import { GRID_PROPERTY_TYPES } from "@egjs/grid";
import { GROUP_TYPE } from "./consts";
import { GroupManagerStatus } from "./GroupManager";
import InfiniteGrid from "./InfiniteGrid";
import { InfiniteGridItem, InfiniteGridItemStatus } from "./InfiniteGridItem";
import { CategorizedGroup, InfiniteGridGroup, InfiniteGridInsertedItems, InfiniteGridItemInfo, RenderingOptions } from "./types";
export declare function isWindow(el: Window | Element): el is Window;
export declare function isNumber(val: any): val is number;
export declare function isString(val: any): val is string;
export declare function isObject(val: any): val is object;
export declare function flat<T>(arr: T[][]): T[];
export declare function splitOptions(options: Record<string, any>): {
    gridOptions: Record<string, any>;
};
export declare function splitGridOptions(options: Record<string, any>): {
    gridOptions: Record<string, any>;
};
export declare function categorize<Item extends InfiniteGridItemInfo = InfiniteGridItem>(items: Item[]): CategorizedGroup<Item>[];
export declare function getNextCursors(prevKeys: Array<string | number>, nextKeys: Array<string | number>, prevStartCursor: number, prevEndCursor: number): {
    startCursor: number;
    endCursor: number;
};
export declare function splitVirtualGroups<Group extends {
    type: GROUP_TYPE;
    groupKey: string | number;
}>(groups: Group[], direction: "start" | "end", nextGroups: CategorizedGroup<InfiniteGridItemStatus>[]): Group[];
export declare function getFirstRenderingItems(nextItems: InfiniteGridItemStatus[], horizontal: boolean): InfiniteGridItem[];
export declare function getRenderingItemsByStatus(groupManagerStatus: GroupManagerStatus, nextItems: InfiniteGridItemStatus[], usePlaceholder: boolean, horizontal: boolean): InfiniteGridItem[];
export declare function mountRenderingItems(items: InfiniteGridItemInfo[], options: RenderingOptions): void;
export declare function getRenderingItems(items: InfiniteGridItemInfo[], options: RenderingOptions): InfiniteGridItem[];
export declare function InfiniteGridGetterSetter(component: {
    prototype: InfiniteGrid<any>;
    propertyTypes: typeof GRID_PROPERTY_TYPES;
}): void;
export declare function makeKey(registeredKeys: Record<string, any>): string;
export declare function convertHTMLtoElement(html: string): HTMLElement[];
export declare function convertInsertedItems(items: InfiniteGridInsertedItems, groupKey?: string | number): InfiniteGridItemInfo[];
export declare function toArray(nodes: HTMLCollection): HTMLElement[];
export declare function toArray<T>(nodes: {
    length: number;
    [key: number]: T;
}): T[];
export declare function findIndex<T>(arr: T[], callback: (value: T, index: number) => boolean): number;
export declare function findLastIndex<T>(arr: T[], callback: (value: T, index: number) => boolean): number;
export declare function getItemInfo(info: InfiniteGridItemInfo): InfiniteGridItemInfo;
export declare function setPlaceholder(item: InfiniteGridItem, info: InfiniteGridItemStatus): void;
export declare function isFlatOutline(start: number[], end: number[]): boolean;
export declare function range(length: number): number[];
export declare function flatGroups(groups: InfiniteGridGroup[]): InfiniteGridItem[];
export declare function filterVirtuals<T extends InfiniteGridItem | InfiniteGridGroup>(items: T[], includePlaceholders?: boolean): T[];
/**
 * Decorator that makes the method of InfiniteGrid available in the framework.
 * @ko 프레임워크에서 InfiniteGrid의 메소드를 사용할 수 있게 하는 데코레이터.
 * @private
 * @example
 * ```js
 * import { withInfiniteGridMethods } from "@egjs/infinitegrid";
 *
 * class Grid extends React.Component<Partial<InfiniteGridProps & InfiniteGridOptions>> {
 *   &#64;withInfiniteGridMethods
 *   private grid: NativeGrid;
 * }
 * ```
 */
export declare const withInfiniteGridMethods: (prototype: any, memberName: string) => void;