Module: Pakyow::Support::ClassState

Defined in:
lib/pakyow/support/class_state.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.extended(base) ⇒ Object 



26
27
28
29
30
 
# File 'lib/pakyow/support/class_state.rb', line 26

def self.extended(base)
  unless base.instance_variable_defined?(:@__class_state)
    base.instance_variable_set(:@__class_state, {})
  end
end

Instance Method Details

#class_state(name, default: nil, inheritable: false, reader: true) ⇒ Object 



10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
# File 'lib/pakyow/support/class_state.rb', line 10

def class_state(name, default: nil, inheritable: false, reader: true)
  ivar = :"@#{name}"
  @__class_state[ivar] = {
    default: default,
    inheritable: inheritable
  }

  instance_variable_set(ivar, default.deep_dup)

  if reader
    define_singleton_method name do
      instance_variable_get(ivar)
    end
  end
end

#inherited(subclass) ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
# File 'lib/pakyow/support/class_state.rb', line 32

def inherited(subclass)
  subclass.instance_variable_set(:@__class_state, @__class_state.deep_dup)

  @__class_state.each do |ivar, options|
    if options[:inheritable]
      subclass.instance_variable_set(ivar, instance_variable_get(ivar).deep_dup)
    elsif @__class_state[ivar][:default]
      subclass.instance_variable_set(ivar, @__class_state[ivar][:default].deep_dup)
    else
      subclass.instance_variable_set(ivar, nil)
    end
  end

  super
end