/*
- key-engraver.cc -- implement Key_engraver
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
- */
+ 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 "event.hh"
-#include "item.hh"
-#include "bar-line.hh"
-#include "staff-symbol-referencer.hh"
+#include "clef.hh"
#include "context.hh"
#include "engraver.hh"
+#include "international.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 ();
+ void listen_key_change (Stream_event *);
+ void acknowledge_clef (Grob_info);
+ void acknowledge_bar_line (Grob_info);
+};
void
Key_engraver::finalize ()
{
}
-
-Key_engraver::Key_engraver ()
+Key_engraver::Key_engraver (Context *c)
+ : Engraver (c)
{
- 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);
+ /* Use middleCClefPosition rather than middleCPosition, because cue
+ * notes with a different clef will modify middleCPosition. The
+ * Key signature, however, should still be printed at the original
+ * position. */
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"));
+ get_property ("middleCClefPosition"));
+
+ SCM last = get_property ("lastKeyAlterations");
+ SCM key = get_property ("keyAlterations");
+
+ if ((to_boolean (get_property ("printKeyCancellation"))
+ || scm_is_null (key))
+ && !scm_is_eq (last, key))
+ {
+ SCM restore = SCM_EOL;
+ 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 (scm_is_false (new_alter_pair)
+ || ((ly_scm2rational (scm_cdr (new_alter_pair)) - old_alter) * old_alter
+ < Rational (0)))
+ {
+ restore = scm_cons (scm_car (s), restore);
+ }
+ }
+
+ 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 ("middleCClefPosition"));
+ }
+ }
+
+ item_->set_property ("alteration-alist", scm_reverse (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);
+ item_->set_property ("non-default", SCM_BOOL_T);
}
-}
-
+}
-bool
-Key_engraver::try_music (Music * ev)
+void
+Key_engraver::listen_key_change (Stream_event *ev)
{
- if (ev->is_mus_type ("key-change-event"))
- {
- /* do this only once, just to be on the safe side. */
- if (!key_ev_)
- {
- 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);
- }
+ SCM c = get_property ("createKeyOnClefChange");
+ if (to_boolean (c))
+ create_key (false);
}
+void
+Key_engraver::acknowledge_bar_line (Grob_info /* info */)
+{
+ create_key (true);
+}
void
Key_engraver::process_music ()
{
- if (key_ev_ ||
- get_property ("lastKeySignature") != get_property ("keySignature"))
+ if (key_event_
+ || !scm_is_eq (get_property ("lastKeyAlterations"),
+ get_property ("keyAlterations")))
create_key (false);
}
-
void
Key_engraver::stop_translation_timestep ()
{
item_ = 0;
- context ()->set_property ("lastKeySignature", get_property ("keySignature"));
+ context ()->set_property ("lastKeyAlterations", get_property ("keyAlterations"));
+ 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)))
- {
- accs = scm_cons (ly_car (s), accs);
- n = scm_delete_x (ly_car (s), n);
- }
+ SCM head = scm_member (scm_car (s), alist);
+
+ if (scm_is_pair (head))
+ {
+ 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);
-
- context ()->set_property ("keySignature", accs);
- context ()->set_property ("tonic" ,
- r->get_property ("tonic"));
-}
+ 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 (_ ("Incomplete keyAlterationOrder for key signature"));
+ }
-void
-Key_engraver::start_translation_timestep ()
-{
- key_ev_ = 0;
+ context ()->set_property ("keyAlterations", scm_reverse_x (accs, SCM_EOL));
+ context ()->set_property ("tonic",
+ r->get_property ("tonic"));
}
-
void
Key_engraver::initialize ()
{
- context ()->set_property ("keySignature", SCM_EOL);
- context ()->set_property ("lastKeySignature", SCM_EOL);
+ context ()->set_property ("keyAlterations", SCM_EOL);
+ context ()->set_property ("lastKeyAlterations", SCM_EOL);
- Pitch p (0,0,0);
+ Pitch p;
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");
+void
+Key_engraver::boot ()
+{
+ ADD_LISTENER (Key_engraver, key_change);
+ ADD_ACKNOWLEDGER (Key_engraver, clef);
+ ADD_ACKNOWLEDGER (Key_engraver, bar_line);
+}
+
+ADD_TRANSLATOR (Key_engraver,
+ /* doc */
+ "Engrave a key signature.",
+
+ /* create */
+ "KeyCancellation "
+ "KeySignature ",
+
+ /* read */
+ "createKeyOnClefChange "
+ "explicitKeySignatureVisibility "
+ "extraNatural "
+ "keyAlterationOrder "
+ "keyAlterations "
+ "lastKeyAlterations "
+ "printKeyCancellation "
+ "middleCClefPosition ",
+
+ /* write */
+ "keyAlterations "
+ "lastKeyAlterations "
+ "tonic "
+ );
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