class Reline::KeyStroke using Module.new { refine Array do def start_with?(other) other.size <= size && other == self.take(other.size) end def bytes self end end } def initialize(config) @config = config end def match_status(input) key_mapping.keys.select { |lhs| lhs.start_with? input }.tap { |it| return :matched if it.size == 1 && (it.max_by(&:size)&.size&.== input.size) return :matching if it.size == 1 && (it.max_by(&:size)&.size&.!= input.size) return :matched if it.max_by(&:size)&.size&.< input.size return :matching if it.size > 1 } key_mapping.keys.select { |lhs| input.start_with? lhs }.tap { |it| return it.size > 0 ? :matched : :unmatched } end def expand(input) lhs = key_mapping.keys.select { |item| input.start_with? item }.sort_by(&:size).reverse.first return input unless lhs rhs = key_mapping[lhs] case rhs when String rhs_bytes = rhs.bytes expand(expand(rhs_bytes) + expand(input.drop(lhs.size))) when Symbol [rhs] + expand(input.drop(lhs.size)) when Array rhs end end private def key_mapping @config.key_bindings end end