net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/wizards/html/TableElementCellModifier.java

   1 /*
   2  * $Id: TableElementCellModifier.java,v 1.3 2006-10-21 23:18:43 pombredanne Exp $
   3  * Copyright Narushima Hironori. All rights reserved.
   4  */
   5 package net.sourceforge.phpeclipse.wizards.html;
   6
   7 import javax.xml.parsers.DocumentBuilderFactory;
   8
   9 import org.eclipse.jface.util.IPropertyChangeListener;
  10 import org.eclipse.jface.util.PropertyChangeEvent;
  11 import org.eclipse.jface.viewers.ICellModifier;
  12 import org.eclipse.swt.widgets.Item;
  13 import org.w3c.dom.Document;
  14 import org.w3c.dom.Element;
  15 import org.w3c.dom.Node;
  16 import org.w3c.dom.NodeList;
  17 import org.w3c.dom.Text;
  18
  19 /**
  20  *
  21  */
  22 public class TableElementCellModifier implements ICellModifier {
  23
  24         DocumentBuilderFactory builderFactory;
  25
  26         IPropertyChangeListener listener;
  27
  28         public TableElementCellModifier(IPropertyChangeListener listener) {
  29                 builderFactory = DocumentBuilderFactory.newInstance();
  30                 this.listener = listener;
  31         }
  32
  33         public boolean canModify(Object element, String property) {
  34                 return getValue(element, property) != null;
  35         }
  36
  37         public Object getValue(Object trElem, String property) {
  38                 if (trElem instanceof Element) {
  39                         Element e = (Element) trElem;
  40                         if (e.getNodeName().equals("tr")) {
  41                                 int v = TableElementModel.toNumeric(property);
  42                                 Element[] cells = TableElementModel.chooseCellElements(e);
  43                                 if (v >= 0 && v < cells.length) {
  44                                         NodeList nodes = cells[v].getChildNodes();
  45                                         if (nodes.getLength() == 1) {
  46                                                 Node n = nodes.item(0);
  47                                                 if (n instanceof Text) {
  48                                                         return n.getNodeValue();
  49                                                 }
  50                                         }
  51                                 }
  52                         }
  53                 }
  54                 return null;
  55         }
  56
  57         public void modify(Object element, String property, Object value) {
  58                 if (element instanceof Item) {
  59                         element = ((Item) element).getData();
  60                 }
  61                 Element trElem = (Element) element;
  62                 int index = TableElementModel.toNumeric(property);
  63                 Element cellElem = TableElementModel.chooseCellElements(trElem)[index];
  64
  65                 NodeList nodes = cellElem.getChildNodes();
  66                 for (int i = 0; i < nodes.getLength(); i++) {
  67                         cellElem.removeChild(nodes.item(i));
  68                 }
  69                 Document doc = cellElem.getOwnerDocument();
  70
  71                 if (value instanceof String) {
  72                         cellElem.appendChild(doc.createTextNode((String) value));
  73                 }
  74                 // notify listener
  75                 if (listener != null) {
  76                         String oldValue = nodes.item(0).getNodeValue();
  77                         listener.propertyChange(new PropertyChangeEvent(this, property,
  78                                         (String) value, oldValue));
  79                 }
  80         }
  81
  82 }