SheetUtil.java

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/*
 * 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 .
 */
 
package org.openoffice.xmerge.merger.merge;
 
import org.w3c.dom.Node;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.w3c.dom.NamedNodeMap;
 
import org.openoffice.xmerge.ConverterCapabilities;
import org.openoffice.xmerge.converter.xml.OfficeConstants;
 
public class SheetUtil {
 
    public static void emptyCell(ConverterCapabilities cc, Node node) {
 
        NamedNodeMap attrNodes = node.getAttributes();
 
        if (attrNodes != null) {
 
            // empty the first text:p node.
            // Note: it's not necessary only string type cell contain text:p
            // basically, all different type of cell will contain one
            Element cell = (Element)node;
 
            // get the paragraph node list
            NodeList paraNodes =
                cell.getElementsByTagName(OfficeConstants.TAG_PARAGRAPH);
 
            Node firstParaNode = paraNodes.item(0);
 
            // remove the first paragraph element node
            if (firstParaNode != null) {
                Node parent = firstParaNode.getParentNode();
                parent.removeChild(firstParaNode);
            }
 
            // check all the attributes and remove those we supported in
            // converter
            // NOTE: for attribute list, refer to section 4.7.2 in specification
            int len = attrNodes.getLength();
 
            for (int i = 0; i < len; ) {
                Node attr = attrNodes.item(i);
 
                // when we hit the end of the attribute nodes, return
                // it may happen sooner as we keep on removing nodes
                if (attr == null) {
                    break;
                }
                // remove the supported attr except columns repeated attribute
                if (cc.canConvertAttribute(OfficeConstants.TAG_TABLE_CELL,
                                           attr.getNodeName()) &&
                    !attr.getNodeName().equals(
                        OfficeConstants.ATTRIBUTE_TABLE_NUM_COLUMNS_REPEATED)) {
 
                    attrNodes.removeNamedItem(attr.getNodeName());
                } else {
                    i++;
                }
            }
        }
    }
}