import { MatLegacyMenuTrigger as MatMenuTrigger } from '@angular/material/legacy-menu';
import * as i0 from "@angular/core";
/**
 * NOTE: this service is generally for internal-use.
 * It is intended to be used externally only for dropdowns which require nested functionality with the custom itemComponent option.
 */
/**
 * handle sub menu.
 * on hover item we should decide if we need to close sub menu.
 */
export declare class NestedMenuStateService {
    private readonly triggerItemToHighlighted;
    readonly triggerItemToHighlighted$: import("rxjs").Observable<any>;
    /**
     * this object
     *
     * For example
     * menuTriggerLevelRef = {
     *   "1": {itemId: "111", menuTriggerRef: {...}, menuLevel: 1},
     *   "2": {itemId: "222", menuTriggerRef: {...}, menuLevel: 2},
     * }
     */
    private menuTriggerLevelRef;
    /**
     * check if the sub menu needs to be closed. if yes, close and update the menuTriggerLevelRef
     * @param itemId
     * @param menuTriggerRef will be null in case the item doesn't have a sub menu
     * @param menuLevel
     */
    handleSubMenu(itemId: string, menuTriggerRef: MatMenuTrigger | null, menuLevel: number): void;
    /**
     * reset menuTriggerLevelRef
     */
    reset(): void;
    /**
     * get active items as map ids object
     */
    private getActiveItemAsMapIds;
    /**
     * close sub menu if need.
     * @param itemId
     * @param menuLevel
     */
    private closeSubMenuIfNeed;
    /**
     * remove unused entry point from menuTriggerLevelRef.
     * For example
     * menuTriggerLevelRef = {
     *   "1": {itemId: "111", menuTriggerRef: {...}, menuLevel: 1},
     *   "2": {itemId: "222", menuTriggerRef: {...}, menuLevel: 2},
     *   "3": {itemId: "333", menuTriggerRef: {...}, menuLevel: 3},
     * }
     *
     * and we get menuLevel = 1
     * we will remove 2,3 entry point
     * Result:
     *  menuTriggerLevelRef = {
     *   "1": {itemId: "111", menuTriggerRef: {...}, menuLevel: 1}
     * }
     *
     */
    removeUnUsedEntryPoint(menuLevel: number): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<NestedMenuStateService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NestedMenuStateService>;
}
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