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|
# frozen_string_literal: true
require_relative 'shortcuts_version'
require 'paint'
module Paint
# Hash for defining color/effect shortcuts
SHORTCUTS = {
# :example => { # would create a Paint::Example constant...
# :light_red => "\e[31;1m", # with a method .light_red
# }
}
SHORTCUTS.default = {}
class << self
# Paint::SomeModule --> Paint::SHORTCUTS[:some_module]
def const_missing(mod_name)
# get shortcuts
shortcuts = SHORTCUTS[mod_name.to_s.gsub(/[A-Z]/,'_\0').downcase[1..-1].to_sym] || []
# create module
class_eval "module #{mod_name}; end"
mod = const_get(mod_name)
# define direct behaviour, class methods
mod.define_singleton_method :method_missing do |color_name, *args|
if color_code = shortcuts[color_name]
string = Array(args).join
return string if Paint.mode.zero?
if args.empty?
color_code
else
color_code + string + NOTHING
end
else
nil
end
end
mod.define_singleton_method :respond_to_missing? do |color_name, *args|
shortcuts.include?(color_name) || super(color_name, *args)
end
# define include behaviour, instance methods
mod.define_singleton_method :included do |_|
shortcuts.each{ |color_name, color_code|
define_method color_name do |*args|
string = Array(args).join
return string if Paint.mode.zero?
if args.empty?
color_code
else
color_code + string + NOTHING
end
end
}
private(*shortcuts.keys) unless shortcuts.empty?
end
# include variations, defined in child modules
mod.class_eval "module String; end"
string = mod.const_get(:String)
string.define_singleton_method :included do |_|
shortcuts.each{ |color_name, color_code|
define_method color_name do
if Paint.mode.zero?
to_s
else
color_code + to_s + NOTHING
end
end
}
end
# OK, let's take it one level further ;)
mod.class_eval "module Prefix; end"
prefix_prefix = mod.const_get(:Prefix)
prefix_prefix.define_singleton_method :const_missing do |prefix_name|
class_eval "module #{prefix_name}; end"
prefix = const_get(prefix_name)
prefix.define_singleton_method :included do |_|
define_method prefix_name.to_s.gsub(/[A-Z]/,'_\0').downcase[1..-1].to_sym do |color_name|
if color_code = shortcuts[color_name]
return to_s if Paint.mode.zero?
color_code + to_s + NOTHING
end
end
end
prefix
end
mod
end
end
end
|
