def Node_insertBefore(node, tmp, oldNode):
# Work around libxml2 tendency to merge text nodes and free nodes silently.
if libxml2mod.type(tmp) == "text":
placeholder = libxml2mod.xmlNewNode("tmp")
placeholder = libxml2mod.xmlAddPrevSibling(oldNode, placeholder)
libxml2mod.xmlReplaceNode(placeholder, tmp)
return tmp
else:
return libxml2mod.xmlAddPrevSibling(oldNode, tmp)