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# -*- coding: utf-8; frozen_string_literal: true -*-
#
#--
# Copyright (C) 2009-2019 Thomas Leitner <t_leitner@gmx.at>
#
# This file is part of kramdown which is licensed under the MIT.
#++
#
module Kramdown
module Utils
# Methods for registering configurable extensions.
module Configurable
# Create a new configurable extension called +name+.
#
# Three methods will be defined on the calling object which allow to use this configurable
# extension:
#
# configurables:: Returns a hash of hashes that is used to store all configurables of the
# object.
#
# <name>(ext_name):: Return the configured extension +ext_name+.
#
# add_<name>(ext_name, data=nil, &block):: Define an extension +ext_name+ by specifying either
# the data as argument or by using a block.
def configurable(name)
unless respond_to?(:configurables)
singleton_class.send(:define_method, :configurables) do
@_configurables ||= Hash.new {|h, k| h[k] = {} }
end
end
singleton_class.send(:define_method, name) do |data|
configurables[name][data]
end
singleton_class.send(:define_method, "add_#{name}".intern) do |data, *args, &block|
configurables[name][data] = args.first || block
end
end
end
end
end
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