/**
 * focus — focus management as RETAINED STATE, keyed by a stable component
 * identity. Tab order and keyboard routing.
 */
import { type Disposable } from '../events/index.js';
import type { KeyEvent } from '../input/index.js';
export interface Focusable {
    readonly key: string;
    readonly tabIndex: number;
    readonly disabled?: boolean;
    onKey?(e: KeyEvent): boolean;
}
export interface FocusManager {
    register(entry: Focusable): Disposable;
    focus(key: string): void;
    focusNext(): void;
    focusPrev(): void;
    blur(): void;
    isFocused(key: string): boolean;
    readonly activeKey: string | undefined;
    onChange(cb: (key: string | undefined) => void): Disposable;
    routeKey(e: KeyEvent): boolean;
}
export declare function createFocusManager(): FocusManager;
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