Class: HighLine::Terminal::UnixStty

Inherits:
HighLine::Terminal show all
Defined in:
lib/highline/terminal/unix_stty.rb

Overview

HighLine::Terminal option that uses external "stty" program to control terminal options.

Instance Attribute Summary

Attributes inherited from HighLine::Terminal

#input, #output

Instance Method Summary collapse

Methods inherited from HighLine::Terminal

#character_mode, #get_line, #get_line_default, #get_line_with_readline, get_terminal, #initialize, #initialize_system_extensions, #jruby?, #raw_no_echo_mode_exec, #readline_read, #rubinius?, #windows?

Constructor Details

This class inherits a constructor from HighLine::Terminal

Instance Method Details

#get_character(input = STDIN) ⇒ String

Get one character from the terminal

Returns:



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# File 'lib/highline/terminal/unix_stty.rb', line 48

def get_character(input = STDIN)
  input.getc
end

#raw_no_echo_mode ⇒ Object

Enter Raw No Echo mode.



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# File 'lib/highline/terminal/unix_stty.rb', line 36

def raw_no_echo_mode
  save_stty 
  system "stty raw -echo -icanon isig" if input.tty?
end

#restore_mode ⇒ Object

Restore terminal to its default mode



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# File 'lib/highline/terminal/unix_stty.rb', line 42

def restore_mode
  restore_stty
  print "\r"
end

#terminal_size ⇒ Array<Integer, Integer>

A Unix savvy method using stty to fetch the console columns, and rows. ... stty does not work in JRuby

Returns:

  • (Array<Integer, Integer>) —

    two value terminal size like [columns, lines]



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# File 'lib/highline/terminal/unix_stty.rb', line 11

def terminal_size
  begin
    require "io/console"
    winsize = begin
                IO.console.winsize.reverse
              rescue NoMethodError
                nil
              end
    return winsize if winsize
  rescue LoadError
  end

  if !@output.tty?
    [80, 24]
  elsif /solaris/ =~ RUBY_PLATFORM &&
     `stty` =~ /\brows = (\d+).*\bcolumns = (\d+)/
    [Regexp.last_match(2), Regexp.last_match(1)].map(&:to_i)
  elsif `stty size` =~ /^(\d+)\s(\d+)$/
    [Regexp.last_match(2).to_i, Regexp.last_match(1).to_i]
  else
    [80, 24]
  end
end