require 'active_support/concern' require 'active_support/core_ext/file' require 'action_view/helpers/asset_tag_helpers/asset_include_tag' module ActionView module Helpers module AssetTagHelper class StylesheetIncludeTag < AssetIncludeTag def asset_name 'stylesheet' end def extension 'css' end def asset_tag(source, options) # We force the :request protocol here to avoid a double-download bug in IE7 and IE8 tag("link", { "rel" => "stylesheet", "type" => Mime::CSS, "media" => "screen", "href" => path_to_asset(source, :protocol => :request) }.merge(options)) end def custom_dir config.stylesheets_dir end end module StylesheetTagHelpers extend ActiveSupport::Concern module ClassMethods # 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 register_stylesheet_expansion(expansions) style_expansions = StylesheetIncludeTag.expansions expansions.each do |key, values| style_expansions[key] = (style_expansions[key] || []) | Array(values) end end end # Computes the path to a stylesheet asset in the public stylesheets directory. # If the +source+ filename has no extension, .css will be appended (except for explicit URIs). # 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.example.com/css/style" # => http://www.example.com/css/style # stylesheet_path "http://www.example.com/css/style.css" # => http://www.example.com/css/style.css def stylesheet_path(source) asset_paths.compute_public_path(source, 'stylesheets', :ext => 'css', :protocol => :request) 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. # For historical reasons, the 'media' attribute will always be present and defaults # to "screen", so you must explicitely set it to "all" for the stylesheet(s) to # apply to all media types. # # ==== Examples # stylesheet_link_tag "style" # => # # # stylesheet_link_tag "style.css" # => # # # stylesheet_link_tag "http://www.example.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 config.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 config.perform_caching is false => # # # # # stylesheet_link_tag :all, :cache => true # when config.perform_caching is true => # # # stylesheet_link_tag "shop", "cart", "checkout", :cache => "payment" # when config.perform_caching is false => # # # # # stylesheet_link_tag "shop", "cart", "checkout", :cache => "payment" # when config.perform_caching is true => # # # The :recursive option is also available for caching: # # stylesheet_link_tag :all, :cache => true, :recursive => true # # To force concatenation (even in development mode) set :concat to true. This is useful if # you have too many stylesheets for IE to load. # # stylesheet_link_tag :all, :concat => true # def stylesheet_link_tag(*sources) @stylesheet_include ||= StylesheetIncludeTag.new(config, asset_paths) @stylesheet_include.include_tag(*sources) end end end end end