Extract CodeRay calls to Redmine::SyntaxHighlighting (#2985).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3584 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/application_helper.rb

@@ -15,8 +15,6 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
-require 'coderay'
-require 'coderay/helpers/file_type'
 require 'forwardable'
 require 'cgi'
 
@@ -284,8 +282,7 @@ module ApplicationHelper
   end
 
   def syntax_highlight(name, content)
-    type = CodeRay::FileType[name]
-    type ? CodeRay.scan(content, type).html : h(content)
+    Redmine::SyntaxHighlighting.highlight_by_filename(content, name)
   end
 
   def to_path_param(path)