From ae55f6f3fd50539c90fbc8237ae025edc9b17ba4 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Paul=20H=C3=A4nsch?= <paul@plutz.net>
Date: Mon, 28 Aug 2023 11:51:26 +0200
Subject: [PATCH] introducing definition lists!

---
 markdown.awk | 38 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

diff --git a/markdown.awk b/markdown.awk
index ffa225b..be7d723 100755
--- a/markdown.awk
+++ b/markdown.awk
@@ -54,7 +54,7 @@
 #   - [x] Pipe table (php md, pandoc)
 # - [x] Line blocks (pandoc)
 # - [x] Task lists (pandoc, custom)
-# - [ ] Definition lists (php md, pandoc)
+# - [x] Definition lists (php md, pandoc)
 # - [-] Numbered example lists (pandoc)
 # - [-] Metadata blocks (pandoc)
 # - [x] Metadata blocks (custom)
@@ -590,6 +590,17 @@ function _block( block, LOCAL, st, len, hlvl, htxt, sec, guard, code, indent, at
   gsub("(^|\n) {0," indent "}", "\n", list);
   return "\n<ol>\n" _list( substr(list, 2) ) "</ol>\n" _block( block );
 
+  # Definition list
+  } else if (match( block, "^(([ \t]*\n)*[^:\n \t][^\n]+\n" \
+                           "([ \t]*\n)* ? ? ?:[ \t][^\n]+(\n|$)" \
+                           "(([ \t]*\n)* ? ? ?:[ \t][^\n]+(\n|$)" \
+                           "|[^:\n \t][^\n]+(\n|$)" \
+                           "|( ? ? ?\t|  +)[^\n]+(\n|$)" \
+                           "|([ \t]*\n)+( ? ? ?\t|  +)[^\n]+(\n|$))*)+" \
+  )) {
+  list = substr( block, 1, RLENGTH); block = substr( block, RLENGTH + 1);
+  return "\n<dl>\n" _dlist( list ) "</dl>\n" _block( block );
+
   # First Order Heading H1 + Attrib
   } else if ( match( block, /^([^\n]+)([ \t]*\{([^\}\n]+)\})\n===+(\n|$)/ ) ) {
     len = RLENGTH;
@@ -721,6 +732,31 @@ function _block( block, LOCAL, st, len, hlvl, htxt, sec, guard, code, indent, at
   }
 }
 
+function _dlist (block, LOCAL, len, st, text, indent, p) {
+  if (match( block, "^([ \t]*\n)*[^:\n \t][^\n]+\n" )) {
+    len = RLENGTH; text = substr(block, 1, len);
+    gsub( "(^\n*|\n*$)", "", text );
+    return "<dt>" inline( text ) "</dt>\n" _dlist( substr(block, len + 1) );
+  } else if (match( block, "^([ \t]*\n)* ? ? ?:[ \t][^\n]+(\n|$)" \
+                         "([^:\n \t][^\n]+(\n|$)" \
+                         "|( ? ? ?\t|  +)[^\n]+(\n|$)" \
+                         "|([ \t]*\n)+( ? ? ?\t|  +)[^\n]+(\n|$))*" \
+  )) {
+    len = RLENGTH; text = substr(block, 1, len);
+    if (match( text, "^ ? ? ?:[ \t][^\n]+(\n|$)" \
+                    "([^:\n \t][^\n]+(\n|$)" \
+                    "|( ? ? ?\t|  +)[^\t\n ][^\n]*(\n|$))*$" \
+    )) p = 1; else p = 0;
+    sub( "^([ \t]*\n)*", "", text);
+    match(text, "^ ? ? ?:(\t| +)"); indent = RLENGTH;
+    sub( "^ ? ? ?:(\t| +)", "", text);
+    gsub( "(^|\n) {0," indent "}", "\n", text );
+    text = _block(text);
+    if (p) gsub("(^\n*<p>|</p>\n*$)", "", text);
+    return "<dd>" text "</dd>\n" _dlist( substr(block, len + 1) );
+  }
+}
+
 function _list( block, last, LOCAL, p) {
   if ( ! length(block) ) return "";
   gsub(/^([-+*]|[0-9]+\.|#\.)(  ? ? ?|\t)/, "", block)
-- 
2.39.2