Module: PolyDelegate

Defined in:
lib/poly_delegate/method.rb,
lib/poly_delegate/call.rb,
lib/poly_delegate/version.rb,
lib/poly_delegate/delegated.rb,
lib/poly_delegate/delegator.rb,
lib/poly_delegate/classic_access.rb

Overview

This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

Defined Under Namespace

Modules: ClassicAttributeAccess, Delegated Classes: Delegator

Constant Summary collapse

VERSION = 
'1.2.2'.freeze

Class Method Summary collapse

Class Method Details

.caller 



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# File 'lib/poly_delegate/method.rb', line 9

def self.caller
  callers(2).last
end

.callers(num) 



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# File 'lib/poly_delegate/method.rb', line 13

def self.callers(num)
  caller_locations(2, num).map(&:label).map(&:to_sym)
end

.create_delegated_method(klass, name) 



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# File 'lib/poly_delegate/call.rb', line 29

def self.create_delegated_method(klass, name)
  method = klass.instance_method(name)

  redefine_method(klass, name) do |*args, &block|
    PolyDelegate.delegate_call(self, method, *args, &block)
  end
end

.delegate_call(obj, method, *args, &block) 



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# File 'lib/poly_delegate/call.rb', line 23

def self.delegate_call(obj, method, *args, &block)
  delegator, args = distinguish_delegator(obj, *args)
  bound = method.force_bind(delegator)
  bound.call(*args, &block)
end

.distinguish_delegator(obj, *args) 



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# File 'lib/poly_delegate/call.rb', line 12

def self.distinguish_delegator(obj, *args)
  delegator =
    if args.empty? || !args.first.is_a?(Delegator)
      obj
    else
      args.shift
    end

  [delegator, args]
end

.method_visibility(obj, method) 



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# File 'lib/poly_delegate/method.rb', line 17

def self.method_visibility(obj, method)
  if obj.public_method_defined? method
    :public
  elsif obj.private_method_defined? method
    :private
  elsif obj.protected_method_defined? method
    :protected
  end
end

.redefine_method(obj, name, &block) 



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# File 'lib/poly_delegate/method.rb', line 31

def self.redefine_method(obj, name, &block)
  visibility = method_visibility(obj, name)
  obj.__send__(:undef_method, name)
  obj.__send__(:define_method, name, &block)
  set_method_visibility(obj, name, visibility)
end

.set_method_visibility(obj, method, visibility) 



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# File 'lib/poly_delegate/method.rb', line 27

def self.set_method_visibility(obj, method, visibility)
  obj.__send__ visibility, method
end