Class: Rouge::Formatters::Terminal256::EscapeSequence

Inherits:
Object
  • Object
show all
Defined in:
lib/rouge/formatters/terminal256.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(style) ⇒ EscapeSequence


36
37
38
# File 'lib/rouge/formatters/terminal256.rb', line 36

def initialize(style)
  @style = style
end

Instance Attribute Details

#styleObject (readonly)

Returns the value of attribute style


35
36
37
# File 'lib/rouge/formatters/terminal256.rb', line 35

def style
  @style
end

Class Method Details

.xterm_colorsObject


40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
# File 'lib/rouge/formatters/terminal256.rb', line 40

def self.xterm_colors
  @xterm_colors ||= [].tap do |out|
    # colors 0..15: 16 basic colors
    out << [0x00, 0x00, 0x00] # 0
    out << [0xcd, 0x00, 0x00] # 1
    out << [0x00, 0xcd, 0x00] # 2
    out << [0xcd, 0xcd, 0x00] # 3
    out << [0x00, 0x00, 0xee] # 4
    out << [0xcd, 0x00, 0xcd] # 5
    out << [0x00, 0xcd, 0xcd] # 6
    out << [0xe5, 0xe5, 0xe5] # 7
    out << [0x7f, 0x7f, 0x7f] # 8
    out << [0xff, 0x00, 0x00] # 9
    out << [0x00, 0xff, 0x00] # 10
    out << [0xff, 0xff, 0x00] # 11
    out << [0x5c, 0x5c, 0xff] # 12
    out << [0xff, 0x00, 0xff] # 13
    out << [0x00, 0xff, 0xff] # 14
    out << [0xff, 0xff, 0xff] # 15

    # colors 16..232: the 6x6x6 color cube
    valuerange = [0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff]

    217.times do |i|
      r = valuerange[(i / 36) % 6]
      g = valuerange[(i / 6) % 6]
      b = valuerange[i % 6]
      out << [r, g, b]
    end

    # colors 233..253: grayscale
    1.upto 22 do |i|
      v = 8 + i * 10
      out << [v, v, v]
    end
  end
end

Instance Method Details

#bgObject


83
84
85
86
# File 'lib/rouge/formatters/terminal256.rb', line 83

def bg
  return @bg if instance_variable_defined? :@bg
  @bg = style.bg && self.class.color_index(style.bg)
end

#fgObject


78
79
80
81
# File 'lib/rouge/formatters/terminal256.rb', line 78

def fg
  return @fg if instance_variable_defined? :@fg
  @fg = style.fg && self.class.color_index(style.fg)
end

#reset_stringObject


100
101
102
103
104
105
106
107
108
109
# File 'lib/rouge/formatters/terminal256.rb', line 100

def reset_string
  @reset_string ||= begin
    attrs = []
    attrs << '39' if fg # fg reset
    attrs << '49' if bg # bg reset
    attrs << '00' if style[:bold] || style[:italic]

    escape(attrs)
  end
end

#style_stringObject


88
89
90
91
92
93
94
95
96
97
98
# File 'lib/rouge/formatters/terminal256.rb', line 88

def style_string
  @style_string ||= begin
    attrs = []

    attrs << ['38', '5', fg.to_s] if fg
    attrs << ['48', '5', bg.to_s] if bg
    attrs << '01' if style[:bold]
    attrs << '04' if style[:italic] # underline, but hey, whatevs
    escape(attrs)
  end
end