class IRB::StdioInputMethod - RDoc Documentation

# class IRB::StdioInputMethod

### Public Class Methods

new() click to toggle source

Creates a new input method object

Calls superclass method `IRB::InputMethod::new`

    # File lib/irb/input-method.rb, line 64
    def initialize
      super
      @line_no = 0
      @line = []
      @stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
      @stdout = IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
    end

### Public Instance Methods

encoding() click to toggle source

The external encoding for standard input.

    # File lib/irb/input-method.rb, line 115
    def encoding
      @stdin.external_encoding
    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 85
    def eof?
      rs, = IO.select([@stdin], [], [], 0.00001)
      if rs and rs[0]
        c = @stdin.getc
        result = c.nil? ? true : false
        @stdin.ungetc(c) unless c.nil?
        result
      else # buffer is empty
        false
      end
    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 75
    def gets
      print @prompt
      line = @stdin.gets
      @line[@line_no += 1] = line
    end

inspect() click to toggle source

For debug message

    # File lib/irb/input-method.rb, line 120
    def inspect
      'StdioInputMethod'
    end

line(line_no) click to toggle source

Returns the current line number for io.

`line` counts the number of times `gets` is called.

See `IO#lineno` for more information.

    # File lib/irb/input-method.rb, line 110
    def line(line_no)
      @line[line_no]
    end

readable_after_eof?() click to toggle source

Whether this input method is still readable when there is no more data to read.

See `IO#eof` for more information.

    # File lib/irb/input-method.rb, line 101
    def readable_after_eof?
      true
    end