environment.py 文件源码

def _resolve_citation(self, builder, fromdocname, node, contnode):
        docname, labelid = self.citations.get(node['reftarget'], ('', ''))
        if docname:
            try:
                newnode = make_refnode(builder, fromdocname,
                                       docname, labelid, contnode)
                return newnode
            except NoUri:
                # remove the ids we added in the CitationReferences
                # transform since they can't be transfered to
                # the contnode (if it's a Text node)
                if not isinstance(contnode, nodes.Element):
                    del node['ids'][:]
                raise
        elif 'ids' in node:
            # remove ids attribute that annotated at
            # transforms.CitationReference.apply.
            del node['ids'][:]