Module: CLIMarkdown::Colors

Included in:
Converter, Redcarpet::Render::Console, String
Defined in:
lib/mdless/colors.rb

Constant Summary collapse

ESCAPE_REGEX = 
/(?<=\[)(?:(?:(?:[349]|10)[0-9]|[0-9])?;?)+(?=m)/.freeze
COLORS = 
{
  :reset => 0,     # synonym for :clear
  :x => 0,
  :bold => 1,
  :b => 1,
  :dark => 2,
  :d => 2,
  :italic => 3,     # not widely implemented
  :i => 3,
  :underline => 4,
  :underscore => 4,     # synonym for :underline
  :u => 4,
  :blink => 5,
  :rapid_blink => 6,     # not widely implemented
  :negative => 7,     # no reverse because of String#reverse
  :r => 7,
  :concealed => 8,
  :strikethrough => 9,     # not widely implemented
  :black => 30,
  :red => 31,
  :green => 32,
  :yellow => 33,
  :blue => 34,
  :magenta => 35,
  :cyan => 36,
  :white => 37,
  :on_black => 40,
  :on_red => 41,
  :on_green => 42,
  :on_yellow => 43,
  :on_blue => 44,
  :on_magenta => 45,
  :on_cyan => 46,
  :on_white => 47,
  :intense_black => 90,    # High intensity, aixterm (works in OS X)
  :intense_red => 91,
  :intense_green => 92,
  :intense_yellow => 93,
  :intense_blue => 94,
  :intense_magenta => 95,
  :intense_cyan => 96,
  :intense_white => 97,
  :on_intense_black => 100,    # High intensity background, aixterm (works in OS X)
  :on_intense_red => 101,
  :on_intense_green => 102,
  :on_intense_yellow => 103,
  :on_intense_blue => 104,
  :on_intense_magenta => 105,
  :on_intense_cyan => 106,
  :on_intense_white => 107
}

Instance Method Summary collapse

Instance Method Details

#blackout(bgcolor) ⇒ Object 



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# File 'lib/mdless/colors.rb', line 173

def blackout(bgcolor)
  key = bgcolor.to_sym
  bg = COLORS.key?(key) ? COLORS[key] : 40
  self.gsub(/(^|$)/,"\e[#{bg}m").gsub(/3([89])m/,"#{bg};3\\1m")
end

#c(args) ⇒ Object 



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# File 'lib/mdless/colors.rb', line 218

def c(args)
  out = []

  args.each {|arg|
    if COLORS.key? arg
      out << COLORS[arg]
    end
  }

  if out.size > 0
    "\e[#{out.sort.join(';')}m"
  else
    ''
  end
end

#last_color_code ⇒ Object

Get the calculated ANSI color at the end of the string

Returns:

  • ANSI escape sequence to match color



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# File 'lib/mdless/colors.rb', line 66

def last_color_code
  m = scan(ESCAPE_REGEX)

  em = ['0']
  fg = nil
  bg = nil
  rgbf = nil
  rgbb = nil

  m.each do |c|
    case c
    when '0'
      em = ['0']
      fg, bg, rgbf, rgbb = nil
    when /^[34]8/
      case c
      when /^3/
        fg = nil
        rgbf = c
      when /^4/
        bg = nil
        rgbb = c
      end
    else
      c.split(/;/).each do |i|
        x = i.to_i
        if x <= 9
          em << x
        elsif x >= 30 && x <= 39
          rgbf = nil
          fg = x
        elsif x >= 40 && x <= 49
          rgbb = nil
          bg = x
        elsif x >= 90 && x <= 97
          rgbf = nil
          fg = x
        elsif x >= 100 && x <= 107
          rgbb = nil
          bg = x
        end
      end
    end
  end

  escape = "\e[#{em.join(';')}m"
  escape += "\e[#{rgbb}m" if rgbb
  escape += "\e[#{rgbf}m" if rgbf
  escape + "\e[#{[fg, bg].delete_if(&:nil?).join(';')}m"
end

#size_clean ⇒ Object 



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# File 'lib/mdless/colors.rb', line 183

def size_clean
  self.uncolor.size
end

#uncolor ⇒ Object 



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# File 'lib/mdless/colors.rb', line 57

def uncolor
  self.gsub(/\e\[[\d;]+m/,'')
end

#uncolor! ⇒ Object 



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# File 'lib/mdless/colors.rb', line 179

def uncolor!
  self.replace self.uncolor
end

#wrap(width = 78, foreground = :x) ⇒ Object 



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# File 'lib/mdless/colors.rb', line 187

def wrap(width=78,foreground=:x)

  if self.uncolor =~ /(^([%~] |\s*>)| +[=\-]{5,})/
    return self
  end

  visible_width = 0
  lines = []
  line = ''
  last_ansi = ''

  line += self.match(/^\s*/)[0].gsub(/\t/,'    ')
  input = self.dup # .gsub(/(\w-)(\w)/,'\1 \2')
  input.split(/\s+/).each do |word|
    last_ansi = line.scan(/\e\[[\d;]+m/)[-1] || ''
    if visible_width + word.size_clean >= width
      lines << line + xc(foreground)
      visible_width = word.size_clean
      line = last_ansi + word
    elsif line.empty?
      visible_width = word.size_clean
      line = last_ansi + word
    else
      visible_width += word.size_clean + 1
      line << " " << last_ansi + word
    end
   end
   lines << line + self.match(/\s*$/)[0] + xc(foreground) if line
  return lines.join("\n") # .gsub(/\- (\S)/,'-\1')
end