/**
 * @license
 * Copyright Akveo. All Rights Reserved.
 * Licensed under the MIT License. See License.txt in the project root for license information.
 */
import { ComponentFactoryResolver, ElementRef, OnDestroy, OnInit } from '@angular/core';
import { NbPopoverDirective } from '../popover/popover.directive';
import { NbMenuItem, NbMenuService } from '../menu/menu.service';
import { NbThemeService } from '../../services/theme.service';
import { NbPopoverAdjustment, NbPopoverPlacement } from '../popover/helpers/model';
import { NbPositioningHelper } from '../popover/helpers/positioning.helper';
import { NbAdjustmentHelper } from '../popover/helpers/adjustment.helper';
import { NbTriggerHelper } from '../popover/helpers/trigger.helper';
import { NbPlacementHelper } from '../popover/helpers/placement.helper';
/**
 * Full featured context menu directive.
 *
 * @stacked-example(Showcase, context-menu/context-menu-showcase.component)
 *
 * Just pass menu items array:
 *
 * ```html
 * <button [nbContextMenu]="items"></button>
 * ...
 * items = [{ title: 'Profile' }, { title: 'Log out' }];
 * ```
 *
 * If you want to handle context menu clicks you have to pass `nbContextMenuTag`
 * param and subscribe to events using NbMenuService.
 * `NbContextMenu` renders plain `NbMenu` inside, so
 * you have to work with it just like with `NbMenu` component:
 *
 * @stacked-example(Menu item click, context-menu/context-menu-click.component)
 *
 * Context menu has different placements, such as: top, bottom, left and right
 * which can be used as following:
 *
 * ```html
 * <button [nbContextMenu]="items" nbContextMenuPlacement="right"></button>
 * ```
 *
 * ```ts
 * items = [{ title: 'Profile' }, { title: 'Log out' }];
 * ```
 *
 * By default context menu will try to adjust itself to maximally fit viewport
 * and provide the best user experience. It will try to change placement of the context menu.
 * If you wanna disable this behaviour just set it falsy value.
 *
 * ```html
 * <button [nbContextMenu]="items" nbContextMenuAdjustment="counterclockwise"></button>
 * ```
 *
 * ```ts
 * items = [{ title: 'Profile' }, { title: 'Log out' }];
 * ```
 * */
export declare class NbContextMenuDirective implements OnInit, OnDestroy {
    private menuService;
    /**
     * Basic menu items, will be passed to the internal NbMenuComponent.
     * */
    items: NbMenuItem[];
    /**
     * Position will be calculated relatively host element based on the placement.
     * Can be top, right, bottom and left.
     * */
    placement: NbPopoverPlacement;
    /**
     * Container placement will be changes automatically based on this strategy if container can't fit view port.
     * Set this property to any falsy value if you want to disable automatically adjustment.
     * Available values: clockwise, counterclockwise.
     * */
    adjustment: NbPopoverAdjustment;
    /**
     * Set NbMenu tag, which helps identify menu when working with NbMenuService.
     * */
    tag: string;
    protected popover: NbPopoverDirective;
    protected context: {};
    private menuTag;
    private alive;
    constructor(hostRef: ElementRef, themeService: NbThemeService, componentFactoryResolver: ComponentFactoryResolver, positioningHelper: NbPositioningHelper, adjustmentHelper: NbAdjustmentHelper, triggerHelper: NbTriggerHelper, platformId: any, placementHelper: NbPlacementHelper, menuService: NbMenuService);
    ngOnInit(): void;
    ngOnDestroy(): void;
    /**
     * Show context menu.
     * */
    show(): void;
    /**
     * Hide context menu.
     * */
    hide(): void;
    /**
     * Toggle context menu state.
     * */
    toggle(): void;
    onResize(): void;
    private validateItems(items);
    private subscribeOnItemClick();
}