X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2FDEVEL%2Fmathml_editor%2Fsrc%2FCMathMLFactoryXSLT.cc;h=fddb24a580efcb18319ce53e124f6d0a6ec9bbcc;hb=1c7fb836e2af4f2f3d18afd0396701f2094265ff;hp=f1d357f298fb89dab90e986d06d508d0e6578383;hpb=30d3ef63a8ccaf73160e1c072ec1f5d05d0fd35a;p=helm.git

diff --git a/helm/DEVEL/mathml_editor/src/CMathMLFactoryXSLT.cc b/helm/DEVEL/mathml_editor/src/CMathMLFactoryXSLT.cc
index f1d357f29..fddb24a58 100644
--- a/helm/DEVEL/mathml_editor/src/CMathMLFactoryXSLT.cc
+++ b/helm/DEVEL/mathml_editor/src/CMathMLFactoryXSLT.cc
@@ -1,9 +1,35 @@
+/* This file is part of EdiTeX, an editor of mathematical
+ * expressions based on TeX syntax.
+ * 
+ * Copyright (C) 2002-2003 Luca Padovani <lpadovan@cs.unibo.it>,
+ *                    2003 Paolo Marinelli <pmarinel@cs.unibo.it>.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * For more information, please visit the project's home page
+ * http://helm.cs.unibo.it/editex/
+ * or send an email to <lpadovan@cs.unibo.it>
+ */
 
 #include "dom.hh"
 #include "TNode.hh"
+#include "ALogger.hh"
 #include "TDocument.hh"
 #include "CMathMLFactoryXSLT.hh"
 #include "AMathMLConsumer.hh"
+#include <cassert>
 
 CMathMLFactoryXSLT::CMathMLFactoryXSLT(ALogger& l, const DOMX::XSLTStylesheet& s)
   : AMathMLFactory(l), style(s)
@@ -25,20 +51,31 @@ CMathMLFactoryXSLT::documentModified(TDocument& doc)
   assert(res);
   style.save(doc.document(), stdout);
 
-  DOM::Element root = res.get_documentElement();
-  assert(root);
-
-  if (result.get_documentElement().hasAttribute("xref"))
-    {
-      bool ok = subst(result.get_documentElement(), root.getAttribute("xref"), result.importNode(root, true));
-      assert(ok);
+  if (DOM::Element root = res.get_documentElement())
+	  {
+      if (result.get_documentElement().hasAttribute("xref"))
+        {
+          bool ok = subst(result.get_documentElement(), root.getAttribute("xref"), result.importNode(root, true));
+          assert(ok);
+          doc.clearDirty();
+        }
+      else
+        result.replaceChild(result.importNode(root, true), result.get_documentElement());
+	  }
+	else
+		{
+			// Something wrong happened while applying the stylesheet.
+			DOM::Element root = result.get_documentElement();
+			DOM::Node p = root.get_firstChild();
+			while (p) {
+				DOM::Node next = p.get_nextSibling();
+				root.removeChild(p);
+				p = next;
+			}
+      logger.error("The stylesheet produced an empty document");
     }
-  else
-    result.replaceChild(result.importNode(root, true), result.get_documentElement());
 
   style.save(result, stdout);
-
-  doc.clearDirty();
 }
 
 bool