Class: SuperDiff::Csi::EightBitColor

Inherits:
Object
  • Object
show all
Defined in:
lib/super_diff/csi/eight_bit_color.rb

Constant Summary collapse

VALID_COMPONENT_RANGE = 
0..6
VALID_CODE_RANGE = 
0..255
VALID_CODES_BY_NAME = 
{
  black: 0,
  red: 1,
  green: 2,
  yellow: 3,
  blue: 4,
  magenta: 5,
  cyan: 6,
  white: 7,
  bright_black: 8,
  bright_red: 9,
  bright_green: 10,
  bright_yellow: 11,
  bright_blue: 12,
  bright_magenta: 13,
  bright_cyan: 14,
  bright_white: 15,
}.freeze
STARTING_INDICES = 
{
  standard: 0,
  high_intensity: 8,
  grayscale: 232,
}.freeze
VALID_PAIR_TYPES = 
STARTING_INDICES.keys
VALID_PAIR_INDEX_RANGES = 
{
  standard: 0..7,
  high_intensity: 0..7,
  grayscale: 0..23,
}.freeze
LEADING_CODES_BY_LAYER = 
{ fg: 38, bg: 48 }.freeze
SERIAL_CODE = 
5

Instance Method Summary collapse

Constructor Details

#initialize(value) ⇒ EightBitColor

Returns a new instance of EightBitColor.



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# File 'lib/super_diff/csi/eight_bit_color.rb', line 38

def initialize(value)
  @code =
    case value
    when Hash
      interpret_triplet!(value)
    when Symbol
      interpret_color_name!(value)
    when Array
      interpret_pair!(value)
    else
      interpret_code!(value)
    end
end

Instance Method Details

#sequence_for(layer) ⇒ Object 



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# File 'lib/super_diff/csi/eight_bit_color.rb', line 52

def sequence_for(layer)
  leading_code = LEADING_CODES_BY_LAYER.fetch(layer)
  "\e[#{leading_code};#{SERIAL_CODE};#{code}m"
end