import { Overlay } from '@angular/cdk/overlay';
import { AfterContentInit, EventEmitter, NgZone, OnDestroy, TemplateRef, ViewContainerRef } from '@angular/core';
export interface MentionOnSearchTypes {
    value: string;
    prefix: string;
}
export declare class NzMentionComponent implements OnDestroy, AfterContentInit {
    private document;
    private ngZone;
    private overlay;
    private viewContainerRef;
    nzOnSelect: EventEmitter<string | {}>;
    nzOnSearchChange: EventEmitter<MentionOnSearchTypes>;
    nzValueWith: (value: any) => string;
    nzPrefix: string | string[];
    nzLoading: boolean;
    nzNotFoundContent: string;
    nzSuggestions: string[];
    nzPlacement: MentionPlacement;
    trigger: any;
    suggestionsTemp: any;
    suggestionChild: TemplateRef<{
        $implicit: any;
    }>;
    isOpen: boolean;
    filteredSuggestions: string[];
    suggestionTemplate: TemplateRef<{
        $implicit: any;
    }> | null;
    private _suggestions;
    private _placement;
    private previousValue;
    private cursorMention;
    private cursorMentionStart;
    private cursorMentionEnd;
    private activeIndex;
    private overlayRef;
    private portal;
    private positionStrategy;
    private overlayBackdropClickSubscription;
    private readonly triggerNativeElement;
    constructor(document: any, ngZone: NgZone, overlay: Overlay, viewContainerRef: ViewContainerRef);
    ngAfterContentInit(): void;
    ngOnDestroy(): void;
    closeDropdown(): void;
    openDropdown(): void;
    getMentions(): string[];
    selectSuggestion(suggestion: string | {}): void;
    private handleInput(event);
    private handleKeydown(event);
    private handleClick();
    private bindTriggerEvents();
    private suggestionsFilter(value, emit);
    private resetDropdown(emit?);
    private setNextItemActive();
    private setPreviousItemActive();
    private canOpen();
    private resetCursorMention();
    private updatePositions();
    private subscribeOverlayBackdropClick();
    private attachOverlay();
    private getOverlayConfig();
    private getOverlayPosition();
}
export interface Mention {
    startPos: number;
    endPos: number;
    mention: string;
}
export declare type MentionPlacement = 'top' | 'bottom';