Text-Shadow @mixin | Compass

_text-shadow-compass-mixin.scss

// ######################################################################
//                                                                     ##
//                            text-shadow()                            ##
//  =================================================================  ##
//  URL: http://compass-style.org/reference/compass/css3/text-shadow/  ##
//                                                                     ##
//  USAGE:                                                             ##
//  -----------------------------------------------------------------  ##
//  @include text-shadow(1px 1px 2px #333333);                         ##
//                                                                     ##
// ######################################################################

// Default variables
$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;
$default-text-shadow-color   : #aaaaaa!default;

@mixin text-shadow($shadow...) {
    $shadow: if(length($shadow) > 0, $shadow, default);
    $default: -compass-space-list(compact($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 $layer in $shadow {
        $layer: if($layer == "default", $default, $layer);
        @if length($layer) > 4 {
            $has-spread: true;
            $shadows-without-spread: append($shadows-without-spread, nth($layer, 1) nth($layer, 2) nth($layer, 3) nth($layer, 5));
            $shadows: append($shadows, $layer);
        }
        @else {
            $shadows-without-spread: append($shadows-without-spread, $layer);
            $shadows: append($shadows, $layer);
        }
    }
    @if $has-spread {
        text-shadow: $shadows-without-spread;
    }
    text-shadow: $shadows;
}