func encEle(n tree.Elem, e *xml.Encoder) error {
ele := xml.StartElement{
Name: n.GetToken().(xml.StartElement).Name,
}
attrs := n.GetAttrs()
ele.Attr = make([]xml.Attr, len(attrs))
for i := range attrs {
ele.Attr[i] = attrs[i].GetToken().(xml.Attr)
}
err := e.EncodeToken(ele)
if err != nil {
return err
}
if x, ok := n.(tree.Elem); ok {
for _, i := range x.GetChildren() {
err := encTok(i, e)
if err != nil {
return err
}
}
}
return e.EncodeToken(ele.End())
}
func lang(c tree.Ctx, args ...tree.Result) (tree.Result, error) {
lStr := args[0].String()
var n tree.Elem
for _, i := range c.NodeSet {
if i.GetNodeType() == tree.NtElem {
n = i.(tree.Elem)
} else {
n = i.GetParent()
}
for n.GetNodeType() != tree.NtRoot {
if attr, ok := tree.GetAttribute(n, "lang", tree.XMLSpace); ok {
return checkLang(lStr, attr.Value), nil
}
n = n.GetParent()
}
}
return tree.Bool(false), nil
}