From 480150e5fb73f1a6a23bb08fdf9a537ccbd6f60d Mon Sep 17 00:00:00 2001
From: David Heinemeier Hansson <david@loudthinking.com>
Date: Wed, 6 Apr 2005 15:22:32 +0000
Subject: Fixed autolinking to work better in more cases #1013 [Jamis Buck]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1099 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
---
 actionpack/lib/action_view/helpers/text_helper.rb | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'actionpack/lib')

diff --git a/actionpack/lib/action_view/helpers/text_helper.rb b/actionpack/lib/action_view/helpers/text_helper.rb
index 043e1dc305..5fcb8a250f 100644
--- a/actionpack/lib/action_view/helpers/text_helper.rb
+++ b/actionpack/lib/action_view/helpers/text_helper.rb
@@ -157,7 +157,14 @@ module ActionView
 
         # Turns all urls into clickable links.
         def auto_link_urls(text)
-          text.gsub(/([^=><!:'"\/]|^)((http[s]?:\/\/)|(www\.))(\S+\b\/?)([[:punct:]]*)(\s|$)/, '\1<a href="\3\4\5">\3\4\5</a>\6\7')
+          text.gsub(/(<\w+.*?>|[^=!:'"\/]|^)((?:http[s]?:\/\/)|(?:www\.))([^\s<]+\/?)([[:punct:]]|\s|<|$)/) do
+            all, a, b, c, d = $&, $1, $2, $3, $4
+            if a =~ /<a\s/i # don't replace URL's that are already linked
+              all
+            else
+              %(#{a}<a href="#{b=="www."?"http://www.":b}#{c}">#{b}#{c}</a>#{d})
+            end
+          end
         end
 
         # Turns all email addresses into clickable links.
-- 
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