vendor/plugins/aaa/test/include_into_test.rb @@ -3,7 +3,7 @@ Module.class_eval do # A hash that maps Class names to an array of Modules to mix in when the class is instantiated. - @@class_mixins = {} + @@class_mixins = {} unless defined?(@@class_mixins) mattr_reader :class_mixins # Specifies that this module should be included into the given classes when they are instantiated. @@ -11,18 +11,46 @@ Module.class_eval do # module FooMethods # include_into "Foo", "Bar" # end + # + # You can also specify a hash to have your module's methods alias_method_chained to the target + # class' methods. + # + # module FooMethods + # include_into "Foo", :method => :feature + # end + # + # This will alias Foo#method to the newly included FooMethods#method_with_feature. The former + # method Foo#method will continue to be available as Foo#method_without_feature. + # def include_into(*klasses) klasses.flatten! + aliases = klasses.last.is_a?(Hash) ? klasses.pop : {} klasses.each do |klass| - (@@class_mixins[klass] ||= []) << name.to_s + (@@class_mixins[klass] ||= []) << [name.to_s, aliases] @@class_mixins[klass].uniq! end end - + # add any class mixins that have been registered for this class def auto_include! - mixins = @@class_mixins[name] - send(:include, *mixins.collect { |name| name.constantize }) if mixins + if mixins = @@class_mixins[name] + mixins.each do |name, aliases| + include name.constantize + aliases.each { |args| alias_chain *args } + end + end + end + + def alias_chain(target, feature) + (class << self; self end).class_eval <<-EOC, __FILE__, __LINE__ + def method_added_with_#{target}_#{feature}(method) + if method == :#{target} && !method_defined?(:#{target}_without_#{feature}) + alias_method_chain :#{target}, :#{feature} + end + method_added_without_#{target}_#{feature}(method) + end + alias_method_chain :method_added, :#{target}_#{feature} + EOC end end vendor/plugins/aaa/init.rb 7af009a57222f56ad33aa9527f323321ff39320e Sven Fuchs svenfuchs@artweb-design.de http://github.com/halorgium/mephisto/commit/d971d941df4351ad42b41896b3446f3d43fa9bcd d971d941df4351ad42b41896b3446f3d43fa9bcd 2008-02-06T13:27:46-08:00 2008-02-06T13:27:46-08:00 Enhance include_into with alias_method_chaining, closing #152 8441e1a82843804d1bace8fcceea3aaedb60e87a Sven Fuchs svenfuchs@artweb-design.de