Module: UnderOs::Color::Converter

Extended by:
Converter
Included in:
Converter
Defined in:
lib/under_os/color.rb

Constant Summary collapse

IOS_COLORS = 
%w[
  black
  darkGray
  lightGray
  white
  gray
  red
  green
  blue
  cyan
  yellow
  magenta
  orange
  purple
  brown
  clear
].freeze
HTML_COLORS = 
{
  maroon:  '#800000',
  olive:   '#808000',
  fuchsia: '#ff00ff',
  lime:    '#00ff00',
  navy:    '#000080',
  aqua:    '#00ffff',
  teal:    '#008080',
  silver:  '#c0c0c0',
}.freeze

Instance Method Summary collapse

Instance Method Details

#color_from_array(r, g, b, a = 1.0) ⇒ Object 



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# File 'lib/under_os/color.rb', line 87

def color_from_array(r,g,b,a=1.0)
  r = r / 255.0 if r.is_a?(Integer) || r > 1.0
  g = g / 255.0 if g.is_a?(Integer) || g > 1.0
  b = b / 255.0 if b.is_a?(Integer) || b > 1.0

  UIColor.colorWithRed(r, green: g, blue: b, alpha: a)
end

#color_from_param(param) ⇒ Object

0.0..1.0



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# File 'lib/under_os/color.rb', line 119

def color_from_param(param) # 0.0..1.0
  color_from_array *param_2_rgb(param)
end

#color_from_string(name) ⇒ Object 



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# File 'lib/under_os/color.rb', line 95

def color_from_string(name)
  name = name.downcase.strip
  name = 'clear'     if name == 'transparent'
  name = 'darkGray'  if name == 'darkgray'
  name = 'lightGray' if name == 'lightgray'

  return UIColor.send("#{name}Color") if IOS_COLORS.include?(name)

  name = HTML_COLORS[name] || name
  name = "#" + name[1]*2 + name[2]*2 + name[3]*2 if name =~ /^#[abcdef0-9]{3}$/

  r, g, b, a = if name =~ /^#[abcdef0-9]{6}$/
    hex_2_rgb(name)
  elsif m = name.match(/^rgb\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d*)\s*\)$/)
    [m[1].to_i, m[2].to_i, m[3].to_i]
  elsif m = name.match(/^rgba\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d*)\s*,\s*([\d\.]+)\s*\)$/)
    [m[1].to_i, m[2].to_i, m[3].to_i, m[4].to_f]
  else
    raise "Malformed color spec: #{name.inspect}"
  end

  color_from_array(r, g, b, a || 1.0)
end

#hex_2_rgb(hex) ⇒ Object 



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# File 'lib/under_os/color.rb', line 123

def hex_2_rgb(hex)
  int = hex[1..-1].to_i(16)

  r   = (int & 0xFF0000) >> 16
  g   = (int & 0xFF00)   >> 8
  b   = (int & 0xFF)

  [r, g, b]
end

#param_2_rgb(a) ⇒ Object

0.0..1.0



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# File 'lib/under_os/color.rb', line 133

def param_2_rgb(a) # 0.0..1.0
  x = 1 / 6.0
  s = a % x / x
  r = 1 - s

  if    a < x     then [1.0, s,   0.0]
  elsif a < x * 2 then [r,   1.0, 0.0]
  elsif a < x * 3 then [0.0, 1.0, s]
  elsif a < x * 4 then [0.0, r,   1.0]
  elsif a < x * 5 then [s,   0.0, 1.0]
  else                 [1.0, 0.0, r]
  end
end

#ui_color_from(*args) ⇒ Object 



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# File 'lib/under_os/color.rb', line 74

def ui_color_from(*args)
  origin = args.size == 1 ? args[0] : args

  if    origin.is_a?(UIColor) then origin
  elsif origin.is_a?(Array)   then color_from_array(*origin)
  elsif origin.is_a?(String)  then color_from_string(origin)
  elsif origin.is_a?(Symbol)  then color_from_string(origin.to_s)
  elsif origin.is_a?(Float)   then color_from_param(origin)
  elsif origin.is_a?(Integer) then color_from_param(origin / 100.0)
  else                             UIColor.redColor # fallback
  end
end