Added template lookup responsible to hold all information used in template lookup.

1 files changed, 48 insertions, 0 deletions

diff --git a/actionpack/lib/action_view/template/lookup.rb b/actionpack/lib/action_view/template/lookup.rb
new file mode 100644
index 0000000000..ea3a12615b
--- /dev/null
+++ b/actionpack/lib/action_view/template/lookup.rb
@@ -0,0 +1,48 @@
+module ActionView
+  class Template
+    class Lookup
+      attr_reader :details, :view_paths
+
+      class DetailsKey
+        attr_reader :details
+        alias :eql? :equal?
+
+        @details_keys = Hash.new
+
+        def self.get(details)
+          @details_keys[details] ||= new(details)
+        end
+
+        def initialize(details)
+          @details, @hash = details, details.hash
+        end
+      end
+
+      def initialize(view_paths, details = {})
+        @details = details
+        self.view_paths = view_paths
+      end
+
+      def view_paths=(paths)
+        @view_paths = ActionView::Base.process_view_paths(paths)
+      end
+
+      def details=(details)
+        @details = details
+        @details_key = nil if @details_key && @details_key.details != details
+      end
+
+      def details_key
+        @details_key ||= DetailsKey.get(details) unless details.empty?
+      end
+
+      def find(name, prefix = nil, partial = false)
+        @view_paths.find(name, details, prefix, partial || false, details_key)
+      end
+
+      def exists?(name, prefix = nil, partial = false)
+        @view_paths.exists?(name, details, prefix, partial || false, details_key)
+      end
+    end
+  end
+end
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