import { BaseTransformation } from './_base';
/**
 * The ExtenderTransformation class implements algorithms for transforming coordinates while the
 * selection is being extended or shrunk. Table size defines the bounds for the selection extent.
 *
 * @class ExtenderTransformation
 * @private
 */
export declare class ExtenderTransformation extends BaseTransformation {
    /**
     * Calculates offset coordinates for extender selection.
     *
     * @returns {{x: number, y: number}}
     */
    calculateOffset(): {
        x: number;
        y: number;
    };
    /**
     * Gets the count of renderable rows for extender transformation.
     * Extender transformation operates on the full table size.
     *
     * @returns {number}
     */
    countRenderableRows(): number;
    /**
     * Gets the count of renderable columns for extender transformation.
     * Extender transformation operates on the full table size.
     *
     * @returns {number}
     */
    countRenderableColumns(): number;
    /**
     * Changes the behavior of the transformation logic by not switching the selection layer
     * when the selection is out of range.
     *
     * @returns {boolean}
     */
    shouldSwitchSelectionLayer(): boolean;
}