Class: ImageOptim::OptionDefinition

Inherits:
Object
  • Object
show all
Defined in:
lib/image_optim/option_definition.rb

Overview

Hold information about an option

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, default, type_or_description, description = nil, &proc) ⇒ OptionDefinition

Returns a new instance of OptionDefinition.



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# File 'lib/image_optim/option_definition.rb', line 8

def initialize(name, default, type_or_description, description = nil, &proc)
  if type_or_description.is_a?(Class)
    type = type_or_description
  else
    type, description = default.class, type_or_description
  end

  @name = name.to_sym
  @description = description.to_s
  @default, @type, @proc = default, type, proc
end

Instance Attribute Details

#default ⇒ Object (readonly)

Returns the value of attribute default.



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# File 'lib/image_optim/option_definition.rb', line 6

def default
  @default
end

#description ⇒ Object (readonly)

Returns the value of attribute description.



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# File 'lib/image_optim/option_definition.rb', line 6

def description
  @description
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/image_optim/option_definition.rb', line 6

def name
  @name
end

#proc ⇒ Object (readonly)

Returns the value of attribute proc.



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# File 'lib/image_optim/option_definition.rb', line 6

def proc
  @proc
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/image_optim/option_definition.rb', line 6

def type
  @type
end

Instance Method Details

#default_description ⇒ Object

Describe default value, returns string as is otherwise surrounds inspected value with backticks



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# File 'lib/image_optim/option_definition.rb', line 36

def default_description
  default.is_a?(String) ? default : "`#{default.inspect}`"
end

#value(worker, options) ⇒ Object

Get value for worker from options



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# File 'lib/image_optim/option_definition.rb', line 21

def value(worker, options)
  value = options.key?(name) ? options[name] : default
  if proc
    if proc.arity == 2
      worker.instance_exec(value, self, &proc)
    else
      worker.instance_exec(value, &proc)
    end
  else
    value
  end
end