class IRB::ReadlineInputMethod

Public Class Methods

initialize_readline() click to toggle source

# File lib/irb/input-method.rb, line 173
def self.initialize_readline
  require "readline"
rescue LoadError
else
  include ::Readline
end

new() click to toggle source

Creates a new input method object using Readline

Calls superclass method IRB::StdioInputMethod::new

# File lib/irb/input-method.rb, line 183
def initialize
  self.class.initialize_readline
  if Readline.respond_to?(:encoding_system_needs)
    IRB.__send__(:set_encoding, Readline.encoding_system_needs.name, override: false)
  end

  super

  @eof = false
  @completor = RegexpCompletor.new

  if Readline.respond_to?("basic_word_break_characters=")
    Readline.basic_word_break_characters = BASIC_WORD_BREAK_CHARACTERS
  end
  Readline.completion_append_character = nil
  Readline.completion_proc = ->(target) {
    bind = IRB.conf[:MAIN_CONTEXT].workspace.binding
    @completor.completion_candidates('', target, '', bind: bind)
  }
end

Public Instance Methods

completion_info() click to toggle source

# File lib/irb/input-method.rb, line 204
def completion_info
  'RegexpCompletor'
end

eof?() click to toggle source

Whether the end of this input method has been reached, returns true if there is no more data to read.

See IO#eof? for more information.

# File lib/irb/input-method.rb, line 227
def eof?
  @eof
end

gets() click to toggle source

Reads the next line from this input method.

See IO#gets for more information.

# File lib/irb/input-method.rb, line 211
def gets
  Readline.input = @stdin
  Readline.output = @stdout
  if l = readline(@prompt, false)
    HISTORY.push(l) if !l.empty?
    @line[@line_no += 1] = l + "\n"
  else
    @eof = true
    l
  end
end

inspect() click to toggle source

For debug message

# File lib/irb/input-method.rb, line 236
def inspect
  readline_impl = (defined?(Reline) && Readline == Reline) ? 'Reline' : 'ext/readline'
  str = "ReadlineInputMethod with #{readline_impl} #{Readline::VERSION}"
  inputrc_path = File.expand_path(ENV['INPUTRC'] || '~/.inputrc')
  str += " and #{inputrc_path}" if File.exist?(inputrc_path)
  str
end

prompting?() click to toggle source

# File lib/irb/input-method.rb, line 231
def prompting?
  true
end