/*
- 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--2011 Jan Nieuwenhuizen <janneke@gnu.org>
- (c) 1997--2000 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"
-ADD_THIS_TRANSLATOR (Time_signature_performer);
+class Time_signature_performer : public Performer
+{
+public:
+ TRANSLATOR_DECLARATIONS (Time_signature_performer);
+ ~Time_signature_performer ();
-Time_signature_performer::Time_signature_performer ()
+protected:
+
+ void stop_translation_timestep ();
+ void process_music ();
+ virtual void derived_mark () const;
+ SCM prev_fraction_;
+private:
+
+ Audio_time_signature *audio_;
+};
+
+void
+Time_signature_performer::derived_mark () const
{
- time_signature_req_l_ = 0;
- audio_p_ = 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_)
+ SCM fr = get_property ("timeSignatureFraction");
+ if (scm_is_pair (fr) && !ly_is_equal (fr, prev_fraction_))
{
- audio_p_ = new Audio_time_signature (time_signature_req_l_->beats_i_, time_signature_req_l_->one_beat_i_);
- Audio_element_info info (audio_p_, time_signature_req_l_);
+ 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);
- time_signature_req_l_ = 0;
}
}
void
-Time_signature_performer::do_pre_move_processing ()
+Time_signature_performer::stop_translation_timestep ()
{
- if (audio_p_)
+ if (audio_)
{
- play_element (audio_p_);
- audio_p_ = 0;
+ audio_ = 0;
}
}
-bool
-Time_signature_performer::do_try_music (Music* req_l)
-{
- if (time_signature_req_l_)
- return false;
+#include "translator.icc"
- if (Time_signature_change_req *t =
- dynamic_cast <Time_signature_change_req *> (req_l))
- {
- time_signature_req_l_ = t;
- return true;
- }
+ADD_TRANSLATOR (Time_signature_performer,
+ /* doc */
+ "",
- return false;
-}
+ /* create */
+ "",
+
+ /* read */
+ "",
+ /* write */
+ ""
+ );