From f73a870fcb252eeefc57a8336f415997f6d7b1e6 Mon Sep 17 00:00:00 2001
From: EuAndreh <eu@euandre.org>
Date: Thu, 17 Apr 2025 09:04:19 -0300
Subject: src/adoc: Add fix_footnotes() to the pipeline

---
 src/adoc | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)

diff --git a/src/adoc b/src/adoc
index 8270a44..f99e7d5 100755
--- a/src/adoc
+++ b/src/adoc
@@ -46,6 +46,66 @@ plaintext_links() {
 	}'
 }
 
+fix_footnotes() {
+	awk '
+	match($0, /<sup class="footnote".*<\/sup>/) {
+		before = substr($0, 1, RSTART - 1)
+		middle = substr($0, RSTART, RLENGTH)
+		after  = substr($0, RSTART + RLENGTH)
+
+		n = split(middle, segments, "\"")
+		if (n != 13) {
+			print "Bad <sup ...> match" > "/dev/stderr"
+			exit 1
+		}
+		id = substr(segments[4], length("_footnote_") + 1)
+		IDS[IDIDX++] = id
+
+		ending = "</a>]</sup>"
+		match(middle, />[0-9]+<\/a>\]<\/sup>$/)
+		num = substr(middle, RSTART + 1, RLENGTH - length(ending) - 1)
+
+		sup = sprintf("<sup role=\"doc-noteref\" id=\"ref:%s\">", id)
+		a   = sprintf("<a href=\"#fn:%s\" rel=\"footnote\">",i    id)
+		newmiddle = sup a num "</a></sup>"
+		printf "%s%s%s\n", before, newmiddle, after
+		next
+	}
+	/^<div class="footnote" id="_footnotedef_[0-9]+">$/ {
+		if (has_ol == 0) {
+			print "<ol>"
+			has_ol = 1
+		}
+		next
+	}
+	match($0, /^<a href="#_footnoteref_[0-9]+">[0-9]+<\/a>/) {
+		id = IDS[FNIDX++]
+		content = substr($0, RLENGTH + length(". ") + 1)
+
+		li = sprintf("<li role=\"doc-endnote\" id=\"fn:%s\">", id)
+		a  = sprintf("<a role=\"doc-backlink\" href=\"#ref:%s\">", id)
+		print li content " " a "↩</a></li>"
+		next
+	}
+	has_ol == 1 && /^<\/div>$/ {
+		divcount++
+		if (divcount == 2) {
+			print "</ol>"
+			has_ol = 0
+			divcount = 0
+		}
+		next
+	}
+	in_footnotes == 0 && $0 == "<div id=\"footnotes\">" {
+		in_footnotes = 1
+	}
+	in_footnotes == 1 && $0 == "<hr>" {
+		next
+	}
+	{ print }
+	'
+}
+
 fix_header_anchor_position() {
 	sed 's|^\(<h2 .*\)\(<a .*</a>\)\(.*\)\(</h2>\)$|\1\3\2\4|'
 }
@@ -138,4 +198,5 @@ cat "$FILENAME" |
 	runadoc                    |
 	fix_header_anchor_position |
 	add_linenums               |
+	fix_footnotes              |
 	indent_4_blocks
-- 
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