import type { Effect } from "../types.js";
import type { VFX } from "../vfx.js";
import { type TransitionFrame, TransitionStage } from "./effect.js";
import { type HistorySpecs } from "./history.js";
import type { AddTransitionOpts, RunOpts, ShowOpts, SlideRef, Transition, TransitionClass, TransitionEase, TransitionHandle } from "./types.js";
import { type UATransitions } from "./ua-transition.js";
export type ResolvedSpec = {
    transition: Transition | TransitionClass;
    /** Constructor params. Only used with a class. */
    params: unknown;
    reverse: boolean;
    duration: number;
    /** The spec's own; the transition's fills in later. */
    overflow: true | number | undefined;
    ease: TransitionEase | undefined;
};
/**
 * Put `top` over `base`, field by field.
 * A `top` that sets `transition` drops the base params, so they never reach another class.
 */
export declare function layerSpec(base: RunOpts, top: RunOpts): RunOpts;
/** Put the run options over the container defaults, then fill in the rest. */
export declare function resolveSpec(opts: AddTransitionOpts, run?: RunOpts): ResolvedSpec;
/** Shallow equal; arrays compare by item. Missing params equal empty ones. */
export declare function sameParams(a: unknown, b: unknown): boolean;
/** Wait for pending images, videos and `fonts`, or until the timeout. */
export declare function waitForMedia(root: ParentNode, fonts: Promise<unknown> | undefined, timeoutMs?: number): Promise<void>;
export type TransitionHost = Pick<VFX, "addHTMLWithStill" | "update" | "updateInTime" | "updateEffects" | "remove" | "freezeInside" | "lockSize" | "forceRender" | "reducedMotion">;
export type TransitionStageLike = Effect & Pick<TransitionStage, "snapshot" | "start" | "cancel" | "cut"> & {
    readonly frame: TransitionFrame | null;
};
export declare class TransitionController implements TransitionHandle {
    #private;
    constructor(vfx: TransitionHost, element: HTMLElement, opts?: AddTransitionOpts, onDestroy?: () => void, stage?: TransitionStageLike, history?: HistorySpecs, uaTransitions?: UATransitions);
    get running(): boolean;
    show(slide: SlideRef, opts?: ShowOpts): Promise<void>;
    run(cb: () => void | Promise<void>, opts?: RunOpts | (() => RunOpts)): Promise<void>;
    cancel(): void;
    destroy(): void;
}