import { type ReactNode } from "react";
import type { OverlayHost } from "./portal.js";
/**
 * Inside a card that paints in its window's layer, the provider that card is placed
 * in (its frame). The card's subtree renders in the layer's outlet, so the nearest
 * provider there is the layer; a card opened from inside it reads its frame here
 * instead, and is placed, clamped and capped by the same frame. Null elsewhere.
 */
export declare const OverlayFrameContext: import("react").Context<OverlayHost | null>;
/** Record `host`'s place in a window: inside `parent`'s layer, or a layer of its own. */
export declare function registerOverlayLayer(host: OverlayHost, parent: OverlayHost | null): void;
/** The outermost host in `host`'s native window (the host itself at a window's root). */
export declare function overlayLayerOf(host: OverlayHost): OverlayHost;
/**
 * Publish `children` into `host`'s outlet for as long as the caller is mounted. The
 * public Portal passes its nearest host; AnchoredOverlay passes the layer it paints in.
 * A null host publishes nothing.
 */
export declare function usePortalMount(host: OverlayHost | null, children: ReactNode): void;
/** Publish `children` into a given host's outlet; renders nothing in place. */
export declare function PortalInto({ host, children }: {
    host: OverlayHost;
    children: ReactNode;
}): null;
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