import * as i0 from '@angular/core';
import { Provider } from '@angular/core';

/**
 * Headless breadcrumb trail implementing the
 * [WAI-ARIA Breadcrumb pattern](https://www.w3.org/WAI/ARIA/apg/patterns/breadcrumb/):
 * a `navigation` landmark wrapping a set of links that reveal the page's
 * position within the site hierarchy.
 *
 * The directive contributes only the landmark role + accessible name; the
 * consumer owns the markup structure (an `<ol>` of `<li>` links is the APG
 * recommendation) and applies their own styles. Each link decorated with
 * `[forBreadcrumbItem]` can mark itself the current page via `current`, and
 * visual dividers decorated with `[forBreadcrumbSeparator]` are hidden from
 * assistive technology.
 *
 * There is no keyboard interaction or focus management beyond what the native
 * links provide — breadcrumb links are ordinary tab stops.
 *
 * @example
 * ```html
 * <nav forBreadcrumbs>
 *   <ol>
 *     <li><a forBreadcrumbItem href="/">Home</a></li>
 *     <li forBreadcrumbSeparator aria-hidden="true">/</li>
 *     <li><a forBreadcrumbItem href="/library">Library</a></li>
 *     <li forBreadcrumbSeparator aria-hidden="true">/</li>
 *     <li><a forBreadcrumbItem href="/library/data" current>Data</a></li>
 *   </ol>
 * </nav>
 * ```
 */
declare class ForBreadcrumbs {
    #private;
    /**
     * Accessible label for the navigation landmark. Defaults to the scope's
     * `label` (`'Breadcrumb'` unless overridden via
     * `provideForBreadcrumbsDefaults`), so a bare `<nav forBreadcrumbs>` is
     * already a correctly labelled landmark — the conventional name for this
     * pattern. Override it per-instance via `[ariaLabel]` (or point a native
     * `aria-labelledby` at a visible heading) when the page hosts more than one
     * breadcrumb trail and they need to be told apart; set it to `null` to drop
     * the attribute and rely on `aria-labelledby`.
     */
    readonly ariaLabel: i0.InputSignal<string | null>;
    protected readonly resolvedAriaLabel: i0.Signal<string | null>;
    static ɵfac: i0.ɵɵFactoryDeclaration<ForBreadcrumbs, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<ForBreadcrumbs, "[forBreadcrumbs]", ["forBreadcrumbs"], { "ariaLabel": { "alias": "ariaLabel"; "required": false; "isSignal": true; }; }, {}, never, never, true, never>;
}

/**
 * A single link within a breadcrumb trail. Apply on an `<a>` so navigation is
 * native. Set `current` on the link that points to the page the user is on —
 * it reflects [`aria-current="page"`](https://www.w3.org/TR/wai-aria-1.2/#aria-current)
 * so assistive technology announces it as the current location.
 */
declare class ForBreadcrumbItem {
    /**
     * Whether this item represents the page the user is currently on. The
     * current item reflects `aria-current="page"`; all others emit no
     * `aria-current` attribute.
     */
    readonly current: i0.InputSignalWithTransform<boolean, unknown>;
    static ɵfac: i0.ɵɵFactoryDeclaration<ForBreadcrumbItem, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<ForBreadcrumbItem, "[forBreadcrumbItem]", ["forBreadcrumbItem"], { "current": { "alias": "current"; "required": false; "isSignal": true; }; }, {}, never, never, true, never>;
}

/**
 * Decorative divider rendered between breadcrumb items (a `/`, `>`, chevron,
 * etc.). Reflects `aria-hidden="true"` so assistive technology skips it — the
 * trail's structure is already conveyed by the list and the links, making the
 * visual separator redundant in the accessibility tree.
 */
declare class ForBreadcrumbSeparator {
    static ɵfac: i0.ɵɵFactoryDeclaration<ForBreadcrumbSeparator, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<ForBreadcrumbSeparator, "[forBreadcrumbSeparator]", ["forBreadcrumbSeparator"], {}, {}, never, never, true, never>;
}

/**
 * Defaults inherited by descendant breadcrumb trails in the surrounding
 * injector scope. Configure with `provideForBreadcrumbsDefaults` either at the
 * application root or in any component's `providers` array; partial overrides
 * merge with the parent scope.
 */
interface ForBreadcrumbsDefaults {
    /**
     * Accessible name for the breadcrumb `navigation` landmark, for trails that
     * don't set `[ariaLabel]` locally. Localize it here to translate every
     * breadcrumb landmark in the scope.
     */
    label: string;
}
/** Token holding the resolved breadcrumbs defaults for the current scope. */
declare const FOR_BREADCRUMBS_DEFAULTS: i0.InjectionToken<ForBreadcrumbsDefaults>;
/**
 * Configures forty-cdk breadcrumbs defaults for this injector scope. Partial
 * overrides inherit unspecified keys from the parent scope (or library
 * defaults at the root).
 */
declare function provideForBreadcrumbsDefaults(defaults?: Partial<ForBreadcrumbsDefaults>): Provider[];

export { FOR_BREADCRUMBS_DEFAULTS, ForBreadcrumbItem, ForBreadcrumbSeparator, ForBreadcrumbs, provideForBreadcrumbsDefaults };
export type { ForBreadcrumbsDefaults };