Compass/compass

// Background Origin
@import "compass/support";

// The the user threshold for background-origin support. Defaults to `$critical-usage-threshold`
$background-origin-threshold: $critical-usage-threshold !default;


// The default background-origin: [border-box | padding-box | content-box]
$default-background-origin: content-box !default;


// Set the origin of the background (image and color) at the edge of the padding, border, or content.
//
//     $origin... : [padding-box | border-box | content-box]
@mixin background-origin($origin...) {
  $output: ();
  $deprecated: ();

  @if (length($origin) > 0) {
    @each $layer in $origin {
      $output: append($output, unquote($layer), comma);
      $deprecated: append($deprecated, legacy-box($layer), comma);
    }
  } @else {
    $output: $default-background-origin;
    $deprecated: legacy-box($default-background-origin);
  }

  @include with-each-prefix(background-img-opts, $background-origin-threshold) {
    @if $current-prefix == -moz or $current-prefix == -webkit {
      // Legacy versions of Mozilla support a different syntax, prefixed.
      @include prefix-prop(background-origin, $deprecated)
    } @else {
      @include prefix-prop(background-origin, $output)
    }
  }
}