
@function get-resource-path($path, $check-exists: true) {
  $leaf: file_join($current-resource-root, $path);
  $ret: none;

  @if $path {
    $ret: file_join($theme-resource-path, $leaf);

    @if $check-exists {
      //@if not theme_image_exists($image-search-path, $leaf) {
      //@warn "@get-resource-path -- resource not found: #{$path}";
      //$ret: none;
      //}
    }
  } @else {
    @warn "@get-resource-path: No arguments passed";
  }

  @return $ret;
}

/*
 * Method which inserts a full background-image property for a theme image.
 * It checks if the file exists and if it doesn't, it'll throw an error.
 * By default it will not include the background-image property if it is not found,
 * but this can be changed by changing the default value of $include-missing-images to
 * be true.
 */
@function theme-background-image($path, $extension: $image-extension, $nocheck: false) {
  $path: file_join($relative-image-path-for-uis, $path + '.' + $extension);
  $background-image: none;

  @if $path {
    @if $nocheck {
      $background-image: $path;
    } @else if theme_image_exists($image-search-path, $path) {
      $background-image: $path;
    } @else {
      @warn "@theme-background-image: Theme image not found: #{$path}";
      @if $include-missing-images {
        $background-image: $path;
      }
    }

    @if $background-image != none {
      $background-image: url(file_join($theme-resource-path, $path));
    }
  } @else {
    @warn "@theme-background-image: No arguments passed";
  }

  @return $background-image;
}

@function get-image-url($path, $extension: $image-extension, $nocheck: false) {
  @return theme-background-image($path, $extension, $nocheck);
}

@function ui-suffix($ui) {
    @return if($ui == null, '', '-' + $ui);
}

@function x($position) {
    @return parsebox($position, 1);
}
@function y($position) {
    @return parsebox($position, 2);
}

@function before($position) {
    @return parsebox($position, 1);
}
@function after($position) {
    @return parsebox($position, 2);
}

@function top($box) {
    @return parsebox($box, 1);
}
@function right($box) {
    @return parsebox($box, 2);
}
@function bottom($box) {
    @return parsebox($box, 3);
}
@function left($box) {
    @return parsebox($box, 4);
}
@function vertical($box) {
    @return top($box) + bottom($box);
}
@function horizontal($box) {
    @return left($box) + right($box);
}
@function boxmax($box) {
    @return max(max(top($box), right($box)), max(bottom($box), left($box)));
}
@function boxmin($box) {
    @return min(min(top($box), right($box)), min(bottom($box), left($box)));
}
@function rotate90($box) {
    @return left($box) top($box) right($box) bottom($box);
}
@function rotate180($box) {
    @return bottom($box) left($box) top($box) right($box);
}

@function rotate270($box) {
    @return right($box) bottom($box) left($box) top($box);
}
@function flip-vertical($box) {
    @return bottom($box) right($box) top($box) left($box);
}
@function flip-horizontal($box) {
    @return top($box) left($box) bottom($box) right($box);
}
@function rtl($box) {
    @return top($box) left($box) bottom($box) right($box);
}

@function rtl-background-position($pos) {
    $x: parsebox($pos, 1);
    $new-x: null;
    @if $x == right or $x == 100% {
        $new-x: 0;
    } @else if $x == 0 or $x == left {
        $new-x: right;
    } @else {
        $new-x: $x;
    }
    @return $new-x parsebox($pos, 2);
}

@function nopx ($value) {
    @if $value == 0 {
        @return 0;
    }
    @return $value / 1px;
}