类 IRB::ReadlineInputMethod

公共类方法

initialize_readline() 点击切换源代码

# File lib/irb/input-method.rb, line 165
def self.initialize_readline
  require "readline"
rescue LoadError
else
  include ::Readline
end

new() 点击切换源代码

使用 Readline 创建一个新的输入方法对象

调用超类方法 IRB::StdioInputMethod::new

# File lib/irb/input-method.rb, line 175
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

公共实例方法

completion_info() 点击切换源代码

# File lib/irb/input-method.rb, line 196
def completion_info
  'RegexpCompletor'
end

eof?() 点击切换源代码

是否已到达此输入方法的末尾，如果不再有数据可读，则返回 true。

有关更多信息，请参见 IO#eof?。

# File lib/irb/input-method.rb, line 219
def eof?
  @eof
end

gets() 点击切换源代码

从此输入方法读取下一行。

有关更多信息，请参见 IO#gets。

# File lib/irb/input-method.rb, line 203
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() 点击切换源代码

用于调试消息

# File lib/irb/input-method.rb, line 224
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