// @doc off
// These defaults make the arguments optional for this mixin
// If you like, set different defaults before importing.
// @doc on

@import "shared";
@import "compass/utilities/compact";

// The default color for box shadows
$default-box-shadow-color: #333333 !default;

// The default horizontal offset. Positive is to the right.
$default-box-shadow-h-offset: 0px !default;

// The default vertical offset. Positive is down.
$default-box-shadow-v-offset: 0px !default;

// The default blur length.
$default-box-shadow-blur: 5px !default;

// The default spread length.
$default-box-shadow-spread : false !default;

// The default shadow inset: inset or false (for standard shadow).
$default-box-shadow-inset : false !default;

// Provides cross-browser for Webkit, Gecko, and CSS3 box shadows when one or more box
// shadows are needed.
// Each shadow argument should adhere to the standard css3 syntax for the
// box-shadow property.
@mixin box-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 {
    $shadow-1 : -compass-space-list(compact(if($default-box-shadow-inset, inset, false), $default-box-shadow-h-offset, $default-box-shadow-v-offset, $default-box-shadow-blur, $default-box-shadow-spread, $default-box-shadow-color));
  }
  $shadow : compact($shadow-1, $shadow-2, $shadow-3, $shadow-4, $shadow-5, $shadow-6, $shadow-7, $shadow-8, $shadow-9, $shadow-10);
  @include experimental(box-shadow, $shadow,
    -moz, -webkit, not -o, not -ms, not -khtml, official
  );
}

// Provides a single cross-browser CSS box shadow for Webkit, Gecko, and CSS3.
// Includes default arguments for color, horizontal offset, vertical offset, blur length, spread length, and inset.
@mixin single-box-shadow(
  $color  : $default-box-shadow-color,
  $hoff   : $default-box-shadow-h-offset,
  $voff   : $default-box-shadow-v-offset,
  $blur   : $default-box-shadow-blur,
  $spread : $default-box-shadow-spread,
  $inset  : $default-box-shadow-inset
) {
  @if not ($inset == true or $inset == false or $inset == inset) {
    @warn "$inset expected to be true or the inset keyword. Got #{$inset} instead. Using: inset";
  }

  @if $color == none {
    @include box-shadow(none);
  } @else {
    $full   : $hoff $voff;
    @if $blur   { $full: $full $blur;   }
    @if $spread { $full: $full $spread; }
    @if $color  { $full: $full $color;  }
    @if $inset  { $full: inset $full;   }
    @include box-shadow($full);
  }
}
