import { ApplicationRef, ElementRef, OnDestroy, TemplateRef } from '@angular/core';
import { TooltipComponent } from './tooltip.component';
import * as i0 from "@angular/core";
export declare class TooltipDirective implements OnDestroy {
    protected readonly el: ElementRef;
    protected readonly applicationRef: ApplicationRef;
    constructor(el: ElementRef, applicationRef: ApplicationRef);
    private _rivTooltip?;
    set rivTooltip(value: string | TemplateRef<void> | undefined);
    get rivTooltip(): string | TemplateRef<void> | undefined;
    rivTooltipTheme: 'dark' | 'light';
    rivTooltipMaxWidth: string;
    rivTooltipPreferredPosition: TooltipComponent.AnchoredPosition;
    rivTooltipCloseDelay: number;
    rivTooltipOpenDelay: number;
    /**
     * Window after the pointer leaves in which the time already spent hovering is
     * kept. Coming back within it resumes the open countdown rather than starting
     * it over, so brushing off a small target — a 16px `riv-help` icon, say — and
     * returning does not cost another full `rivTooltipOpenDelay`.
     */
    rivTooltipGracePeriod: number;
    private tooltipRef?;
    private closeTimeout?;
    private openTimeout?;
    private graceTimeout?;
    /** Hover time already served toward `rivTooltipOpenDelay`. */
    private servedDelay;
    /** When the pending open countdown started. */
    private openStartedAt;
    onMouseEnter(): void;
    onMouseLeave(): void;
    ngOnDestroy(): void;
    private initiateClose;
    private cancelClose;
    private cancelOpen;
    /**
     * Banks the hover time served so far and starts the grace period, after which
     * the countdown starts from zero again.
     */
    private holdOpenProgress;
    private discardOpenProgress;
    private closeImmediately;
    static ɵfac: i0.ɵɵFactoryDeclaration<TooltipDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<TooltipDirective, "[rivTooltip]", never, { "rivTooltip": "rivTooltip"; "rivTooltipTheme": "rivTooltipTheme"; "rivTooltipMaxWidth": "rivTooltipMaxWidth"; "rivTooltipPreferredPosition": "rivTooltipPreferredPosition"; "rivTooltipCloseDelay": "rivTooltipCloseDelay"; "rivTooltipOpenDelay": "rivTooltipOpenDelay"; "rivTooltipGracePeriod": "rivTooltipGracePeriod"; }, {}, never, never, false, never>;
}