func (e ExclusiveCanonicalization) renderAttributes(node *etree.Element,
prefixesInScope []string, defaultNS string) (newDefaultNS string,
newPrefixesInScope []string) {
currentNS := node.SelectAttrValue("xmlns", defaultNS)
elementAttributes := []etree.Attr{}
nsListToRender := make(map[string]string)
attrListToRender := attributes{}
// load map with for prefix -> uri lookup
for _, attr := range node.Attr {
if attr.Space == "xmlns" {
e.namespaces[attr.Key] = attr.Value
}
}
// handle the namespace of the node itself
if node.Space != "" {
if !contains(prefixesInScope, node.Space) {
nsListToRender["xmlns:"+node.Space] = e.namespaces[node.Space]
prefixesInScope = append(prefixesInScope, node.Space)
}
} else if defaultNS != currentNS {
newDefaultNS = currentNS
elementAttributes = append(elementAttributes,
etree.Attr{Key: "xmlns", Value: currentNS})
}
for _, attr := range node.Attr {
// include the namespaces if they are in the inclusiveNamespacePrefixList
if attr.Space == "xmlns" {
if !contains(prefixesInScope, attr.Key) &&
contains(e.inclusiveNamespacePrefixList, attr.Key) {
nsListToRender["xmlns:"+attr.Key] = attr.Value
prefixesInScope = append(prefixesInScope, attr.Key)
}
}
// include namespaces for qualfied attributes
if attr.Space != "" &&
attr.Space != "xmlns" &&
!contains(prefixesInScope, attr.Space) {
nsListToRender["xmlns:"+attr.Space] = e.namespaces[attr.Space]
prefixesInScope = append(prefixesInScope, attr.Space)
}
// inclued all non-namespace attributes
if attr.Space != "xmlns" && attr.Key != "xmlns" {
attrListToRender = append(attrListToRender,
attribute{
prefix: attr.Space,
uri: e.namespaces[attr.Space],
key: attr.Key,
value: attr.Value,
})
}
}
// sort and add the namespace attributes first
sortedNSList := getSortedNamespaces(nsListToRender)
elementAttributes = append(elementAttributes, sortedNSList...)
// then sort and add the non-namespace attributes
sortedAttributes := getSortedAttributes(attrListToRender)
elementAttributes = append(elementAttributes, sortedAttributes...)
// replace the nodes attributes with the sorted copy
node.Attr = elementAttributes
return currentNS, prefixesInScope
}
