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require "action_view/view_paths"
module ActionView
# 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 ActionView::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
routes = respond_to?(:_routes) && _routes
helpers = respond_to?(:_helpers) && _helpers
Class.new(ActionView::Base) do
if routes
include routes.url_helpers
include routes.mounted_helpers
end
if helpers
include helpers
end
end
end
end
end
attr_internal_writer :view_context_class
def view_context_class
@_view_context_class ||= self.class.view_context_class
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(view_renderer, view_assigns, self)
end
# Returns an object that is able to render templates.
# :api: private
def view_renderer
@_view_renderer ||= ActionView::Renderer.new(lookup_context)
end
def render_to_body(options = {})
_process_options(options)
_render_template(options)
end
def rendered_format
Mime[lookup_context.rendered_format]
end
private
# Find and render a template based on the options given.
# :api: private
def _render_template(options) #:nodoc:
variant = options[:variant]
lookup_context.rendered_format = nil if options[:formats]
lookup_context.variants = variant if variant
view_renderer.render(view_context, options)
end
# Assign the rendered format to lookup context.
def _process_format(format, options = {}) #:nodoc:
super
if options[:body]
self.no_content_type = true
end
lookup_context.formats = [format.to_sym]
lookup_context.rendered_format = lookup_context.formats.first
end
# Normalize args by converting render "foo" to render :action => "foo" and
# render "foo/bar" to render :file => "foo/bar".
# :api: private
def _normalize_args(action=nil, options={})
options = super(action, 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
# Normalize options.
# :api: private
def _normalize_options(options)
options = super(options)
if options[:partial] == true
options[:partial] = action_name
end
if (options.keys & [:partial, :file, :template]).empty?
options[:prefixes] ||= _prefixes
end
options[:template] ||= (options[:action] || action_name).to_s
options
end
end
end
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