newsupernova/vendor/magento/theme-adminhtml-backend/web/mui/clearless/_sprites.less

// /**
//  * Copyright © Magento, Inc. All rights reserved.
//  * See COPYING.txt for license details.
//  */

// ==============================================
// Sprite helpers
// ==============================================

.sprite(@x, @y, @sprite-image:@sprite-image, @sprite-grid:@sprite-grid) {
    .sprite-image(@sprite-image);
    .sprite-pos(@x, @y, @sprite-grid);
}

.sprite-sized(@x, @y, @size, @sprite-image:@sprite-image, @sprite-grid:@sprite-grid) when not (isnumber(@sprite-image)) {
    .sprite(@x, @y, @sprite-image, @sprite-grid);
    .size(@size);
}

.sprite-sized(@x, @y, @width, @height, @sprite-image:@sprite-image, @sprite-grid:@sprite-grid) when (isnumber(@height)) {
    .sprite(@x, @y, @sprite-image, @sprite-grid);
    .size(@width,@height);
}

.sprite-ir(@x, @y, @size, @sprite-image:@sprite-image, @sprite-grid:@sprite-grid) when not (isnumber(@sprite-image)) {
    .ir();
    .sprite(@x, @y, @sprite-image, @sprite-grid);
    .size(@size);
}

.sprite-ir(@x, @y, @width, @height, @sprite-image:@sprite-image, @sprite-grid:@sprite-grid) when (isnumber(@height)) {
    .ir();
    .sprite(@x, @y, @sprite-image, @sprite-grid);
    .size(@width,@height);
}

.sprite-image(@sprite-image:@sprite-image) {
    background-image: url(@sprite-image);
    background-repeat: no-repeat;
}

.sprite-pos(@x, @y, @sprite-grid:@sprite-grid) {
    background-position: -(@x*@sprite-grid*1px)  -(@y*@sprite-grid*1px);
}

.sprite-pos-sized(@x, @y, @size, @sprite-grid:@sprite-grid) when not (isnumber(@sprite-image)) {
    .sprite-pos(@x, @y, @sprite-grid);
    .size(@size);
}

.sprite-pos-sized(@x, @y, @width, @height, @sprite-grid:@sprite-grid) when (isnumber(@height)) {
    .sprite-pos(@x, @y, @sprite-grid);
    .size(@width,@height);
}