import { InjectionToken } from '@angular/core';
export type SortDirection = 'asc' | 'desc' | undefined;
/** Position of the arrow that displays when sorted. */
export type SortHeaderArrowPosition = 'before' | 'after';
/** Interface for a directive that holds sorting state consumed by `ItSortHeader`. */
export interface ItSortable {
    /** The id of the column being sorted. */
    id: string;
    /** Starting sort direction. */
    start?: SortDirection;
    /** Whether to disable clearing the sorting state. */
    disableSortClear?: boolean;
}
/** The current sort state. */
export interface ItSortEvent {
    /** The id of the column being sorted. */
    active: string;
    /** The sort direction. */
    direction: SortDirection;
}
/**
 * Default options for `it-sort`.
 */
export interface ItSortDefaultOptions {
    /** Whether to disable clearing the sorting state. */
    disableClear?: boolean;
    /** Position of the arrow that displays when sorted. */
    arrowPosition?: SortHeaderArrowPosition;
}
/**
 * Injection token to be used to override the default options for `it-sort`.
 */
export declare const IT_SORT_DEFAULT_OPTIONS: InjectionToken<ItSortDefaultOptions>;