private void deactivate() {
SpellCheckerAgent.removeListener(visitor);
if (viewer != null) {
viewer.removeTextListener(this);
viewer = null;
}
if (control != null && !control.isDisposed()) {
control.removeListener(SWT.Modify, this);
control.removeListener(SWT.Paint, this);
control.removeListener(SWT.Dispose, this);
redraw(control.getDisplay());
control = null;
}
if (job != null) {
job.dispose();
job = null;
}
ranges.clear();
}
