// bug 392949), so prepare our own history page input which can contain
// multiple files to support showing more than one file in history.
// It's also necessary for a single file that is outside of the
// workspace (and as such is not an IResource).
HistoryPageInput historyPageInput = getHistoryPageInput(selection);
return new ShowInContext(historyPageInput, new StructuredSelection(elements));
}