X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Ffootnote-engraver.cc;fp=lily%2Ffootnote-engraver.cc;h=7539bf95039e3ff33be4d8cd93086ab2bad28a50;hb=941dff9d2a67080e0dd8474f1e70f0c72ace6424;hp=0000000000000000000000000000000000000000;hpb=5a22d6233a39d3164e1ca043244794c268be4ad0;p=lilypond.git

diff --git a/lily/footnote-engraver.cc b/lily/footnote-engraver.cc
new file mode 100644
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+++ b/lily/footnote-engraver.cc
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+/*
+  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*/
+	       ""
+	       );