import { Order, SortConfig, SortOption, SortState, StkTableColumn, UniqKey } from '../types';

/** 是否空值 */
export declare function isEmptyValue(val: any, isNumber?: boolean): boolean;
/**
 * 对有序数组插入新数据
 *
 * 注意：不会改变原数组，返回新数组
 * @param sortState
 * @param sortState.dataIndex 排序的字段
 * @param sortState.order 排序顺序
 * @param sortState.sortType 排序方式
 * @param newItem 要插入的数据
 * @param targetArray 表格数据
 * @return targetArray 的浅拷贝
 */
export declare function insertToOrderedArray<T extends object>(sortState: SortState<T>, newItem: T, targetArray: T[], sortConfig?: SortConfig<T> & {
    customCompare?: (a: T, b: T) => number;
}): T[];
/**
 * 二分查找
 *  @param searchArray 查找数组
 *  @param compareCallback 比较函数，返回 -1|0|1
 */
export declare function binarySearch(searchArray: any[], compareCallback: (midIndex: number) => number): number;
/**
 * 字符串比较
 * @param a
 * @param b
 * @param type 类型
 * @param isNumber 是否是数字类型
 * @param localeCompare 是否 使用Array.prototyshpe.localeCompare
 * @return {number} <0: a < b, 0: a = b, >0: a > b
 */
export declare function strCompare(a: string, b: string, isNumber: boolean, localeCompare?: boolean): number;
/**
 * 表格排序抽离
 * 可以在组件外部自己实现表格排序，组件配置remote，使表格不排序。
 * 使用者在@sort-change事件中自行更改table props 'dataSource'完成排序。
 * TODO: key 唯一值，排序字段相同时，根据唯一值排序。
 *
 * sortConfig.defaultSort 会在order为null时生效
 * @param sortOption 列配置
 * @param order 排序方式
 * @param dataSource 排序的数组
 */
export declare function tableSort<T extends Record<string, any>>(sortOption: SortOption<T>, order: Order, dataSource: T[], sortConfig?: SortConfig<T>): T[];
/** 多级表头深度 从0开始为一级*/
export declare function howDeepTheHeader(arr: StkTableColumn<any>[], level?: number): number;
/** number width +px */
export declare function transformWidthToStr(width?: string | number): string | undefined;
export declare function getBrowsersVersion(browserName: string): number;
export declare function pureCellKeyGen(rowKey: UniqKey, colKey: UniqKey): string;
export declare function getClosestTr(target: HTMLElement): HTMLTableRowElement | null;
export declare function getClosestTh(target: HTMLElement): HTMLTableCellElement | null;
export declare function getClosestTd(target: HTMLElement): HTMLTableCellElement | null;
export declare function getClosestTrIndex(target: HTMLElement): number;
export declare function getClosestColKey(target: HTMLElement): string | undefined;
/**
 * 改进的节流函数，确保最后一个调用不会被丢弃
 * @param fn 要执行的函数
 * @param delay 延迟时间（毫秒）
 * @returns 节流处理后的函数
 */
export declare function throttle<T extends (...args: any[]) => any>(fn: T, delay: number): (...args: Parameters<T>) => void;
/**
 * Creates a requestAnimationFrame-based throttled function for smooth scrolling performance.
 * Multiple calls within a single frame are coalesced - only the last call is executed.
 * @param fn The function to throttle
 * @returns A throttled function that executes on the next animation frame
 */
export declare function rafThrottle<T extends (...args: any[]) => any>(fn: T): (...args: Parameters<T>) => void;
export declare function debounce<T extends (...args: any[]) => any>(fn: T, delay: number): (...args: Parameters<T>) => void;