import type { DropdownNode } from '../Dropdown.types';
export declare enum Actions {
    Close = 0,
    CloseSelect = 1,
    First = 2,
    Last = 3,
    Next = 4,
    Open = 5,
    PageDown = 6,
    PageUp = 7,
    Previous = 8,
    Select = 9,
    Type = 10,
    OpenSub = 11,
    CloseSub = 12
}
export declare enum Keys {
    Home = "Home",
    ArrowUp = "ArrowUp",
    ArrowDown = "ArrowDown",
    ArrowLeft = "ArrowLeft",
    ArrowRight = "ArrowRight",
    Enter = "Enter",
    Space = " ",
    End = "End",
    Backspace = "Backspace",
    Clear = "Clear",
    PageUp = "PageUp",
    PageDown = "PageDown",
    Escape = "Escape"
}
/**
 * Возвращает экшн в соответствии с нажатой клавишей.
 */
export declare const getActionFromKey: (event: KeyboardEvent, isOpen?: boolean | undefined) => Actions | null;
export declare const getUpdatedIndex: (action: Actions, index: number, items: DropdownNode[]) => number;
export declare const filterOptions: (options: string[] | undefined, filter: string, exclude?: string[]) => string[];
export declare const getIndexByLetter: (options: string[], filter: string, startIndex?: number) => number;
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