From 7232ed56774f9bfc89e4a31d486fa2f82bdec1ec Mon Sep 17 00:00:00 2001
From: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Date: Thu, 5 Apr 2007 14:20:00 +0000
Subject: HTML IRCification: try to handle super and subscripts

---
 lib/rbot/core/utils/extends.rb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/rbot/core/utils/extends.rb b/lib/rbot/core/utils/extends.rb
index ff9d0f35..4b7e57f3 100644
--- a/lib/rbot/core/utils/extends.rb
+++ b/lib/rbot/core/utils/extends.rb
@@ -61,6 +61,12 @@ class ::String
     txt.gsub!("\n", ' ')
     txt.gsub!("\r", ' ')
 
+    # Superscripts and subscripts are turned into ^{...} and _{...}
+    # where the {} are omitted for single characters
+    txt.gsub!(/<sup>(.*?)<\/sup>/, '^{\1}')
+    txt.gsub!(/<sub>(.*?)<\/sub>/, '_{\1}')
+    txt.gsub!(/(^|_)\{(.)\}/, '\1\2')
+
     # All other tags are just removed
     txt.gsub!(/<[^>]+>/, '')
 
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