Class: Termfront::Input

Inherits:
Object
  • Object
show all
Defined in:
lib/termfront/input.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Input

Returns a new instance of Input.



5
6
7
8
 
# File 'lib/termfront/input.rb', line 5

def initialize
  @key_state = {}
  @pending = +""
end

Instance Method Details

#clear ⇒ Object 



70
71
72
73
 
# File 'lib/termfront/input.rb', line 70

def clear
  @key_state.clear
  @pending.clear
end

#key?(sym) ⇒ Boolean

Returns:

  • (Boolean) 


66
67
68
 
# File 'lib/termfront/input.rb', line 66

def key?(sym)
  @key_state[sym]
end

#process(stdin, player: nil) ⇒ Object 



56
57
58
59
60
61
62
63
64
 
# File 'lib/termfront/input.rb', line 56

def process(stdin, player: nil)
  keys = read_keys(stdin)

  @key_state.each_key { |k| @key_state[k] -= 1 }
  @key_state.delete_if { |_, v| v <= 0 }
  keys.each { |k| @key_state[k] = Config::KEY_TIMEOUT }

  keys
end

#read_keys(stdin) ⇒ Object 



10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
 
# File 'lib/termfront/input.rb', line 10

def read_keys(stdin)
  keys = []

  while IO.select([stdin], nil, nil, 0)
    begin
      @pending << stdin.read_nonblock(64)
    rescue IO::WaitReadable
      break
    end
  end

  i = 0
  while i < @pending.bytesize
    ch = @pending.getbyte(i)
    if ch == 27
      if @pending.getbyte(i + 1) == 91 && (code = @pending.getbyte(i + 2))
        case code
        when 65 then keys << :up
        when 66 then keys << :down
        when 67 then keys << :right
        when 68 then keys << :left
        end
        i += 3
      else
        keys << :esc
        i += 1
      end
    else
      case ch
      when 119 then keys << :w
      when 97  then keys << :a
      when 115 then keys << :s
      when 100 then keys << :d
      when 32  then keys << :space
      when 113 then keys << :q
      when 116 then keys << :t
      when 101 then keys << :e
      end
      i += 1
    end
  end

  @pending.clear
  keys
end