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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;
/**
* Utility methods to handle sheet XML tree.
*/
public class SheetUtil {
/**
* Empty the content of a cell value.
*
* <p>This includes the following:</p>
*
* <ul>
* <li>
* Remove all of the supported attributes.
* </li><li>
* Remove the first <i>text:p</i> {@code Node} for most of the cells.
* </li>
* </ul>
*
* @param cc The {@code ConverterCapabilities}.
* @param node The {@code Node}.
*/
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++;
}
}
}
}
}
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