/********************************************************************************
 * Copyright (c) 2026 Contributors to the Eclipse Foundation
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * https://www.eclipse.org/legal/epl-2.0
 *
 * SPDX-License-Identifier: EPL-2.0
 ********************************************************************************/
import { FunctionComponent, ReactNode, RefObject } from 'react';
/**
 * Tracks whether a page-level search bar (e.g. the home hero) is active — the
 * nav bar derives its own field's visibility from it.
 */
export interface PageSearchBarValue {
    hasPageSearchBar: boolean;
    isPageSearchBarActive: () => boolean;
    registerPageSearchBar: () => () => void;
}
export declare function usePageSearchBar(): PageSearchBarValue;
/**
 * Marks the calling component as the page's search bar, so the nav bar hides its
 * own field and hands focus requests over. Registered while mounted, or — when
 * `visibilityRef` is given — only while that element is in the viewport. Returns
 * whether the bar is currently registered; callers gate focus handling and their
 * view-transition name on it.
 */
export declare function useRegisterPageSearchBar(visibilityRef?: RefObject<Element>): boolean;
export declare const PageSearchBarProvider: FunctionComponent<{
    children: ReactNode;
}>;
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