diff options
Diffstat (limited to 'actionpack/lib/action_controller/new_base')
| -rw-r--r-- | actionpack/lib/action_controller/new_base/base.rb | 4 | ||||
| -rw-r--r-- | actionpack/lib/action_controller/new_base/helpers.rb | 133 |
2 files changed, 135 insertions, 2 deletions
diff --git a/actionpack/lib/action_controller/new_base/base.rb b/actionpack/lib/action_controller/new_base/base.rb index 0c85896a00..6340b7fde9 100644 --- a/actionpack/lib/action_controller/new_base/base.rb +++ b/actionpack/lib/action_controller/new_base/base.rb @@ -4,9 +4,9 @@ module ActionController include AbstractController::Benchmarker include AbstractController::Callbacks - include AbstractController::Helpers include AbstractController::Logger - + + include ActionController::Helpers include ActionController::HideActions include ActionController::UrlFor include ActionController::Redirector diff --git a/actionpack/lib/action_controller/new_base/helpers.rb b/actionpack/lib/action_controller/new_base/helpers.rb new file mode 100644 index 0000000000..401741c249 --- /dev/null +++ b/actionpack/lib/action_controller/new_base/helpers.rb @@ -0,0 +1,133 @@ +require 'active_support/core_ext/load_error' +require 'active_support/core_ext/name_error' +require 'active_support/dependencies' + +module ActionController + module Helpers + extend ActiveSupport::DependencyModule + + depends_on AbstractController::Helpers + + included do + # Set the default directory for helpers + class_inheritable_accessor :helpers_dir + self.helpers_dir = (defined?(RAILS_ROOT) ? "#{RAILS_ROOT}/app/helpers" : "app/helpers") + end + + module ClassMethods + def inherited(klass) + # klass.master_helper_module = Module.new + # klass.master_helper_module.__send__ :include, master_helper_module + klass.__send__ :default_helper_module! + super + end + + # The +helper+ class method can take a series of helper module names, a block, or both. + # + # * <tt>*args</tt>: One or more modules, strings or symbols, or the special symbol <tt>:all</tt>. + # * <tt>&block</tt>: A block defining helper methods. + # + # ==== Examples + # When the argument is a string or symbol, the method will provide the "_helper" suffix, require the file + # and include the module in the template class. The second form illustrates how to include custom helpers + # when working with namespaced controllers, or other cases where the file containing the helper definition is not + # in one of Rails' standard load paths: + # helper :foo # => requires 'foo_helper' and includes FooHelper + # helper 'resources/foo' # => requires 'resources/foo_helper' and includes Resources::FooHelper + # + # When the argument is a module it will be included directly in the template class. + # helper FooHelper # => includes FooHelper + # + # When the argument is the symbol <tt>:all</tt>, the controller will include all helpers beneath + # <tt>ActionController::Base.helpers_dir</tt> (defaults to <tt>app/helpers/**/*.rb</tt> under RAILS_ROOT). + # helper :all + # + # Additionally, the +helper+ class method can receive and evaluate a block, making the methods defined available + # to the template. + # # One line + # helper { def hello() "Hello, world!" end } + # # Multi-line + # helper do + # def foo(bar) + # "#{bar} is the very best" + # end + # end + # + # Finally, all the above styles can be mixed together, and the +helper+ method can be invoked with a mix of + # +symbols+, +strings+, +modules+ and blocks. + # helper(:three, BlindHelper) { def mice() 'mice' end } + # + def helper(*args, &block) + args.flatten.each do |arg| + case arg + when :all + helper all_application_helpers + when String, Symbol + file_name = arg.to_s.underscore + '_helper' + class_name = file_name.camelize + + begin + require_dependency(file_name) + rescue LoadError => load_error + requiree = / -- (.*?)(\.rb)?$/.match(load_error.message).to_a[1] + if requiree == file_name + msg = "Missing helper file helpers/#{file_name}.rb" + raise LoadError.new(msg).copy_blame!(load_error) + else + raise + end + end + + add_template_helper(class_name.constantize) + else + # Explcit 'return' here so that the supplied block ( if any ) doesn't get included twice + return super + end + end + + # Evaluate block in template class if given. + master_helper_module.module_eval(&block) if block_given? + end + + # Declares helper accessors for controller attributes. For example, the + # following adds new +name+ and <tt>name=</tt> instance methods to a + # controller and makes them available to the view: + # helper_attr :name + # attr_accessor :name + def helper_attr(*attrs) + attrs.flatten.each { |attr| helper_method(attr, "#{attr}=") } + end + + # Provides a proxy to access helpers methods from outside the view. + def helpers + unless @helper_proxy + @helper_proxy = ActionView::Base.new + @helper_proxy.extend master_helper_module + else + @helper_proxy + end + end + + private + + def default_helper_module! + unless name.blank? + module_name = name.sub(/Controller$|$/, 'Helper') + module_path = module_name.split('::').map { |m| m.underscore }.join('/') + require_dependency module_path + helper module_name.constantize + end + rescue MissingSourceFile => e + raise unless e.is_missing? module_path + rescue NameError => e + raise unless e.missing_name? module_name + end + + # Extract helper names from files in app/helpers/**/*.rb + def all_application_helpers + extract = /^#{Regexp.quote(helpers_dir)}\/?(.*)_helper.rb$/ + Dir["#{helpers_dir}/**/*_helper.rb"].map { |file| file.sub extract, '\1' } + end + end # ClassMethods + end +end |