
-
- time_.whole_in_measure_ = 0; // resync
- time_.error_b_ = true;
- }
- }
- else if (Cadenza_req *cr = dynamic_cast <Cadenza_req *> (tr_l))
- {
- time_.set_cadenza (cr->on_b_);
- }
- else if (Measure_grouping_req *mg=dynamic_cast <Measure_grouping_req *> (tr_l))
- {
- default_grouping_ =
- parse_grouping (mg->beat_i_arr_,
- mg->elt_length_arr_);
-
- }
- }
+ 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);
- Global_translator *global_l =
- dynamic_cast<Global_translator*> (daddy_trans_l_->ancestor_l (100)); // ugh 100.
+ 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 ())
+ {
+ programming_error ("moving infinitely to future");
+ dt = 0;
+ }
+ if (!dt.to_bool ())
+ return;
- /* allbars == ! skipbars */
- bool allbars = ! get_property ("SkipBars", 0).to_bool ();
+ Moment measposp;
- // urg: multi bar rests: should always must process whole of first bar?
- if (!time_.cadenza_b_ && allbars)
- global_l->add_moment_to_process (time_.next_bar_moment ());
-}
+ SCM s = get_property ("measurePosition");
+ if (unsmob_moment (s))
+ measposp = *unsmob_moment (s);
+ else
+ {
+ measposp = now;
+ context ()->set_property ("measurePosition",
+ measposp.smobbed_copy ());
+ }
+ measposp += dt;
-ADD_THIS_TRANSLATOR(Timing_translator);
+ SCM barn = get_property ("currentBarNumber");
+ int b = 0;
+ if (scm_is_number (barn))
+ b = scm_to_int (barn);
-void
-Timing_translator::do_creation_processing()
-{
- time_.when_ = now_mom ();
-}
+ SCM cad = get_property ("timing");
+ bool c = to_boolean (cad);
-void
-Timing_translator::do_post_move_processing()
-{
- time_.add (now_mom () - time_.when_);
-}
+ Rational len = measure_length ();
+ while (c && measposp.main_part_ >= len)
+ {
+ measposp.main_part_ -= len;
+ b++;
+ }
-void
-Timing_translator::do_print () const
-{
-#ifndef NPRINT
- time_.print ();
- default_grouping_.print ();
-#endif
+ context ()->set_property ("currentBarNumber", scm_from_int (b));
+ context ()->set_property ("measurePosition", measposp.smobbed_copy ());
}
+
+#include "translator.icc"
+
+ADD_TRANSLATOR (Timing_translator,
+ "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}. "
+ "\n\nThis engraver adds the alias @code{Timing} to its containing context.",
+
+ "", "", "", "");
projects / lilypond.git / blobdiff