/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { ElementRef, InjectionToken, OnDestroy, OnInit, QueryList } from '@angular/core';
/**
 * Item inside a tab header relative to which the ink bar can be aligned.
 * @docs-private
 */
export interface MatInkBarItem extends OnInit, OnDestroy {
    elementRef: ElementRef<HTMLElement>;
    activateInkBar(previousIndicatorClientRect?: ClientRect): void;
    deactivateInkBar(): void;
    fitInkBarToContent: boolean;
}
/**
 * Abstraction around the MDC tab indicator that acts as the tab header's ink bar.
 * @docs-private
 */
export declare class OuiInkBar {
    private _items;
    /** Item to which the ink bar is aligned currently. */
    private _currentItem;
    constructor(_items: QueryList<MatInkBarItem>);
    /** Hides the ink bar. */
    hide(): void;
    /** Aligns the ink bar to a DOM node. */
    alignToElement(element: HTMLElement): void;
}
/**
 * Mixin that can be used to apply the `MatInkBarItem` behavior to a class.
 * Base on MDC's `MDCSlidingTabIndicatorFoundation`:
 * https://github.com/material-components/material-components-web/blob/c0a11ef0d000a098fd0c372be8f12d6a99302855/packages/mdc-tab-indicator/sliding-foundation.ts
 * @docs-private
 */
export declare function mixinInkBarItem<T extends new (...args: any[]) => {
    elementRef: ElementRef<HTMLElement>;
}>(base: T): T & (new (...args: any[]) => MatInkBarItem);
/**
 * Interface for a OuiInkBar positioner method, defining the positioning and width of the ink
 * bar in a set of tabs.
 */
export interface _OuiInkBarPositioner {
    (element: HTMLElement): {
        left: string;
        width: string;
    };
}
/**
 * The default positioner function for the OuiInkBar.
 * @docs-private
 */
export declare function _OUI_INK_BAR_POSITIONER_FACTORY(): _OuiInkBarPositioner;
/** Injection token for the OuiInkBar's Positioner. */
export declare const _OUI_INK_BAR_POSITIONER: InjectionToken<_OuiInkBarPositioner>;
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