From 071c9af7bbf776f6c4f9a2c41077df4a9212210e Mon Sep 17 00:00:00 2001
From: Nero <41307858+nero@users.noreply.github.com>
Date: Sun, 26 Jun 2022 00:24:23 +0000
Subject: [PATCH] Generate id atteributes for headings

---
 md2html | 29 ++++++++++++-----------------
 1 file changed, 12 insertions(+), 17 deletions(-)

diff --git a/md2html b/md2html
index ab5c6d1..11c42b4 100755
--- a/md2html
+++ b/md2html
@@ -130,25 +130,20 @@ function inline(text) {
   next
 }
 
-/^# / {
+/^##* / {
+  d=length($1)
   gsub(/^#* /, "", $0)
-  if (!meta["title"]) meta["title"] = $0
+  if (d==1 && !meta["title"]) meta["title"] = $0
+  id1=$0
+  gsub(/[^a-zA-Z0-9]/, "", id1)
+  hash[d]=id1
+  id = ""
+  for (i = 2; i <= d; i++) {
+    id = id hash[i]
+  }
+  if (id != "") id = " id=\"" escape(id) "\""
   level(prefix)
-  oneliner("h1", $0)
-  next
-}
-
-/^## / {
-  gsub(/^#* /, "", $0)
-  level(prefix)
-  oneliner("h2", $0)
-  next
-}
-
-/^### / {
-  gsub(/^#* /, "", $0)
-  level(prefix)
-  oneliner("h3", $0)
+  oneliner("h"d, $0, id)
   next
 }