func (t *AbsURL) absUrlify(tr *htmltran.Transformer, selectors ...elattr) (err error) {
var baseURL, inURL *url.URL
if baseURL, err = url.Parse(t.BaseURL); err != nil {
return
}
replace := func(in string) string {
if inURL, err = url.Parse(in); err != nil {
return in + "?"
}
if fragmentOnly(inURL) {
return in
}
return baseURL.ResolveReference(inURL).String()
}
for _, el := range selectors {
if err = tr.Apply(htmltran.TransformAttrib(el.attr, replace), el.tag); err != nil {
return
}
}
return
}
func (n *NavActive) Apply(w io.Writer, r io.Reader) (err error) {
var tr *htmltran.Transformer
if n.Section == "" {
_, err = io.Copy(w, r)
return
}
if tr, err = htmltran.NewFromReader(r); err != nil {
return
}
if n.AttrName == "" {
n.AttrName = "hugo-nav"
}
err = tr.Apply(htmltran.ModifyAttrib("class", "active"), fmt.Sprintf("li[%s=%s]", n.AttrName, n.Section))
if err != nil {
return
}
return tr.Render(w)
}