Module: AbstractController::Layouts::ClassMethods

Defined in:
lib/abstract_controller/layouts.rb

Defined Under Namespace

Modules: LayoutConditions

Instance Method Summary collapse

Instance Method Details

#_implied_layout_name ⇒ Object

If no layout is supplied, look for a template named the return value of this method.

Returns

  • String - A template name



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# File 'lib/abstract_controller/layouts.rb', line 234

def _implied_layout_name
  controller_path
end

#_write_layout_method ⇒ Object

Creates a _layout method to be called by _default_layout .

If a layout is not explicitly mentioned then look for a layout with the controller’s name. if nothing is found then try same procedure to find super class’s layout.



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# File 'lib/abstract_controller/layouts.rb', line 242

def _write_layout_method
  remove_possible_method(:_layout)

  case defined?(@_layout) ? @_layout : nil
  when String
    self.class_eval %{def _layout; #{@_layout.inspect} end}, __FILE__, __LINE__
  when Symbol
    self.class_eval "      def _layout\n        \#{@_layout}.tap do |layout|\n          unless layout.is_a?(String) || !layout\n            raise ArgumentError, \"Your layout method :\#{@_layout} returned \\\#{layout}. It \" \\\n              \"should have returned a String, false, or nil\"\n          end\n        end\n      end\n    ruby_eval\n  when Proc\n    define_method :_layout_from_proc, &@_layout\n    self.class_eval %{def _layout; _layout_from_proc(self) end}, __FILE__, __LINE__\n  when false\n    self.class_eval %{def _layout; end}, __FILE__, __LINE__\n  when true\n    raise ArgumentError, \"Layouts must be specified as a String, Symbol, false, or nil\"\n  when nil\n    if name\n      _prefix = \"layouts\" unless _implied_layout_name =~ /\\blayouts/\n\n      self.class_eval <<-RUBY, __FILE__, __LINE__ + 1\n        def _layout\n          if template_exists?(\"\#{_implied_layout_name}\", \#{_prefix.inspect})\n            \"\#{_implied_layout_name}\"\n          else\n            super\n          end\n        end\n      RUBY\n    end\n  end\n  self.class_eval { private :_layout }\nend\n", __FILE__, __LINE__ + 1

#inherited(klass) ⇒ Object 



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# File 'lib/abstract_controller/layouts.rb', line 175

def inherited(klass)
  super
  klass._write_layout_method
end

#layout(layout, conditions = {}) ⇒ Object

Specify the layout to use for this class.

If the specified layout is a:

String

the String is the template name

Symbol

call the method specified by the symbol, which will return

the template name
false

There is no layout

true

raise an ArgumentError

Parameters

  • String, Symbol, false - The layout to use.

Options (conditions)

  • :only - A list of actions to apply this layout to.

  • :except - Apply this layout to all actions but this one.



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# File 'lib/abstract_controller/layouts.rb', line 219

def layout(layout, conditions = {})
  include LayoutConditions unless conditions.empty?

  conditions.each {|k, v| conditions[k] = Array(v).map {|a| a.to_s} }
  self._layout_conditions = conditions

  @_layout = layout || false # Converts nil to false
  _write_layout_method
end