export interface ScrollLockSnapshot {
    scrollX: number;
    scrollY: number;
    scrollbarWidth: number;
    documentElement: {
        overflow: string;
        overflowX: string;
        overflowY: string;
        position: string;
        top: string;
        left: string;
        width: string;
        paddingRight: string;
    };
    body: {
        overflow: string;
        overflowX: string;
        overflowY: string;
        position: string;
        top: string;
        left: string;
        width: string;
        paddingRight: string;
    };
}
export type ScrollLockMode = 'blocked' | 'free';
export declare const SCROLL_KEYS: ReadonlySet<string>;
export declare function resolveScrollLockMode(options?: {
    allowScroll?: unknown;
} | null): ScrollLockMode;
/**
 * @internal
 *
 * Classe interna do PoUserGuideService responsável por congelar o scroll do navegador
 * (`document.documentElement` e `document.body`) durante o
 * ciclo de vida de um tour conduzido pelo `driver.js` e por restaurar o estado original
 * de forma síncrona em qualquer caminho de saída.
 *
 */
export declare class PoUserGuideScrollLock {
    private active;
    private snapshot;
    private wheelListener;
    private touchListener;
    private keydownListener;
    isActive(): boolean;
    lock(): void;
    unlock(): void;
    private isBrowser;
    private captureSnapshot;
    private applyLockStyles;
    private restoreSnapshot;
    private isScrollKey;
    private isWithinEditableInPopover;
}