X-Git-Url: https://git.njae.me.uk/?a=blobdiff_plain;f=vendor%2Frails%2Factionpack%2Flib%2Faction_view%2Fhelpers%2Fasset_tag_helper.rb;fp=vendor%2Frails%2Factionpack%2Flib%2Faction_view%2Fhelpers%2Fasset_tag_helper.rb;h=4352d7819bdd0ad09667c6ee0ad6fe99a492a501;hb=d115f2e23823271635bad69229a42cd8ac68debe;hp=0000000000000000000000000000000000000000;hpb=37cb670bf3ddde90b214e591f100ed4446469484;p=depot.git diff --git a/vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb b/vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb new file mode 100644 index 0000000..4352d78 --- /dev/null +++ b/vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb @@ -0,0 +1,817 @@ +require 'cgi' +require 'action_view/helpers/url_helper' +require 'action_view/helpers/tag_helper' + +module ActionView + module Helpers #:nodoc: + # This module provides methods for generating HTML that links views to assets such + # as images, javascripts, stylesheets, and feeds. These methods do not verify + # the assets exist before linking to them. + # + # === Using asset hosts + # By default, Rails links to these assets on the current host in the public + # folder, but you can direct Rails to link to assets from a dedicated assets server by + # setting ActionController::Base.asset_host in your config/environment.rb. For example, + # let's say your asset host is assets.example.com. + # + # ActionController::Base.asset_host = "assets.example.com" + # image_tag("rails.png") + # => Rails + # stylesheet_link_tag("application") + # => + # + # This is useful since browsers typically open at most two connections to a single host, + # which means your assets often wait in single file for their turn to load. You can + # alleviate this by using a %d wildcard in asset_host (for example, "assets%d.example.com") + # to automatically distribute asset requests among four hosts (e.g., "assets0.example.com" through "assets3.example.com") + # so browsers will open eight connections rather than two. + # + # image_tag("rails.png") + # => Rails + # stylesheet_link_tag("application") + # => + # + # To do this, you can either setup 4 actual hosts, or you can use wildcard DNS to CNAME + # the wildcard to a single asset host. You can read more about setting up your DNS CNAME records from + # your ISP. + # + # Note: This is purely a browser performance optimization and is not meant + # for server load balancing. See http://www.die.net/musings/page_load_time/ + # for background. + # + # Alternatively, you can exert more control over the asset host by setting asset_host to a proc + # that takes a single source argument. This is useful if you are unable to setup 4 actual hosts or have + # fewer/more than 4 hosts. The example proc below generates http://assets1.example.com and + # http://assets2.example.com randomly. + # + # ActionController::Base.asset_host = Proc.new { |source| "http://assets#{rand(2) + 1}.example.com" } + # image_tag("rails.png") + # => Rails + # stylesheet_link_tag("application") + # => + # + # The proc takes a source parameter (which is the path of the source asset) and an optional + # request parameter (which is an entire instance of an ActionController::AbstractRequest + # subclass). This can be used to generate a particular asset host depending on the asset path and the particular + # request. + # + # ActionController::Base.asset_host = Proc.new { |source| + # if source.starts_with?('/images') + # "http://images.example.com" + # else + # "http://assets.example.com" + # end + # } + # image_tag("rails.png") + # => Rails + # stylesheet_link_tag("application") + # => + # + # The optional request parameter to the proc is useful in particular for serving assets from an + # SSL-protected page. The example proc below disables asset hosting for HTTPS connections, while still sending + # assets for plain HTTP requests from asset hosts. This is useful for avoiding mixed media warnings when serving + # non-HTTP assets from HTTPS web pages when you don't have an SSL certificate for each of the asset hosts. + # + # ActionController::Base.asset_host = Proc.new { |source, request| + # if request.ssl? + # "#{request.protocol}#{request.host_with_port}" + # else + # "#{request.protocol}assets.example.com" + # end + # } + # + # === Using asset timestamps + # + # By default, Rails will append all asset paths with that asset's timestamp. This allows you to set a cache-expiration date for the + # asset far into the future, but still be able to instantly invalidate it by simply updating the file (and hence updating the timestamp, + # which then updates the URL as the timestamp is part of that, which in turn busts the cache). + # + # It's the responsibility of the web server you use to set the far-future expiration date on cache assets that you need to take + # advantage of this feature. Here's an example for Apache: + # + # # Asset Expiration + # ExpiresActive On + # + # ExpiresDefault "access plus 1 year" + # + # + # Also note that in order for this to work, all your application servers must return the same timestamps. This means that they must + # have their clocks synchronized. If one of them drift out of sync, you'll see different timestamps at random and the cache won't + # work. Which means that the browser will request the same assets over and over again even thought they didn't change. You can use + # something like Live HTTP Headers for Firefox to verify that the cache is indeed working (and that the assets are not being + # requested over and over). + module AssetTagHelper + ASSETS_DIR = defined?(Rails.public_path) ? Rails.public_path : "public" + JAVASCRIPTS_DIR = "#{ASSETS_DIR}/javascripts" + STYLESHEETS_DIR = "#{ASSETS_DIR}/stylesheets" + JAVASCRIPT_DEFAULT_SOURCES = ['prototype', 'effects', 'dragdrop', 'controls'].freeze unless const_defined?(:JAVASCRIPT_DEFAULT_SOURCES) + + # Returns a link tag that browsers and news readers can use to auto-detect + # an RSS or ATOM feed. The +type+ can either be :rss (default) or + # :atom. Control the link options in url_for format using the + # +url_options+. You can modify the LINK tag itself in +tag_options+. + # + # ==== Options: + # * :rel - Specify the relation of this link, defaults to "alternate" + # * :type - Override the auto-generated mime type + # * :title - Specify the title of the link, defaults to the +type+ + # + # ==== Examples + # auto_discovery_link_tag # => + # + # auto_discovery_link_tag(:atom) # => + # + # auto_discovery_link_tag(:rss, {:action => "feed"}) # => + # + # auto_discovery_link_tag(:rss, {:action => "feed"}, {:title => "My RSS"}) # => + # + # auto_discovery_link_tag(:rss, {:controller => "news", :action => "feed"}) # => + # + # auto_discovery_link_tag(:rss, "http://www.example.com/feed.rss", {:title => "Example RSS"}) # => + # + def auto_discovery_link_tag(type = :rss, url_options = {}, tag_options = {}) + tag( + "link", + "rel" => tag_options[:rel] || "alternate", + "type" => tag_options[:type] || Mime::Type.lookup_by_extension(type.to_s).to_s, + "title" => tag_options[:title] || type.to_s.upcase, + "href" => url_options.is_a?(Hash) ? url_for(url_options.merge(:only_path => false)) : url_options + ) + end + + # Computes the path to a javascript asset in the public javascripts directory. + # If the +source+ filename has no extension, .js will be appended. + # Full paths from the document root will be passed through. + # Used internally by javascript_include_tag to build the script path. + # + # ==== Examples + # javascript_path "xmlhr" # => /javascripts/xmlhr.js + # javascript_path "dir/xmlhr.js" # => /javascripts/dir/xmlhr.js + # javascript_path "/dir/xmlhr" # => /dir/xmlhr.js + # javascript_path "http://www.railsapplication.com/js/xmlhr" # => http://www.railsapplication.com/js/xmlhr.js + # javascript_path "http://www.railsapplication.com/js/xmlhr.js" # => http://www.railsapplication.com/js/xmlhr.js + def javascript_path(source) + JavaScriptTag.new(self, @controller, source).public_path + end + alias_method :path_to_javascript, :javascript_path # aliased to avoid conflicts with a javascript_path named route + + # Returns an html script tag for each of the +sources+ provided. You + # can pass in the filename (.js extension is optional) of javascript files + # that exist in your public/javascripts directory for inclusion into the + # current page or you can pass the full path relative to your document + # root. To include the Prototype and Scriptaculous javascript libraries in + # your application, pass :defaults as the source. When using + # :defaults, if an application.js file exists in your public + # javascripts directory, it will be included as well. You can modify the + # html attributes of the script tag by passing a hash as the last argument. + # + # ==== Examples + # javascript_include_tag "xmlhr" # => + # + # + # javascript_include_tag "xmlhr.js" # => + # + # + # javascript_include_tag "common.javascript", "/elsewhere/cools" # => + # + # + # + # javascript_include_tag "http://www.railsapplication.com/xmlhr" # => + # + # + # javascript_include_tag "http://www.railsapplication.com/xmlhr.js" # => + # + # + # javascript_include_tag :defaults # => + # + # + # ... + # + # + # * = The application.js file is only referenced if it exists + # + # Though it's not really recommended practice, if you need to extend the default JavaScript set for any reason + # (e.g., you're going to be using a certain .js file in every action), then take a look at the register_javascript_include_default method. + # + # You can also include all javascripts in the javascripts directory using :all as the source: + # + # javascript_include_tag :all # => + # + # + # ... + # + # + # + # + # Note that the default javascript files will be included first. So Prototype and Scriptaculous are available to + # all subsequently included files. + # + # If you want Rails to search in all the subdirectories under javascripts, you should explicitly set :recursive: + # + # javascript_include_tag :all, :recursive => true + # + # == Caching multiple javascripts into one + # + # You can also cache multiple javascripts into one file, which requires less HTTP connections to download and can better be + # compressed by gzip (leading to faster transfers). Caching will only happen if ActionController::Base.perform_caching + # is set to true (which is the case by default for the Rails production environment, but not for the development + # environment). + # + # ==== Examples + # javascript_include_tag :all, :cache => true # when ActionController::Base.perform_caching is false => + # + # + # ... + # + # + # + # + # javascript_include_tag :all, :cache => true # when ActionController::Base.perform_caching is true => + # + # + # javascript_include_tag "prototype", "cart", "checkout", :cache => "shop" # when ActionController::Base.perform_caching is false => + # + # + # + # + # javascript_include_tag "prototype", "cart", "checkout", :cache => "shop" # when ActionController::Base.perform_caching is true => + # + # + # The :recursive option is also available for caching: + # + # javascript_include_tag :all, :cache => true, :recursive => true + def javascript_include_tag(*sources) + options = sources.extract_options!.stringify_keys + cache = options.delete("cache") + recursive = options.delete("recursive") + + if ActionController::Base.perform_caching && cache + joined_javascript_name = (cache == true ? "all" : cache) + ".js" + joined_javascript_path = File.join(JAVASCRIPTS_DIR, joined_javascript_name) + + unless File.exists?(joined_javascript_path) + JavaScriptSources.create(self, @controller, sources, recursive).write_asset_file_contents(joined_javascript_path) + end + javascript_src_tag(joined_javascript_name, options) + else + JavaScriptSources.create(self, @controller, sources, recursive).expand_sources.collect { |source| + javascript_src_tag(source, options) + }.join("\n") + end + end + + # Register one or more javascript files to be included when symbol + # is passed to javascript_include_tag. This method is typically intended + # to be called from plugin initialization to register javascript files + # that the plugin installed in public/javascripts. + # + # ActionView::Helpers::AssetTagHelper.register_javascript_expansion :monkey => ["head", "body", "tail"] + # + # javascript_include_tag :monkey # => + # + # + # + def self.register_javascript_expansion(expansions) + JavaScriptSources.expansions.merge!(expansions) + end + + # Register one or more stylesheet files to be included when symbol + # is passed to stylesheet_link_tag. This method is typically intended + # to be called from plugin initialization to register stylesheet files + # that the plugin installed in public/stylesheets. + # + # ActionView::Helpers::AssetTagHelper.register_stylesheet_expansion :monkey => ["head", "body", "tail"] + # + # stylesheet_link_tag :monkey # => + # + # + # + def self.register_stylesheet_expansion(expansions) + StylesheetSources.expansions.merge!(expansions) + end + + # Register one or more additional JavaScript files to be included when + # javascript_include_tag :defaults is called. This method is + # typically intended to be called from plugin initialization to register additional + # .js files that the plugin installed in public/javascripts. + def self.register_javascript_include_default(*sources) + JavaScriptSources.expansions[:defaults].concat(sources) + end + + def self.reset_javascript_include_default #:nodoc: + JavaScriptSources.expansions[:defaults] = JAVASCRIPT_DEFAULT_SOURCES.dup + end + + # Computes the path to a stylesheet asset in the public stylesheets directory. + # If the +source+ filename has no extension, .css will be appended. + # Full paths from the document root will be passed through. + # Used internally by +stylesheet_link_tag+ to build the stylesheet path. + # + # ==== Examples + # stylesheet_path "style" # => /stylesheets/style.css + # stylesheet_path "dir/style.css" # => /stylesheets/dir/style.css + # stylesheet_path "/dir/style.css" # => /dir/style.css + # stylesheet_path "http://www.railsapplication.com/css/style" # => http://www.railsapplication.com/css/style.css + # stylesheet_path "http://www.railsapplication.com/css/style.js" # => http://www.railsapplication.com/css/style.css + def stylesheet_path(source) + StylesheetTag.new(self, @controller, source).public_path + end + alias_method :path_to_stylesheet, :stylesheet_path # aliased to avoid conflicts with a stylesheet_path named route + + # Returns a stylesheet link tag for the sources specified as arguments. If + # you don't specify an extension, .css will be appended automatically. + # You can modify the link attributes by passing a hash as the last argument. + # + # ==== Examples + # stylesheet_link_tag "style" # => + # + # + # stylesheet_link_tag "style.css" # => + # + # + # stylesheet_link_tag "http://www.railsapplication.com/style.css" # => + # + # + # stylesheet_link_tag "style", :media => "all" # => + # + # + # stylesheet_link_tag "style", :media => "print" # => + # + # + # stylesheet_link_tag "random.styles", "/css/stylish" # => + # + # + # + # You can also include all styles in the stylesheets directory using :all as the source: + # + # stylesheet_link_tag :all # => + # + # + # + # + # If you want Rails to search in all the subdirectories under stylesheets, you should explicitly set :recursive: + # + # stylesheet_link_tag :all, :recursive => true + # + # == Caching multiple stylesheets into one + # + # You can also cache multiple stylesheets into one file, which requires less HTTP connections and can better be + # compressed by gzip (leading to faster transfers). Caching will only happen if ActionController::Base.perform_caching + # is set to true (which is the case by default for the Rails production environment, but not for the development + # environment). Examples: + # + # ==== Examples + # stylesheet_link_tag :all, :cache => true # when ActionController::Base.perform_caching is false => + # + # + # + # + # stylesheet_link_tag :all, :cache => true # when ActionController::Base.perform_caching is true => + # + # + # stylesheet_link_tag "shop", "cart", "checkout", :cache => "payment" # when ActionController::Base.perform_caching is false => + # + # + # + # + # stylesheet_link_tag "shop", "cart", "checkout", :cache => "payment" # when ActionController::Base.perform_caching is true => + # + # + # The :recursive option is also available for caching: + # + # stylesheet_link_tag :all, :cache => true, :recursive => true + def stylesheet_link_tag(*sources) + options = sources.extract_options!.stringify_keys + cache = options.delete("cache") + recursive = options.delete("recursive") + + if ActionController::Base.perform_caching && cache + joined_stylesheet_name = (cache == true ? "all" : cache) + ".css" + joined_stylesheet_path = File.join(STYLESHEETS_DIR, joined_stylesheet_name) + + unless File.exists?(joined_stylesheet_path) + StylesheetSources.create(self, @controller, sources, recursive).write_asset_file_contents(joined_stylesheet_path) + end + stylesheet_tag(joined_stylesheet_name, options) + else + StylesheetSources.create(self, @controller, sources, recursive).expand_sources.collect { |source| + stylesheet_tag(source, options) + }.join("\n") + end + end + + # Computes the path to an image asset in the public images directory. + # Full paths from the document root will be passed through. + # Used internally by +image_tag+ to build the image path. + # + # ==== Examples + # image_path("edit") # => /images/edit + # image_path("edit.png") # => /images/edit.png + # image_path("icons/edit.png") # => /images/icons/edit.png + # image_path("/icons/edit.png") # => /icons/edit.png + # image_path("http://www.railsapplication.com/img/edit.png") # => http://www.railsapplication.com/img/edit.png + def image_path(source) + ImageTag.new(self, @controller, source).public_path + end + alias_method :path_to_image, :image_path # aliased to avoid conflicts with an image_path named route + + # Returns an html image tag for the +source+. The +source+ can be a full + # path or a file that exists in your public images directory. + # + # ==== Options + # You can add HTML attributes using the +options+. The +options+ supports + # three additional keys for convenience and conformance: + # + # * :alt - If no alt text is given, the file name part of the + # +source+ is used (capitalized and without the extension) + # * :size - Supplied as "{Width}x{Height}", so "30x45" becomes + # width="30" and height="45". :size will be ignored if the + # value is not in the correct format. + # * :mouseover - Set an alternate image to be used when the onmouseover + # event is fired, and sets the original image to be replaced onmouseout. + # This can be used to implement an easy image toggle that fires on onmouseover. + # + # ==== Examples + # image_tag("icon") # => + # Icon + # image_tag("icon.png") # => + # Icon + # image_tag("icon.png", :size => "16x10", :alt => "Edit Entry") # => + # Edit Entry + # image_tag("/icons/icon.gif", :size => "16x16") # => + # Icon + # image_tag("/icons/icon.gif", :height => '32', :width => '32') # => + # Icon + # image_tag("/icons/icon.gif", :class => "menu_icon") # => + # Icon + # image_tag("mouse.png", :mouseover => "/images/mouse_over.png") # => + # Mouse + # image_tag("mouse.png", :mouseover => image_path("mouse_over.png")) # => + # Mouse + def image_tag(source, options = {}) + options.symbolize_keys! + + options[:src] = path_to_image(source) + options[:alt] ||= File.basename(options[:src], '.*').split('.').first.to_s.capitalize + + if size = options.delete(:size) + options[:width], options[:height] = size.split("x") if size =~ %r{^\d+x\d+$} + end + + if mouseover = options.delete(:mouseover) + options[:onmouseover] = "this.src='#{image_path(mouseover)}'" + options[:onmouseout] = "this.src='#{image_path(options[:src])}'" + end + + tag("img", options) + end + + private + def javascript_src_tag(source, options) + content_tag("script", "", { "type" => Mime::JS, "src" => path_to_javascript(source) }.merge(options)) + end + + def stylesheet_tag(source, options) + tag("link", { "rel" => "stylesheet", "type" => Mime::CSS, "media" => "screen", "href" => html_escape(path_to_stylesheet(source)) }.merge(options), false, false) + end + + module ImageAsset + DIRECTORY = 'images'.freeze + + def directory + DIRECTORY + end + + def extension + nil + end + end + + module JavaScriptAsset + DIRECTORY = 'javascripts'.freeze + EXTENSION = 'js'.freeze + + def public_directory + JAVASCRIPTS_DIR + end + + def directory + DIRECTORY + end + + def extension + EXTENSION + end + end + + module StylesheetAsset + DIRECTORY = 'stylesheets'.freeze + EXTENSION = 'css'.freeze + + def public_directory + STYLESHEETS_DIR + end + + def directory + DIRECTORY + end + + def extension + EXTENSION + end + end + + class AssetTag + extend ActiveSupport::Memoizable + + Cache = {} + CacheGuard = Mutex.new + + ProtocolRegexp = %r{^[-a-z]+://}.freeze + + def initialize(template, controller, source, include_host = true) + # NOTE: The template arg is temporarily needed for a legacy plugin + # hook that is expected to call rewrite_asset_path on the + # template. This should eventually be removed. + @template = template + @controller = controller + @source = source + @include_host = include_host + @cache_key = if controller.respond_to?(:request) + [self.class.name,controller.request.protocol, + ActionController::Base.asset_host, + ActionController::Base.relative_url_root, + source, include_host] + else + [self.class.name,ActionController::Base.asset_host, source, include_host] + end + end + + def public_path + compute_public_path(@source) + end + memoize :public_path + + def asset_file_path + File.join(ASSETS_DIR, public_path.split('?').first) + end + memoize :asset_file_path + + def contents + File.read(asset_file_path) + end + + def mtime + File.mtime(asset_file_path) + end + + private + def request + @controller.request + end + + def request? + @controller.respond_to?(:request) + end + + # Add the the extension +ext+ if not present. Return full URLs otherwise untouched. + # Prefix with /dir/ if lacking a leading +/+. Account for relative URL + # roots. Rewrite the asset path for cache-busting asset ids. Include + # asset host, if configured, with the correct request protocol. + def compute_public_path(source) + if source =~ ProtocolRegexp + source += ".#{extension}" if missing_extension?(source) + source = prepend_asset_host(source) + source + else + CacheGuard.synchronize do + Cache[@cache_key] ||= begin + source += ".#{extension}" if missing_extension?(source) || file_exists_with_extension?(source) + source = "/#{directory}/#{source}" unless source[0] == ?/ + source = rewrite_asset_path(source) + source = prepend_relative_url_root(source) + source = prepend_asset_host(source) + source + end + end + end + end + + def missing_extension?(source) + extension && File.extname(source).blank? + end + + def file_exists_with_extension?(source) + extension && File.exist?(File.join(ASSETS_DIR, directory, "#{source}.#{extension}")) + end + + def prepend_relative_url_root(source) + relative_url_root = ActionController::Base.relative_url_root + if request? && @include_host && source !~ %r{^#{relative_url_root}/} + "#{relative_url_root}#{source}" + else + source + end + end + + def prepend_asset_host(source) + if @include_host && source !~ ProtocolRegexp + host = compute_asset_host(source) + if request? && !host.blank? && host !~ ProtocolRegexp + host = "#{request.protocol}#{host}" + end + "#{host}#{source}" + else + source + end + end + + # Pick an asset host for this source. Returns +nil+ if no host is set, + # the host if no wildcard is set, the host interpolated with the + # numbers 0-3 if it contains %d (the number is the source hash mod 4), + # or the value returned from invoking the proc if it's a proc. + def compute_asset_host(source) + if host = ActionController::Base.asset_host + if host.is_a?(Proc) + case host.arity + when 2 + host.call(source, request) + else + host.call(source) + end + else + (host =~ /%d/) ? host % (source.hash % 4) : host + end + end + end + + # Use the RAILS_ASSET_ID environment variable or the source's + # modification time as its cache-busting asset id. + def rails_asset_id(source) + if asset_id = ENV["RAILS_ASSET_ID"] + asset_id + else + path = File.join(ASSETS_DIR, source) + + if File.exist?(path) + File.mtime(path).to_i.to_s + else + '' + end + end + end + + # Break out the asset path rewrite in case plugins wish to put the asset id + # someplace other than the query string. + def rewrite_asset_path(source) + if @template.respond_to?(:rewrite_asset_path) + # DEPRECATE: This way to override rewrite_asset_path + @template.send(:rewrite_asset_path, source) + else + asset_id = rails_asset_id(source) + if asset_id.blank? + source + else + "#{source}?#{asset_id}" + end + end + end + end + + class ImageTag < AssetTag + include ImageAsset + end + + class JavaScriptTag < AssetTag + include JavaScriptAsset + end + + class StylesheetTag < AssetTag + include StylesheetAsset + end + + class AssetCollection + extend ActiveSupport::Memoizable + + Cache = {} + CacheGuard = Mutex.new + + def self.create(template, controller, sources, recursive) + CacheGuard.synchronize do + key = [self, sources, recursive] + Cache[key] ||= new(template, controller, sources, recursive).freeze + end + end + + def initialize(template, controller, sources, recursive) + # NOTE: The template arg is temporarily needed for a legacy plugin + # hook. See NOTE under AssetTag#initialize for more details + @template = template + @controller = controller + @sources = sources + @recursive = recursive + end + + def write_asset_file_contents(joined_asset_path) + FileUtils.mkdir_p(File.dirname(joined_asset_path)) + File.open(joined_asset_path, "w+") { |cache| cache.write(joined_contents) } + mt = latest_mtime + File.utime(mt, mt, joined_asset_path) + end + + private + def determine_source(source, collection) + case source + when Symbol + collection[source] || raise(ArgumentError, "No expansion found for #{source.inspect}") + else + source + end + end + + def validate_sources! + @sources.collect { |source| determine_source(source, self.class.expansions) }.flatten + end + + def all_asset_files + path = [public_directory, ('**' if @recursive), "*.#{extension}"].compact + Dir[File.join(*path)].collect { |file| + file[-(file.size - public_directory.size - 1)..-1].sub(/\.\w+$/, '') + }.sort + end + + def tag_sources + expand_sources.collect { |source| tag_class.new(@template, @controller, source, false) } + end + + def joined_contents + tag_sources.collect { |source| source.contents }.join("\n\n") + end + + # Set mtime to the latest of the combined files to allow for + # consistent ETag without a shared filesystem. + def latest_mtime + tag_sources.map { |source| source.mtime }.max + end + end + + class JavaScriptSources < AssetCollection + include JavaScriptAsset + + EXPANSIONS = { :defaults => JAVASCRIPT_DEFAULT_SOURCES.dup } + + def self.expansions + EXPANSIONS + end + + APPLICATION_JS = "application".freeze + APPLICATION_FILE = "application.js".freeze + + def expand_sources + if @sources.include?(:all) + assets = all_asset_files + ((defaults.dup & assets) + assets).uniq! + else + expanded_sources = validate_sources! + expanded_sources << APPLICATION_JS if include_application? + expanded_sources + end + end + memoize :expand_sources + + private + def tag_class + JavaScriptTag + end + + def defaults + determine_source(:defaults, self.class.expansions) + end + + def include_application? + @sources.include?(:defaults) && File.exist?(File.join(JAVASCRIPTS_DIR, APPLICATION_FILE)) + end + end + + class StylesheetSources < AssetCollection + include StylesheetAsset + + EXPANSIONS = {} + + def self.expansions + EXPANSIONS + end + + def expand_sources + @sources.first == :all ? all_asset_files : validate_sources! + end + memoize :expand_sources + + private + def tag_class + StylesheetTag + end + end + end + end +end