94 lines
3.7 KiB
HTML
94 lines
3.7 KiB
HTML
{{- $headers := findRE "<h[1-4].*?>(.|\n])+?</h[1-4]>" .Content -}}
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{{- $has_headers := ge (len $headers) 1 -}}
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{{- if $has_headers -}}
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{{- $largest := 6 -}}
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{{- range $headers -}}
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{{- $headerLevel := index (findRE "[1-4]" . 1) 0 -}}
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{{- $headerLevel := len (seq $headerLevel) -}}
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{{- if lt $headerLevel $largest -}}
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{{- $largest = $headerLevel -}}
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{{- end -}}
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{{- end -}}
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{{- $firstHeaderLevel := len (seq (index (findRE "[1-4]" (index $headers 0) 1) 0)) -}}
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{{- $.Scratch.Set "bareul" slice -}}
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<details id="TableOfContents" class="px-4 mt-4 bg-gray-100 dark:bg-gray-700 rounded toc">
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<summary class="flex items-center font-bold py-2 px-4 cursor-pointer justify-between select-none text-black dark:text-white">
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<span>Table of contents</span>
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<svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-chevron-down" width="24" height="24" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round">
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<path stroke="none" d="M0 0h24v24H0z" fill="none"></path>
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<polyline points="6 9 12 15 18 9"></polyline>
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</svg>
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</summary>
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<ul class="mt-2 pb-4">
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{{- range seq (sub $firstHeaderLevel $largest) -}}
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<ul>
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{{- $.Scratch.Add "bareul" (sub (add $largest .) 1) -}}
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{{- end -}}
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{{- range $i, $header := $headers -}}
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{{- $headerLevel := index (findRE "[1-4]" . 1) 0 -}}
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{{- $headerLevel := len (seq $headerLevel) -}}
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{{/* get id="xyz" */}}
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{{ $id := index (findRE "(id=\"(.*?)\")" $header 9) 0 }}
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{{/* strip id="" to leave xyz (no way to get regex capturing groups in hugo :( */}}
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{{ $cleanedID := replace (replace $id "id=\"" "") "\"" "" }}
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{{- $header := replaceRE "<h[1-4].*?>((.|\n])+?)</h[1-4]>" "$1" $header -}}
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{{- if ne $i 0 -}}
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{{- $prevHeaderLevel := index (findRE "[1-4]" (index $headers (sub $i 1)) 1) 0 -}}
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{{- $prevHeaderLevel := len (seq $prevHeaderLevel) -}}
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{{- if gt $headerLevel $prevHeaderLevel -}}
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{{- range seq $prevHeaderLevel (sub $headerLevel 1) -}}
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<ul>
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{{/* the first should not be recorded */}}
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{{- if ne $prevHeaderLevel . -}}
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{{- $.Scratch.Add "bareul" . -}}
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{{- end -}}
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{{- end -}}
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{{- else -}}
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</li>
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{{- if lt $headerLevel $prevHeaderLevel -}}
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{{- range seq (sub $prevHeaderLevel 1) -1 $headerLevel -}}
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{{- if in ($.Scratch.Get "bareul") . -}}
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</ul>
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{{/* manually do pop item */}}
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{{- $tmp := $.Scratch.Get "bareul" -}}
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{{- $.Scratch.Delete "bareul" -}}
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{{- $.Scratch.Set "bareul" slice}}
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{{- range seq (sub (len $tmp) 1) -}}
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{{- $.Scratch.Add "bareul" (index $tmp (sub . 1)) -}}
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{{- end -}}
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{{- else -}}
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</ul>
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</li>
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{{- end -}}
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{{- end -}}
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{{- end -}}
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{{- end -}}
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<li>
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<a href="#{{- $cleanedID -}}">{{- $header | safeHTML -}}</a>
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{{- else -}}
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<li>
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<a href="#{{- $cleanedID -}}">{{- $header | safeHTML -}}</a>
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{{- end -}}
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{{- end -}}
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<!-- {{- $firstHeaderLevel := len (seq (index (findRE "[1-4]" (index $headers 0) 1) 0)) -}} -->
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{{ $firstHeaderLevel := $largest }}
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{{- $lastHeaderLevel := len (seq (index (findRE "[1-4]" (index $headers (sub (len $headers) 1)) 1) 0)) -}}
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</li>
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{{- range seq (sub $lastHeaderLevel $firstHeaderLevel) -}}
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{{- if in ($.Scratch.Get "bareul") (add . $firstHeaderLevel) -}}
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</ul>
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{{- else -}}
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</ul>
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</li>
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{{- end -}}
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{{- end -}}
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</ul>
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</details>
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{{- end -}} |