hugo-theme-relearn/layouts/partials/toc-id.html

{{- if eq .Kind "taxonomy" }}
<nav id="TableOfContents">
  <ul>
  {{- $lastCapital := "" }}
  {{- $terms := slice }}
  {{- range .Data.Terms }}
    {{- $terms = $terms | append (dict "Title" (default .Page.Data.Term .Page.Title) "Term" . )}}
  {{- end }}
  {{- range sort $terms ".Title" }}
    {{- $capital := substr .Title 0 1 | upper }}
    {{- $len := 0 }}
    {{- range .Term.Pages }}
      {{- $c:=""}}{{/* count pages of term */}}
      {{- if and .Title .RelPermalink (or (ne (.Scratch.Get "relearnIsHiddenStem") true) (ne .Site.Params.disableTagHiddenPages true) ) }}
        {{- $len = add $len 1 }}
      {{- end }}
    {{- end }}
    {{- if $len }}
      {{- if ne $lastCapital $capital }}
    <li><a href="#{{ $capital | plainify | anchorize }}">{{ $capital }}</a></li>
      {{- end }}
      {{- $lastCapital = $capital }}
    {{- end }}
  {{- end }}
  </ul>
</nav>
{{- else if eq .Kind "term" }}
  {{- $lastCapital := "" }}
  {{- $pages := slice }}
  {{- range .Pages }}
    {{- if and .Title .RelPermalink (or (ne (.Scratch.Get "relearnIsHiddenStem") true) (ne .Site.Params.disableTagHiddenPages true) ) }}
      {{- $pages = $pages | append (dict "Title" .Title "Page" . )}}
    {{- end }}
  {{- end }}
  {{- $toc_term := "" }}
  {{- range sort $pages ".Title" }}
    {{- $capital := substr .Title 0 1 | upper }}
    {{- if ne $lastCapital $capital }}
    {{- $toc_term = printf "%s    <li><a href=\"#%s\">%s</a></li>\n" $toc_term ($capital | plainify | anchorize) $capital }}
    {{- end }}
    {{- $lastCapital = $capital }}
  {{- end }}
  {{- $toc := trim (partial "toc.html" .) " \n\r\t" }}
  {{- if and (not $toc) $toc_term }}
    {{- $toc = printf "<nav id=\"TableOfContents\"></nav>" }}
  {{- end }}
  {{- if and $toc $toc_term }}
    {{- $toc = replaceRE "^(<nav id=\"TableOfContents\">)[\\s]*" "${1}\n  <ul>\n" $toc }}
    {{- $toc = replaceRE "^(<nav id=\"TableOfContents\">[\\s]*<ul>)[\\s]*<ul>[\\n\\r]*" "${1}\n" $toc }}
    {{- $toc = replaceRE "[\\s]*(</nav>)$" "\n  </ul>\n${1}" $toc }}
    {{- $toc = replaceRE "[ \\t]*</ul>[\\s]*(</ul>[\\s]*</nav>)$" "  ${1}" $toc }}
    {{- $toc = replaceRE "([ \\t]*</ul>[\\s]*</nav>)$" (printf "%s${1}" $toc_term) $toc }}
  {{- end }}
{{ $toc | safeHTML }}
{{- else }}
  {{- partial "toc.html" . }}
{{- end }}