require "action_view" module Sprockets module Helpers module RailsHelper extend ActiveSupport::Concern include ActionView::Helpers::AssetTagHelper def asset_paths @asset_paths ||= begin config = self.config if respond_to?(:config) config ||= Rails.application.config controller = self.controller if respond_to?(:controller) paths = RailsHelper::AssetPaths.new(config, controller) paths.asset_environment = asset_environment paths.asset_prefix = asset_prefix paths end end def javascript_include_tag(*sources) options = sources.extract_options! debug = options.key?(:debug) ? options.delete(:debug) : debug_assets? body = options.key?(:body) ? options.delete(:body) : false sources.collect do |source| if debug && asset = asset_paths.asset_for(source, 'js') asset.to_a.map { |dep| javascript_include_tag(dep, options.merge({ :debug => false, :body => true })) } else super(source.to_s, { :src => asset_path(source, 'js', body) }.merge!(options)) end end.join("\n").html_safe end def stylesheet_link_tag(*sources) options = sources.extract_options! debug = options.key?(:debug) ? options.delete(:debug) : debug_assets? body = options.key?(:body) ? options.delete(:body) : false sources.collect do |source| if debug && asset = asset_paths.asset_for(source, 'css') asset.to_a.map { |dep| stylesheet_link_tag(dep, options.merge({ :debug => false, :body => true })) } else super(source.to_s, { :href => asset_path(source, 'css', body, :request) }.merge!(options)) end end.join("\n").html_safe end def asset_path(source, default_ext = nil, body = false, protocol = nil) source = source.logical_path if source.respond_to?(:logical_path) path = asset_paths.compute_public_path(source, 'assets', default_ext, true, protocol) body ? "#{path}?body=1" : path end private def debug_assets? config = Rails.application.config.assets config.allow_debugging && (config.debug || params[:debug_assets]) end # Override to specify an alternative prefix for asset path generation. # When combined with a custom +asset_environment+, this can be used to # implement themes that can take advantage of the asset pipeline. # # If you only want to change where the assets are mounted, refer to # +config.assets.prefix+ instead. def asset_prefix Rails.application.config.assets.prefix end # Override to specify an alternative asset environment for asset # path generation. The environment should already have been mounted # at the prefix returned by +asset_prefix+. def asset_environment Rails.application.assets end class AssetPaths < ::ActionView::AssetPaths #:nodoc: attr_accessor :asset_environment, :asset_prefix def compute_public_path(source, dir, ext=nil, include_host=true, protocol=nil) super(source, asset_prefix, ext, include_host, protocol) end # Return the filesystem path for the source def compute_source_path(source, ext) asset_for(source, ext) end def asset_for(source, ext) source = source.to_s return nil if is_uri?(source) source = rewrite_extension(source, nil, ext) asset_environment[source] end def digest_for(logical_path) if asset = asset_environment[logical_path] return asset.digest_path end logical_path end def rewrite_asset_path(source, dir) if source[0] == ?/ source else source = digest_for(source) if performing_caching? source = File.join(dir, source) source = "/#{source}" unless source =~ /^\// source end end def rewrite_extension(source, dir, ext) if ext && File.extname(source).empty? "#{source}.#{ext}" else source end end def performing_caching? # When included in Sprockets::Context, we need to ask the # top-level config as the controller is not available. if config.action_controller.present? config.action_controller.perform_caching else config.perform_caching end end end end end end