/**
 * Copyright Aquera Inc 2023
 *
 * This source code is licensed under the BSD-3-Clause license found in the
 * LICENSE file in the root directory of this source tree.
 */
import type { ReactiveController, ReactiveControllerHost } from 'lit';
import type { NileAppShell } from './nile-app-shell';
/** A reactive controller that links a region component to its shell, re-rendering the host when the shell's nav or panel state changes. */
export declare class AppShellController implements ReactiveController {
    host: ReactiveControllerHost & HTMLElement;
    /** Id of the shell to link to. Defaults to the nearest ancestor. */
    shellId?: string;
    private linked?;
    private observer?;
    constructor(host: ReactiveControllerHost & HTMLElement);
    /** The linked shell, resolving it first if it has not been found yet. */
    get shell(): NileAppShell | null;
    hostConnected(): void;
    hostDisconnected(): void;
    /** Resolve the shell and subscribe to it. Returns true when newly linked. */
    private link;
    private unlink;
    private find;
    private handleShellChange;
}
export default AppShellController;