Class: String::Colorizer

Inherits:
Object show all
Includes:
Singleton
Defined in:
lib/babushka/colorizer.rb

Constant Summary collapse

HomeOffset = 
29
LightOffset = 
60
BGOffset = 
10
LightRegex = 
/^light_/
ColorRegex = 
/^(light_)?none|gr[ae]y|red|green|yellow|blue|pink|cyan|white$/
CtrlRegex = 
/^bold|underlined?|blink(ing)?|reversed?$/
ColorOffsets = 
{
  'none' => 0,
  'gray' => 61, 'grey' => 61,
  'red' => 2,
  'green' => 3,
  'yellow' => 4,
  'blue' => 5,
  'pink' => 6,
  'cyan' => 7,
  'white' => 8
}
CtrlOffsets = 
{
  'bold' => 1,
  'underline' => 4, 'underlined' => 4,
  'blink' => 5, 'blinking' => 5,
  'reverse' => 7, 'reversed' => 7
}

Instance Method Summary collapse

Instance Method Details

#bg_for(name) ⇒ Object 



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# File 'lib/babushka/colorizer.rb', line 48

def bg_for name
  # There's a hole in the table on bg=none, so we use BGOffset to the left
  offset = fg_for((name || '').sub(/^on_/, ''))
  offset + BGOffset unless offset == HomeOffset
end

#colorize(text, description) ⇒ Object 



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# File 'lib/babushka/colorizer.rb', line 32

def colorize text, description
  return text if Babushka::Base.task.opts[:"[no_]color"] == false

  terms = " #{description} ".gsub(' light ', ' light_').gsub(' on ', ' on_').strip.split(/\s+/)
  bg = terms.detect {|i| /on_#{ColorRegex}/ =~ i }
  fg = terms.detect {|i| ColorRegex =~ i }
  ctrl = terms.detect {|i| CtrlRegex =~ i }

  "\e[#{"0;#{fg_for(fg)};#{bg_for(bg) || ctrl_for(ctrl)}"}m#{text}\e[0m"
end

#ctrl_for(name) ⇒ Object 



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# File 'lib/babushka/colorizer.rb', line 54

def ctrl_for name
  CtrlOffsets[name] || HomeOffset
end

#fg_for(name) ⇒ Object 



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# File 'lib/babushka/colorizer.rb', line 43

def fg_for name
  light = name.gsub!(LightRegex, '') unless name.nil?
  (ColorOffsets[name] || 0) + HomeOffset + (light ? LightOffset : 0)
end