/*
- time_signature-performer.cc -- implement Time_signature_performer
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2014 Jan Nieuwenhuizen <janneke@gnu.org>
- (c) 1997--1998 Jan Nieuwenhuizen <janneke@gnu.org>
+ 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-performer.hh"
-#include "command-request.hh"
#include "audio-item.hh"
+#include "performer.hh"
+#include "protected-scm.hh"
+
+class Time_signature_performer : public Performer
+{
+public:
+ TRANSLATOR_DECLARATIONS (Time_signature_performer);
+ ~Time_signature_performer ();
+
+protected:
+
+ void stop_translation_timestep ();
+ void process_music ();
+ virtual void derived_mark () const;
+ SCM prev_fraction_;
+private:
-IMPLEMENT_IS_TYPE_B1(Time_signature_performer,Performer);
-ADD_THIS_TRANSLATOR(Time_signature_performer);
+ Audio_time_signature *audio_;
+};
-Time_signature_performer::Time_signature_performer()
+void
+Time_signature_performer::derived_mark () const
{
- time_signature_req_l_ = 0;
+ scm_gc_mark (prev_fraction_);
}
-Time_signature_performer::~Time_signature_performer()
+Time_signature_performer::Time_signature_performer ()
{
+ prev_fraction_ = SCM_BOOL_F;
+ audio_ = 0;
}
-void
-Time_signature_performer::do_print() const
+Time_signature_performer::~Time_signature_performer ()
{
-#ifndef NPRINT
- if (time_signature_req_l_)
- time_signature_req_l_->print();
-#endif
}
void
-Time_signature_performer::do_process_requests()
+Time_signature_performer::process_music ()
{
- if (time_signature_req_l_)
- play (new Audio_time_signature (time_signature_req_l_));
- time_signature_req_l_ = 0;
+ SCM fr = get_property ("timeSignatureFraction");
+ if (scm_is_pair (fr) && !ly_is_equal (fr, prev_fraction_))
+ {
+ prev_fraction_ = fr;
+ int b = scm_to_int (scm_car (fr));
+ int o = scm_to_int (scm_cdr (fr));
+
+ audio_ = new Audio_time_signature (b, o);
+ Audio_element_info info (audio_, 0);
+ announce_element (info);
+ }
}
-bool
-Time_signature_performer::do_try_request (Request* req_l)
+void
+Time_signature_performer::stop_translation_timestep ()
{
- if (time_signature_req_l_)
- return false;
+ if (audio_)
+ {
+ audio_ = 0;
+ }
+}
- if (req_l->access_Command_req ())
- time_signature_req_l_ = req_l->access_Command_req ()->access_Time_signature_change_req ();
+#include "translator.icc"
- if (time_signature_req_l_)
- return true;
+ADD_TRANSLATOR (Time_signature_performer,
+ /* doc */
+ "",
- return false;
-}
+ /* create */
+ "",
+
+ /* read */
+ "",
+ /* write */
+ ""
+ );