Method: TCPDF#convertHTMLColorToDec

Defined in:
lib/tcpdf.rb

#convertHTMLColorToDec(color = "#FFFFFF") ⇒ Object Also known as: convert_html_color_to_dec

Returns an associative array (keys: R,G,B) from an html color name or a six-digit or three-digit hexadecimal color representation (i.e. #3FE5AA or #7FF).

@param string :color

html color

@return array

RGB color or empty array in case of error.

@access public


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# File 'lib/tcpdf.rb', line 7672

def convertHTMLColorToDec(color = "#FFFFFF")
  color = color.gsub(/[\s]*/, '') # remove extra spaces
  color = color.downcase
  if !(dotpos = color.index('.')).nil?
    # remove class parent (i.e.: color.red)
    color = color[(dotpos + 1)..-1]
  end
  if color.length == 0
    return []
  end
  returncolor = ActiveSupport::OrderedHash.new
  #  RGB ARRAY
  if color[0,3] == 'rgb' 
    codes = color.sub(/^rgb\(/, '')
    codes = codes.gsub(')', '')
    returncolor = codes.split(',', 3)
    returncolor[0] = returncolor[0].to_i
    returncolor[1] = returncolor[1].to_i
    returncolor[2] = returncolor[2].to_i
    return returncolor
  end
  # CMYK ARRAY
  if color[0,4] == 'cmyk' 
    codes = color.sub(/^cmyk\(/, '')
    codes = codes.gsub(')', '')
    returncolor[0] = returncolor[0].to_i
    returncolor[1] = returncolor[1].to_i
    returncolor[2] = returncolor[2].to_i
    returncolor[3] = returncolor[3].to_i
    return returncolor
  end
  # COLOR NAME
  if color[0].chr != "#"
    # decode color name
    if @@webcolor[color]
      color_code = @@webcolor[color]
    else
      return []
    end
  else
    color_code = color.sub(/^#/, "")
  end
  # RGB VALUE
  case color_code.length
  when 3
    # three-digit hexadecimal representation
    r = color_code[0]
    g = color_code[1]
    b = color_code[2]
    returncolor['R'] = (r + r).hex
    returncolor['G'] = (g + g).hex
    returncolor['B'] = (b + b).hex
  when 6
    # six-digit hexadecimal representation
    returncolor['R'] = color_code[0,2].hex
    returncolor['G'] = color_code[2,2].hex
    returncolor['B'] = color_code[4,2].hex
  else
    returncolor = []
  end
  return returncolor
end