Created
March 7, 2009 05:31
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# Out of the box the auto asset helpers attemp to include javascript and css files based on the | |
# controller and action names. You can of course customize the logic that generates the path for | |
# each page. | |
# | |
# | |
# Simple Usage: | |
# Add these lines to your layout | |
# stylesheet_link_tag :auto_includes | |
# javascript_include_tag :auto_includes | |
# | |
# Advanced Usage: | |
# You can overwrite the method that generates the resource path by defining one of the followig | |
# methods in any controller | |
# asset_path_generator | |
# javascript_path_generator | |
# stylesheet_path_generator | |
# | |
# Examples: | |
# class ApplicationController | |
# def asset_path_generator(asset_type) | |
# File.join( 'auto_included_assets', "/#{asset_type.to_s.pluralize}/", params['controller'], params['action'] ) | |
# end | |
# end | |
# | |
# class PostsController | |
# def stylesheet_path_generator | |
# File.join( 'posts_style_sheets', cobrand_name, params['action'] ) | |
# end | |
# end | |
# | |
module AutoAssetHelper | |
# Usage: | |
# stylesheet_link_tag :auto_includes | |
def stylesheet_link_tag(*sources) | |
expand_auto_includes(:stylesheet, sources) | |
super | |
end | |
# Usage: | |
# javascript_include_tag :auto_includes | |
def javascript_include_tag(*sources) | |
expand_auto_includes(:javascript, sources) | |
super | |
end | |
private | |
def expand_auto_includes(asset_type, sources) | |
sources.map!{ |source| | |
!source.eql?(:auto_includes) ? source : AutoAssetHelper.asset_for( asset_type, @controller ) | |
}.compact! | |
end | |
public | |
ASSETS_DIR = ActionView::Helpers::AssetTagHelper::ASSETS_DIR | |
ASSET_TYPES = {} | |
class << self | |
def asset_names | |
ASSET_TYPES.keys | |
end | |
def asset_extensions | |
ASSET_TYPES.values | |
end | |
def add_asset_type(asset_type, extension) | |
ASSET_TYPES[asset_type] = extension | |
# self.class.send :attr_accessor, "#{asset_type}_path_generator".to_sym | |
# self.class.send :define_method, "#{asset_type}_for".to_sym do |controller, *args| | |
# asset_for(asset_type, controller, *args) | |
# end | |
end | |
def default_path_generator(asset_type, controller) | |
"/#{asset_type.to_s.pluralize}/" + File.join( controller.params['controller'], controller.params['action'] ) | |
end | |
def asset_for(asset_type, controller, *options) | |
genrator_name = "#{asset_type}_path_generator".to_sym | |
path = begin | |
# if controller.javascript_path_generater is defined | |
if controller.respond_to? genrator_name | |
controller.send( genrator_name, *options ) | |
# if controller.asset_path_generator is defined | |
elsif controller.respond_to? :asset_path_generator | |
controller.asset_path_generator( asset_type, *options ) | |
# user default asset path generator | |
else | |
default_path_generator( asset_type, controller, *options ) | |
end | |
end | |
asset_exists?(path, asset_type) ? path : nil | |
end | |
def asset_exists?(path, asset_type=nil) | |
path = asset_type.nil? ? path : "#{path}.#{ASSET_TYPES[asset_type]}" | |
ApplicationController.logger.debug "Checking exististance of #{path}" | |
assets.include? path | |
end | |
def assets | |
ApplicationController.logger.debug "Searching for auto includable assets" | |
asset_extensions.inject([]){ |assets, asset_ext| | |
assets.concat Dir[File.join(ASSETS_DIR,'**',"*.#{asset_ext}")] | |
}.map{|a| a.sub(ASSETS_DIR ,'')} | |
end | |
memoize :assets if RAILS_ENV.downcase.match('production') | |
end | |
end | |
AutoAssetHelper.add_asset_type(:stylesheet, :css) | |
AutoAssetHelper.add_asset_type(:javascript, :js) |
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