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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_SVX_SOURCE_INC_TREEVISITOR_HXX
+#define INCLUDED_SVX_SOURCE_INC_TREEVISITOR_HXX
+
+#include <stack>
+
+template< class ELEMENT, class NODEINFO, class PROCESSOR >
+class TreeVisitor
+{
+public:
+ TreeVisitor( NODEINFO _nodeInfo )
+ :m_visitedRoot( false )
+ ,m_root()
+ ,m_current()
+ ,m_nodeInfo( _nodeInfo )
+ {
+ }
+
+ void process( const ELEMENT& _root, PROCESSOR& _processor )
+ {
+ m_root = _root;
+ m_visitedRoot = false;
+
+ while ( do_step() )
+ _processor.process( m_current );
+ }
+
+private:
+ bool do_step();
+
+private:
+ bool m_visitedRoot;
+ ELEMENT m_root;
+ ELEMENT m_current;
+ const NODEINFO m_nodeInfo;
+
+ ::std::stack< size_t > m_pathToCurrent;
+ ::std::stack< ELEMENT > m_currentAncestors;
+};
+
+template< class ELEMENT, class NODEINFO, class PROCESSOR >
+bool TreeVisitor< ELEMENT, NODEINFO, PROCESSOR >::do_step()
+{
+ if ( !m_visitedRoot )
+ {
+ m_current = m_root;
+ m_visitedRoot = true;
+ return true;
+ }
+
+ // can we step down from the current node?
+ size_t childCount = m_nodeInfo.childCount( m_current );
+ if ( childCount )
+ {
+ m_currentAncestors.push( m_current );
+ m_current = m_nodeInfo.getChild( m_current, 0 );
+ m_pathToCurrent.push( 0 );
+ return true;
+ }
+
+ // is there a right sibling of the current node?
+ while ( !m_pathToCurrent.empty() )
+ {
+ const ELEMENT& currentParent = m_currentAncestors.top();
+ childCount = m_nodeInfo.childCount( currentParent );
+
+ size_t currentChildPos = m_pathToCurrent.top();
+ if ( ++currentChildPos < childCount )
+ {
+ // yes there is
+ m_pathToCurrent.top() = currentChildPos;
+ m_current = m_nodeInfo.getChild( currentParent, currentChildPos );
+ return true;
+ }
+
+ // no there isn't => step up
+ m_currentAncestors.pop();
+ m_pathToCurrent.pop();
+ }
+
+ return false;
+}
+
+#endif // INCLUDED_SVX_SOURCE_INC_TREEVISITOR_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */