class IRB::RelineInputMethod

def initialize
  IRB.__send__(:set_encoding, Reline.encoding_system_needs.name, override: false)
  super
  @eof = false
  @completor = RegexpCompletor.new
  Reline.basic_word_break_characters = BASIC_WORD_BREAK_CHARACTERS
  Reline.completion_append_character = nil
  Reline.completer_quote_characters = ''
  Reline.completion_proc = ->(target, preposing, postposing) {
    bind = IRB.conf[:MAIN_CONTEXT].workspace.binding
    @completion_params = [preposing, target, postposing, bind]
    @completor.completion_candidates(preposing, target, postposing, bind: bind)
  }
  Reline.output_modifier_proc =
    if IRB.conf[:USE_COLORIZE]
      proc do |output, complete: |
        next unless IRB::Color.colorable?
        lvars = IRB.CurrentContext&.local_variables || []
        IRB::Color.colorize_code(output, complete: complete, local_variables: lvars)
      end
    else
      proc do |output|
        Reline::Unicode.escape_for_print(output)
      end
    end
  Reline.dig_perfect_match_proc = ->(matched) { display_document(matched) }
  Reline.autocompletion = IRB.conf[:USE_AUTOCOMPLETE]
  if IRB.conf[:USE_AUTOCOMPLETE]
    begin
      require 'rdoc'
      Reline.add_dialog_proc(:show_doc, show_doc_dialog_proc, Reline::DEFAULT_DIALOG_CONTEXT)
    rescue LoadError
    end
  end
end