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{{- $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 }}
|
