Class: Magick::BinMagick::MagickWrapper

Inherits:
Object
  • Object
show all
Defined in:
lib/rmagick/bin_magick/magick_wrapper.rb

Overview

A wrapper around the “Magick::Image” class, providing a dynamic interface for forwarding method calls to the underlying “Magick::Image” object. When a method is called on “MagickWrapper”, it first checks if the underlying “Magick::Image” object responds to that method, and if so, it invokes the method on the object and returns the result.

If the result is another “Magick::Image” object, it wraps it in a new “MagickWrapper” object, allowing chaining of method calls.

If the result is not a “Magick::Image” object, it returns the result as is.

If the underlying “Magick::Image” object does not respond to the method, it raises a “NoMethodError”.

Direct Known Subclasses

Image

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(image) ⇒ MagickWrapper

Returns a new instance of MagickWrapper.

Raises:



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# File 'lib/rmagick/bin_magick/magick_wrapper.rb', line 21

def initialize(image)
  raise BinMagick::DestroyedImageError, "Destroyed image" if image.destroyed?

  @image = image
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_name, *args, &block) ⇒ Object 



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# File 'lib/rmagick/bin_magick/magick_wrapper.rb', line 27

def method_missing(method_name, *args, &block)
  if @image.respond_to?(method_name)
    result = @image.send(method_name, *args, &block)
    if result.is_a?(Magick::Image)
      self.class.new(result)
    else
      result
    end
  else
    super
  end
end

Instance Attribute Details

#image ⇒ Object (readonly)

Returns the value of attribute image.



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# File 'lib/rmagick/bin_magick/magick_wrapper.rb', line 19

def image
  @image
end

Instance Method Details

#respond_to_missing?(method_name, include_private = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rmagick/bin_magick/magick_wrapper.rb', line 40

def respond_to_missing?(method_name, include_private = false)
  @image.respond_to?(method_name) || super
end