Fix autolinking to not include trailing tags as part of the URL

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@2237 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/lib/action_view/helpers/text_helper.rb

@@ -279,9 +279,27 @@ module ActionView
           text.gsub(/([\\|?+*\/\)\(])/) { |m| "\\#{$1}" }
         end
 
+        AUTO_LINK_RE = /
+                        (                       # leading text
+                          <\w+.*?>|             #   leading HTML tag, or
+                          [^=!:'"\/]|           #   leading punctuation, or 
+                          ^                     #   beginning of line
+                        )
+                        (
+                          (?:http[s]?:\/\/)|    # protocol spec, or
+                          (?:www\.)             # www.*
+                        ) 
+                        (
+                          ([\w]+[\/.-]?)*       # url segment
+                          \w+[\/]?              # url tail
+                          (?:\#\w*)?            # trailing anchor
+                        )
+                        ([[:punct:]]|\s|<|$)    # trailing text
+                       /x
+
         # Turns all urls into clickable links.
         def auto_link_urls(text, href_options = {})
-          text.gsub(/(<\w+.*?>|[^=!:'"\/]|^)((?:http[s]?:\/\/)|(?:www\.))(([\w]+[[:punct:]]?)*\w+[\/]?)([[:punct:]]|\s|<|$)/) do
+          text.gsub(AUTO_LINK_RE) do
             all, a, b, c, d = $&, $1, $2, $3, $5
             if a =~ /<a\s/i # don't replace URL's that are already linked
               all

actionpack/test/template/text_helper_test.rb

@@ -119,6 +119,13 @@ class TextHelperTest < Test::Unit::TestCase
     assert_equal %(<p>Go to #{link3_result}. seriously, #{link3_result}? i think I'll say hello to #{email_result}. instead.</p>), auto_link(%(<p>Go to #{link3_raw}. seriously, #{link3_raw}? i think I'll say hello to #{email_raw}. instead.</p>))
   end
 
+  def test_auto_link_at_eol
+    url1 = "http://api.rubyonrails.com/Foo.html"
+    url2 = "http://www.ruby-doc.org/core/Bar.html"
+
+    assert_equal %(<p><a href="#{url1}">#{url1}</a><br /><a href="#{url2}">#{url2}</a><br /></p>), auto_link("<p>#{url1}<br />#{url2}<br /></p>")
+  end
+
   def test_sanitize_form
     raw = "<form action=\"/foo/bar\" method=\"post\"><input></form>"
     result = sanitize(raw)