/*
- time_signature-reg.cc -- implement Time_signature_engraver
+ 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 "time-signature-engraver.hh"
-#include "time-signature.hh"
-#include "command-request.hh"
-#include "timing-engraver.hh"
#include "engraver-group.hh"
-Time_signature_engraver::Time_signature_engraver()
-{
- time_signature_p_ =0;
+#include "item.hh"
+#include "international.hh"
+#include "misc.hh"
+#include "moment.hh"
+#include "stream-event.hh"
+#include "warn.hh"
+
+#include "translator.icc"
+
+/**
+ generate time_signatures.
+*/
+class Time_signature_engraver : public Engraver
+{
+ Item *time_signature_;
+ SCM last_time_fraction_;
+ SCM time_cause_;
+
+protected:
+ virtual void derived_mark () const;
+ void stop_translation_timestep ();
+ void process_music ();
+public:
+ TRANSLATOR_DECLARATIONS (Time_signature_engraver);
+ void listen_time_signature (Stream_event *);
+};
+
+void
+Time_signature_engraver::derived_mark () const
+{
+ scm_gc_mark (last_time_fraction_);
+ scm_gc_mark (time_cause_);
+}
+
+Time_signature_engraver::Time_signature_engraver (Context *c)
+ : Engraver (c)
+{
+ time_signature_ = 0;
+ time_cause_ = SCM_EOL;
+ last_time_fraction_ = SCM_BOOL_F;
}
void
-Time_signature_engraver::do_process_requests()
+Time_signature_engraver::listen_time_signature (Stream_event *ev)
{
- Translator * result =
- daddy_grav_l()->get_simple_translator (Timing_engraver::static_name());
+ time_cause_ = ev->self_scm ();
+}
- if (!result)
+void
+Time_signature_engraver::process_music ()
+{
+ if (time_signature_)
+ return;
+
+ SCM fr = get_property ("timeSignatureFraction");
+ if (!scm_is_eq (last_time_fraction_, fr) && scm_is_pair (fr))
{
- warning (_ ("lost in time") + ": " + _ ("can't find")
- + " Timing_translator");
- return ;
+ time_signature_ = make_item ("TimeSignature", time_cause_);
+ time_signature_->set_property ("fraction", fr);
+
+ if (scm_is_false (last_time_fraction_))
+ time_signature_->set_property ("break-visibility",
+ get_property ("initialTimeSignatureVisibility"));
+
+ int den = scm_to_int (scm_cdr (fr));
+ if (den != (1 << intlog2 (den)))
+ {
+ /*
+ Todo: should make typecheck?
+
+ OTOH, Tristan Keuris writes 8/20 in his Intermezzi.
+ */
+ time_signature_->warning (_f ("strange time signature found: %d/%d",
+ int (scm_to_int (scm_car (fr))),
+ den));
+ }
+
+ last_time_fraction_ = fr;
}
-
- Timing_engraver * timing_grav_l= (Timing_engraver*) result->engraver_l ();
-
- Time_signature_change_req *req = timing_grav_l->time_signature_req_l();
- if (req)
+}
+
+void
+Time_signature_engraver::stop_translation_timestep ()
+{
+ if (time_signature_ && !scm_is_null (time_cause_))
{
- Array<Scalar> args;
- args.push (req->beats_i_);
- args.push (req->one_beat_i_);
-
- time_signature_p_ = new Time_signature ();
- time_signature_p_->args_ = args;
- time_signature_p_->break_priority_i_ = 1; // ugh
+ Moment *mp = unsmob<Moment> (get_property ("measurePosition"));
+ if (mp && (mp->main_part_ > Rational (0))
+ && !to_boolean (get_property ("partialBusy")))
+ time_signature_->warning ("mid-measure time signature without \\partial");
}
-
- if (time_signature_p_)
- announce_element (Score_element_info (time_signature_p_, req));
+ time_signature_ = 0;
+ time_cause_ = SCM_EOL;
}
void
-Time_signature_engraver::do_pre_move_processing()
+Time_signature_engraver::boot ()
{
- if (time_signature_p_)
- {
- Scalar sigstyle = get_property ("timeSignatureStyle");
- if (sigstyle.length_i ())
- {
- time_signature_p_->time_sig_type_str_ = sigstyle;
- }
-
- typeset_element (time_signature_p_);
- time_signature_p_ =0;
- }
+ ADD_LISTENER (Time_signature_engraver, time_signature);
}
+ADD_TRANSLATOR (Time_signature_engraver,
+ /* doc */
+ "Create a @ref{TimeSignature} whenever"
+ " @code{timeSignatureFraction} changes.",
+
+ /* create */
+ "TimeSignature ",
+
+ /* read */
+ "initialTimeSignatureVisibility "
+ "partialBusy "
+ "timeSignatureFraction ",
-ADD_THIS_TRANSLATOR(Time_signature_engraver);
-IMPLEMENT_IS_TYPE_B1(Time_signature_engraver,Engraver);
+ /* write */
+ ""
+ );