/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { Observable } from 'rxjs';
import { AbstractControl } from '../model/abstract_model';
import { AsyncValidator, AsyncValidatorFn, ValidationErrors, Validator, ValidatorFn } from './validators';
/**
 * @description
 * Base class for control directives.
 *
 * This class is only used internally in the `ReactiveFormsModule` and the `FormsModule`.
 *
 * @publicApi
 */
export declare abstract class AbstractControlDirective {
    /**
     * @description
     * A reference to the underlying control.
     *
     * @returns the control that backs this directive. Most properties fall through to that instance.
     */
    abstract get control(): AbstractControl | null;
    /**
     * @description
     * Reports the value of the control if it is present, otherwise null.
     */
    get value(): any;
    /**
     * @description
     * Reports whether the control is valid. A control is considered valid if no
     * validation errors exist with the current value.
     * If the control is not present, null is returned.
     */
    get valid(): boolean | null;
    /**
     * @description
     * Reports whether the control is invalid, meaning that an error exists in the input value.
     * If the control is not present, null is returned.
     */
    get invalid(): boolean | null;
    /**
     * @description
     * Reports whether a control is pending, meaning that that async validation is occurring and
     * errors are not yet available for the input value. If the control is not present, null is
     * returned.
     */
    get pending(): boolean | null;
    /**
     * @description
     * Reports whether the control is disabled, meaning that the control is disabled
     * in the UI and is exempt from validation checks and excluded from aggregate
     * values of ancestor controls. If the control is not present, null is returned.
     */
    get disabled(): boolean | null;
    /**
     * @description
     * Reports whether the control is enabled, meaning that the control is included in ancestor
     * calculations of validity or value. If the control is not present, null is returned.
     */
    get enabled(): boolean | null;
    /**
     * @description
     * Reports the control's validation errors. If the control is not present, null is returned.
     */
    get errors(): ValidationErrors | null;
    /**
     * @description
     * Reports whether the control is pristine, meaning that the user has not yet changed
     * the value in the UI. If the control is not present, null is returned.
     */
    get pristine(): boolean | null;
    /**
     * @description
     * Reports whether the control is dirty, meaning that the user has changed
     * the value in the UI. If the control is not present, null is returned.
     */
    get dirty(): boolean | null;
    /**
     * @description
     * Reports whether the control is touched, meaning that the user has triggered
     * a `blur` event on it. If the control is not present, null is returned.
     */
    get touched(): boolean | null;
    /**
     * @description
     * Reports the validation status of the control. Possible values include:
     * 'VALID', 'INVALID', 'DISABLED', and 'PENDING'.
     * If the control is not present, null is returned.
     */
    get status(): string | null;
    /**
     * @description
     * Reports whether the control is untouched, meaning that the user has not yet triggered
     * a `blur` event on it. If the control is not present, null is returned.
     */
    get untouched(): boolean | null;
    /**
     * @description
     * Returns a multicasting observable that emits a validation status whenever it is
     * calculated for the control. If the control is not present, null is returned.
     */
    get statusChanges(): Observable<any> | null;
    /**
     * @description
     * Returns a multicasting observable of value changes for the control that emits every time the
     * value of the control changes in the UI or programmatically.
     * If the control is not present, null is returned.
     */
    get valueChanges(): Observable<any> | null;
    /**
     * @description
     * Returns an array that represents the path from the top-level form to this control.
     * Each index is the string name of the control on that level.
     */
    get path(): string[] | null;
    /**
     * Contains the result of merging synchronous validators into a single validator function
     * (combined using `Validators.compose`).
     */
    private _composedValidatorFn;
    /**
     * Contains the result of merging asynchronous validators into a single validator function
     * (combined using `Validators.composeAsync`).
     */
    private _composedAsyncValidatorFn;
    /**
     * Set of synchronous validators as they were provided while calling `setValidators` function.
     * @internal
     */
    _rawValidators: Array<Validator | ValidatorFn>;
    /**
     * Set of asynchronous validators as they were provided while calling `setAsyncValidators`
     * function.
     * @internal
     */
    _rawAsyncValidators: Array<AsyncValidator | AsyncValidatorFn>;
    /**
     * Sets synchronous validators for this directive.
     * @internal
     */
    _setValidators(validators: Array<Validator | ValidatorFn> | undefined): void;
    /**
     * Sets asynchronous validators for this directive.
     * @internal
     */
    _setAsyncValidators(validators: Array<AsyncValidator | AsyncValidatorFn> | undefined): void;
    /**
     * @description
     * Synchronous validator function composed of all the synchronous validators registered with this
     * directive.
     */
    get validator(): ValidatorFn | null;
    /**
     * @description
     * Asynchronous validator function composed of all the asynchronous validators registered with
     * this directive.
     */
    get asyncValidator(): AsyncValidatorFn | null;
    private _onDestroyCallbacks;
    /**
     * Internal function to register callbacks that should be invoked
     * when directive instance is being destroyed.
     * @internal
     */
    _registerOnDestroy(fn: () => void): void;
    /**
     * Internal function to invoke all registered "on destroy" callbacks.
     * Note: calling this function also clears the list of callbacks.
     * @internal
     */
    _invokeOnDestroyCallbacks(): void;
    /**
     * @description
     * Resets the control with the provided value if the control is present.
     */
    reset(value?: any): void;
    /**
     * @description
     * Reports whether the control with the given path has the error specified.
     *
     * @param errorCode The code of the error to check
     * @param path A list of control names that designates how to move from the current control
     * to the control that should be queried for errors.
     *
     * @usageNotes
     * For example, for the following `FormGroup`:
     *
     * ```
     * form = new FormGroup({
     *   address: new FormGroup({ street: new FormControl() })
     * });
     * ```
     *
     * The path to the 'street' control from the root form would be 'address' -> 'street'.
     *
     * It can be provided to this method in one of two formats:
     *
     * 1. An array of string control names, e.g. `['address', 'street']`
     * 1. A period-delimited list of control names in one string, e.g. `'address.street'`
     *
     * If no path is given, this method checks for the error on the current control.
     *
     * @returns whether the given error is present in the control at the given path.
     *
     * If the control is not present, false is returned.
     */
    hasError(errorCode: string, path?: Array<string | number> | string): boolean;
    /**
     * @description
     * Reports error data for the control with the given path.
     *
     * @param errorCode The code of the error to check
     * @param path A list of control names that designates how to move from the current control
     * to the control that should be queried for errors.
     *
     * @usageNotes
     * For example, for the following `FormGroup`:
     *
     * ```
     * form = new FormGroup({
     *   address: new FormGroup({ street: new FormControl() })
     * });
     * ```
     *
     * The path to the 'street' control from the root form would be 'address' -> 'street'.
     *
     * It can be provided to this method in one of two formats:
     *
     * 1. An array of string control names, e.g. `['address', 'street']`
     * 1. A period-delimited list of control names in one string, e.g. `'address.street'`
     *
     * @returns error data for that particular error. If the control or error is not present,
     * null is returned.
     */
    getError(errorCode: string, path?: Array<string | number> | string): any;
}


