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module AbstractController
module Helpers
extend ActiveSupport::DependencyModule
depends_on Renderer
included do
extlib_inheritable_accessor :master_helper_module
self.master_helper_module = Module.new
end
def _action_view
@_action_view ||= begin
av = super
av.helpers.send(:include, master_helper_module)
av
end
end
module ClassMethods
def inherited(klass)
klass.master_helper_module = Module.new
klass.master_helper_module.__send__ :include, master_helper_module
super
end
# Makes all the (instance) methods in the helper module available to templates rendered through this controller.
# See ActionView::Helpers (link:classes/ActionView/Helpers.html) for more about making your own helper modules
# available to the templates.
def add_template_helper(mod)
master_helper_module.module_eval { include mod }
end
# Declare a controller method as a helper. For example, the following
# makes the +current_user+ controller method available to the view:
# class ApplicationController < ActionController::Base
# helper_method :current_user, :logged_in?
#
# def current_user
# @current_user ||= User.find_by_id(session[:user])
# end
#
# def logged_in?
# current_user != nil
# end
# end
#
# In a view:
# <% if logged_in? -%>Welcome, <%= current_user.name %><% end -%>
def helper_method(*meths)
meths.flatten.each do |meth|
master_helper_module.class_eval <<-ruby_eval, __FILE__, __LINE__ + 1
def #{meth}(*args, &blk)
controller.send(%(#{meth}), *args, &blk)
end
ruby_eval
end
end
def helper(*args, &block)
args.flatten.each do |arg|
case arg
when Module
add_template_helper(arg)
end
end
master_helper_module.module_eval(&block) if block_given?
end
end
end
end
|
