/*
- time_signature-performer.cc -- implement Time_signature_performer
+ time-signature-performer.cc -- implement Time_signature_performer
source file of the GNU LilyPond music typesetter
- (c) 1997--1999 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1997--2009 Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#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:
-ADD_THIS_TRANSLATOR(Time_signature_performer);
+ void stop_translation_timestep ();
+ void process_music ();
+ virtual void derived_mark () const;
+ SCM prev_fraction_;
+private:
-Time_signature_performer::Time_signature_performer()
+ Audio_time_signature *audio_;
+};
+
+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_music (Music* req_l)
+void
+Time_signature_performer::stop_translation_timestep ()
{
- if (time_signature_req_l_)
- return false;
-
- if (Time_signature_change_req *t =
- dynamic_cast <Time_signature_change_req *> (req_l))
+ if (audio_)
{
- time_signature_req_l_ = t;
- return true;
+ audio_ = 0;
}
-
- return false;
}
+#include "translator.icc"
+
+ADD_TRANSLATOR (Time_signature_performer,
+ /* doc */
+ "",
+
+ /* create */
+ "",
+
+ /* read */
+ "",
+
+ /* write */
+ ""
+ );