import { Subject } from 'rxjs';
import { ElementRef, OnChanges, OnDestroy, Renderer2 } from '@angular/core';
import * as i0 from "@angular/core";
export declare abstract class UiFormatDirective implements OnChanges, OnDestroy {
    protected _renderer: Renderer2;
    protected _elementRef: ElementRef;
    protected abstract _text?: HTMLElement;
    protected _redraw$: Subject<void>;
    protected _destroyed$: Subject<void>;
    constructor(_renderer: Renderer2, _elementRef: ElementRef);
    ngOnChanges(): void;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<UiFormatDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<UiFormatDirective, never, never, {}, {}, never, never, false, never>;
}