public void insertUpdate(DocumentEvent evt) {
documentChanged(evt);
int offset = evt.getOffset();
int length = evt.getLength();
int newStart;
int newEnd;
if (selectionStart > offset || (selectionStart == selectionEnd && selectionStart == offset))
newStart = selectionStart + length;
else newStart = selectionStart;
if (selectionEnd >= offset) newEnd = selectionEnd + length;
else newEnd = selectionEnd;
select(newStart, newEnd);
}
public void removeUpdate(DocumentEvent evt) {
documentChanged(evt);
int offset = evt.getOffset();
int length = evt.getLength();
int newStart;
int newEnd;
if (selectionStart > offset) {
if (selectionStart > offset + length) newStart = selectionStart - length;
else newStart = offset;
} else newStart = selectionStart;
if (selectionEnd > offset) {
if (selectionEnd > offset + length) newEnd = selectionEnd - length;
else newEnd = offset;
} else newEnd = selectionEnd;
select(newStart, newEnd);
}