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require 'active_support/core_ext/class/attribute'
require 'active_support/core_ext/object/blank'
module ActionController
def self.add_renderer(key, &block)
Renderers.add(key, &block)
end
module Renderers
extend ActiveSupport::Concern
included do
class_attribute :_renderers
self._renderers = {}.freeze
end
module ClassMethods
def _write_render_options
renderers = _renderers.map do |name, value|
<<-RUBY_EVAL
if options.key?(:#{name})
_process_options(options)
return _render_option_#{name}(options.delete(:#{name}), options)
end
RUBY_EVAL
end
class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1
def _handle_render_options(options)
#{renderers.join}
end
RUBY_EVAL
end
def use_renderers(*args)
new = _renderers.dup
args.each do |key|
new[key] = RENDERERS[key]
end
self._renderers = new.freeze
_write_render_options
end
alias use_renderer use_renderers
end
def render_to_body(options)
_handle_render_options(options) || super
end
RENDERERS = {}
def self.add(key, &block)
define_method("_render_option_#{key}", &block)
RENDERERS[key] = block
All._write_render_options
end
module All
extend ActiveSupport::Concern
include Renderers
INCLUDED = []
included do
self._renderers = RENDERERS
_write_render_options
INCLUDED << self
end
def self._write_render_options
INCLUDED.each(&:_write_render_options)
end
end
add :json do |json, options|
json = json.to_json(options) unless json.respond_to?(:to_str)
json = "#{options[:callback]}(#{json})" unless options[:callback].blank?
self.content_type ||= Mime::JSON
self.response_body = json
end
add :js do |js, options|
self.content_type ||= Mime::JS
self.response_body = js.respond_to?(:to_js) ? js.to_js(options) : js
end
add :xml do |xml, options|
self.content_type ||= Mime::XML
self.response_body = xml.respond_to?(:to_xml) ? xml.to_xml(options) : xml
end
add :update do |proc, options|
view_context = self.view_context
generator = ActionView::Helpers::PrototypeHelper::JavaScriptGenerator.new(view_context, &proc)
self.content_type = Mime::JS
self.response_body = generator.to_s
end
end
end
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