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toc: add toc partial [newer impl]

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* gets toc fixed

Signed-off-by: Aditya Telange <21258296+adityatelange@users.noreply.github.com>
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Allan Chain 2020-01-07 15:58:33 +08:00 committed by Aditya Telange
parent 7820730b04
commit 43d1c68ef4
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GPG Key ID: 82E844EF3DA99E77
1 changed files with 84 additions and 0 deletions
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layouts/partials/toc.html Normal file
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{{- $headers := findRE "<h[1-4].*?>(.|\n])+?</h[1-4]>" .Content -}}
{{- $has_headers := ge (len $headers) 1 -}}
{{- if $has_headers -}}
{{- $largest := 6 -}}
{{- range $headers -}}
{{- $headerLevel := index (findRE "[1-4]" . 1) 0 -}}
{{- $headerLevel := len (seq $headerLevel) -}}
{{- if lt $headerLevel $largest -}}
{{- $largest = $headerLevel -}}
{{- end -}}
{{- end -}}
{{- $firstHeaderLevel := len (seq (index (findRE "[1-4]" (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 "[1-4]" . 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[1-4].*?>((.|\n])+?)</h[1-4]>" "$1" $header -}}
{{- if ne $i 0 -}}
{{- $prevHeaderLevel := index (findRE "[1-4]" (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 -}}">{{- $header | safeHTML -}}</a>
{{- else -}}
<li>
<a href="#{{- $cleanedID -}}">{{- $header | safeHTML -}}</a>
{{- end -}}
{{- end -}}
<!-- {{- $firstHeaderLevel := len (seq (index (findRE "[1-4]" (index $headers 0) 1) 0)) -}} -->
{{ $firstHeaderLevel := $largest }}
{{- $lastHeaderLevel := len (seq (index (findRE "[1-4]" (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 -}}