ColumnStyle.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.converter.xml.sxc;
 
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Element;
 
import org.openoffice.xmerge.converter.xml.Style;
import org.openoffice.xmerge.converter.xml.StyleCatalog;
import org.openoffice.xmerge.util.Debug;
import org.openoffice.xmerge.util.TwipsConverter;
 
public class ColumnStyle extends Style implements Cloneable {
 
    private int colWidth = 0;
    public ColumnStyle(Node node, StyleCatalog sc) {
        super(node, sc);
 
        // Run through the attributes of this node, saving
        // the ones we're interested in.
        NamedNodeMap attrNodes = node.getAttributes();
        if (attrNodes != null) {
            int len = attrNodes.getLength();
            for (int i = 0; i < len; i++) {
                Node attr = attrNodes.item(i);
                handleAttribute(attr.getNodeName(), attr.getNodeValue());
            }
        }
 
        // Look for children.  Only ones we care about are "style:properties"
        // nodes.  If any are found, recursively traverse them, passing
        // along the style element to add properties to.
        if (node.hasChildNodes()) {
            NodeList children = node.getChildNodes();
            int len = children.getLength();
            for (int i = 0; i < len; i++) {
                Node child = children.item(i);
                String nodeName = child.getNodeName();
                if (nodeName.equals("style:properties")) {
                    NamedNodeMap childAttrNodes = child.getAttributes();
                    if (childAttrNodes != null) {
                        int nChildAttrNodes = childAttrNodes.getLength();
                        for (int j = 0; j < nChildAttrNodes; j++) {
                            Node attr = childAttrNodes.item(j);
                            handleAttribute(attr.getNodeName(),
                            attr.getNodeValue());
                        }
                    }
                }
            }
        }
    }
 
    public ColumnStyle(String name, String family, String parent, int colWidth, StyleCatalog sc) {
        super(name, family, parent, sc);
        this.colWidth = colWidth;
    }
 
    public int getColWidth() {
        return colWidth;
    }
 
    private void setColWidth(int colWidth) {
 
        this.colWidth = colWidth;
    }
 
    private int parseColWidth(String value) {
        return TwipsConverter.convert2twips(value, 255);
    }
 
    private void handleAttribute(String attr, String value) {
 
        if (attr.equals("style:column-width")) {
            colWidth = parseColWidth(value);
        }
        else {
            Debug.log(Debug.INFO, "ColumnStyle Unhandled: " + attr + "=" + value);
        }
    }
 
    @Override
    public Style getResolved() {
        // Create a new object to return, which is a clone of this one.
        ColumnStyle resolved = null;
        try {
            resolved = (ColumnStyle)this.clone();
        } catch (Exception e) {
            Debug.log(Debug.ERROR, "Can't clone", e);
        }
 
        // Look up the parentStyle.  (If there is no style catalog
        // specified, we can't do any lookups.)
        ColumnStyle parentStyle = null;
        if (sc != null) {
            if (parent != null) {
                parentStyle = (ColumnStyle)sc.lookup(parent, family, null,
                           this.getClass());
                if (parentStyle == null)
                    Debug.log(Debug.ERROR, "parent style lookup of "
                      + parent + " failed!");
                else
                    parentStyle = (ColumnStyle)parentStyle.getResolved();
 
            } else if (!name.equals("DEFAULT_STYLE")) {
                parentStyle = (ColumnStyle)sc.lookup("DEFAULT_STYLE", null,
                    null, this.getClass());
            }
        }
 
        // If we found a parent, for any attributes which we don't have
        // set, try to get the values from the parent.
        if (parentStyle != null) {
            parentStyle = (ColumnStyle)parentStyle.getResolved();
 
            if ((colWidth == 0) && (parentStyle.getColWidth() != 0))
                resolved.setColWidth(parentStyle.getColWidth());
        }
        return resolved;
    }
 
    @Override
    public Node createNode(org.w3c.dom.Document parentDoc, String name) {
        Element node = parentDoc.createElement(name);
        writeAttributes(node);
        return node;
    }
 
    @Override
    public boolean isSubset(Style style) {
        if (style.getClass() != this.getClass())
                return false;
        ColumnStyle tStyle = (ColumnStyle)style;
 
        return colWidth == tStyle.getColWidth();
    }
 
    private void writeAttributes(Element node) {
 
        if(colWidth!=0) {
            String width = TwipsConverter.twips2cm(colWidth) + "cm";
            node.setAttribute("style:column-width", width);
        }
    }
}