/**
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
 */
/**
 * fit content details: https://github.com/NG-ZORRO/ng-zorro-antd/pull/6154#issuecomment-745025554
 *
 * calc position x,y point
 *
 * CASE (width <= clientWidth && height <= clientHeight):
 *
 * ------------- clientWidth -------------
 * |                                     |
 * |        ------ width ------          |
 * |        |                 |          |
 * |        |                 |          |
 * client   height            |          |
 * Height   |                 |          |
 * |        |                 |          |
 * |        -------------------          |
 * |                                     |
 * |                                     |
 * ---------------------------------------
 * fixedPosition = { x: 0, y: 0 }
 *
 *
 *
 * CASE (width > clientWidth || height > clientHeight):
 *
 * ------------- clientWidth -------------
 * |        |                            |
 * |        top                          |
 * |        |                            |
 * |--left--|--------------- width -----------------
 * |        |                                      |
 * client   |                                      |
 * Height   |                                      |
 * |        |                                      |
 * |        |                                      |
 * |        height                                 |
 * |        |                                      |
 * ---------|                                      |
 *          |                                      |
 *          |                                      |
 *          |                                      |
 *          ----------------------------------------
 *
 *
 * - left || top > 0
 *   left -> 0 || top -> 0
 *
 * - (left + width) < clientWidth || (top + height) < clientHeight
 * - left | top + width | height < clientWidth | clientHeight -> Back left | top + width | height === clientWidth | clientHeight
 *
 * DEFAULT:
 * - hold position
 *
 */
export declare function getFitContentPosition(params: {
    width: number;
    height: number;
    left: number;
    top: number;
    clientWidth: number;
    clientHeight: number;
}): {
    x?: number;
    y?: number;
};
export declare function getOffset(node: HTMLElement): {
    left: number;
    top: number;
};
export declare function getClientSize(): {
    width: number;
    height: number;
};