/**
 * @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 { AriaDescriber } from '@angular/cdk/a11y';
import { ElementRef, NgZone, OnDestroy } from '@angular/core';
import { ThemePalette } from '@angular/material/core';
export declare type MatBadgePosition = 'above after' | 'above before' | 'below before' | 'below after';
export declare type MatBadgeSize = 'small' | 'medium' | 'large';
/** Directive to display a text badge. */
export declare class MatBadge implements OnDestroy {
    private _document;
    private _ngZone;
    private _elementRef;
    private _ariaDescriber;
    /** The color of the badge. Can be `primary`, `accent`, or `warn`. */
    color: ThemePalette;
    private _color;
    /** Whether the badge should overlap its contents or not */
    overlap: boolean;
    private _overlap;
    /**
     * Position the badge should reside.
     * Accepts any combination of 'above'|'below' and 'before'|'after'
     */
    position: MatBadgePosition;
    /** The content for the badge */
    content: string;
    private _content;
    /** Message used to describe the decorated element via aria-describedby */
    description: string;
    private _description;
    /** Size of the badge. Can be 'small', 'medium', or 'large'. */
    size: MatBadgeSize;
    /** Whether the badge is hidden. */
    hidden: boolean;
    private _hidden;
    /** Unique id for the badge */
    _id: number;
    private _badgeElement;
    constructor(_document: any, _ngZone: NgZone, _elementRef: ElementRef, _ariaDescriber: AriaDescriber);
    /** Whether the badge is above the host or not */
    isAbove(): boolean;
    /** Whether the badge is after the host or not */
    isAfter(): boolean;
    ngOnDestroy(): void;
    /** Injects a span element into the DOM with the content. */
    private _updateTextContent();
    /** Creates the badge element */
    private _createBadgeElement();
    /** Sets the aria-label property on the element */
    private _updateHostAriaDescription(newDescription, oldDescription);
    /** Adds css theme class given the color to the component host */
    private _setColor(colorPalette);
}