@import shared

// These defaults make the arguments optional for this mixin
// If you like, set different defaults in your project

$default-text-shadow-color: #aaa !default
$default-text-shadow-h-offset: 0px !default
$default-text-shadow-v-offset: 0px !default
$default-text-shadow-blur: 1px !default
$default-text-shadow-spread: false !default

// Provides cross-browser text shadows when one or more shadows are needed.
// Each shadow argument should adhere to the standard css3 syntax for the
// text-shadow property.
//
// Note: if any shadow has a spread parameter, this will cause the mixin
// to emit the shadow declaration twice, first without the spread,
// then with the spread included. This allows you to progressively
// enhance the browsers that do support the spread parameter.
=text-shadow($shadow-1: default, $shadow-2: false, $shadow-3: false, $shadow-4: false, $shadow-5: false, $shadow-6: false, $shadow-7: false, $shadow-8: false, $shadow-9: false, $shadow-10: false)
  @if $shadow-1 == default
    $shadow-1: compact($default-text-shadow-h-offset $default-text-shadow-v-offset $default-text-shadow-blur $default-text-shadow-spread $default-text-shadow-color)
  $shadows-without-spread: join((), (), comma)
  $shadows: join((), (), comma)
  $has-spread: false
  @each $shadow in compact($shadow-1, $shadow-2, $shadow-3, $shadow-4, $shadow-5, $shadow-6, $shadow-7, $shadow-8, $shadow-9, $shadow-10)
    @if length($shadow) > 4
      $has-spread: true
      $shadows-without-spread: append($shadows-without-spread, nth($shadow, 1) nth($shadow, 2) nth($shadow, 3) nth($shadow, 5))
      $shadows: append($shadows, $shadow)
    else
      $shadows-without-spread: append($shadows-without-spread, $shadow)
      $shadows: append($shadows, $shadow)
  @if $has-spread
    text-shadow: $shadows-without-spread
  text-shadow: $shadows

// Provides a single cross-browser CSS text shadow.
//
// Provides sensible defaults for the color, horizontal offset, vertical offset, blur, and spread
// according to the configuration defaults above.
=single-text-shadow($hoff: false, $voff: false, $blur: false, $spread: false, $color: false)
  // A lot of people think the color comes first. It doesn't.
  @if type-of($hoff) == color
    $temp-color: $hoff
    $hoff: $voff
    $voff: $blur
    $blur: $spread
    $spread: $color
    $color: $temp-color
  // Can't rely on default assignment with multiple supported argument orders.
  $hoff: if($hoff, $hoff, $default-text-shadow-h-offset)
  $voff: if($voff, $voff, $default-text-shadow-v-offset)
  $blur: if($blur, $blur, $default-text-shadow-blur)
  $spread: if($spread, $spread, $default-text-shadow-spread)
  $color: if($color, $color, $default-text-shadow-color)
  // We don't need experimental support for this property.
  @if $color == none or $hoff == none
    +text-shadow(none)
  @else
    +text-shadow(compact($hoff $voff $blur $spread $color))