private void reveal() {
Caret caret = _viewer.getCaret();
if (caret != null && !caret.isDisposed() && _viewer.isInRangeMode()) {
org.eclipse.swt.graphics.Rectangle rect = caret.getBounds();
ExposeHelper helper = new ExposeHelper(_viewer);
helper.exposeArea(new Rectangle(rect.x, rect.y, rect.width,
rect.height));
}
}
}