in app/helpers/application_helper.rb [43:77]
def nav_link(options = {}, &block)
if path = options.delete(:path)
if path.respond_to?(:each)
c = path.map { |p| p.split('#').first }
a = path.map { |p| p.split('#').last }
else
c, a, _ = path.split('#')
end
else
c = options.delete(:controller)
a = options.delete(:action)
end
if c && a
klass = current_controller?(*c) && current_action?(*a) ? 'active' : ''
else
klass = current_controller?(*c) || current_action?(*a) ? 'active' : ''
end
o = options.delete(:html_options) || {}
o[:class] ||= ''
o[:class] += ' ' + klass
o[:class].strip!
if block_given?
content_tag(:li, capture(&block), o)
else
content_tag(:li, nil, o)
end
end