source file of the GNU LilyPond music typesetter
- (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- */
+ (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
-
-
-#include "event.hh"
-#include "item.hh"
#include "bar-line.hh"
-#include "staff-symbol-referencer.hh"
+#include "clef.hh"
#include "context.hh"
#include "engraver.hh"
+#include "item.hh"
#include "pitch.hh"
#include "protected-scm.hh"
-#include "clef.hh"
+#include "staff-symbol-referencer.hh"
+#include "stream-event.hh"
-/*
- TODO: The representation of key sigs is all fucked.
- */
+#include "translator.icc"
-/**
- Make the key signature.
- */
class Key_engraver : public Engraver
{
void create_key (bool);
- void read_ev (Music const * r);
- Music * key_ev_;
- Item * item_;
+ void read_event (Stream_event const *r);
+ Stream_event *key_event_;
+ Item *item_;
+ Item *cancellation_;
public:
TRANSLATOR_DECLARATIONS (Key_engraver);
protected:
virtual void initialize ();
virtual void finalize ();
- virtual bool try_music (Music *ev);
- virtual void stop_translation_timestep ();
- virtual void start_translation_timestep ();
- virtual void process_music ();
- virtual void acknowledge_grob (Grob_info);
-};
+ void stop_translation_timestep ();
+ void process_music ();
+ DECLARE_TRANSLATOR_LISTENER (key_change);
+ DECLARE_ACKNOWLEDGER (clef);
+ DECLARE_ACKNOWLEDGER (bar_line);
+};
void
Key_engraver::finalize ()
{
}
-
Key_engraver::Key_engraver ()
{
- key_ev_ = 0;
+ key_event_ = 0;
item_ = 0;
+ cancellation_ = 0;
}
void
-Key_engraver::create_key (bool def)
+Key_engraver::create_key (bool is_default)
{
- if (!item_)
+ if (!item_)
{
- item_ = make_item ("KeySignature", key_ev_ ? key_ev_->self_scm () : SCM_EOL);
+ item_ = make_item ("KeySignature",
+ key_event_ ? key_event_->self_scm () : SCM_EOL);
item_->set_property ("c0-position",
get_property ("middleCPosition"));
-
- if (to_boolean (get_property ("printKeyCancellation")))
- item_->set_property ("old-accidentals", get_property ("lastKeySignature"));
- item_->set_property ("new-accidentals", get_property ("keySignature"));
+ SCM last = get_property ("lastKeySignature");
+ SCM key = get_property ("keySignature");
+ bool extranatural = to_boolean (get_property ("extraNatural"));
+
+ if ((to_boolean (get_property ("printKeyCancellation"))
+ || key == SCM_EOL)
+ && !scm_is_eq (last, key))
+ {
+ SCM restore = SCM_EOL;
+ SCM *tail = &restore;
+ for (SCM s = last; scm_is_pair (s); s = scm_cdr (s))
+ {
+ SCM new_alter_pair = scm_assoc (scm_caar (s), key);
+ Rational old_alter = robust_scm2rational (scm_cdar (s), 0);
+ if (new_alter_pair == SCM_BOOL_F
+ || extranatural
+ && (ly_scm2rational (scm_cdr (new_alter_pair)) - old_alter)*old_alter < Rational (0))
+ {
+ *tail = scm_cons (scm_car (s), *tail);
+ tail = SCM_CDRLOC (*tail);
+ }
+ }
+
+ if (scm_is_pair (restore))
+ {
+ cancellation_ = make_item ("KeyCancellation",
+ key_event_
+ ? key_event_->self_scm () : SCM_EOL);
+
+ cancellation_->set_property ("alteration-alist", restore);
+ cancellation_->set_property ("c0-position",
+ get_property ("middleCPosition"));
+ }
+ }
+
+ item_->set_property ("alteration-alist", key);
}
- if (!def)
+ if (!is_default)
{
- SCM vis = get_property ("explicitKeySignatureVisibility");
- if (ly_c_procedure_p (vis))
- item_->set_property ("break-visibility",vis);
+ SCM visibility = get_property ("explicitKeySignatureVisibility");
+ item_->set_property ("break-visibility", visibility);
}
-}
-
+}
-bool
-Key_engraver::try_music (Music * ev)
+IMPLEMENT_TRANSLATOR_LISTENER (Key_engraver, key_change);
+void
+Key_engraver::listen_key_change (Stream_event *ev)
{
- if (ev->is_mus_type ("key-change-event"))
- {
- if (!key_ev_)
- {
- /*
- do this only once, just to be on the safe side.
- */
- key_ev_ = ev;
- read_ev (key_ev_);
- }
-
- return true;
- }
- return false;
+ /* do this only once, just to be on the safe side. */
+ if (ASSIGN_EVENT_ONCE (key_event_, ev))
+ read_event (key_event_);
}
-
void
-Key_engraver::acknowledge_grob (Grob_info info)
+Key_engraver::acknowledge_clef (Grob_info info)
{
- if (Clef::has_interface (info.grob_))
- {
- SCM c = get_property ("createKeyOnClefChange");
- if (to_boolean (c))
- {
- create_key (false);
- }
- }
- else if (Bar_line::has_interface (info.grob_)
- && ly_c_pair_p (get_property ("keySignature")))
- {
- create_key (true);
- }
+ (void)info;
+ SCM c = get_property ("createKeyOnClefChange");
+ if (to_boolean (c))
+ create_key (false);
}
+void
+Key_engraver::acknowledge_bar_line (Grob_info info)
+{
+ (void)info;
+ if (scm_is_pair (get_property ("keySignature")))
+ create_key (true);
+}
void
Key_engraver::process_music ()
{
- if (key_ev_ ||
- get_property ("lastKeySignature") != get_property ("keySignature"))
+ if (key_event_
+ || get_property ("lastKeySignature") != get_property ("keySignature"))
create_key (false);
}
-
void
Key_engraver::stop_translation_timestep ()
{
- if (item_)
- {
- typeset_grob (item_);
- item_ = 0;
- }
+ item_ = 0;
+ context ()->set_property ("lastKeySignature", get_property ("keySignature"));
+ cancellation_ = 0;
+ key_event_ = 0;
}
-
void
-Key_engraver::read_ev (Music const * r)
+Key_engraver::read_event (Stream_event const *r)
{
SCM p = r->get_property ("pitch-alist");
- if (!ly_c_pair_p (p))
+ if (!scm_is_pair (p))
return;
- SCM n = scm_list_copy (p);
SCM accs = SCM_EOL;
- for (SCM s = get_property ("keyAccidentalOrder");
- ly_c_pair_p (s); s = ly_cdr (s))
+
+ SCM alist = scm_list_copy (p);
+ SCM order = get_property ("keyAlterationOrder");
+ for (SCM s = order;
+ scm_is_pair (s) && scm_is_pair (alist); s = scm_cdr (s))
{
- if (ly_c_pair_p (scm_member (ly_car (s), n)))
+ SCM head = scm_member (scm_car (s), alist);
+
+ if (scm_is_pair (head))
{
- accs = scm_cons (ly_car (s), accs);
- n = scm_delete_x (ly_car (s), n);
+ accs = scm_cons (scm_car (head), accs);
+ alist = scm_delete_x (scm_car (head), alist);
}
}
-
- for (SCM s = n ; ly_c_pair_p (s); s = ly_cdr (s))
- if (ly_scm2int (ly_cdar (s)))
- accs = scm_cons (ly_car (s), accs);
+ if (scm_is_pair (alist))
+ {
+ bool warn = false;
+ for (SCM s = alist; scm_is_pair (s); s = scm_cdr (s))
+ if (ly_scm2rational (scm_cdar (s)))
+ {
+ warn = true;
+ accs = scm_cons (scm_car (s), accs);
+ }
+
+ if (warn)
+ r->origin ()->warning ("No ordering for key signature alterations");
+ }
+
context ()->set_property ("keySignature", accs);
- context ()->set_property ("tonic" ,
- r->get_property ("tonic"));
-}
-
-
-void
-Key_engraver::start_translation_timestep ()
-{
- key_ev_ = 0;
- context ()->set_property ("lastKeySignature", get_property ("keySignature"));
+ context ()->set_property ("tonic",
+ r->get_property ("tonic"));
}
-
void
Key_engraver::initialize ()
{
context ()->set_property ("keySignature", SCM_EOL);
context ()->set_property ("lastKeySignature", SCM_EOL);
- Pitch p (0,0,0);
+ Pitch p (0, 0, 0);
context ()->set_property ("tonic", p.smobbed_copy ());
-
}
-
-ENTER_DESCRIPTION (Key_engraver,
-/* descr */ "",
-/* creats*/ "KeySignature",
-/* accepts */ "key-change-event",
-/* acks */ "bar-line-interface clef-interface",
-/* reads */ "keySignature printKeyCancellation lastKeySignature explicitKeySignatureVisibility createKeyOnClefChange keyAccidentalOrder keySignature",
-/* write */ "lastKeySignature tonic keySignature");
+ADD_ACKNOWLEDGER (Key_engraver, clef);
+ADD_ACKNOWLEDGER (Key_engraver, bar_line);
+
+ADD_TRANSLATOR (Key_engraver,
+ /* doc */
+ "Engrave a key signature.",
+
+ /* create */
+ "KeySignature ",
+
+ /* read */
+ "createKeyOnClefChange "
+ "explicitKeySignatureVisibility "
+ "extraNatural "
+ "keyAlterationOrder "
+ "keySignature "
+ "lastKeySignature "
+ "printKeyCancellation ",
+
+ /* write */
+ "keySignature "
+ "lastKeySignature "
+ "tonic "
+ );
projects / lilypond.git / blobdiff