@Override
public IDanmakus sub(long startTime, long endTime) {
if (mSortType == ST_BY_LIST || items == null || items.size() == 0) {
return null;
}
if (subItems == null) {
subItems = new Danmakus(mDuplicateMergingEnabled);
}
if (startItem == null) {
startItem = createItem("start");
}
if (endItem == null) {
endItem = createItem("end");
}
if (subItems != null) {
long dtime = startTime - startItem.time;
if (dtime >= 0 && endTime <= endItem.time) {
return subItems;
}
}
startItem.time = startTime;
endItem.time = endTime;
subItems.setItems(((SortedSet<BaseDanmaku>) items).subSet(startItem, endItem));
return subItems;
}
public Danmakus(Collection<BaseDanmaku> items) {
setItems(items);
}