From 86b0d0c422e34c38837b5b5495ad6d295d0e73d2 Mon Sep 17 00:00:00 2001
From: rtk0c <mail.tianyig@gmail.com>
Date: Mon, 1 Sep 2025 11:27:12 -0700
Subject: Squashed 'themes/PaperMod/' content from commit 5a46517

git-subtree-dir: themes/PaperMod
git-subtree-split: 5a4651783fa9159123d947bd3511b355146d4797
---
 layouts/partials/toc.html | 97 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 layouts/partials/toc.html

(limited to 'layouts/partials/toc.html')

diff --git a/layouts/partials/toc.html b/layouts/partials/toc.html
new file mode 100644
index 0000000..28f8694
--- /dev/null
+++ b/layouts/partials/toc.html
@@ -0,0 +1,97 @@
+{{- $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 | safeHTML -}}">{{- $header | plainify | safeHTML -}}</a>
+                    {{- else }}
+                <li>
+                    <a href="#{{- $cleanedID -}}" aria-label="{{- $header | plainify | safeHTML -}}">{{- $header | plainify | 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 }}
-- 
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