Branch V7_3_new_exportation merged.

[helm.git] / helm / DEVEL / mathml_editor / src / CMathMLFactoryXSLT.cc

diff --git a/helm/DEVEL/mathml_editor/src/CMathMLFactoryXSLT.cc b/helm/DEVEL/mathml_editor/src/CMathMLFactoryXSLT.cc
index 2b714cb91f83d175f1757fb0c627a8f097d49c41..e5cac369f890060c31ef8ac4dcfab6cff30f3282 100644 (file)
--- a/helm/DEVEL/mathml_editor/src/CMathMLFactoryXSLT.cc
+++ b/helm/DEVEL/mathml_editor/src/CMathMLFactoryXSLT.cc
@@ -1,18 +1,37 @@
+/* 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"
 
 CMathMLFactoryXSLT::CMathMLFactoryXSLT(ALogger& l, const DOMX::XSLTStylesheet& s)
   : AMathMLFactory(l), style(s)
-{
-  reset();
-}
-
-void
-CMathMLFactoryXSLT::reset()
 {
   DOM::DOMImplementation di;
   DOM::DocumentType dt;
@@ -22,32 +41,40 @@ CMathMLFactoryXSLT::reset()
 void
 CMathMLFactoryXSLT::documentModified(TDocument& doc)
 {
-  if (TNode dirty = doc.dirtyNode()) 
-    {
-      std::vector< std::pair<DOM::GdomeString, DOM::GdomeString> > dirtyId;
-      if (result.get_documentElement().hasAttribute("xref"))
-       dirtyId.push_back(std::make_pair(DOM::GdomeString("id"),
-                                        DOM::GdomeString("'" + std::string(dirty["id"]) + "'")));
-      DOM::Document res = style.apply(doc.document(), dirtyId);
-      assert(res);
-      style.save(doc.document(), stdout);
-
-      DOM::Element root = res.get_documentElement();
-      assert(root);
-      assert(root.hasAttribute("xref"));
+  std::vector< std::pair<DOM::GdomeString, DOM::GdomeString> > dirtyId;
+  if (TNode dirty = doc.dirtyNode())
+    if (result.get_documentElement().hasAttribute("xref"))
+      dirtyId.push_back(std::make_pair(DOM::GdomeString("id"),
+                                      DOM::GdomeString("'" + std::string(dirty["id"]) + "'")));
+  DOM::Document res = style.apply(doc.document(), dirtyId);
+  assert(res);
+  style.save(doc.document(), stdout);
 
+  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);
-       }
+        {
+          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());
-       
-      style.save(result, stdout);
-
-      doc.clearDirty();
+        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");
     }
+
+  style.save(result, stdout);
 }
 
 bool