/**
 * @license
 * Copyright Akveo. All Rights Reserved.
 * Licensed under the MIT License. See License.txt in the project root for license information.
 */
import { AfterViewInit, ComponentFactoryResolver, ComponentRef, ElementRef, OnDestroy } from '@angular/core';
import { NbAdjustableConnectedPositionStrategy, NbAdjustment, NbOverlayContent, NbOverlayRef, NbOverlayService, NbPosition, NbPositionBuilderService, NbTrigger, NbTriggerStrategy } from '../cdk';
/**
 * Powerful popover directive, which provides the best UX for your users.
 *
 * @stacked-example(Showcase, popover/popover-showcase.component)
 *
 * Popover can accept different content such as:
 * TemplateRef
 *
 * ```html
 * <button [nbPopover]="templateRef"></button>
 * <ng-template #templateRef>
 *   <span>Hello, Popover!</span>
 * </ng-template>
 * ```
 * ### Installation
 *
 * Import `NbPopoverModule` to your feature module.
 * ```ts
 * @NgModule({
 *   imports: [
 *   	// ...
 *     NbPopoverModule,
 *   ],
 * })
 * export class PageModule { }
 * ```
 * ### Usage
 *
 * Custom components
 *
 * ```html
 * <button [nbPopover]="MyPopoverComponent"></button>
 * ```
 *
 * Both custom components and templateRef popovers can receive *contentContext* property
 * that will be passed to the content props.
 *
 * Primitive types
 *
 * ```html
 * <button nbPopover="Hello, Popover!"></button>
 * ```
 *
 * Popover has different placements, such as: top, bottom, left, right, start and end
 * which can be used as following:
 *
 * @stacked-example(Placements, popover/popover-placements.component)
 *
 * By default popover will try to adjust itself to maximally fit viewport
 * and provide the best user experience. It will try to change position of the popover container.
 * If you wanna disable this behaviour just set it falsy value.
 *
 * ```html
 * <button nbPopover="Hello, Popover!" [nbPopoverAdjust]="false"></button>
 * ```
 *
 * Also popover has some different modes which provides capability show$ and hide$ popover in different ways:
 *
 * - Click mode popover shows when a user clicking on the host element and hides when the user clicks
 * somewhere on the document except popover.
 * - Hint mode provides capability show$ popover when the user hovers on the host element
 * and hide$ popover when user hovers out of the host.
 * - Hover mode works like hint mode with one exception - when the user moves mouse from host element to
 * the container element popover will not be hidden.
 *
 * @stacked-example(Available Modes, popover/popover-modes.component.html)
 *
 * @additional-example(Template Ref, popover/popover-template-ref.component)
 * @additional-example(Custom Component, popover/popover-custom-component.component)
 * */
export declare class NbPopoverDirective implements AfterViewInit, OnDestroy {
    protected document: any;
    private hostRef;
    private positionBuilder;
    private overlay;
    private componentFactoryResolver;
    /**
     * Popover content which will be rendered in NbArrowedOverlayContainerComponent.
     * Available content: template ref, component and any primitive.
     * */
    content: NbOverlayContent;
    /**
     * Container content context. Will be applied to the rendered component.
     * */
    context: Object;
    /**
     * Position will be calculated relatively host element based on the position.
     * Can be top, right, bottom, left, start or end.
     * */
    position: NbPosition;
    /**
     * Container position 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: NbAdjustment;
    /**
     * Describes when the container will be shown.
     * Available options: click, hover and hint
     * */
    mode: NbTrigger;
    protected ref: NbOverlayRef;
    protected container: ComponentRef<any>;
    protected positionStrategy: NbAdjustableConnectedPositionStrategy;
    protected triggerStrategy: NbTriggerStrategy;
    protected alive: boolean;
    constructor(document: any, hostRef: ElementRef, positionBuilder: NbPositionBuilderService, overlay: NbOverlayService, componentFactoryResolver: ComponentFactoryResolver);
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    show(): void;
    hide(): void;
    toggle(): void;
    protected createPositionStrategy(): NbAdjustableConnectedPositionStrategy;
    protected createTriggerStrategy(): NbTriggerStrategy;
    protected subscribeOnPositionChange(): void;
    protected subscribeOnTriggers(): void;
}