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require 'uri'
module ActionView
module Helpers
module SprocketsHelper
def sprockets_asset_path(source, default_ext = nil)
compute_sprockets_path(source, 'assets', default_ext)
end
def sprockets_javascript_path(source)
sprockets_asset_path(source, 'js')
end
def sprockets_stylesheet_path(source)
sprockets_asset_path(source, 'css')
end
def sprockets_javascript_include_tag(source, options = {})
options = {
'type' => "text/javascript",
'src' => sprockets_javascript_path(source)
}.merge(options.stringify_keys)
content_tag 'script', "", options
end
def sprockets_stylesheet_link_tag(source, options = {})
options = {
'rel' => "stylesheet",
'type' => "text/css",
'media' => "screen",
'href' => sprockets_stylesheet_path(source)
}.merge(options.stringify_keys)
tag 'link', options
end
private
def compute_sprockets_path(source, dir, default_ext = nil)
source = source.to_s
unless source_is_a_url?(source)
add_asset_directory(source, dir)
add_default_extension(source, default_ext)
add_fingerprint(source, dir)
add_asset_host(source)
end
source
end
def add_asset_directory(source, dir)
source.replace("/#{dir}/#{source}") if source[0] != ?/
end
def add_default_extension(source, default_ext)
source.replace("#{source}.#{default_ext}") if default_ext && File.extname(source).empty?
end
def add_fingerprint(source, dir)
source.replace(assets.path($1, config.perform_caching, dir)) if source =~ /^\/#{dir}\/(.+)/
end
def add_asset_host(source)
host = compute_asset_host(source)
if controller.respond_to?(:request) && host && URI.parse(host).host
source.replace("#{controller.request.protocol}#{host}#{source}")
end
end
def source_is_a_url?(source)
URI.parse(source).host.present?
end
def compute_asset_host(source)
if host = config.asset_host
if host.is_a?(Proc) || host.respond_to?(:call)
case host.is_a?(Proc) ? host.arity : host.method(:call).arity
when 2
request = controller.respond_to?(:request) && controller.request
host.call(source, request)
else
host.call(source)
end
else
(host =~ /%d/) ? host % (source.hash % 4) : host
end
end
end
def assets
Rails.application.assets
end
end
end
end
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