X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fpaper-system.cc;fp=lily%2Fpaper-system.cc;h=711d919446d4f8d21a3205563d6dde914aceb8b2;hb=941dff9d2a67080e0dd8474f1e70f0c72ace6424;hp=6653b6ddc7deb9e60582752206eda332470d27f2;hpb=5a22d6233a39d3164e1ca043244794c268be4ad0;p=lilypond.git

diff --git a/lily/paper-system.cc b/lily/paper-system.cc
index 6653b6ddc7..711d919446 100644
--- a/lily/paper-system.cc
+++ b/lily/paper-system.cc
@@ -1,9 +1,20 @@
 /*
-  paper-system.cc -- implement Prob functions for paper-system
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 2004--2011 Jan Nieuwenhuizen <janneke@gnu.org>
 
-  (c) 2004--2009 Jan Nieuwenhuizen <janneke@gnu.org>
+  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 "paper-system.hh"
@@ -16,6 +27,64 @@ make_paper_system (SCM immutable_init)
   return prob;
 }
 
+/*
+  TODO
+  it might be interesting to split off the footnotes as well, ie.
+  
+  get_footnotes(SCM expr, SCM* footnotes, SCM* cleaned) 
+    
+  by doing it this way and overwriting the old expr in the caller,
+  you can make sure nobody tries to handle footnotes differently
+  downstream.
+*/
+SCM
+get_footnotes (SCM expr)
+{
+  if (!scm_is_pair (expr))
+    return SCM_EOL;
+
+  SCM head = scm_car (expr);
+
+  if (head == ly_symbol2scm ("delay-stencil-evaluation"))
+    {
+      // we likely need to do something here...just don't know what...
+      return SCM_EOL;
+    }
+  
+  if (head == ly_symbol2scm ("combine-stencil"))
+    {
+      SCM out = SCM_EOL;
+      SCM *tail = &out;
+
+      for (SCM x = scm_cdr (expr); scm_is_pair (x); x = scm_cdr (x))
+        {
+          SCM footnote = get_footnotes (scm_car (x));
+          if (scm_is_pair (footnote))
+            {
+              for (SCM y = footnote; scm_is_pair (y); y = scm_cdr (y))
+                {
+                  *tail = scm_cons (scm_car (y), SCM_EOL);
+                  tail = SCM_CDRLOC (*tail);
+                }
+            }
+          else if (SCM_EOL != footnote)
+            {
+              *tail = scm_cons (footnote, SCM_EOL);
+              tail = SCM_CDRLOC (*tail);
+            }
+        }
+      return out;
+    }
+  if (head == ly_symbol2scm ("translate-stencil"))
+    return get_footnotes (scm_caddr (expr));
+
+  if (head == ly_symbol2scm ("footnote"))
+    return scm_cadr (expr);
+
+  return SCM_EOL;
+}
+
+
 void
 paper_system_set_stencil (Prob *prob, Stencil s)
 {