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Contents
# frozen_string_literal: true
module Pastel
# Collects a list of decorators for styling a string
#
# @api private
class DecoratorChain
include Enumerable
# Create an empty decorator chain
#
# @return [DecoratorChain]
#
# @api public
def self.empty
@empty ||= self.new
end
# Create a decorator chain
#
# @api public
def initialize(decorators = [].freeze)
@decorators = decorators
end
# Add decorator
#
# @param [String] decorator
#
# @api public
def add(decorator)
if decorators.include?(decorator)
self.class.new(decorators)
else
self.class.new(decorators + [decorator])
end
end
# Iterate over list of decorators
#
# @api public
def each(&block)
decorators.each(&block)
end
# Compare colors for equality of attributes
#
# @return [Boolean]
#
# @api public
def eql?(other)
instance_of?(other.class) && decorators.eql?(other.decorators)
end
# Compare colors for equivalence of attributes
#
# @return [Boolean]
#
# @api public
def ==(other)
other.is_a?(self.class) && decorators == other.decorators
end
# Inspect this instance attributes
#
# @return [String]
#
# @api public
def inspect
"#<#{self.class.name} decorators=#{decorators.inspect}>"
end
# Hash for this instance and its attributes
#
# @return [Numeric]
#
# @api public
def hash
[self.class, decorators].hash
end
protected
attr_reader :decorators
end # DecoratorChain
end # Patel
Version data entries
5 entries across 5 versions & 2 rubygems