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Contents
module SimpleNavigation
module Renderer
# This is the base class for all renderers.
#
# A renderer is responsible for rendering an ItemContainer and its containing items to HTML.
class Base
include ActionView::Helpers::UrlHelper
include ActionView::Helpers::TagHelper
attr_reader :controller, :options
class << self
# Delegates method calls to the controller.
def controller_method(*methods)
methods.each do |method|
delegate method, :to => :controller
end
end
end
controller_method :form_authenticity_token, :protect_against_forgery?, :request_forgery_protection_token
def initialize(options) #:nodoc:
@options = options
@controller = SimpleNavigation.controller
end
def expand_all?
!!options[:expand_all]
end
def level
options[:level] || :all
end
def include_sub_navigation?(item)
consider_sub_navigation?(item) && expand_sub_navigation?(item)
end
def render_sub_navigation_for(item)
item.sub_navigation.render(self.options)
end
# Renders the specified ItemContainer to HTML.
#
# When implementing a renderer, please consider to call include_sub_navigation? to determin
# whether an item's sub_navigation should be rendered or not.
#
def render(item_container)
raise 'subclass responsibility'
end
protected
def consider_sub_navigation?(item)
return false if item.sub_navigation.nil?
case level
when :all
return true
when Integer
return false
when Range
return item.sub_navigation.level <= level.max
end
false
end
def expand_sub_navigation?(item)
expand_all? || item.selected?
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems