require "abstract_controller/base" require "action_view" module AbstractController class DoubleRenderError < Error DEFAULT_MESSAGE = "Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action. Also note that neither redirect nor render terminate execution of the action, so if you want to exit an action after redirecting, you need to do something like \"redirect_to(...) and return\"." def initialize(message = nil) super(message || DEFAULT_MESSAGE) end end # This is a class to fix I18n global state. Whenever you provide I18n.locale during a request, # it will trigger the lookup_context and consequently expire the cache. # TODO Add some deprecation warnings to remove I18n.locale from controllers class I18nProxy < ::I18n::Config #:nodoc: attr_reader :i18n_config, :lookup_context def initialize(i18n_config, lookup_context) @i18n_config, @lookup_context = i18n_config, lookup_context end def locale @i18n_config.locale end def locale=(value) @lookup_context.locale = value end end module Rendering extend ActiveSupport::Concern include AbstractController::ViewPaths # Overwrite process to setup I18n proxy. def process(*) #:nodoc: old_config, I18n.config = I18n.config, I18nProxy.new(I18n.config, lookup_context) super ensure I18n.config = old_config end module ClassMethods def view_context_class @view_context_class ||= begin controller = self Class.new(ActionView::Base) do if controller.respond_to?(:_helpers) include controller._helpers if controller.respond_to?(:_router) include controller._router.url_helpers end # TODO: Fix RJS to not require this self.helpers = controller._helpers end end end end end attr_writer :view_context_class def view_context_class @view_context_class || self.class.view_context_class end def initialize(*) @view_context_class = nil super end # An instance of a view class. The default view class is ActionView::Base # # The view class must have the following methods: # View.new[lookup_context, assigns, controller] # Create a new ActionView instance for a controller # View#render[options] # Returns String with the rendered template # # Override this method in a module to change the default behavior. def view_context view_context_class.new(lookup_context, view_assigns, self) end # Normalize arguments, options and then delegates render_to_body and # sticks the result in self.response_body. def render(*args, &block) self.response_body = render_to_string(*args, &block) end # Raw rendering of a template to a string. Just convert the results of # render_to_body into a String. # :api: plugin def render_to_string(*args, &block) options = _normalize_args(*args, &block) _normalize_options(options) render_to_body(options) end # Raw rendering of a template to a Rack-compatible body. # :api: plugin def render_to_body(options = {}) _process_options(options) _render_template(options) end # Find and renders a template based on the options given. # :api: private def _render_template(options) #:nodoc: view_context.render(options) end # The prefix used in render "foo" shortcuts. def _prefix controller_path end private # This method should return a hash with assigns. # You can overwrite this configuration per controller. # :api: public def view_assigns hash = {} variables = instance_variable_names variables -= protected_instance_variables if respond_to?(:protected_instance_variables) variables.each { |name| hash[name.to_s[1..-1]] = instance_variable_get(name) } hash end # Normalize options by converting render "foo" to render :action => "foo" and # render "foo/bar" to render :file => "foo/bar". def _normalize_args(action=nil, options={}) case action when NilClass when Hash options, action = action, nil when String, Symbol action = action.to_s key = action.include?(?/) ? :file : :action options[key] = action else options.merge!(:partial => action) end options end def _normalize_options(options) if options[:partial] == true options[:partial] = action_name end if (options.keys & [:partial, :file, :template]).empty? options[:prefix] ||= _prefix end options[:template] ||= (options[:action] || action_name).to_s options end def _process_options(options) end end end