94 lines
4.2 KiB
HTML
94 lines
4.2 KiB
HTML
{{- $headers := findRE "<h[1-6].*?>(.|\n])+?</h[1-6]>" .Content -}}
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{{- $has_headers := ge (len $headers) 1 -}}
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{{- if $has_headers -}}
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<div class="toc">
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<details {{if (.Param "TocOpen") }} open{{ end }}>
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<summary accesskey="c" title="(Alt + C)">
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<div class="details">{{- i18n "toc" | default "Table of Contents" }}</div>
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</summary>
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<div class="inner">
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{{- $largest := 6 -}}
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{{- range $headers -}}
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{{- $headerLevel := index (findRE "[1-6]" . 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 "[1-6]" (index $headers 0) 1) 0)) -}}
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{{- $.Scratch.Set "bareul" slice -}}
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<ul>
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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 "[1-6]" . 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[1-6].*?>((.|\n])+?)</h[1-6]>" "$1" $header -}}
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{{- if ne $i 0 -}}
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{{- $prevHeaderLevel := index (findRE "[1-6]" (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 -}}" aria-label="{{- $header | plainify -}}">{{- $header | safeHTML -}}</a>
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{{- else }}
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<li>
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<a href="#{{- $cleanedID -}}" aria-label="{{- $header | plainify -}}">{{- $header | safeHTML -}}</a>
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{{- end -}}
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{{- end -}}
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<!-- {{- $firstHeaderLevel := len (seq (index (findRE "[1-6]" (index $headers 0) 1) 0)) -}} -->
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{{- $firstHeaderLevel := $largest }}
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{{- $lastHeaderLevel := len (seq (index (findRE "[1-6]" (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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</div>
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</details>
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</div>
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{{- end }}
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