READ_BOTTOM_TO_TOP
return READ_BOTTOM_TO_TOP;
case READ_BOTTOM_TO_TOP:
case READ_BOTTOM_TO_TOP:
} else if (direction == READ_BOTTOM_TO_TOP) {
case READ_BOTTOM_TO_TOP:
case READ_BOTTOM_TO_TOP:
case READ_BOTTOM_TO_TOP:
} else if (direction == READ_TOP_TO_BOTTOM || direction == READ_BOTTOM_TO_TOP) {