public String[] knownNamespaces() {
final PsiElement parentElement = getParent();
BidirectionalMap<String, String> map = initNamespaceMaps(parentElement);
Set<String> known = Collections.emptySet();
if (map != null) {
known = new HashSet<String>(map.values());
}
if (parentElement instanceof XmlTag) {
if (known.isEmpty()) return ((XmlTag) parentElement).knownNamespaces();
ContainerUtil.addAll(known, ((XmlTag) parentElement).knownNamespaces());
} else {
XmlExtension xmlExtension = XmlExtension.getExtensionByElement(this);
if (xmlExtension != null) {
final XmlFile xmlFile = xmlExtension.getContainingFile(this);
if (xmlFile != null) {
final XmlTag rootTag = xmlFile.getRootTag();
if (rootTag != null && rootTag != this) {
if (known.isEmpty()) return rootTag.knownNamespaces();
ContainerUtil.addAll(known, rootTag.knownNamespaces());
}
}
}
}
return ArrayUtil.toStringArray(known);
}
@NotNull
@Override
public LookupElement[] getVariants() {
final PsiElement element = getElement();
if (!myStartTagFlag) {
return super.getVariants();
}
final XmlTag xmlTag = (XmlTag) element;
final List<XmlElementDescriptor> variants =
TagNameReference.<XmlElementDescriptor>getTagNameVariants(
xmlTag, Arrays.asList(xmlTag.knownNamespaces()), new ArrayList<String>(), Function.ID);
final List<LookupElement> elements = new ArrayList<LookupElement>(variants.size());
for (XmlElementDescriptor descriptor : variants) {
final String descriptorName = descriptor.getName(element);
if (descriptorName != null) {
LookupElementBuilder lookupElement =
LookupElementBuilder.create(descriptor, descriptorName);
elements.add(lookupElement.withInsertHandler(JavaFxTagInsertHandler.INSTANCE));
}
}
return elements.toArray(new LookupElement[elements.size()]);
}