Class: OSX::NSColor

Inherits:
Object
  • Object
show all
Defined in:
lib/textorize/color.rb

Constant Summary collapse

HTML4_KEYWORDS = 
{
  # taken from the CSS3 Color Module
  # http://www.w3.org/TR/css3-color/#html4
  # note that we don't support SVG color keywords
  'black' => from_rgb(0, 0, 0),
  'silver' => from_rgb(0xC0, 0xC0, 0xC0),
  'gray' => from_rgb(0x80, 0x80, 0x80),
  'white' => from_rgb(0xFF, 0xFF, 0xFF),
  'maroon' => from_rgb(0x80, 0, 0),
  'red' => from_rgb(0xFF, 0, 0),
  'purple' => from_rgb(0x80, 0, 0x80),
  'fuchsia' => from_rgb(0xFF, 0, 0xFF),
  'green' => from_rgb(0, 0x80, 0),
  'lime' => from_rgb(0, 0xFF, 0),
  'olive' => from_rgb(0x80, 0x80, 0),
  'yellow' => from_rgb(0xFF, 0xFF, 0),
  'navy' => from_rgb(0, 0, 0x80),
  'blue' => from_rgb(0, 0, 0xFF),
  'teal' => from_rgb(0, 0x80, 0x80),
  'aqua' => from_rgb(0, 0xFF, 0xFF),
  'transparent' => from_rgb(0, 0, 0, 0)
}

Class Method Summary collapse

Class Method Details

.from_css(str) ⇒ Object 



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# File 'lib/textorize/color.rb', line 34

def self.from_css(str)
  case str
  when /^#([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})$/i
    r = $1.to_i(16)
    g = $2.to_i(16)
    b = $3.to_i(16)
    from_rgb(r, g, b)
  when /^#([0-9a-f])([0-9a-f])([0-9a-f])$/i
    r = ($1*2).to_i(16)
    g = ($2*2).to_i(16)
    b = ($3*2).to_i(16)
    from_rgb(r, g, b)
  when /^rgb\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)$/
    r = $1.to_i
    g = $2.to_i
    b = $3.to_i
    from_rgb(r, g, b)
  when /^rgba\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d*(?:\.\d+))\s*\)$/
    r = $1.to_i
    g = $2.to_i
    b = $3.to_i
    a = $4.to_f
    from_rgb(r, g, b, a)
  else
    HTML4_KEYWORDS[str]
  end
rescue
  nil
end

.from_rgb(red, green, blue, alpha = 1.0) ⇒ Object 



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# File 'lib/textorize/color.rb', line 7

def self.from_rgb(red, green, blue, alpha=1.0)
  NSColor.colorWithDeviceRed_green_blue_alpha(red/255.0, green/255.0, blue/255.0, alpha)
end