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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 <tt>symbol</tt>
# is passed to <tt>stylesheet_link_tag</tt>. This method is typically intended
# to be called from plugin initialization to register stylesheet files
# that the plugin installed in <tt>public/stylesheets</tt>.
#
# ActionView::Helpers::AssetTagHelper.register_stylesheet_expansion :monkey => ["head", "body", "tail"]
#
# stylesheet_link_tag :monkey # =>
# <link href="/stylesheets/head.css" media="screen" rel="stylesheet" type="text/css" />
# <link href="/stylesheets/body.css" media="screen" rel="stylesheet" type="text/css" />
# <link href="/stylesheets/tail.css" media="screen" rel="stylesheet" type="text/css" />
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, <tt>.css</tt> 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, <tt>.css</tt> 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" # =>
# <link href="/stylesheets/style.css" media="screen" rel="stylesheet" type="text/css" />
#
# stylesheet_link_tag "style.css" # =>
# <link href="/stylesheets/style.css" media="screen" rel="stylesheet" type="text/css" />
#
# stylesheet_link_tag "http://www.example.com/style.css" # =>
# <link href="http://www.example.com/style.css" media="screen" rel="stylesheet" type="text/css" />
#
# stylesheet_link_tag "style", :media => "all" # =>
# <link href="/stylesheets/style.css" media="all" rel="stylesheet" type="text/css" />
#
# stylesheet_link_tag "style", :media => "print" # =>
# <link href="/stylesheets/style.css" media="print" rel="stylesheet" type="text/css" />
#
# stylesheet_link_tag "random.styles", "/css/stylish" # =>
# <link href="/stylesheets/random.styles" media="screen" rel="stylesheet" type="text/css" />
# <link href="/css/stylish.css" media="screen" rel="stylesheet" type="text/css" />
#
# You can also include all styles in the stylesheets directory using <tt>:all</tt> as the source:
#
# stylesheet_link_tag :all # =>
# <link href="/stylesheets/style1.css" media="screen" rel="stylesheet" type="text/css" />
# <link href="/stylesheets/styleB.css" media="screen" rel="stylesheet" type="text/css" />
# <link href="/stylesheets/styleX2.css" media="screen" rel="stylesheet" type="text/css" />
#
# If you want Rails to search in all the subdirectories under stylesheets, you should explicitly set <tt>:recursive</tt>:
#
# 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 =>
# <link href="/stylesheets/style1.css" media="screen" rel="stylesheet" type="text/css" />
# <link href="/stylesheets/styleB.css" media="screen" rel="stylesheet" type="text/css" />
# <link href="/stylesheets/styleX2.css" media="screen" rel="stylesheet" type="text/css" />
#
# stylesheet_link_tag :all, :cache => true # when config.perform_caching is true =>
# <link href="/stylesheets/all.css" media="screen" rel="stylesheet" type="text/css" />
#
# stylesheet_link_tag "shop", "cart", "checkout", :cache => "payment" # when config.perform_caching is false =>
# <link href="/stylesheets/shop.css" media="screen" rel="stylesheet" type="text/css" />
# <link href="/stylesheets/cart.css" media="screen" rel="stylesheet" type="text/css" />
# <link href="/stylesheets/checkout.css" media="screen" rel="stylesheet" type="text/css" />
#
# stylesheet_link_tag "shop", "cart", "checkout", :cache => "payment" # when config.perform_caching is true =>
# <link href="/stylesheets/payment.css" media="screen" rel="stylesheet" type="text/css" />
#
# The <tt>:recursive</tt> option is also available for caching:
#
# stylesheet_link_tag :all, :cache => true, :recursive => true
#
# To force concatenation (even in development mode) set <tt>:concat</tt> 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
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