Doc-es: various updates.

[lilypond.git] / lily / paper-system.cc

diff --git a/lily/paper-system.cc b/lily/paper-system.cc
index d5e8b914bac08c0ec240bca7b34646fd24adac54..b67eb0123b1154dadc5ab2e7a6c92ea81a8d7758 100644 (file)
--- a/lily/paper-system.cc
+++ b/lily/paper-system.cc
@@ -1,41 +1,94 @@
 /*
-  paper-system.cc -- implement Paper_system
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 2004--2015 Jan Nieuwenhuizen <janneke@gnu.org>
 
-  (c) 2004--2006 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"
+#include "international.hh"
 #include "item.hh"
 
-Paper_system::Paper_system (Stencil s, SCM immutable_init)
-  : Prob (immutable_init)
+Prob *
+make_paper_system (SCM immutable_init)
 {
-  SCM yext = get_property ("Y-extent");
+  Prob *prob = new Prob (ly_symbol2scm ("paper-system"), immutable_init);
+  return prob;
+}
 
-  if (is_number_pair (yext))
+/*
+  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 (scm_is_eq (head, ly_symbol2scm ("delay-stencil-evaluation")))
     {
-      
-      Box b = s.extent_box();
-      b[Y_AXIS] = ly_scm2interval (yext);
+      // we likely need to do something here...just don't know what...
+      return SCM_EOL;
+    }
 
-      s = Stencil (b, s.expr ());
+  if (scm_is_eq (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_null (footnote))
+            {
+              *tail = scm_cons (footnote, SCM_EOL);
+              tail = SCM_CDRLOC (*tail);
+            }
+        }
+      return scm_append (out);
     }
+  if (scm_is_eq (head, ly_symbol2scm ("translate-stencil")))
+    return get_footnotes (scm_caddr (expr));
 
-  set_property ("stencil", s.smobbed_copy ());
-}
+  if (scm_is_eq (head, ly_symbol2scm ("footnote")))
+    return scm_list_1 (scm_cdr (expr));
 
-Paper_system *
-unsmob_paper_system (SCM x)
-{
-  Prob *prob = unsmob_prob (x);
-  return dynamic_cast<Paper_system*> (prob);
+  return SCM_EOL;
 }
 
-LY_DEFINE(ly_paper_system_p, "ly:paper-system?",
-         1,0,0, (SCM obj),
-         "Type predicate.")
+void
+paper_system_set_stencil (Prob *prob, Stencil s)
 {
-  return scm_from_bool (unsmob_paper_system (obj));
+  SCM yext = prob->get_property ("Y-extent");
+
+  if (is_number_pair (yext))
+    {
+      Box b = s.extent_box ();
+      b[Y_AXIS] = ly_scm2interval (yext);
+
+      s = Stencil (b, s.expr ());
+    }
+
+  prob->set_property ("stencil", s.smobbed_copy ());
 }