/**
 * Handles the theme-related style operations.
 */
export declare class StylesHandler {
    #private;
    /**
     * Initializes a new instance of the `StylesHandler` class.
     *
     * @param {object} options The options for the `StylesHandler` instance.
     * @param {Core} options.hot The instance of the Handsontable.
     * @param {HTMLElement} options.rootElement The root element of the instance.
     * @param {Document} options.rootDocument The root document of the instance.
     * @param {function(string)} options.onThemeChange The callback function to be called when the theme changes.
     * @param {boolean} options.injectCoreCss Whether to inject the core styles into the document head.
     */
    constructor({ hot, rootElement, rootDocument, onThemeChange, injectCoreCss }: {
        hot: unknown;
        rootElement: HTMLElement;
        rootDocument: Document;
        onThemeChange?: Function;
        injectCoreCss?: boolean;
    });
    /**
     * Retrieves the value of a specified CSS variable.
     *
     * @param {string} variableName - The name of the CSS variable to retrieve.
     * @returns {number|null|undefined} The value of the specified CSS variable, or `undefined` if not found.
     */
    getCSSVariableValue(variableName: string): unknown;
    /**
     * Retrieves the computed style value for a specified CSS property of a `td` element.
     *
     * @param {string} cssProperty - The CSS property to retrieve the value for.
     * @returns {number|string|undefined} The value of the specified CSS property, or `undefined` if not found.
     */
    getStyleForTD(cssProperty: string): string;
    /**
     * Calculates the row height based on the current theme and CSS variables.
     *
     * @param {number} [visualRowIndex] The visual row index.
     * @returns {number} The calculated row height.
     */
    getDefaultRowHeight(visualRowIndex?: number): number | null;
    /**
     * Checks if the cells are using the `border-box` box-sizing model.
     *
     * @returns {boolean}
     */
    areCellsBorderBox(): boolean;
    /**
     * Applies the specified theme to the instance.
     *
     * @param {string|undefined|boolean} [themeName] - The name of the theme to apply.
     */
    useTheme(themeName: string | undefined | boolean): void;
    /**
     * Gets the name of the theme.
     *
     * @returns {string|undefined}
     */
    getThemeName(): string | undefined;
    /**
     * Clears all cached CSS variable values and computed styles.
     * This should be called when theme CSS variables are dynamically updated.
     */
    clearCache(): void;
}