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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef INCLUDED_PDFI_TREEVISITORFACTORY_HXX
+#define INCLUDED_PDFI_TREEVISITORFACTORY_HXX
+
+#include "pdfihelper.hxx"
+#include <boost/shared_ptr.hpp>
+
+namespace pdfi
+{
+    struct ElementTreeVisitor;
+    struct EmitContext;
+    class PDFIProcessor;
+    class StyleContainer;
+
+    /** Tree manipulation factory
+
+        Creates visitor objects performing various operations on the
+        pdf parse tree
+     */
+    struct TreeVisitorFactory
+    {
+        virtual ~TreeVisitorFactory() {}
+
+        /// Create visitor that combines tree nodes
+        virtual boost::shared_ptr<ElementTreeVisitor> createOptimizingVisitor(PDFIProcessor&) const = 0;
+        /// Create visitor that prepares style info
+        virtual boost::shared_ptr<ElementTreeVisitor> createStyleCollectingVisitor(
+            StyleContainer&, PDFIProcessor&) const = 0;
+        /// Create visitor that emits tree to an output target
+        virtual boost::shared_ptr<ElementTreeVisitor> createEmittingVisitor(EmitContext&, PDFIProcessor&) const = 0;
+    };
+
+    typedef boost::shared_ptr<TreeVisitorFactory> TreeVisitorFactorySharedPtr;
+
+    TreeVisitorFactorySharedPtr createWriterTreeVisitorFactory();
+    TreeVisitorFactorySharedPtr createImpressTreeVisitorFactory();
+    TreeVisitorFactorySharedPtr createDrawTreeVisitorFactory();
+}
+
+#endif
+