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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 SVX_TREE_VISITOR_HXX
+#define SVX_TREE_VISITOR_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 // SVX_TREE_VISITOR_HXX