/**
 * Navigator - a cursor over a bounded list with viewport tracking
 *
 * Used for both:
 * - List navigation (process selection) - wraps around
 * - Scroll navigation (content viewing) - clamps to bounds
 */
export type NavigatorOptions = {
    getLength: () => number;
    wrap: boolean;
    onMove?: () => void;
};
export type Navigator = {
    readonly position: number;
    readonly viewportOffset: number;
    up(step?: number): void;
    down(step?: number): void;
    pageUp(pageSize: number, viewportSize?: number): void;
    pageDown(pageSize: number, viewportSize?: number): void;
    toStart(): void;
    toEnd(): void;
    ensureVisible(viewportSize: number): void;
    clampViewport(viewportSize: number): boolean;
    setPosition(position: number): void;
    reset(): void;
};
export declare function createNavigator(options: NavigatorOptions): Navigator;