_calcScalingSizeFromPointer(pointer, selectedCorner) {
      const isCornerTypeValid = cornerTypeValid(selectedCorner);

      return isCornerTypeValid && this._resizeCropZone(pointer, selectedCorner);
    }
Calc scaled size from mouse pointer with selected corner
@param {{x: number, y: number}} pointer - Mouse position
@param {string} selectedCorner - selected corner type
@returns {Object} Having left or(and) top or(and) width or(and) height.
@private