+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 2011 Mike Solomon <mike@apollinemike.com>
+
+ 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 "engraver.hh"
+
+#include "stream-event.hh"
+#include "item.hh"
+#include "pointer-group-interface.hh"
+#include "spanner.hh"
+
+#include "translator.icc"
+
+class Footnote_engraver : public Engraver
+{
+ TRANSLATOR_DECLARATIONS (Footnote_engraver);
+
+ DECLARE_TRANSLATOR_LISTENER (footnote);
+ DECLARE_ACKNOWLEDGER (grob);
+ DECLARE_END_ACKNOWLEDGER (grob);
+ vector<Stream_event *> events_;
+ vector<Drul_array<Spanner *> > annotated_spanners_;
+
+ void stop_translation_timestep ();
+
+ void footnotify (Grob *, Stream_event *);
+};
+
+IMPLEMENT_TRANSLATOR_LISTENER (Footnote_engraver, footnote);
+void
+Footnote_engraver::listen_footnote (Stream_event *ev)
+{
+ events_.push_back (ev);
+}
+
+void
+Footnote_engraver::stop_translation_timestep ()
+{
+ events_.clear ();
+}
+
+Footnote_engraver::Footnote_engraver ()
+{
+}
+
+void
+Footnote_engraver::footnotify (Grob *g, Stream_event *event)
+{
+ Spanner *s = dynamic_cast<Spanner *>(g);
+
+ if (s)
+ {
+ Spanner *b = make_spanner ("FootnoteSpanner", event->self_scm ());
+ b->set_parent (s, Y_AXIS);
+ b->set_parent (s, X_AXIS);
+ Grob *bound = unsmob_grob (get_property ("currentMusicalColumn"));
+ b->set_bound (LEFT, bound);
+ annotated_spanners_.push_back (Drul_array<Spanner *> (s,b));
+ }
+ else
+ {
+ Grob *b = make_item ("FootnoteItem", event->self_scm ());
+ b->set_parent (g, Y_AXIS);
+ b->set_parent (g, X_AXIS);
+ }
+}
+
+void
+Footnote_engraver::acknowledge_grob (Grob_info info)
+{
+ Stream_event *cause = info.event_cause ();
+
+ SCM arts = cause ? cause->get_property ("articulations") : SCM_EOL;
+ for (SCM s = arts; scm_is_pair (s); s = scm_cdr (s))
+ {
+ Stream_event *e = unsmob_stream_event (scm_car (s));
+ if (e->in_event_class ("footnote-event"))
+ footnotify (info.grob (), e);
+ }
+
+ for (vsize i = 0; i < events_.size (); i++)
+ {
+ if (info.grob ()->name () == ly_symbol2string (events_[i]->get_property ("symbol")))
+ footnotify (info.grob (), events_[i]);
+ }
+}
+
+void
+Footnote_engraver::acknowledge_end_grob (Grob_info info)
+{
+ Spanner *s = dynamic_cast<Spanner *>(info.grob ());
+
+ if (s)
+ for (vsize i = 0; i < annotated_spanners_.size (); i++)
+ {
+ if (annotated_spanners_[i][LEFT] == s)
+ {
+ Grob *bound = unsmob_grob (get_property ("currentMusicalColumn"));
+ annotated_spanners_[i][RIGHT]->set_bound (RIGHT, bound);
+ break;
+ }
+ }
+}
+
+ADD_ACKNOWLEDGER (Footnote_engraver, grob);
+ADD_END_ACKNOWLEDGER (Footnote_engraver, grob);
+
+ADD_TRANSLATOR (Footnote_engraver,
+ /* doc */
+ "Create footnote texts.",
+
+ /* create */
+ "FootnoteItem "
+ "FootnoteSpanner ",
+
+ /*read*/
+ "currentMusicalColumn ",
+
+ /*write*/
+ ""
+ );