import { Observable, ObservableInput } from 'rxjs';
export declare type IsVisibleProps<E> = {
    event: E;
    element: HTMLImageElement | HTMLDivElement;
    offset: number;
    scrollContainer?: HTMLElement;
};
export declare type SetLoadedImageProps = {
    element: HTMLImageElement | HTMLDivElement;
    imagePath: string;
    useSrcset: boolean;
};
export declare type SetErrorImageProps = {
    element: HTMLImageElement | HTMLDivElement;
    errorImagePath: string;
    useSrcset: boolean;
};
export declare type LoadImageProps = {
    element: HTMLImageElement | HTMLDivElement;
    imagePath: string;
    useSrcset: boolean;
};
export declare type Attributes<T = any> = {
    element: HTMLImageElement | HTMLDivElement;
    imagePath: string;
    defaultImagePath: string;
    errorImagePath: string;
    useSrcset: boolean;
    offset: number;
    scrollContainer?: HTMLElement;
    scrollObservable?: Observable<T>;
};
export declare type ObsEvent<T> = {
    event: T;
    attributes: Attributes;
};
export declare type IsVisibleFn<E> = (args: IsVisibleProps<E>, getWindow?: () => Window) => boolean;
export declare type LoadImageFn = (args: LoadImageProps) => ObservableInput<string>;
export declare type SetLoadedImageFn = (args: SetLoadedImageProps) => void;
export declare type SetErrorImageFn = (args: SetErrorImageProps) => void;
export declare type SetupFn = (attributes: Attributes) => void;
export declare type FinallyFn = (attributes: Attributes) => void;
export declare type GetObservableFn<E> = (attributes: Attributes) => Observable<E>;
export interface HookSet<E> {
    getObservable: GetObservableFn<E>;
    isVisible: IsVisibleFn<E>;
    loadImage: LoadImageFn;
    setLoadedImage: SetLoadedImageFn;
    setErrorImage: SetErrorImageFn;
    setup: SetupFn;
    finally: FinallyFn;
}
export interface ModuleOptions<T = any> extends Partial<HookSet<T>> {
    preset?: HookSet<T>;
}