import { Optional } from '@angular/core';
import { Subject } from 'rxjs';
import { TsSortDirection } from './sort.directive';
/**
 * To modify the labels and text displayed, create a new instance of TsSortHeaderIntl and
 * include it in a custom provider.
 */
export declare class TsSortHeaderIntl {
    /**
     * Stream that emits whenever the labels here are changed. Use this to notify
     * components if the labels have changed after initialization.
     */
    changes: Subject<void>;
    /**
     * ARIA label for the sorting button
     *
     * @param id
     */
    sortButtonLabel: (id: string) => string;
    /**
     * A label to describe the current sort (visible only to screenreaders)
     *
     * @param id
     * @param direction
     */
    sortDescriptionLabel: (id: string, direction: TsSortDirection) => string;
}
/**
 * Factory to return an instance of TsSortHeaderIntl
 *
 * @param parentIntl
 */
export declare const TS_SORT_HEADER_INTL_PROVIDER_FACTORY: (parentIntl: TsSortHeaderIntl) => TsSortHeaderIntl;
/**
 * TsSortHeaderIntl provider declaration
 */
export declare const TS_SORT_HEADER_INTL_PROVIDER: {
    provide: typeof TsSortHeaderIntl;
    deps: Optional[][];
    useFactory: (parentIntl: TsSortHeaderIntl) => TsSortHeaderIntl;
};