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Description
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In the Stylepad example included in swing-1.0.1
if the user places the Caret in position 0
(the start of the document) and insert some text
and then moves the cuser back to position 0 and
tries to insert some more text a Exception is
thrown.
The error has been reproduced with jdk 1.1.5
and swing 1.0.1 under Windows 95 and
Swing-1.0.1 with JDK 1.1.5 on Windows NT 4 and
Swing-1.0.1 with JDK 1.1.5 on Unix
So its looks like its not a Platform dependant
problem.
----
I have also included some example code that will
reproduce the problem
import java.awt.BorderLayout;
import com.sun.java.swing.JTextPane;
import com.sun.java.swing.JPanel;
public class TestJTextPane extends JPanel
{
protected JTextPane editor = new JTextPane();
public TestJTextPane()
{
super();
setLayout(new BorderLayout());
add("Center", editor);
}
public void reproduceException()
{
try
{
editor.getDocument().insertString(0, "String1", null);
// uncomment this line to produce the Exception
//editor.getDocument().insertString(0, "String2", null);
} catch (com.sun.java.swing.text.BadLocationException e)
{}
}
static public void main(String[] args)
{
java.awt.Frame testFrame = new java.awt.Frame("Test for JTextPane");
TestJTextPane testEditorPane = new TestJTextPane();
testFrame.add("Center", testEditorPane);
testFrame.pack();
testFrame.setSize(700, 500);
testFrame.show();
testEditorPane.reproduceException();
}
}
Exception occurred during event dispatching:
com.sun.java.swing.text.StateInvariantError: infinite loop in formatting
at
com.sun.java.swing.text.ParagraphView.rebuildRows(ParagraphView.java:163)
at
com.sun.java.swing.text.ParagraphView.layout(ParagraphView.java:127)
at
com.sun.java.swing.text.ParagraphView.insertUpdate(ParagraphView.java:596)
at
com.sun.java.swing.text.BoxView.insertUpdate(BoxView.java:311)
at
com.sun.java.swing.text.DefaultTextUI$RootView.insertUpdate(DefaultTextUI.java:834)
at
com.sun.java.swing.text.DefaultTextUI$UpdateHandler.insertUpdate(DefaultTextUI.java:1050)
at
com.sun.java.swing.text.AbstractDocument.fireInsertUpdate(AbstractDocument.java:137)
at
com.sun.java.swing.text.AbstractDocument.insertString(AbstractDocument.java:415)
at
com.sun.java.swing.JTextPane.replaceSelection(JTextPane.java:148)
at
com.sun.java.swing.text.DefaultEditorKit$DefaultKeyTypedAction.actionPerformed(DefaultEditorKit.java:650)
at
com.sun.java.swing.text.JTextComponent.processComponentKeyEvent(JTextComponent.java:1026)
at
com.sun.java.swing.JComponent.processKeyEvent(JComponent.java:1256)
at java.awt.Component.processEvent(Component.java:2138)
at java.awt.Container.processEvent(Container.java:894)
at java.awt.Component.dispatchEventImpl(Component.java:1764)
at java.awt.Container.dispatchEventImpl(Container.java:939)
at java.awt.Component.dispatchEvent(Component.java:1704)
at
java.awt.LightweightDispatcher.processKeyEvent(Container.java:1416)
at
java.awt.LightweightDispatcher.dispatchEvent(Container.java:1402)
at java.awt.Container.dispatchEventImpl(Container.java:926)
at java.awt.Window.dispatchEventImpl(Window.java:443)
at java.awt.Component.dispatchEvent(Component.java:1704)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:63)
A intresting twist with this problem that might help you track it down
is that if more than one line of text is inserted into the JTextPane
it takes three inerts at possition 0 to cause the exception.
import java.awt.BorderLayout;
import com.sun.java.swing.JTextPane;
import com.sun.java.swing.JPanel;
public class TestJTextPane extends JPanel
{
protected JTextPane editor = new JTextPane();
public TestJTextPane()
{
super();
setLayout(new BorderLayout());
add("Center", editor);
}
public void reproduceException()
{
try
{
editor.getDocument().insertString(0, "String1" + '\n', null);
editor.getDocument().insertString(0, "String2", null);
// uncomment this line to produce the Exception
//editor.getDocument().insertString(0, "String3", null);
} catch (com.sun.java.swing.text.BadLocationException e)
{}
}
static public void main(String[] args)
{
java.awt.Frame testFrame = new java.awt.Frame("Test for JTextPane");
TestJTextPane testEditorPane = new TestJTextPane();
testFrame.add("Center", testEditorPane);
testFrame.pack();
testFrame.setSize(700, 500);
testFrame.show();
testEditorPane.reproduceException();
}
}
(Review ID: 28272)
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