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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SDEXT_SOURCE_PDFIMPORT_INC_TREEVISITING_HXX
+#define INCLUDED_SDEXT_SOURCE_PDFIMPORT_INC_TREEVISITING_HXX
+
+#include <sal/config.h>
+#include <list>
+#include <memory>
+
+namespace pdfi
+{
+ struct HyperlinkElement;
+ struct TextElement;
+ struct ParagraphElement;
+ struct FrameElement;
+ struct PolyPolyElement;
+ struct ImageElement;
+ struct PageElement;
+ struct DocumentElement;
+ struct Element;
+
+ /** To be visited by all tree element types
+
+ Visitor interface from the "visitor pattern". Implementor gets
+ called with actual tree node instances.
+ */
+ struct ElementTreeVisitor
+ {
+ virtual void visit( HyperlinkElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) = 0;
+ virtual void visit( TextElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) = 0;
+ virtual void visit( ParagraphElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) = 0;
+ virtual void visit( FrameElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) = 0;
+ virtual void visit( PolyPolyElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) = 0;
+ virtual void visit( ImageElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) = 0;
+ virtual void visit( PageElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) = 0;
+ virtual void visit( DocumentElement&, const std::list< std::unique_ptr<Element> >::const_iterator& ) = 0;
+ virtual ~ElementTreeVisitor() {}
+ };
+ typedef std::shared_ptr<ElementTreeVisitor> ElementTreeVisitorSharedPtr;
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */