/*
- timing-translator.cc -- implement Timing_translator
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "timing-translator.hh"
-#include "command-request.hh"
+
+#include "warn.hh"
#include "translator-group.hh"
-#include "global-translator.hh"
-#include "multi-measure-rest.hh"
+#include "global-context.hh"
+#include "moment.hh"
+#include "lily-imports.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 ();
+
+ if (to_boolean (get_property ("timing"))
+ && !to_boolean (get_property ("skipBars")))
+ {
+ Moment barleft = (measure_length () - measure_position (context ()));
+ Moment now = now_mom ();
+
+ if (barleft > Moment (0))
+ {
+ Moment nextmom = now + barleft;
+ nextmom.grace_part_ = Rational (0);
+ global->add_moment_to_process (nextmom);
+ }
+ }
}
-bool
-Timing_translator::do_try_request(Request*r)
+void
+Timing_translator::initialize ()
{
- Command_req * c = r->access_Command_req ();
- if (!(c && c->access_Timing_req ()))
- return false;
- for (int i=0; i < timing_req_l_arr_.size (); i++)
+ Context *timing = unsmob<Context>
+ (Lily::ly_context_find (context ()->self_scm (), ly_symbol2scm ("Timing")));
+ if (timing != context ())
{
- if (timing_req_l_arr_[i]->equal_b(r))
- return true;
- if (timing_req_l_arr_[i]->name() == r->name())
- {
- r->warning (_ ("conflicting timing request"));
- return false;
- }
+ context ()->add_alias (ly_symbol2scm ("Timing"));
+
+ if (!timing)
+ {
+ programming_error ("Can't find Timing context template");
+ timing = context ();
+ }
}
- timing_req_l_arr_.push(c->access_Timing_req ());
- return true;
-}
+ SCM barnumber = timing->get_property ("currentBarNumber");
+ if (!scm_is_integer (barnumber))
+ barnumber = scm_from_int (1);
+ context ()->set_property ("currentBarNumber", barnumber);
+ context ()->set_property ("internalBarNumber", barnumber);
-Time_signature_change_req*
-Timing_translator::time_signature_req_l() const
-{
- Time_signature_change_req *m_l=0;
- for (int i=0; !m_l && i < timing_req_l_arr_.size (); i++)
+ SCM timeSignatureFraction = timing->get_property ("timeSignatureFraction");
+
+ if (!scm_is_pair (timeSignatureFraction))
{
- m_l=timing_req_l_arr_[i]->access_Time_signature_change_req ();
+ programming_error ("missing timeSignatureFraction");
+ timeSignatureFraction = scm_cons (scm_from_int (4), scm_from_int (4));
}
- return m_l;
-}
+ context ()->set_property ("timeSignatureFraction", timeSignatureFraction);
-void
-Timing_translator::do_process_requests()
-{
- for (int i=0; i < timing_req_l_arr_.size (); i++)
+ SCM measureLength = timing->get_property ("measureLength");
+
+ if (!unsmob<Moment> (measureLength))
{
- Timing_req * tr_l = timing_req_l_arr_[i];
- Time_signature_change_req *m_l = tr_l->access_Time_signature_change_req ();
- if (m_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 (tr_l->access_Partial_measure_req ())
- {
- Moment m = tr_l->access_Partial_measure_req ()->duration_;
- String error = time_.try_set_partial_str (m);
- if (error.length_i ())
- {
- tr_l->warning (error);
- }
- else
- time_.setpartial (m);
- }
- else if (tr_l->access_Barcheck_req())
- {
- 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 (tr_l->access_Cadenza_req ())
- {
- time_.set_cadenza (tr_l->access_Cadenza_req ()->on_b_);
- }
- else if (tr_l->access_Measure_grouping_req ())
- {
- default_grouping_ =
- parse_grouping (tr_l->access_Measure_grouping_req ()->beat_i_arr_,
- tr_l->access_Measure_grouping_req ()->elt_length_arr_);
-
- }
+ measureLength =
+ Moment (ly_scm2rational
+ (scm_divide (scm_car (timeSignatureFraction),
+ scm_cdr (timeSignatureFraction)))).smobbed_copy ();
}
-}
+ context ()->set_property ("measureLength", measureLength);
+ /*
+ Do not init measurePosition; this should be done from global
+ context.
+ */
-void
-Timing_translator::do_pre_move_processing()
-{
- timing_req_l_arr_.set_size (0);
- Global_translator *global_l =
- daddy_trans_l_->ancestor_l (100)->global_l (); // ugh 100.
+ SCM timeSignatureSettings = timing->get_property ("timeSignatureSettings");
+ if (!scm_is_pair (timeSignatureSettings))
+ {
+ programming_error ("missing timeSignatureSettings");
+ timeSignatureSettings = Lily::default_time_signature_settings;
+ }
+ context ()->set_property ("timeSignatureSettings", timeSignatureSettings);
+
+ SCM beamExceptions = timing->get_property ("beamExceptions");
+ if (!scm_is_pair (beamExceptions))
+ {
+ beamExceptions = Lily::beam_exceptions (timeSignatureFraction,
+ timeSignatureSettings);
+ }
+ context ()->set_property ("beamExceptions", beamExceptions);
+
+ SCM baseMoment = timing->get_property ("baseMoment");
+ if (!unsmob<Moment> (baseMoment))
+ {
+ baseMoment =
+ Moment (ly_scm2rational
+ (Lily::base_length (timeSignatureFraction,
+ timeSignatureSettings))).smobbed_copy ();
+ }
+ context ()->set_property ("baseMoment", baseMoment);
+
+ SCM beatStructure = timing->get_property ("beatStructure");
+ if (!scm_is_pair (beatStructure))
+ {
+ beatStructure =
+ Lily::beat_structure (ly_rational2scm (unsmob<Moment> (baseMoment)->main_part_),
+ timeSignatureFraction,
+ timeSignatureSettings);
+ }
+ context ()->set_property ("beatStructure", beatStructure);
+ context ()->set_property ("beamHalfMeasure",
+ timing->get_property ("beamHalfMeasure"));
- bool allbars = ! get_property ("SkipBars").to_bool ();
- if (!time_.cadenza_b_ && allbars)
- global_l->add_moment_to_process (time_.next_bar_moment ());
+ context ()->set_property ("autoBeaming",
+ timing->get_property ("autoBeaming"));
}
-IMPLEMENT_IS_TYPE_B1(Timing_translator, Translator);
-ADD_THIS_TRANSLATOR(Timing_translator);
+Rational
+Timing_translator::measure_length () const
+{
+ SCM l = get_property ("measureLength");
+ if (unsmob<Moment> (l))
+ return unsmob<Moment> (l)->main_part_;
+ else
+ return Rational (1);
+}
-void
-Timing_translator::do_creation_processing()
+Timing_translator::Timing_translator (Context *c)
+ : Translator (c)
{
- time_.when_ = now_moment ();
}
void
-Timing_translator::do_post_move_processing()
+Timing_translator::start_translation_timestep ()
{
- time_.add (now_moment () - time_.when_);
+ 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;
+
+ Moment measposp;
+
+ SCM s = get_property ("measurePosition");
+ if (unsmob<Moment> (s))
+ measposp = *unsmob<Moment> (s);
+ else
+ {
+ measposp = now;
+ }
+
+ 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);
+
+ if (c)
+ {
+ Rational len = measure_length ();
+
+ measposp += dt;
+
+ while (measposp.main_part_ >= len)
+ {
+ measposp.main_part_ -= len;
+ current_barnumber++;
+ internal_barnumber++;
+ }
+ }
+
+
+ // Because "timing" can be switched on and off asynchronously with
+ // graces, measurePosition might get into strange settings of
+ // grace_part_. It does not actually make sense to have it diverge
+ // from the main timing. Updating the grace part outside of the
+ // actual check for "timing" looks strange and will lead to changes
+ // of grace_part_ even when timing is off. However, when timing is
+ // switched back on again, this will generally happen in an override
+ // that does _not_ in itself advance current_moment. So the whole
+ // timing advance logic will only get triggered while "timing" is
+ // still of. Maybe we should keep measurePosition.grace_part_
+ // constantly at zero anyway?
+
+ measposp.grace_part_ = now.grace_part_;
+
+
+ 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"
+
void
-Timing_translator::do_print () const
+Timing_translator::boot ()
{
-#ifndef NPRINT
- time_.print ();
- default_grouping_.print ();
-#endif
+
}
+
+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 */
+ "baseMoment "
+ "currentBarNumber "
+ "internalBarNumber "
+ "measureLength "
+ "measurePosition "
+ "timeSignatureFraction ",
+
+ /* write */
+ "baseMoment "
+ "currentBarNumber "
+ "internalBarNumber "
+ "measureLength "
+ "measurePosition "
+ "timeSignatureFraction "
+ );
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