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diff --git a/libjava/classpath/javax/swing/text/PlainDocument.java b/libjava/classpath/javax/swing/text/PlainDocument.java
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+++ b/libjava/classpath/javax/swing/text/PlainDocument.java
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+/* PlainDocument.java --
+   Copyright (C) 2002, 2004  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.swing.text;
+
+import java.util.ArrayList;
+
+public class PlainDocument extends AbstractDocument
+{
+  private static final long serialVersionUID = 4758290289196893664L;
+    
+  public static final String lineLimitAttribute = "lineLimit";
+  public static final String tabSizeAttribute = "tabSize";
+
+  private BranchElement rootElement;
+  private int tabSize;
+  
+  public PlainDocument()
+  {
+    this(new GapContent());
+  }
+
+  public PlainDocument(AbstractDocument.Content content)
+  {
+    super(content);
+    tabSize = 8;
+    rootElement = (BranchElement) createDefaultRoot();
+  }
+
+  private void reindex()
+  {
+    Element[] lines;
+    try 
+      {
+        String str = content.getString(0, content.length());
+
+        ArrayList elts = new ArrayList();
+        int j = 0;
+        for (int i = str.indexOf('\n', 0); i != -1; i = str.indexOf('\n', i + 1))
+          {
+            elts.add(createLeafElement(rootElement, SimpleAttributeSet.EMPTY, j, i + 1));
+            j = i + 1;
+          }
+        
+        if (j < content.length())
+          elts.add(createLeafElement(rootElement, SimpleAttributeSet.EMPTY, j, content.length()));
+        
+        lines = new Element[elts.size()];
+        for (int i = 0; i < elts.size(); ++i)
+          lines[i] = (Element) elts.get(i);
+      }
+    catch (BadLocationException e)
+      {
+        lines = new Element[1];
+        lines[0] = createLeafElement(rootElement, SimpleAttributeSet.EMPTY, 0, 1);
+      }
+
+    ((BranchElement) rootElement).replace(0, rootElement.getElementCount(), lines);
+  }
+
+  protected AbstractDocument.AbstractElement createDefaultRoot()
+  {
+    BranchElement root =
+      (BranchElement) createBranchElement(null, SimpleAttributeSet.EMPTY);
+
+    Element[] array = new Element[1];
+    array[0] = createLeafElement(root, SimpleAttributeSet.EMPTY, 0, 1);
+    root.replace(0, 0, array);
+    
+    return root;
+  }
+
+  protected void insertUpdate(DefaultDocumentEvent event, AttributeSet attributes)
+  {
+    reindex();
+
+    super.insertUpdate(event, attributes);
+  }
+
+  protected void removeUpdate(DefaultDocumentEvent event)
+  {
+    super.removeUpdate(event);
+
+    int p0 = event.getOffset();
+    int len = event.getLength();
+    int p1 = len + p0;
+
+    // check if we must collapse some elements
+    int i1 = rootElement.getElementIndex(p0);
+    int i2 = rootElement.getElementIndex(p1);
+    if (i1 != i2)
+      {
+        Element el1 = rootElement.getElement(i1);
+        Element el2 = rootElement.getElement(i2);
+        int start = el1.getStartOffset();
+        int end = el2.getEndOffset();
+        // collapse elements if the removal spans more than 1 line
+        Element newEl = createLeafElement(rootElement,
+                                          SimpleAttributeSet.EMPTY,
+                                          start, end - len);
+        rootElement.replace(i1, i2 - i1, new Element[]{ newEl });
+      }
+    else
+      {
+        // otherwise only adjust indices of the element
+        LeafElement el1 = (LeafElement) rootElement.getElement(i1);
+        el1.end -= len;
+      }
+
+    // reindex remaining elements
+    for (int i = rootElement.getElementIndex(p0) + 1;
+         i < rootElement.getElementCount(); i++)
+      {
+        LeafElement el = (LeafElement) rootElement.getElement(i);
+        el.start -= len;
+        el.end -= len;
+      }
+      
+  }
+
+  public Element getDefaultRootElement()
+  {
+    return rootElement;
+  }
+
+  public Element getParagraphElement(int pos)
+  {
+    Element root = getDefaultRootElement();
+    return root.getElement(root.getElementIndex(pos));
+  }
+}