Class: Game2048::Terminal

Inherits:
Object
  • Object
show all
Defined in:
lib/game_2048/terminal.rb

Overview

VT100 terminal

Constant Summary collapse

CSI = 
"\e["
CUU = 
'A'
CUD = 
'B'
CUF = 
'C'
CUB = 
'D'
CUP = 
'H'
ED = 
'J'
SGR = 
'm'
CPR = 
'6n'
CPA = 
'R'
HIDE_CURSOR = 
'?25l'
SHOW_CURSOR = 
'?25h'
ALT_SCREEN_ON = 
'?1049h'
ALT_SCREEN_OFF = 
'?1049l'
RESET = 
0
BOLD = 
1
DIM = 
2

5
REVERSE = 
7
UNDERSCORE = 
4
COLOR_FG = 
30
COLOR_BG = 
40
COLORS = 
{
  black: 0,
  red: 1,
  green: 2,
  yellow: 3,
  blue: 4,
  magenta: 5,
  cyan: 6,
  white: 7
}.freeze
KEY_MAP = 
{
  CUU => :up,
  CUD => :down,
  CUF => :right,
  CUB => :left
}.freeze
CHARS_MAP = 
{
  "\x03" => :ctrl_c,
  "\x0c" => :ctrl_l,
  "\x1a" => :ctrl_z
}.freeze

Instance Method Summary collapse

Constructor Details

#initialize(input: $stdin, output: $stdout) ⇒ Terminal

Returns a new instance of Terminal.



58
59
60
61
62
 
# File 'lib/game_2048/terminal.rb', line 58

def initialize(input: $stdin, output: $stdout)
  @input = input
  @output = output
  @sgr = []
end

Instance Method Details

#alt_screen_off ⇒ Object 



123
124
125
 
# File 'lib/game_2048/terminal.rb', line 123

def alt_screen_off
  @output.write("#{CSI}#{ALT_SCREEN_OFF}")
end

#alt_screen_on ⇒ Object 



119
120
121
 
# File 'lib/game_2048/terminal.rb', line 119

def alt_screen_on
  @output.write("#{CSI}#{ALT_SCREEN_ON}")
end

#bg_color(color) ⇒ Object 



81
82
83
84
 
# File 'lib/game_2048/terminal.rb', line 81

def bg_color(color)
  color_exist?(color)
  @sgr << COLORS[color] + COLOR_BG
end

#blink ⇒ Object 



98
99
100
 
# File 'lib/game_2048/terminal.rb', line 98

def blink
  @sgr << BLINK
end

#bold ⇒ Object 



86
87
88
 
# File 'lib/game_2048/terminal.rb', line 86

def bold
  @sgr << BOLD
end

#cooked_mode ⇒ Object 



171
172
173
 
# File 'lib/game_2048/terminal.rb', line 171

def cooked_mode
  @input&.cooked!
end

#dim ⇒ Object 



94
95
96
 
# File 'lib/game_2048/terminal.rb', line 94

def dim
  @sgr << DIM
end

#display_size ⇒ Object 



127
128
129
130
131
132
133
134
135
136
137
138
139
140
 
# File 'lib/game_2048/terminal.rb', line 127

def display_size
  move_to(999, 999)
  @output.write("#{CSI}#{CPR}")
  data = String.new
  data << @input.readchar
  data << @input.readchar
  return if data != CSI

  data.clear
  while (char = @input.readchar) != CPA
    data << char
  end
  data.split(';').map(&:to_i)
end

#erase_display ⇒ Object 



72
73
74
 
# File 'lib/game_2048/terminal.rb', line 72

def erase_display
  @output.write("#{CSI}2#{ED}")
end

#fg_color(color) ⇒ Object 



76
77
78
79
 
# File 'lib/game_2048/terminal.rb', line 76

def fg_color(color)
  color_exist?(color)
  @sgr << COLORS[color] + COLOR_FG
end

#hide_cursor ⇒ Object 



111
112
113
 
# File 'lib/game_2048/terminal.rb', line 111

def hide_cursor
  @output.write("#{CSI}#{HIDE_CURSOR}")
end

#move_home ⇒ Object 



68
69
70
 
# File 'lib/game_2048/terminal.rb', line 68

def move_home
  move_to(1, 1)
end

#move_to(x, y) ⇒ Object 



64
65
66
 
# File 'lib/game_2048/terminal.rb', line 64

def move_to(x, y)
  @output.write("#{CSI}#{y};#{x}#{CUP}")
end

#raw_mode ⇒ Object 



167
168
169
 
# File 'lib/game_2048/terminal.rb', line 167

def raw_mode
  @input&.raw!
end

#read ⇒ Object 



148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
 
# File 'lib/game_2048/terminal.rb', line 148

def read
  data = @input.readchar
  if data == "\e"
    data << @input.readchar
    if data == CSI
      data.clear
      loop do
        char = @input.readchar
        data << char
        break unless char.ord.between?(0x30, 0x39) || char == ';'
      end

      return KEY_MAP.fetch(data, :unknown)
    end
  end

  CHARS_MAP.fetch(data, data)
end

#reset ⇒ Object 



106
107
108
109
 
# File 'lib/game_2048/terminal.rb', line 106

def reset
  @sgr.clear
  @output.write("#{CSI}#{RESET}#{SGR}")
end

#reverse ⇒ Object 



102
103
104
 
# File 'lib/game_2048/terminal.rb', line 102

def reverse
  @sgr << REVERSE
end

#show_cursor ⇒ Object 



115
116
117
 
# File 'lib/game_2048/terminal.rb', line 115

def show_cursor
  @output.write("#{CSI}#{SHOW_CURSOR}")
end

#underscore ⇒ Object 



90
91
92
 
# File 'lib/game_2048/terminal.rb', line 90

def underscore
  @sgr << UNDERSCORE
end

#write(text = '') ⇒ Object 



142
143
144
145
146
 
# File 'lib/game_2048/terminal.rb', line 142

def write(text = '')
  text = "#{CSI}#{@sgr.join(';')}#{SGR}#{text}" unless @sgr.empty?
  @sgr.clear
  @output.write(text)
end