source file of the GNU LilyPond music typesetter
- (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
+ (c) 1997--2002 Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "key-performer.hh"
+#include "lily-guile.hh"
#include "command-request.hh"
#include "audio-item.hh"
+#include "performer.hh"
+#include "warn.hh"
+class Key_performer : public Performer
+{
+public:
+ TRANSLATOR_DECLARATIONS(Key_performer);
+ ~Key_performer ();
+
+protected:
+ virtual bool try_music (Music* req_l);
+ virtual void create_audio_elements ();
+ virtual void stop_translation_timestep ();
-IMPLEMENT_IS_TYPE_B1(Key_performer,Performer);
-ADD_THIS_PERFORMER(Key_performer);
+private:
+ Key_change_req* key_req_l_;
+ Audio_key* audio_p_;
+};
-Key_performer::Key_performer()
+Key_performer::Key_performer ()
{
key_req_l_ = 0;
+ audio_p_ = 0;
}
-Key_performer::~Key_performer()
+Key_performer::~Key_performer ()
{
}
-void
-Key_performer::do_print() const
+void
+Key_performer::create_audio_elements ()
{
-#ifndef NPRINT
- if ( key_req_l_)
- key_req_l_->print();
-#endif
+ if (key_req_l_)
+ {
+ SCM pitchlist = key_req_l_->get_mus_property ("pitch-alist");
+ SCM proc = scm_primitive_eval (ly_symbol2scm ("accidentals-in-key"));
+ SCM acc = gh_call1 (proc, pitchlist);
+ proc = scm_primitive_eval (ly_symbol2scm ("major-key"));
+
+ Pitch my_do (0,
+ gh_scm2int (ly_caar (pitchlist)),
+ gh_scm2int (ly_cdar (pitchlist)));
+
+ Pitch to_c (-1,
+ (7 - gh_scm2int (ly_caar (pitchlist))) % 7,
+ -gh_scm2int (ly_cdar (pitchlist)));
+
+ my_do.transpose (to_c);
+ to_c.alteration_i_ -= my_do.alteration_i_;
+
+ Key_change_req *key = new Key_change_req;
+ key->set_mus_property ("pitch-alist", scm_list_copy (pitchlist));
+ ((Music*)key)->transpose (to_c);
+ SCM c_pitchlist = key->get_mus_property ("pitch-alist");
+ SCM major = gh_call1 (proc, c_pitchlist);
+
+ audio_p_ = new Audio_key (gh_scm2int (acc), major == SCM_BOOL_T);
+ Audio_element_info info (audio_p_, key_req_l_);
+ announce_element (info);
+ key_req_l_ = 0;
+ }
}
void
-Key_performer::process_requests()
+Key_performer::stop_translation_timestep ()
{
- if ( key_req_l_)
- play (new Audio_key (key_req_l_) );
- key_req_l_ = 0;
+ if (audio_p_)
+ {
+ play_element (audio_p_);
+ audio_p_ = 0;
+ }
}
bool
-Key_performer::do_try_request (Request* req_l)
+Key_performer::try_music (Music* req_l)
{
- if ( key_req_l_)
- return false;
-
- if ( req_l->command())
- key_req_l_ = req_l->command()->keychange ();
+ if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
+ {
+ if (key_req_l_)
+ warning (_ ("FIXME: key change merge"));
- if ( key_req_l_)
- return true;
+ key_req_l_ = kc;
+ return true;
+ }
return false;
}
+ENTER_DESCRIPTION(Key_performer,"","","","","");