/*
- time-signature-engraver.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--2004 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.hh"
-#include "warn.hh"
+#include "engraver-group.hh"
-#include "engraver.hh"
-#include "engraver-group-engraver.hh"
+#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.
- */
+ generate time_signatures.
+*/
class Time_signature_engraver : public Engraver
{
- Item * time_signature_;
+ Item *time_signature_;
SCM last_time_fraction_;
+ SCM time_cause_;
protected:
- virtual void stop_translation_timestep ();
- virtual void process_music ();
+ 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 ()
-{
- time_signature_ =0;
+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::listen_time_signature (Stream_event *ev)
+{
+ time_cause_ = ev->self_scm ();
+}
+
void
Time_signature_engraver::process_music ()
{
- /*
- not rigorously safe, since the value might get GC'd and
- reallocated in the same spot */
- SCM fr= get_property ("timeSignatureFraction");
- if (!time_signature_
- && last_time_fraction_ != fr
- && gh_pair_p (fr))
+ if (time_signature_)
+ return;
+
+ SCM fr = get_property ("timeSignatureFraction");
+ if (!scm_is_eq (last_time_fraction_, fr) && scm_is_pair (fr))
{
- int den = gh_scm2int (gh_cdr (fr));
+ 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.
- */
- warning (_f ("Found strange time signature %d/%d.",
- den,
- gh_scm2int (gh_car (fr))
- ));
- }
-
-
- last_time_fraction_ = fr;
- time_signature_ = make_item ("TimeSignature");
- time_signature_->set_property ("fraction",fr);
-
- if (time_signature_)
- announce_grob (time_signature_, SCM_EOL);
+ {
+ /*
+ 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;
}
}
void
Time_signature_engraver::stop_translation_timestep ()
{
- if (time_signature_)
+ if (time_signature_ && !scm_is_null (time_cause_))
{
- typeset_grob (time_signature_);
- time_signature_ =0;
+ 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");
}
+
+ time_signature_ = 0;
+ time_cause_ = SCM_EOL;
+}
+
+void
+Time_signature_engraver::boot ()
+{
+ ADD_LISTENER (Time_signature_engraver, time_signature);
}
-
-
-ENTER_DESCRIPTION (Time_signature_engraver,
-/* descr */ "Create a TimeSignature whenever @code{timeSignatureFraction} changes",
-/* creats*/ "TimeSignature",
-/* accepts */ "",
-/* acks */ "",
-/* reads */ "",
-/* write */ "");
+
+ADD_TRANSLATOR (Time_signature_engraver,
+ /* doc */
+ "Create a @ref{TimeSignature} whenever"
+ " @code{timeSignatureFraction} changes.",
+
+ /* create */
+ "TimeSignature ",
+
+ /* read */
+ "initialTimeSignatureVisibility "
+ "partialBusy "
+ "timeSignatureFraction ",
+
+ /* write */
+ ""
+ );