import { InjectionToken, Injector, OnChanges, OnDestroy, OnInit, SimpleChange, SimpleChanges, TemplateRef, ViewContainerRef } from '@angular/core';
import { Observable, Subscription } from 'rxjs';
import * as i0 from "@angular/core";
export interface PageRenderStrategy {
    shouldRender(type?: string): boolean | Observable<boolean>;
    onInit?(type?: string, injector?: Injector, context?: any): void;
    onDestroy?(type?: string, injector?: Injector, context?: any): void;
    onContextUpdate?(change?: SimpleChange): void;
}
export declare const PAGE_RENDER_STRATEGY: InjectionToken<PageRenderStrategy>;
export declare class PagePartDirective implements OnInit, OnDestroy, OnChanges {
    private templateRef;
    private viewContainer;
    private renderLogic;
    private injector;
    hasRendered: boolean;
    type: string;
    subscription: Subscription;
    context: any;
    set appPagePart(type: string);
    render: (shouldRender: boolean) => void;
    constructor(templateRef: TemplateRef<any>, viewContainer: ViewContainerRef, renderLogic: PageRenderStrategy, injector: Injector);
    ngOnChanges({ context }: SimpleChanges): void;
    ngOnInit(): void;
    ngOnDestroy(): void;
    shouldRender(type: string): Observable<boolean>;
    protected createRenderStream(type: string): void;
    protected clearSubscription(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<PagePartDirective, [null, null, { optional: true; }, null]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<PagePartDirective, "[appPagePart]", never, { "context": "appPagePartContext"; "appPagePart": "appPagePart"; }, {}, never>;
}