{{- $headers := findRE "<h[1-6].*?>(.|\n])+?</h[1-6]>" .Content -}} {{- $has_headers := ge (len $headers) 1 -}} {{- if $has_headers -}} <div class="toc"> <details {{if (.Param "TocOpen") }} open{{ end }}> <summary accesskey="c" title="(Alt + C)"> <span class="details">{{- i18n "toc" | default "Table of Contents" }}</span> </summary> <div class="inner"> {{- if (.Param "UseHugoToc") }} {{- .TableOfContents -}} {{- else }} {{- $largest := 6 -}} {{- range $headers -}} {{- $headerLevel := index (findRE "[1-6]" . 1) 0 -}} {{- $headerLevel := len (seq $headerLevel) -}} {{- if lt $headerLevel $largest -}} {{- $largest = $headerLevel -}} {{- end -}} {{- end -}} {{- $firstHeaderLevel := len (seq (index (findRE "[1-6]" (index $headers 0) 1) 0)) -}} {{- $.Scratch.Set "bareul" slice -}} <ul> {{- range seq (sub $firstHeaderLevel $largest) -}} <ul> {{- $.Scratch.Add "bareul" (sub (add $largest .) 1) -}} {{- end -}} {{- range $i, $header := $headers -}} {{- $headerLevel := index (findRE "[1-6]" . 1) 0 -}} {{- $headerLevel := len (seq $headerLevel) -}} {{/* get id="xyz" */}} {{- $id := index (findRE "(id=\"(.*?)\")" $header 9) 0 }} {{- /* strip id="" to leave xyz, no way to get regex capturing groups in hugo */ -}} {{- $cleanedID := replace (replace $id "id=\"" "") "\"" "" }} {{- $header := replaceRE "<h[1-6].*?>((.|\n])+?)</h[1-6]>" "$1" $header -}} {{- if ne $i 0 -}} {{- $prevHeaderLevel := index (findRE "[1-6]" (index $headers (sub $i 1)) 1) 0 -}} {{- $prevHeaderLevel := len (seq $prevHeaderLevel) -}} {{- if gt $headerLevel $prevHeaderLevel -}} {{- range seq $prevHeaderLevel (sub $headerLevel 1) -}} <ul> {{/* the first should not be recorded */}} {{- if ne $prevHeaderLevel . -}} {{- $.Scratch.Add "bareul" . -}} {{- end -}} {{- end -}} {{- else -}} </li> {{- if lt $headerLevel $prevHeaderLevel -}} {{- range seq (sub $prevHeaderLevel 1) -1 $headerLevel -}} {{- if in ($.Scratch.Get "bareul") . -}} </ul> {{/* manually do pop item */}} {{- $tmp := $.Scratch.Get "bareul" -}} {{- $.Scratch.Delete "bareul" -}} {{- $.Scratch.Set "bareul" slice}} {{- range seq (sub (len $tmp) 1) -}} {{- $.Scratch.Add "bareul" (index $tmp (sub . 1)) -}} {{- end -}} {{- else -}} </ul> </li> {{- end -}} {{- end -}} {{- end -}} {{- end }} <li> <a href="#{{- $cleanedID -}}" aria-label="{{- $header | plainify -}}">{{- $header | safeHTML -}}</a> {{- else }} <li> <a href="#{{- $cleanedID -}}" aria-label="{{- $header | plainify -}}">{{- $header | safeHTML -}}</a> {{- end -}} {{- end -}} <!-- {{- $firstHeaderLevel := len (seq (index (findRE "[1-6]" (index $headers 0) 1) 0)) -}} --> {{- $firstHeaderLevel := $largest }} {{- $lastHeaderLevel := len (seq (index (findRE "[1-6]" (index $headers (sub (len $headers) 1)) 1) 0)) }} </li> {{- range seq (sub $lastHeaderLevel $firstHeaderLevel) -}} {{- if in ($.Scratch.Get "bareul") (add . $firstHeaderLevel) }} </ul> {{- else }} </ul> </li> {{- end -}} {{- end }} </ul> {{- end }} </div> </details> </div> {{- end }}