Split out ri display code and make pluggable

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@5386 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rdoc/ri/ri_options.rb

@@ -3,6 +3,8 @@
 
 module RI
 
+  require 'rdoc/ri/ri_display'
+
   VERSION_STRING = "alpha 0.1"
 
   class Options
@@ -201,6 +203,14 @@ module RI
     def paths
       @doc_dir ? [ @doc_dir ] : nil
     end
+
+    # Return an instance of the displayer (the thing that actually writes
+    # the information). This allows us to load in new displayer classes
+    # at runtime (for example to help with IDE integration)
+    
+    def displayer
+      ::RiDisplay.new(self)
+    end
   end
 
 end