node_modules/stylus/lib/functions/index.styl

called-from = ()
vendors = moz webkit o ms official
// stringify the given arg
-string(arg)
  type(arg) + ' ' + arg
// require a color
require-color(color)
  unless color is a 'color'
    error('RGB or HSL value expected, got a ' + -string(color))
// require a unit
require-unit(n)
  unless n is a 'unit'
    error('unit expected, got a ' + -string(n))
// require a string
require-string(str)
  unless str is a 'string' or str is a 'ident'
    error('string expected, got a ' + -string(str))
// Math functions
abs(n) { math(n, 'abs') }
min(a, b) { a < b ? a : b }
max(a, b) { a > b ? a : b }
// Trigonometrics
PI = -math-prop('PI')
radians-to-degrees(angle)
  angle * (180 / PI)
degrees-to-radians(angle)
  unit(angle * (PI / 180),'')
sin(n)
  n = degrees-to-radians(n) if unit(n) == 'deg'
  round(math(n, 'sin'), 9)
cos(n)
  n = degrees-to-radians(n) if unit(n) == 'deg'
  round(math(n, 'cos'), 9)
// Rounding Math functions
ceil(n, precision = 0)
  multiplier = 10 ** precision
  math(n * multiplier, 'ceil') / multiplier
floor(n, precision = 0)
  multiplier = 10 ** precision
  math(n * multiplier, 'floor') / multiplier
round(n, precision = 0)
  multiplier = 10 ** precision
  math(n * multiplier, 'round') / multiplier
// return the sum of the given numbers
sum(nums)
  sum = 0
  sum += n for n in nums
// return the average of the given numbers
avg(nums)
  sum(nums) / length(nums)
// return a unitless number, or pass through
remove-unit(n)
  if typeof(n) is "unit"
    unit(n, "")
  else
    n
// convert a percent to a decimal, or pass through
percent-to-decimal(n)
  if unit(n) is "%"
    remove-unit(n) / 100
  else
    n
// check if n is an odd number
odd(n)
  1 == n % 2
// check if n is an even number
even(n)
  0 == n % 2
// check if color is light
light(color)
  lightness(color) >= 50%
// check if color is dark
dark(color)
  lightness(color) < 50%
// desaturate color by amount
desaturate(color, amount)
  adjust(color, 'saturation', - amount)
// saturate color by amount
saturate(color = '', amount = 100%)
  if color is a 'color'
    adjust(color, 'saturation', amount)
  else
    unquote( "saturate(" + color + ")" )
// darken by the given amount
darken(color, amount)
  adjust(color, 'lightness', - amount)
// lighten by the given amount
lighten(color, amount)
  adjust(color, 'lightness', amount)
// decrease opacity by amount
fade-out(color, amount)
  color - rgba(black, percent-to-decimal(amount))
// increase opacity by amount
fade-in(color, amount)
  color + rgba(black, percent-to-decimal(amount))
// spin hue by a given amount
spin(color, amount)
  color + unit(amount, deg)
// mix two colors by a given amount
mix(color1, color2, weight = 50%)
  unless weight in 0..100
    error("Weight must be between 0% and 100%")
  if length(color1) == 2
    weight = color1[0]
    color1 = color1[1]
  else if length(color2) == 2
    weight = 100 - color2[0]
    color2 = color2[1]
  require-color(color1)
  require-color(color2)
  p = unit(weight / 100, '')
  w = p * 2 - 1
  a = alpha(color1) - alpha(color2)
  w1 = (((w * a == -1) ? w : (w + a) / (1 + w * a)) + 1) / 2
  w2 = 1 - w1
  channels = (red(color1) red(color2)) (green(color1) green(color2)) (blue(color1) blue(color2))
  rgb = ()
  for pair in channels
    push(rgb, floor(pair[0] * w1 + pair[1] * w2))
  a1 = alpha(color1) * p
  a2 = alpha(color2) * (1 - p)
  alpha = a1 + a2
  rgba(rgb[0], rgb[1], rgb[2], alpha)
// invert colors, leave alpha intact
invert(color = '')
  if color is a 'color'
    rgba(#fff - color, alpha(color))
  else
    unquote( "invert(" + color + ")" )
// give complement of the given color
complement( color )
  spin( color, 180 )
// give grayscale of the given color
grayscale( color = '' )
  if color is a 'color'
    desaturate( color, 100% )
  else
    unquote( "grayscale(" + color + ")" )
// mix the given color with white
tint( color, percent )
  mix( white, color, percent )
// mix the given color with black
shade( color, percent )
  mix( black, color, percent )
// return the last value in the given expr
last(expr)
  expr[length(expr) - 1]
// return keys in the given pairs or object
keys(pairs)
  ret = ()
  if type(pairs) == 'object'
    for key in pairs
      push(ret, key)
  else
    for pair in pairs
      push(ret, pair[0]);
  ret
// return values in the given pairs or object
values(pairs)
  ret = ()
  if type(pairs) == 'object'
    for key, val in pairs
      push(ret, val)
  else
    for pair in pairs
      push(ret, pair[1]);
  ret
// join values with the given delimiter
join(delim, vals...)
  buf = ''
  vals = vals[0] if length(vals) == 1
  for val, i in vals
    buf += i ? delim + val : val
// add a CSS rule to the containing block
// - This definition allows add-property to be used as a mixin
// - It has the same effect as interpolation but allows users
//   to opt for a functional style
add-property-function = add-property
add-property(name, expr)
  if mixin
    {name} expr
  else
    add-property-function(name, expr)
prefix-classes(prefix)
  -prefix-classes(prefix, block)
// Caching mixin, use inside your functions to enable caching by extending.
$stylus_mixin_cache = {}
cache()
  $key = (current-media() or 'no-media') + '__' + called-from[0] + '__' + arguments
  if $key in $stylus_mixin_cache
    @extend {"$cache_placeholder_for_" + $stylus_mixin_cache[$key]}
  else if 'cache' in called-from
    {block}
  else
    $id = length($stylus_mixin_cache)
    &,
    /$cache_placeholder_for_{$id}
      $stylus_mixin_cache[$key] = $id
      {block}
// Percentage function to convert a number, e.g. ".45", into a percentage, e.g. "45%"
percentage(num)
  return unit(num * 100, '%')
// Returns the position of a `value` within a `list`
index(list, value)
  for val, i in list
    return i if val == value