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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.
class I18nProxy < ::I18n::Config #:nodoc:
attr_reader :original_config, :lookup_context
def initialize(original_config, lookup_context)
original_config = original_config.original_config if original_config.respond_to?(:original_config)
@original_config, @lookup_context = original_config, lookup_context
end
def locale
@original_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?(:_routes) && controller._routes
include controller._routes.url_helpers
include controller._routes.mounted_helpers
end
if controller.respond_to?(:_helpers)
include controller._helpers
# TODO: Fix RJS to not require this
self.helpers = controller._helpers
end
end
end
end
def parent_prefixes
@parent_prefixes ||= begin
parent_controller = superclass
prefixes = []
until parent_controller.abstract?
prefixes << parent_controller.controller_path
parent_controller = parent_controller.superclass
end
prefixes
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).tap { self.response_body = nil }
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 prefixes used in render "foo" shortcuts.
def _prefixes
@_prefixes ||= begin
parent_prefixes = self.class.parent_prefixes
parent_prefixes.dup.unshift(controller_path)
end
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, name.length]] = 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
when String, Symbol
action = action.to_s
key = action.include?(?/) ? :file : :action
options[key] = action
else
options[:partial] = action
end
options
end
def _normalize_options(options)
if options[:partial] == true
options[:partial] = action_name
end
if (options.keys & [:partial, :file, :template, :once]).empty?
options[:prefixes] ||= _prefixes
end
options[:template] ||= (options[:action] || action_name).to_s
options
end
def _process_options(options)
end
end
end
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