import { SimpleChanges, ChangeDetectorRef, EventEmitter, AfterContentInit, AfterViewChecked, OnDestroy, OnChanges } from '@angular/core';
import { HcDatepickerIntl } from '../datepicker-intl';
import { Portal, ComponentType } from '@angular/cdk/portal';
import { HcDateFormats, D } from '../datetime/date-formats';
import { DateAdapter } from '../datetime/date-adapter';
import { Subject } from 'rxjs';
import { MultiYearViewComponent } from '../multi-year-view/multi-year-view.component';
import { HcCalendarCellCssClasses } from '../calendar-body/calendar-body.component';
import { MonthViewComponent } from '../month-view/month-view.component';
import { YearViewComponent } from '../year-view/year-view.component';
import { FormControl } from '@angular/forms';
/**
 * Possible views for the calendar.
 * @docs-private
 */
export declare type CalendarViewComponent = 'month' | 'year' | 'multi-year';
/** Default header for hcCalendar */
export declare class CalendarHeaderComponent {
    private _intl;
    calendar: CalendarComponent;
    private _dateAdapter;
    private _dateFormats;
    constructor(_intl: HcDatepickerIntl, calendar: CalendarComponent, _dateAdapter: DateAdapter<D>, _dateFormats: HcDateFormats, changeDetectorRef: ChangeDetectorRef);
    /** The label for the currently visible month */
    readonly monthButtonText: string;
    /** The label for the current calendar view. */
    readonly periodButtonText: string;
    readonly periodButtonLabel: string;
    /** The label for the currently displayed month */
    readonly monthButtonLabel: string;
    /** The label for the the previous button. */
    readonly prevButtonLabel: string;
    /** The label for the the next button. */
    readonly nextButtonLabel: string;
    /** Handles user clicks on the period label. */
    currentPeriodClicked(): void;
    /** Handles user clicks on the previous button. */
    previousClicked(): void;
    /** Handles user clicks on the next button. */
    nextClicked(): void;
    todayClicked(): void;
    todayEnabled(): boolean;
    /** Whether the previous period button is enabled. */
    previousEnabled(): boolean;
    /** Whether the next period button is enabled. */
    nextEnabled(): boolean;
    /** Whether the two dates represent the same view in the current view mode (month or year). */
    private _isSameView;
}
/**
 * A calendar that is used as part of the datepicker.
 * @docs-private
 */
export declare class CalendarComponent implements AfterContentInit, AfterViewChecked, OnDestroy, OnChanges {
    private _intl;
    private _dateAdapter;
    private _dateFormats;
    private _changeDetectorRef;
    /** An input indicating the type of the header component, if set. */
    headerComponent: ComponentType<any>;
    /** A portal containing the header component type for this calendar. */
    _calendarHeaderPortal: Portal<any>;
    /** Stores the current am/pm value */
    _period: FormControl;
    private _intlChanges;
    /**
     * Used for scheduling that focus should be moved to the active cell on the next tick.
     * We need to schedule it, rather than do it immediately, because we have to wait
     * for Angular to re-evaluate the view children.
     */
    private _moveFocusOnNextTick;
    /** A date representing the period (month or year) to start the calendar in. */
    startAt: D | null;
    private _startAt;
    /** Whether the calendar should be started in month or year view. */
    startView: CalendarViewComponent;
    /** Whether the calendar should show calendar, time-picker, or both */
    mode: 'date' | 'time' | 'date-time';
    /** Whether the time picker should display a 12-hour or 24-clock. Accepts 12 or 24. Defaults to 12. */
    hourCycle: string | number;
    _hourCycle: number;
    /** The currently selected date. */
    selected: D | null;
    private _selected;
    /** The minimum selectable date. */
    minDate: D | null;
    private _minDate;
    /** The maximum selectable date. */
    maxDate: D | null;
    private _maxDate;
    /** Function used to filter which dates are selectable. */
    dateFilter: (date: D) => boolean;
    /** Function that can be used to add custom CSS classes to dates. */
    dateClass: (date: D) => HcCalendarCellCssClasses;
    /** Emits when the currently selected date changes. */
    readonly selectedChange: EventEmitter<D>;
    /**
     * Emits the year chosen in multiyear view.
     * This doesn't imply a change on the selected date.
     */
    readonly yearSelected: EventEmitter<D>;
    /**
     * Emits the month chosen in year view.
     * This doesn't imply a change on the selected date.
     */
    readonly monthSelected: EventEmitter<D>;
    /** Emits when any date is selected. */
    readonly _userSelection: EventEmitter<void>;
    /** Reference to the current month view component. */
    monthView: MonthViewComponent;
    /** Reference to the current year view component. */
    yearView: YearViewComponent;
    /** Reference to the current multi-year view component. */
    multiYearView: MultiYearViewComponent;
    /**
     * The current active date. This determines which time period is shown and which date is
     * highlighted when using keyboard navigation.
     */
    activeDate: D;
    private _clampedActiveDate;
    /** Whether the calendar is in month view. */
    currentView: CalendarViewComponent;
    private _currentView;
    /**
     * Emits whenever there is a state change that the header may need to respond to.
     */
    stateChanges: Subject<void>;
    /** A string containing the value of minutes for the current date */
    minutes: string | null;
    /** A string containing the hour for the current date */
    hours: string | null;
    _periodChange(): void;
    constructor(_intl: HcDatepickerIntl, _dateAdapter: DateAdapter<D>, _dateFormats: HcDateFormats, _changeDetectorRef: ChangeDetectorRef);
    ngAfterContentInit(): void;
    ngAfterViewChecked(): void;
    ngOnDestroy(): void;
    ngOnChanges(changes: SimpleChanges): void;
    focusActiveCell(): void;
    /** Updates today's date after an update of the active date */
    updateTodaysDate(): void;
    /** The label for the jump to today button */
    readonly _todayButtonLabel: string;
    /** Handles clicks on the Jump to current date button */
    _todayClicked(): void;
    _todayEnabled(): boolean;
    /** Handles date selection in the month view. */
    _dateSelected(date: D): void;
    /** Handles year selection in the multiyear view. */
    _yearSelectedInMultiYearView(normalizedYear: D): void;
    /** Handles month selection in the year view. */
    _monthSelectedInYearView(normalizedMonth: D): void;
    _userSelected(): void;
    /** Handles year/month selection in the multi-year/year views. */
    _goToDateInView(date: D, view: 'month' | 'year' | 'multi-year'): void;
    /**
     * @param obj The object to check.
     * @returns The given object if it is both a date instance and valid, otherwise null.
     */
    private _getValidDateOrNull;
    /** Returns the component instance that corresponds to the current calendar view. */
    private _getCurrentViewComponent;
    _hoursUp(): void;
    _hoursDown(): void;
    _minutesUp(): void;
    _minutesDown(): void;
}