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carlos.lucasius@canada 1998-04-08:
Bug from Corel (licensee) for JFC1.1 using JDK1.1.4 on WINNT4.0.
Corel: "Very critical bug for our product - requires immediate attention."

There seems to be a bug with applying paragraph attributes to an empty
paragraph. Using the accompanying test program, try the following:

    1. Type some text and press <enter>
    2. Click the 'change attributes' button. You'll notice that the
caret changes size to match the change in paragraph style.
    3. Type more text. The paragraph attributes have changed back to
what they were on the previous line.


import java.awt.*;
import java.awt.event.*;
import com.sun.java.swing.*;
import com.sun.java.swing.text.*;
import com.sun.java.swing.text.html.*;

public class bug
{
 public static void main(String[] args)
 {
  JFrame f = new JFrame();
  JTextPane pane = new JTextPane();
  pane.setEditorKit(new HTMLEditorKit());

  f.getContentPane().setLayout(new BorderLayout());
  f.getContentPane().add(pane, "Center");
  JButton button = new JButton("change attributes");
  StyleChanger sc;
  button.addActionListener(sc = new StyleChanger(pane));
  sc.actionPerformed(null);
  f.getContentPane().add(button, "South");
  f.setSize(500, 600);
  f.show();
 }
}


class StyleChanger implements ActionListener
{
 private JTextPane pane;
 private int counter=0;

 public StyleChanger(JTextPane p)
 {
  pane=p;
 }

 public void actionPerformed(ActionEvent e)
 {
  SimpleAttributeSet attr = new SimpleAttributeSet();

  switch(counter)
  {
   case 0:
    StyleConstants.setAlignment(attr, StyleConstants.ALIGN_LEFT);
    pane.setLogicalStyle(pane.getStyle(StyleContext.DEFAULT_STYLE));
    break;
   case 1:
    StyleConstants.setAlignment(attr, StyleConstants.ALIGN_CENTER);
    pane.setLogicalStyle(pane.getStyle("h1"));
    break;
   case 2:
    StyleConstants.setAlignment(attr, StyleConstants.ALIGN_RIGHT);
    pane.setLogicalStyle(pane.getStyle("h5"));
    break;
  }

  counter = (counter+1)%3;
  pane.setParagraphAttributes(attr, false);
  pane.requestFocus();
 }
}