Extracts a diff helper from the WikiDiff class.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4952 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/wiki_helper.rb

@@ -1,5 +1,5 @@
-# redMine - project management software
-# Copyright (C) 2006-2007  Jean-Philippe Lang
+# Redmine - project management software
+# Copyright (C) 2006-2011  Jean-Philippe Lang
 #
 # This program is free software; you can redistribute it and/or
 # modify it under the terms of the GNU General Public License
@@ -29,41 +29,4 @@ module WikiHelper
     end
     s
   end
-  
-  def html_diff(wdiff)
-    words = wdiff.words.collect{|word| h(word)}
-    words_add = 0
-    words_del = 0
-    dels = 0
-    del_off = 0
-    wdiff.diff.diffs.each do |diff|
-      add_at = nil
-      add_to = nil
-      del_at = nil
-      deleted = ""	    
-      diff.each do |change|
-        pos = change[1]
-        if change[0] == "+"
-          add_at = pos + dels unless add_at
-          add_to = pos + dels
-          words_add += 1
-        else
-          del_at = pos unless del_at
-          deleted << ' ' + h(change[2])
-          words_del	 += 1
-        end
-      end
-      if add_at
-        words[add_at] = '<span class="diff_in">' + words[add_at]
-        words[add_to] = words[add_to] + '</span>'
-      end
-      if del_at
-        words.insert del_at - del_off + dels + words_add, '<span class="diff_out">' + deleted + '</span>'
-        dels += 1
-        del_off += words_del
-        words_del = 0
-      end
-    end
-    simple_format_without_paragraph(words.join(' '))
-  end
 end