private void addEmptyItem(CollectionListModel<LookupElement> model) {
LookupItem<String> item =
new EmptyLookupItem(
myCalculating ? " " : LangBundle.message("completion.no.suggestions"), false);
myMatchers.put(item, new CamelHumpMatcher(""));
model.add(item);
updateLookupWidth(item);
requestResize();
}
private boolean updateList(boolean onExplicitAction, boolean reused) {
if (!ApplicationManager.getApplication().isUnitTestMode()) {
ApplicationManager.getApplication().assertIsDispatchThread();
}
checkValid();
CollectionListModel<LookupElement> listModel = getListModel();
Pair<List<LookupElement>, Integer> pair;
synchronized (myList) {
pair = myPresentableArranger.arrangeItems(this, onExplicitAction || reused);
}
List<LookupElement> items = pair.first;
Integer toSelect = pair.second;
if (toSelect == null || toSelect < 0 || items.size() > 0 && toSelect >= items.size()) {
LOG.error(
"Arranger "
+ myPresentableArranger
+ " returned invalid selection index="
+ toSelect
+ "; items="
+ items);
toSelect = 0;
}
myOffsets.checkMinPrefixLengthChanges(items, this);
List<LookupElement> oldModel = listModel.toList();
listModel.removeAll();
if (!items.isEmpty()) {
listModel.add(items);
} else {
addEmptyItem(listModel);
}
updateListHeight(listModel);
myList.setSelectedIndex(toSelect);
return !ContainerUtil.equalsIdentity(oldModel, items);
}