-
/*
timing-translator.cc -- implement Timing_translator
+
source file of the GNU LilyPond music typesetter
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.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"
-Timing_translator::Timing_translator()
+void
+Timing_translator::stop_translation_timestep ()
{
- default_grouping_ = Rhythmic_grouping (MInterval (0,4),4); // ugh
-}
+ Global_context *global = get_global_context ();
-bool
-Timing_translator::do_try_request(Request*r)
-{
- Command_req * c = r->command();
- if (!(c && c->timing()))
- return false;
- for (int i=0; i < timing_req_l_arr_.size (); i++)
+ if (to_boolean (get_property ("timing"))
+ && !to_boolean (get_property ("skipBars")))
{
- if (timing_req_l_arr_[i]->equal_b(r))
- return true;
- if (timing_req_l_arr_[i]->name() == r->name())
+ Moment barleft = (measure_length () - measure_position (context ()));
+ Moment now = now_mom ();
+
+ if (barleft > Moment (0))
{
- 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(c->timing());
- return true;
}
-Meter_change_req*
-Timing_translator::meter_req_l() const
+void
+Timing_translator::initialize ()
+{
+ 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::measure_length () const
+{
+ SCM l = get_property ("measureLength");
+ if (unsmob_moment (l))
+ return unsmob_moment (l)->main_part_;
+ else
+ return Rational (1);
+}
+
+Timing_translator::Timing_translator ()
{
- Meter_change_req *m_l=0;
- for (int i=0; !m_l && i < timing_req_l_arr_.size (); i++)
- {
- m_l=timing_req_l_arr_[i]->meterchange();
- }
- return m_l;
}
void
-Timing_translator::do_process_requests()
+Timing_translator::start_translation_timestep ()
{
- for (int i=0; i < timing_req_l_arr_.size (); i++)
+ Global_context *global = get_global_context ();
+
+ Moment now = global->now_mom ();
+ Moment dt = now - global->previous_moment ();
+ if (dt < Moment (0))
{
- Timing_req * tr_l = timing_req_l_arr_[i];
- Meter_change_req *m_l = tr_l->meterchange();
- if (m_l)
- {
- int b_i= m_l->beats_i_;
- int o_i = m_l->one_beat_i_;
- if (! time_.allow_meter_change_b())
- tr_l->warning ("Meter change not allowed here");
- else
- {
- time_.set_meter (b_i, o_i);
- default_grouping_ =
- Rhythmic_grouping (MInterval (0,Moment (b_i, o_i)), b_i);
- }
- }
- else if (tr_l->partial())
- {
- Moment m = tr_l->partial()->duration_;
- String error = time_.try_set_partial_str (m);
- if (error)
- {
- tr_l->warning (error);
- }
- else
- time_.setpartial (m);
- }
- else if (tr_l->barcheck())
- {
- if (time_.whole_in_measure_)
- {
- tr_l ->warning ("Barcheck failed");
-
- time_.whole_in_measure_ = 0; // resync
- time_.error_b_ = true;
- }
+ programming_error ("moving backwards in time");
+ dt = 0;
+ }
+ else if (dt.main_part_.is_infinity ())
+ {
+ programming_error ("moving infinitely to future");
+ dt = 0;
+ }
- }
- else if (tr_l->cadenza())
- {
- time_.set_cadenza (tr_l->cadenza()->on_b_);
+ if (!dt.to_bool ())
+ return;
- }
- else if (tr_l->measuregrouping())
- {
- default_grouping_ =
- parse_grouping (tr_l->measuregrouping()->beat_i_arr_,
- tr_l->measuregrouping()->elt_length_arr_);
+ 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 ());
}
-}
+ measposp += dt;
-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.
-
- if (!time_.cadenza_b_)
- global_l->add_moment_to_process (time_.next_bar_moment ());
-}
+ int current_barnumber = robust_scm2int (get_property ("currentBarNumber"), 0);
+ int internal_barnumber = robust_scm2int (get_property ("internalBarNumber"), 0);
-IMPLEMENT_IS_TYPE_B1(Timing_translator, Translator);
-ADD_THIS_TRANSLATOR(Timing_translator);
+ SCM cad = get_property ("timing");
+ bool c = to_boolean (cad);
-void
-Timing_translator::do_creation_processing()
-{
- time_.when_ = now_moment ();
-}
+ Rational len = measure_length ();
+ while (c && measposp.main_part_ >= len)
+ {
+ measposp.main_part_ -= len;
+ current_barnumber ++;
+ internal_barnumber ++;
+ }
-void
-Timing_translator::do_post_move_processing()
-{
- time_.add (now_moment () - time_.when_);
+ 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