Class: SuperDiff::Csi::EightBitColor

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

Constant Summary collapse

VALID_COMPONENT_RANGE = 
(0..6).freeze
VALID_CODE_RANGE = 
(0..255).freeze
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 = 
{ foreground: 38, background: 48 }.freeze
LAYERS_BY_LEADING_CODE = 
LEADING_CODES_BY_LAYER.invert.freeze
SERIAL_CODE = 
5
OPENING_REGEX = 
/\e\[(\d+);#{SERIAL_CODE};(\d+)m/.freeze

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Color

#background?, exists?, #foreground?, resolve, sub_colorized_areas_in

Constructor Details

#initialize(value = nil, layer: nil, red: nil, green: nil, blue: nil, type: nil, index: nil) ⇒ EightBitColor

Returns a new instance of EightBitColor.



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# File 'lib/super_diff/csi/eight_bit_color.rb', line 44

def initialize(
  value = nil,
  layer: nil,
  red: nil,
  green: nil,
  blue: nil,
  type: nil,
  index: nil
)
  if value
    case value
    when Symbol
      @code = interpret_color_name!(value)
      @layer = interpret_layer!(layer)
    when Array
      @code = interpret_pair!(type: type, index: index)
      @layer = interpret_layer!(layer)
    else
      if value.is_a?(String) && value.start_with?("\e[")
        pair = interpret_sequence!(value)
        @code = pair.fetch(:code)
        @layer = pair.fetch(:layer)
      else
        @code = interpret_code!(value)
        @layer = interpret_layer!(layer)
      end
    end
  else
    @code = interpret_triplet!(red: red, green: green, blue: blue)
    @layer = interpret_layer!(layer)
  end
end

Class Method Details

.opening_regex ⇒ Object 



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# File 'lib/super_diff/csi/eight_bit_color.rb', line 40

def self.opening_regex
  OPENING_REGEX
end

Instance Method Details

#to_foreground ⇒ Object 



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# File 'lib/super_diff/csi/eight_bit_color.rb', line 81

def to_foreground
  self.class.new(code, layer: :foreground)
end

#to_s ⇒ Object 



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# File 'lib/super_diff/csi/eight_bit_color.rb', line 77

def to_s
  "\e[#{leading_code};#{SERIAL_CODE};#{code}m"
end