2 files changed, 55 insertions, 0 deletions
diff --git a/lib/coderay.rb b/lib/coderay.rb
index 1f067db..c1025c7 100644
--- a/lib/coderay.rb
+++ b/lib/coderay.rb
@@ -141,6 +141,7 @@ module CodeRay
   require 'coderay/encoder'
   require 'coderay/duo'
   require 'coderay/style'
+  require 'coderay/for_redcloth'
 
 
   class << self
diff --git a/lib/coderay/for_redcloth.rb b/lib/coderay/for_redcloth.rb
new file mode 100644
index 0000000..4de597e
--- /dev/null
+++ b/lib/coderay/for_redcloth.rb
@@ -0,0 +1,54 @@
+# A little hack to enable CodeRay highlighting in RedCloth.
+
+module CodeRay
+  
+  # A little hack to enable CodeRay highlighting in RedCloth.
+  # 
+  # Usage:
+  #  require 'coderay'
+  #  CodeRay.for_redcloth
+  #  RedCloth.new('@[ruby]puts "Hello, World!"@').to_html
+  # 
+  # Make sure you have RedCloth 4.0.3 activated, for example by calling
+  #  require 'rubygems'
+  # before RedCloth is loaded and before calling CodeRay.for_redcloth.
+  def self.for_redcloth
+    gem 'RedCloth', '>= 4.0.3' rescue nil
+    require 'redcloth'
+    raise 'CodeRay.for_redcloth needs RedCloth 4.0.3 or later.' unless RedCloth::VERSION.to_s >= '4.0.3'
+    RedCloth::TextileDoc.send :include, ForRedCloth::TextileDoc
+    RedCloth::Formatters::HTML.module_eval do
+      undef_method :code, :bc_open, :bc_close
+      def code(opts)
+        opts[:block] = true
+        if opts[:lang] && !filter_coderay
+          require 'coderay'
+          @in_bc ||= nil
+          format = @in_bc ? :div : :span
+          highlighted_code = CodeRay.encode opts[:text], opts[:lang], format, :stream => true
+          highlighted_code.sub(/\A<(span|div)/) { |m| m + pba(@in_bc || opts) }
+        else
+          "<code#{pba(opts)}>#{opts[:text]}</code>"
+        end
+      end
+      def bc_open(opts)
+        opts[:block] = true
+        @in_bc = opts
+        opts[:lang] ? '' : "<pre#{pba(opts)}>"
+      end
+      def bc_close(opts)
+        @in_bc = nil
+        opts[:lang] ? '' : "</pre>\n"
+      end
+    end
+  end
+  
+  module ForRedCloth # :nodoc:
+    
+    module TextileDoc # :nodoc:
+      attr_accessor :filter_coderay
+    end
+    
+  end
+  
+end