/**
* Retrieves the children available at the client within the given range.
*
* @param itemOnly whether to return only {@link Listitem} and derives.
* @since 5.0.10
*/
protected Set<? extends Component> getAvailableAtClient(int offset, int limit, boolean itemOnly) {
if (!isCropper()) return null;
final Set<Component> avail = new LinkedHashSet<Component>(32);
if (!itemOnly) {
avail.addAll(_listbox.getHeads());
final Listfoot listfoot = _listbox.getListfoot();
if (listfoot != null) avail.add(listfoot);
final Paging paging = _listbox.getPagingChild();
if (paging != null) avail.add(paging);
final Frozen frozen = _listbox.getFrozen();
if (frozen != null) avail.add(frozen);
}
int pgsz = limit;
int ofs = offset;
if (_listbox.getItemCount() > 0) {
Component item = _listbox.getItems().get(0);
while (item != null) {
if (pgsz == 0) break;
if (item.isVisible() && item instanceof Listitem) {
if (--ofs < 0) {
--pgsz;
avail.add(item);
}
}
if (item instanceof Listgroup) {
final Listgroup g = (Listgroup) item;
if (!g.isOpen()) {
for (int j = 0, len = g.getItemCount(); j < len; j++)
item = (Listitem) item.getNextSibling();
}
}
if (item != null) item = item.getNextSibling();
}
}
return avail;
}
