export interface ChatHistoryRailControllerLabels {
    newChat: string;
    showMore: string;
    showLess: string;
}
export interface UseChatHistoryRailControllerOptions<Item> {
    items: readonly Item[];
    onNewChat: () => void;
    labels: ChatHistoryRailControllerLabels;
    previewCount?: number;
    expandedCount?: number;
}
export interface ChatHistoryRailController<Item> {
    expanded: boolean;
    collapsedLimit: number;
    expandedLimit: number;
    visibleItems: Item[];
    canExpand: boolean;
    newChatLabel: string;
    disclosureLabel: string;
    onNewChat: () => void;
    toggleExpanded: () => void;
    resetExpanded: () => void;
}
export declare function useChatHistoryRailController<Item>({ items, onNewChat, labels, previewCount, expandedCount, }: UseChatHistoryRailControllerOptions<Item>): ChatHistoryRailController<Item>;
//# sourceMappingURL=useChatHistoryRailController.d.ts.map