@NotNull
private static XmlFileHeader calcXmlFileHeader(final XmlFile file) {
if (file instanceof PsiFileEx
&& ((PsiFileEx) file).isContentsLoaded()
&& file.getNode().isParsed()) {
return computeHeaderByPsi(file);
}
if (!XmlUtil.isStubBuilding() && file.getFileType() == XmlFileType.INSTANCE) {
VirtualFile virtualFile = file.getVirtualFile();
if (virtualFile instanceof VirtualFileWithId) {
ObjectStubTree tree =
StubTreeLoader.getInstance().readFromVFile(file.getProject(), virtualFile);
if (tree != null) {
Stub root = tree.getRoot();
if (root instanceof FileStub) {
return ((FileStub) root).getHeader();
}
}
}
}
if (!file.isValid()) return XmlFileHeader.EMPTY;
return NanoXmlUtil.parseHeader(file);
}
@Override
@NotNull
public XmlFileHeader getXmlFileHeader(XmlFile file) {
return file.isValid()
? ourRootTagCache.get(ROOT_TAG_NS_KEY, file, null).getValue()
: XmlFileHeader.EMPTY;
}