Module: Potty::Ansi

Defined in:
lib/potty/ansi.rb

Overview

Resolve a Style to ANSI SGR escape codes. Shared by InlineSurface (which paints a region) and Potty::Mouth (one-off styled lines), so the symbolic-colour -> SGR mapping lives in exactly one place.

Constant Summary collapse

SGR_FG = 
{
  default: 39, black: 30, red: 31, green: 32, yellow: 33,
  blue: 34, magenta: 35, cyan: 36, white: 37, bright_black: 90
}.freeze
SGR_BG = 
{
  default: 49, black: 40, red: 41, green: 42, yellow: 43,
  blue: 44, magenta: 45, cyan: 46, white: 47, bright_black: 100
}.freeze
RESET = 
"\e[0m"

Class Method Summary collapse

Class Method Details

.reset ⇒ Object 



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# File 'lib/potty/ansi.rb', line 32

def reset
  RESET
end

.sgr(style) ⇒ Object 



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# File 'lib/potty/ansi.rb', line 20

def sgr(style)
  return RESET if style.nil?

  codes = []
  codes << 1 if style.bold?
  codes << 4 if style.underline?
  codes << 7 if style.reverse?
  codes << SGR_FG.fetch(style.fg, 39)
  codes << SGR_BG.fetch(style.bg, 49)
  "\e[#{codes.join(';')}m"
end