require 'action_view/base' module ActionView module ViewPaths extend ActiveSupport::Concern included do class_attribute :_view_paths self._view_paths = ActionView::PathSet.new self._view_paths.freeze end delegate :template_exists?, :view_paths, :formats, :formats=, :locale, :locale=, :to => :lookup_context module ClassMethods def _prefixes # :nodoc: @_prefixes ||= begin return local_prefixes if superclass.abstract? local_prefixes + superclass._prefixes end end private # Override this method in your controller if you want to change paths prefixes for finding views. # Prefixes defined here will still be added to parents' ._prefixes. def local_prefixes [controller_path] end end # The prefixes used in render "foo" shortcuts. def _prefixes # :nodoc: self.class._prefixes end # LookupContext is the object responsible for holding all # information required for looking up templates, i.e. view paths and # details. Check ActionView::LookupContext for more information. def lookup_context @_lookup_context ||= ActionView::LookupContext.new(self.class._view_paths, details_for_lookup, _prefixes) end def details_for_lookup { } end def append_view_path(path) lookup_context.view_paths.push(*path) end def prepend_view_path(path) lookup_context.view_paths.unshift(*path) end module ClassMethods # Append a path to the list of view paths for this controller. # # ==== Parameters # * path - If a String is provided, it gets converted into # the default view path. You may also provide a custom view path # (see ActionView::PathSet for more information) def append_view_path(path) self._view_paths = view_paths + Array(path) end # Prepend a path to the list of view paths for this controller. # # ==== Parameters # * path - If a String is provided, it gets converted into # the default view path. You may also provide a custom view path # (see ActionView::PathSet for more information) def prepend_view_path(path) self._view_paths = ActionView::PathSet.new(Array(path) + view_paths) end # A list of all of the default view paths for this controller. def view_paths _view_paths end # Set the view paths. # # ==== Parameters # * paths - If a PathSet is provided, use that; # otherwise, process the parameter into a PathSet. def view_paths=(paths) self._view_paths = ActionView::PathSet.new(Array(paths)) end end end end