/** Returns the the next significant edit to be undone if undo is called. May return null */
protected UndoableEdit editToBeUndone() {
int i = indexOfNextAdd;
while (i > 0) {
UndoableEdit edit = (UndoableEdit) edits.elementAt(--i);
if (edit.isSignificant()) {
return edit;
}
}
return null;
}
/** Returns the the next significant edit to be redone if redo is called. May return null */
protected UndoableEdit editToBeRedone() {
int count = edits.size();
int i = indexOfNextAdd;
while (i < count) {
UndoableEdit edit = (UndoableEdit) edits.elementAt(i++);
if (edit.isSignificant()) {
return edit;
}
}
return null;
}