import * as _angular_core from '@angular/core';
import { TemplateRef, OnDestroy } from '@angular/core';
import * as _ng_nest_ui_core from '@ng-nest/ui/core';
import { XNumber } from '@ng-nest/ui/core';
import { XPortalOverlayRef } from '@ng-nest/ui/portal';

/**
 * BackTop
 * @selector x-back-top
 * @decorator component
 */
declare const XBackTopPrefix = "x-back-top";
declare const XBackTopProperty_base: new () => {
    config: _ng_nest_ui_core.XBackTopConfig | undefined;
};
/**
 * BackTop Property
 */
declare class XBackTopProperty extends XBackTopProperty_base {
    /**
     * @zh_CN 距离右边的距离
     * @en_US Distance to the right
     */
    readonly right: _angular_core.InputSignalWithTransform<string, XNumber>;
    /**
     * @zh_CN 距离底部的距离
     * @en_US Distance from bottom
     */
    readonly bottom: _angular_core.InputSignalWithTransform<string, XNumber>;
    /**
     * @zh_CN 滚动多少高度后显示
     * @en_US Display after scrolling how much height
     */
    readonly visibilityHeight: _angular_core.InputSignalWithTransform<number, XNumber>;
    /**
     * @zh_CN 内容模板
     * @en_US Content template
     */
    readonly template: _angular_core.InputSignal<TemplateRef<any> | undefined>;
    /**
     * @zh_CN 滚动的元素
     * @en_US Scroll element
     */
    readonly target: _angular_core.InputSignal<string | HTMLElement | undefined>;
    static ɵfac: _angular_core.ɵɵFactoryDeclaration<XBackTopProperty, never>;
    static ɵcmp: _angular_core.ɵɵComponentDeclaration<XBackTopProperty, "x-back-top-property", never, { "right": { "alias": "right"; "required": false; "isSignal": true; }; "bottom": { "alias": "bottom"; "required": false; "isSignal": true; }; "visibilityHeight": { "alias": "visibilityHeight"; "required": false; "isSignal": true; }; "template": { "alias": "template"; "required": false; "isSignal": true; }; "target": { "alias": "target"; "required": false; "isSignal": true; }; }, {}, never, never, true, never>;
}

declare class XBackTopComponent extends XBackTopProperty implements OnDestroy {
    backTopTpl: _angular_core.Signal<TemplateRef<void>>;
    visiable: _angular_core.WritableSignal<boolean>;
    scrolling: _angular_core.WritableSignal<boolean>;
    portalRef: XPortalOverlayRef<any>;
    private doc;
    private portal;
    private viewContainerRef;
    private unSubject;
    scroll: _angular_core.Signal<Element | (Window & typeof globalThis) | null>;
    constructor();
    ngOnDestroy(): void;
    onBackTop(): void;
    private addEvent;
    private scrollTop;
    private setVisible;
    private scrollTo;
    private setScrollTop;
    static ɵfac: _angular_core.ɵɵFactoryDeclaration<XBackTopComponent, never>;
    static ɵcmp: _angular_core.ɵɵComponentDeclaration<XBackTopComponent, "x-back-top", never, {}, {}, never, never, true, never>;
}

declare class XBackTopModule {
    static ɵfac: _angular_core.ɵɵFactoryDeclaration<XBackTopModule, never>;
    static ɵmod: _angular_core.ɵɵNgModuleDeclaration<XBackTopModule, never, [typeof XBackTopComponent], [typeof XBackTopComponent]>;
    static ɵinj: _angular_core.ɵɵInjectorDeclaration<XBackTopModule>;
}

export { XBackTopComponent, XBackTopModule, XBackTopPrefix, XBackTopProperty };