--- /dev/null
+module ActionView #:nodoc:
+ class PathSet < Array #:nodoc:
+ def self.type_cast(obj)
+ if obj.is_a?(String)
+ if Base.warn_cache_misses && defined?(Rails) && Rails.initialized?
+ Base.logger.debug "[PERFORMANCE] Processing view path during a " +
+ "request. This an expense disk operation that should be done at " +
+ "boot. You can manually process this view path with " +
+ "ActionView::Base.process_view_paths(#{obj.inspect}) and set it " +
+ "as your view path"
+ end
+ Path.new(obj)
+ else
+ obj
+ end
+ end
+
+ def initialize(*args)
+ super(*args).map! { |obj| self.class.type_cast(obj) }
+ end
+
+ def <<(obj)
+ super(self.class.type_cast(obj))
+ end
+
+ def concat(array)
+ super(array.map! { |obj| self.class.type_cast(obj) })
+ end
+
+ def insert(index, obj)
+ super(index, self.class.type_cast(obj))
+ end
+
+ def push(*objs)
+ super(*objs.map { |obj| self.class.type_cast(obj) })
+ end
+
+ def unshift(*objs)
+ super(*objs.map { |obj| self.class.type_cast(obj) })
+ end
+
+ class Path #:nodoc:
+ def self.eager_load_templates!
+ @eager_load_templates = true
+ end
+
+ def self.eager_load_templates?
+ @eager_load_templates || false
+ end
+
+ attr_reader :path, :paths
+ delegate :to_s, :to_str, :hash, :inspect, :to => :path
+
+ def initialize(path, load = true)
+ raise ArgumentError, "path already is a Path class" if path.is_a?(Path)
+ @path = path.freeze
+ reload! if load
+ end
+
+ def ==(path)
+ to_str == path.to_str
+ end
+
+ def eql?(path)
+ to_str == path.to_str
+ end
+
+ def [](path)
+ raise "Unloaded view path! #{@path}" unless @loaded
+ @paths[path]
+ end
+
+ def loaded?
+ @loaded ? true : false
+ end
+
+ def load
+ reload! unless loaded?
+ self
+ end
+
+ # Rebuild load path directory cache
+ def reload!
+ @paths = {}
+
+ templates_in_path do |template|
+ # Eager load memoized methods and freeze cached template
+ template.freeze if self.class.eager_load_templates?
+
+ @paths[template.path] = template
+ @paths[template.path_without_extension] ||= template
+ end
+
+ @paths.freeze
+ @loaded = true
+ end
+
+ private
+ def templates_in_path
+ (Dir.glob("#{@path}/**/*/**") | Dir.glob("#{@path}/**")).each do |file|
+ unless File.directory?(file)
+ yield Template.new(file.split("#{self}/").last, self)
+ end
+ end
+ end
+ end
+
+ def load
+ each { |path| path.load }
+ end
+
+ def reload!
+ each { |path| path.reload! }
+ end
+
+ def [](template_path)
+ each do |path|
+ if template = path[template_path]
+ return template
+ end
+ end
+ nil
+ end
+ end
+end