Continue extracting URL generation logic from model classes

app/controllers/application.rb

@@ -2,8 +2,8 @@
 # Likewise will all the methods added be available for all controllers.
 class ApplicationController < ActionController::Base
 
-  before_filter :set_utf8_http_header, :connect_to_model
-  after_filter :remember_location
+  before_filter :set_utf8_http_header, :connect_to_model, :setup_url_generator
+  after_filter :remember_location, :teardown_url_generator
 
   # For injecting a different wiki model implementation. Intended for use in tests
   def self.wiki=(the_wiki)
@@ -146,6 +146,14 @@ class ApplicationController < ActionController::Base
     @response.headers['Content-Type'] = 'text/html; charset=UTF-8'
   end
 
+  def setup_url_generator
+    PageRenderer.setup_url_generator(UrlGenerator.new(self))
+  end
+
+  def teardown_url_generator
+    PageRenderer.teardown_url_generator
+  end
+
   def wiki
     self.class.wiki
   end