import { BooleanInput } from '@angular/cdk/coercion';
import { ElementRef, EventEmitter, OnChanges, OnDestroy, SimpleChanges } from '@angular/core';
import { AbstractControl, ControlValueAccessor, ValidationErrors, Validator, ValidatorFn } from '@angular/forms';
import { Subject } from 'rxjs';
import { TimeAdapter } from './adapter';
import { ExtractTimeTypeFromSelection, MatTimeSelectionModel, TimeSelectionModelChange } from './time-selection-model';
import * as i0 from "@angular/core";
/**
 * An event used for timepicker input and change events. We don't always have access to a native
 * input or change event because the event may have been triggered by the user clicking on the
 * clock popup. For consistency, we always use MatTimepickerInputEvent instead.
 */
export declare class MatTimepickerInputEvent<D, S = unknown> {
    /** Reference to the timepicker input component that emitted the event. */
    target: MatTimepickerInputBase<S, D>;
    /** Reference to the native input element associated with the timepicker input. */
    targetElement: HTMLElement;
    /** The new value for the target timepicker input. */
    value: D | null;
    constructor(
    /** Reference to the timepicker input component that emitted the event. */
    target: MatTimepickerInputBase<S, D>, 
    /** Reference to the native input element associated with the timepicker input. */
    targetElement: HTMLElement);
}
export declare abstract class MatTimepickerInputBase<S, T = ExtractTimeTypeFromSelection<S>> implements OnChanges, OnDestroy, ControlValueAccessor, Validator {
    protected _elementRef: ElementRef<HTMLInputElement>;
    _timeAdapter: TimeAdapter<T>;
    /** The value of the input. */
    get value(): T | null;
    set value(value: any);
    protected _model: MatTimeSelectionModel<S, T> | undefined;
    /** Whether the timepicker-input is disabled. */
    get disabled(): boolean;
    set disabled(value: BooleanInput);
    private _disabled;
    /** Emits when a change event is fired on this <input>. */
    readonly timeChange: EventEmitter<MatTimepickerInputEvent<T, S>>;
    /** Emits when an input event is fired on this <input>. */
    readonly timeInput: EventEmitter<MatTimepickerInputEvent<T, S>>;
    /** Gets the minimum time for the input. Used for validation. */
    abstract _getMinTime(): T | null;
    /** Gets the maximum time for the input. Used for validation. */
    abstract _getMaxTime(): T | null;
    /** Combined form control validator for this input. */
    protected abstract _validator: ValidatorFn | null;
    /** Whether the component has been initialized. */
    private _isInitialized;
    /**
     * Since the value is kept on the model which is assigned in an Input,
     * we might get a value before we have a model. This property keeps track
     * of the value until we have somewhere to assign it.
     */
    private _pendingValue;
    /** Emits when the internal state has changed */
    readonly stateChanges: Subject<void>;
    _onTouched: () => void;
    _validatorOnChange: () => void;
    private _cvaOnChange;
    private _valueChangesSubscription;
    constructor(_elementRef: ElementRef<HTMLInputElement>, _timeAdapter: TimeAdapter<T>);
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
    /** Registers a time selection model with the input. */
    _registerModel(model: MatTimeSelectionModel<S, T>): void;
    _onInput(value: string): void;
    /** Handles change event on the input. */
    _onChange(): void;
    /** Handles blur event on the input. */
    _onBlur(): void;
    /** Implemented as part of ControlValueAccessor.  */
    writeValue(value: T | null): void;
    /** Implemented as part of ControlValueAccessor.  */
    registerOnChange(fn: any): void;
    /** Implemented as part of ControlValueAccessor.  */
    registerOnTouched(fn: () => void): void;
    /** Implemented as part of ControlValueAccessor.  */
    setDisabledState?(isDisabled: boolean): void;
    registerOnValidatorChange(fn: () => void): void;
    validate(c: AbstractControl): ValidationErrors | null;
    /** Whether the last value set on the input was valid. */
    protected _lastValueValid: boolean;
    /** Assigns a value to the input's model. */
    protected abstract _assignValueToModel(model: T | null): void;
    /** Converts a value from the model into a native value for the input. */
    protected abstract _getValueFromModel(modelValue: S): T | null;
    /** Predicate that determines whether the input should handle a particular change event. */
    protected abstract _shouldHandleChangeEvent(event: TimeSelectionModelChange<S>): boolean;
    /** Programmatically assigns a value to the input. */
    protected _assignValueProgrammatically(value: T | null): void;
    /** Formats a value and sets it on the input element. */
    protected _formatValue(value: T | null): void;
    /** Gets the base validator functions. */
    protected _getValidators(): ValidatorFn[];
    /** Whether a value is considered valid. */
    private _isValidValue;
    /** Assigns a value to the model. */
    private _assignValue;
    /** The form control validator for whether the input parses. */
    private _parseValidator;
    /** The form control validator for the min time. */
    private _minValidator;
    /** The form control validator for the max time. */
    private _maxValidator;
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTimepickerInputBase<any, any>, [null, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<MatTimepickerInputBase<any, any>, never, never, { "value": { "alias": "value"; "required": false; }; "disabled": { "alias": "disabled"; "required": false; }; }, { "timeChange": "timeChange"; "timeInput": "timeInput"; }, never, never, true, never>;
}
/**
 * Checks whether the `SimpleChanges` object from an `ngOnChanges`
 * callback has any changes, accounting for time objects.
 */
export declare function timeInputsHaveChanged(changes: SimpleChanges, adapter: TimeAdapter<unknown>): boolean;