import { ViewContainerRef, OnInit, DoCheck } from '@angular/core';
import { MatFormFieldControl, ErrorStateMatcher, CanUpdateErrorState } from '@angular/material';
import { Subject } from 'rxjs';
import { NgControl, NgForm, FormGroupDirective } from '@angular/forms';
import { _MatInputMixinBase } from './mat-contenteditable.directive';
export declare class MatCkeditorDirective extends _MatInputMixinBase implements MatFormFieldControl<string>, DoCheck, CanUpdateErrorState, OnInit {
    protected readonly viewRef: ViewContainerRef;
    ngControl: NgControl;
    /**
     * Implemented as part of MatFormFieldControl.
     * See https://material.angular.io/guide/creating-a-custom-form-field-control
     */
    static nextId: number;
    value: string;
    readonly stateChanges: Subject<void>;
    id: string;
    placeholder: string;
    contentEmpty: string[];
    readonly empty: boolean;
    readonly shouldLabelFloat: boolean;
    focused: boolean;
    required: boolean;
    disabled: boolean;
    errorState: boolean;
    errorStateMatcher: ErrorStateMatcher;
    controlType: string;
    describedBy: string;
    protected editor: any;
    constructor(viewRef: ViewContainerRef, ngControl: NgControl, _parentForm: NgForm, _parentFormGroup: FormGroupDirective, _defaultErrorStateMatcher: ErrorStateMatcher);
    ngOnInit(): void;
    ngDoCheck(): void;
    setDescribedByIds(ids: string[]): void;
    onContainerClick(): void;
}