Class: Teletype::Key

Inherits:
Object
  • Object
show all
Defined in:
lib/teletype/key.rb

Overview

Key implements console reading for multibyte inputs and translates to unicode characters. The unicode characters will be useful when displaying the inputs back to console.

Constant Summary collapse

DICTIONARY = 
{
  "\e" => '␛',
  "\e[1;5A" => '↥', # ctrl-up
  "\e[1;5B" => '↧', # ctrl-down
  "\e[1;5C" => '↦', # ctrl-right
  "\e[1;5D" => '↤', # ctrl-left

  "\e[1~" => '⌂', # home
  "\e[2~" => '⎀', # insert
  "\e[3~" => '⌦', # delete
  "\e[3;2~" => '↱', # shift+delete
  "\e[3;5~" => '↪', # ctrl+delete
  "\e[4~" => '↘', # end
  "\e[5~" => '⇞', # page up
  "\e[6~" => '⇟', # page down
  "\e[7~" => '⌂', # home
  "\e[8~" => '↘', # end

  "\e[A" => '↑',
  "\e[B" => '↓',
  "\e[C" => '→',
  "\e[D" => '←',
  "\e[E" => '⇲', # clear
  "\e[H" => '⌂', # home
  "\e[F" => '↘', # end
  "\e[Z" => '⇤', # backtab(shift + tab)

  "\u0003" => '⏻',
  "\u007F" => '⌫', # backspace
  "\r" => "\n",
  "\t" => '⇥'
}.freeze

Class Method Summary collapse

Class Method Details

.read ⇒ Object 



44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
 
# File 'lib/teletype/key.rb', line 44

def self.read
  blocking = true
  chars = []
  $stdin.raw do
    $stdin.noecho do
      loop do
        if blocking
          chars << $stdin.getc
          blocking = false
        elsif $stdin.ready?
          chars << $stdin.getc
        else
          key = chars.join
          return DICTIONARY[key] || key
        end
      end
    end
  end
end