import { OverlayRef } from '@angular/cdk/overlay';
import { ChangeDetectorRef, ElementRef, EventEmitter, InjectionToken, Injector, TemplateRef, ViewContainerRef } from '@angular/core';
import { Subject } from 'rxjs';
import { Placement } from '../../common/placement';
import { BooleanInput } from '@angular/cdk/coercion';
import { SapphireOverlay } from '../../theme/src/sapphire-overlay.service';
import * as i0 from "@angular/core";
export interface PopoverTrigger {
    toggle(): void;
    open(): void;
    close(): void;
    elementRef: ElementRef<HTMLElement>;
}
export declare const POPOVER_TRIGGER: InjectionToken<PopoverTrigger>;
export declare class PopoverTriggerDirective implements PopoverTrigger {
    private changeDetectorRef;
    private overlay;
    private viewContainerRef;
    elementRef: ElementRef<HTMLElement>;
    private injector;
    placement: Placement;
    templateRef: TemplateRef<unknown> | null;
    /**
     * Whether the popover should not block interaction with background.
     */
    nonModal: BooleanInput;
    /**
     * Whether the popover should be opened on press start.
     */
    openOnPressStart: BooleanInput;
    /**
     * Whether the popover should be closed when the container is scrolled.
     * @default false
     */
    closeOnScroll: BooleanInput;
    /**
     * Can be used to disable toggling popover on clicks. Useful if `spPopoverTrigger`
     * is applied on an element which doesn't support `disabled` property.
     */
    disabled: BooleanInput;
    /**
     * If the popover should be pushed around whenever it doesn't fit the viewport
     * with the provided placement.
     */
    disablePushInsideViewport: BooleanInput;
    /** Emits when the attached popover is requested to open */
    readonly opened: EventEmitter<void>;
    /** Emits when the attached popover is requested to close */
    readonly closed: EventEmitter<void>;
    /** Emits when this trigger is destroyed. */
    protected readonly destroyed: Subject<void>;
    /** A reference to the overlay which manages the triggered menu */
    protected overlayRef: OverlayRef | null;
    private isBeingPressed;
    get getPopoverId(): string | undefined;
    constructor(changeDetectorRef: ChangeDetectorRef, overlay: SapphireOverlay, viewContainerRef: ViewContainerRef, elementRef: ElementRef<HTMLElement>, injector: Injector);
    ngOnDestroy(): void;
    /** Toggle the attached popover. */
    toggle(): void;
    /** Open the attached popover. */
    open(): void;
    /** Close the opened popover. */
    close(): void;
    /** Whether the popover is open. */
    isOpen(): boolean;
    private handleMousedown;
    private handleClick;
    /**
     * While onFocusout takes care of closing the popover when focus goes out, in the rare cases
     * that there is no more focusable element between the trigger and the popover, the focus can
     * go to the popover on pressing `Tab`. But the popover should be closed when tabbing on the
     * trigger.
     */
    private handleTab;
    /**
     * In some use cases (e.g. in searchable select) popover trigger grabs the focus, right after
     * the popover is opened. That requires popover trigger to detect when focus goes out of it
     * and close the popover.
     * Note: we can't use `blur` event since it won't bubble up, and the focus can be on an element
     * inside the trigger, but not the trigger itself.
     *
     */
    private onFocusout;
    private handleKeyDown;
    private destroyOverlay;
    /** Get the configuration object used to create the overlay. */
    private getOverlayConfig;
    private getContentPortal;
    private getOverlayPositionStrategy;
    static ɵfac: i0.ɵɵFactoryDeclaration<PopoverTriggerDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<PopoverTriggerDirective, "[spPopoverTriggerFor]", ["spPopoverTrigger"], { "placement": "spPopoverPlacement"; "templateRef": "spPopoverTriggerFor"; "nonModal": "spPopoverNonModal"; "openOnPressStart": "spPopoverTriggerOpenOnPressStart"; "closeOnScroll": "spPopoverTriggerCloseOnScroll"; "disabled": "spPopoverTriggerDisabled"; "disablePushInsideViewport": "spPopoverDisablePushInsideViewport"; }, { "opened": "spPopoverTriggerOpened"; "closed": "spPopoverTriggerClosed"; }, never, never, false, never>;
}