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Web component providing a date selection field with scrollable month calendar
/**
* @license
* Copyright (c) 2016 - 2024 Vaadin Ltd.
* This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
*/
import { hideOthers } from '@vaadin/a11y-base/src/aria-hidden.js';
import { DelegateFocusMixin } from '@vaadin/a11y-base/src/delegate-focus-mixin.js';
import { isKeyboardActive } from '@vaadin/a11y-base/src/focus-utils.js';
import { KeyboardMixin } from '@vaadin/a11y-base/src/keyboard-mixin.js';
import { isIOS } from '@vaadin/component-base/src/browser-utils.js';
import { ControllerMixin } from '@vaadin/component-base/src/controller-mixin.js';
import { MediaQueryController } from '@vaadin/component-base/src/media-query-controller.js';
import { OverlayClassMixin } from '@vaadin/component-base/src/overlay-class-mixin.js';
import { InputConstraintsMixin } from '@vaadin/field-base/src/input-constraints-mixin.js';
import { VirtualKeyboardController } from '@vaadin/field-base/src/virtual-keyboard-controller.js';
import {
dateAllowed,
dateEquals,
extractDateParts,
formatISODate,
getAdjustedYear,
getClosestDate,
parseDate,
} from './vaadin-date-picker-helper.js';
/**
* @polymerMixin
* @mixes ControllerMixin
* @mixes DelegateFocusMixin
* @mixes InputConstraintsMixin
* @mixes KeyboardMixin
* @mixes OverlayClassMixin
* @param {function(new:HTMLElement)} subclass
*/
export const DatePickerMixin = (subclass) =>
class DatePickerMixinClass extends OverlayClassMixin(
ControllerMixin(DelegateFocusMixin(InputConstraintsMixin(KeyboardMixin(subclass)))),
) {
static get properties() {
return {
/**
* The current selected date.
* @type {Date | undefined}
* @protected
*/
_selectedDate: {
type: Object,
sync: true,
},
/**
* @type {Date | undefined}
* @protected
*/
_focusedDate: {
type: Object,
sync: true,
},
/**
* Selected date.
*
* Supported date formats:
* - ISO 8601 `"YYYY-MM-DD"` (default)
* - 6-digit extended ISO 8601 `"+YYYYYY-MM-DD"`, `"-YYYYYY-MM-DD"`
*
* @type {string}
*/
value: {
type: String,
notify: true,
value: '',
sync: true,
},
/**
* Date which should be visible when there is no value selected.
*
* The same date formats as for the `value` property are supported.
* @attr {string} initial-position
*/
initialPosition: String,
/**
* Set true to open the date selector overlay.
*/
opened: {
type: Boolean,
reflectToAttribute: true,
notify: true,
observer: '_openedChanged',
sync: true,
},
/**
* Set true to prevent the overlay from opening automatically.
* @attr {boolean} auto-open-disabled
*/
autoOpenDisabled: Boolean,
/**
* Set true to display ISO-8601 week numbers in the calendar. Notice that
* displaying week numbers is only supported when `i18n.firstDayOfWeek`
* is 1 (Monday).
* @attr {boolean} show-week-numbers
*/
showWeekNumbers: {
type: Boolean,
value: false,
sync: true,
},
/**
* @type {boolean}
* @protected
*/
_fullscreen: {
type: Boolean,
value: false,
sync: true,
},
/**
* @type {string}
* @protected
*/
_fullscreenMediaQuery: {
value: '(max-width: 420px), (max-height: 420px)',
},
/**
* The object used to localize this component.
* To change the default localization, replace the entire
* `i18n` object with a custom one.
*
* To update individual properties, extend the existing i18n object like so:
* ```
* datePicker.i18n = { ...datePicker.i18n, {
* formatDate: date => { ... },
* parseDate: value => { ... },
* }};
* ```
*
* The object has the following JSON structure and default values:
*
* ```
* {
* // An array with the full names of months starting
* // with January.
* monthNames: [
* 'January', 'February', 'March', 'April', 'May',
* 'June', 'July', 'August', 'September',
* 'October', 'November', 'December'
* ],
*
* // An array of weekday names starting with Sunday. Used
* // in screen reader announcements.
* weekdays: [
* 'Sunday', 'Monday', 'Tuesday', 'Wednesday',
* 'Thursday', 'Friday', 'Saturday'
* ],
*
* // An array of short weekday names starting with Sunday.
* // Displayed in the calendar.
* weekdaysShort: [
* 'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'
* ],
*
* // An integer indicating the first day of the week
* // (0 = Sunday, 1 = Monday, etc.).
* firstDayOfWeek: 0,
*
* // Translation of the Today shortcut button text.
* today: 'Today',
*
* // Translation of the Cancel button text.
* cancel: 'Cancel',
*
* // Used for adjusting the year value when parsing dates with short years.
* // The year values between 0 and 99 are evaluated and adjusted.
* // Example: for a referenceDate of 1970-10-30;
* // dateToBeParsed: 40-10-30, result: 1940-10-30
* // dateToBeParsed: 80-10-30, result: 1980-10-30
* // dateToBeParsed: 10-10-30, result: 2010-10-30
* // Supported date format: ISO 8601 `"YYYY-MM-DD"` (default)
* // The default value is the current date.
* referenceDate: '',
*
* // A function to format given `Object` as
* // date string. Object is in the format `{ day: ..., month: ..., year: ... }`
* // Note: The argument month is 0-based. This means that January = 0 and December = 11.
* formatDate: d => {
* // returns a string representation of the given
* // object in 'MM/DD/YYYY' -format
* },
*
* // A function to parse the given text to an `Object` in the format `{ day: ..., month: ..., year: ... }`.
* // Must properly parse (at least) text formatted by `formatDate`.
* // Setting the property to null will disable keyboard input feature.
* // Note: The argument month is 0-based. This means that January = 0 and December = 11.
* parseDate: text => {
* // Parses a string in 'MM/DD/YY', 'MM/DD' or 'DD' -format to
* // an `Object` in the format `{ day: ..., month: ..., year: ... }`.
* }
*
* // A function to format given `monthName` and
* // `fullYear` integer as calendar title string.
* formatTitle: (monthName, fullYear) => {
* return monthName + ' ' + fullYear;
* }
* }
* ```
*
* @type {!DatePickerI18n}
* @default {English/US}
*/
i18n: {
type: Object,
sync: true,
value: () => {
return {
monthNames: [
'January',
'February',
'March',
'April',
'May',
'June',
'July',
'August',
'September',
'October',
'November',
'December',
],
weekdays: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
weekdaysShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
firstDayOfWeek: 0,
today: 'Today',
cancel: 'Cancel',
referenceDate: '',
formatDate(d) {
const yearStr = String(d.year).replace(/\d+/u, (y) => '0000'.substr(y.length) + y);
return [d.month + 1, d.day, yearStr].join('/');
},
parseDate(text) {
const parts = text.split('/');
const today = new Date();
let date,
month = today.getMonth(),
year = today.getFullYear();
if (parts.length === 3) {
month = parseInt(parts[0]) - 1;
date = parseInt(parts[1]);
year = parseInt(parts[2]);
if (parts[2].length < 3 && year >= 0) {
const usedReferenceDate = this.referenceDate ? parseDate(this.referenceDate) : new Date();
year = getAdjustedYear(usedReferenceDate, year, month, date);
}
} else if (parts.length === 2) {
month = parseInt(parts[0]) - 1;
date = parseInt(parts[1]);
} else if (parts.length === 1) {
date = parseInt(parts[0]);
}
if (date !== undefined) {
return { day: date, month, year };
}
},
formatTitle: (monthName, fullYear) => {
return `${monthName} ${fullYear}`;
},
};
},
},
/**
* The earliest date that can be selected. All earlier dates will be disabled.
*
* Supported date formats:
* - ISO 8601 `"YYYY-MM-DD"` (default)
* - 6-digit extended ISO 8601 `"+YYYYYY-MM-DD"`, `"-YYYYYY-MM-DD"`
*
* @type {string | undefined}
*/
min: {
type: String,
sync: true,
},
/**
* The latest date that can be selected. All later dates will be disabled.
*
* Supported date formats:
* - ISO 8601 `"YYYY-MM-DD"` (default)
* - 6-digit extended ISO 8601 `"+YYYYYY-MM-DD"`, `"-YYYYYY-MM-DD"`
*
* @type {string | undefined}
*/
max: {
type: String,
sync: true,
},
/**
* A function to be used to determine whether the user can select a given date.
* Receives a `DatePickerDate` object of the date to be selected and should return a
* boolean.
*
* @type {function(DatePickerDate): boolean | undefined}
*/
isDateDisabled: {
type: Function,
},
/**
* The earliest date that can be selected. All earlier dates will be disabled.
* @type {Date | undefined}
* @protected
*/
_minDate: {
type: Date,
computed: '__computeMinOrMaxDate(min)',
sync: true,
},
/**
* The latest date that can be selected. All later dates will be disabled.
* @type {Date | undefined}
* @protected
*/
_maxDate: {
type: Date,
computed: '__computeMinOrMaxDate(max)',
sync: true,
},
/** @private */
_noInput: {
type: Boolean,
computed: '_isNoInput(inputElement, _fullscreen, _ios, i18n, opened, autoOpenDisabled)',
},
/** @private */
_ios: {
type: Boolean,
value: isIOS,
},
/** @private */
_focusOverlayOnOpen: Boolean,
/** @private */
_overlayContent: {
type: Object,
sync: true,
},
/**
* In date-picker, unlike other components extending `InputMixin`,
* the property indicates true only if the input has been entered by the user.
* In the case of programmatic changes, the property is reset to false.
* Read more about why this workaround is needed:
* https://github.com/vaadin/web-components/issues/5639
*
* @protected
* @override
*/
_hasInputValue: {
type: Boolean,
},
};
}
static get observers() {
return [
'_selectedDateChanged(_selectedDate, i18n)',
'_focusedDateChanged(_focusedDate, i18n)',
'__updateOverlayContent(_overlayContent, i18n, label, _minDate, _maxDate, _focusedDate, _selectedDate, showWeekNumbers, isDateDisabled)',
'__updateOverlayContentTheme(_overlayContent, _theme)',
'__updateOverlayContentFullScreen(_overlayContent, _fullscreen)',
];
}
static get constraints() {
return [...super.constraints, 'min', 'max'];
}
constructor() {
super();
this._boundOnClick = this._onClick.bind(this);
this._boundOnScroll = this._onScroll.bind(this);
this._boundOverlayRenderer = this._overlayRenderer.bind(this);
}
/**
* @override
* @protected
*/
get _inputElementValue() {
return super._inputElementValue;
}
/**
* The setter is overridden to reset the `_hasInputValue` property
* to false when the input element's value is updated programmatically.
* In date-picker, `_hasInputValue` is supposed to indicate true only
* if the input has been entered by the user.
* Read more about why this workaround is needed:
* https://github.com/vaadin/web-components/issues/5639
*
* @override
* @protected
*/
set _inputElementValue(value) {
super._inputElementValue = value;
this._hasInputValue = false;
}
/**
* Override a getter from `InputControlMixin` to make it optional
* and to prevent warning when a clear button is missing,
* for example when using .
* @protected
* @return {Element | null | undefined}
*/
get clearElement() {
return null;
}
/** @private */
get _nativeInput() {
if (this.inputElement) {
// TODO: support focusElement for backwards compatibility
return this.inputElement.focusElement || this.inputElement;
}
return null;
}
/**
* The input element's value when it cannot be parsed as a date, and an empty string otherwise.
*
* @return {string}
* @private
*/
get __unparsableValue() {
if (!this._inputElementValue || this.__parseDate(this._inputElementValue)) {
return '';
}
return this._inputElementValue;
}
/**
* Override an event listener from `DelegateFocusMixin`
* @protected
*/
_onFocus(event) {
super._onFocus(event);
if (this._noInput && !isKeyboardActive()) {
event.target.blur();
}
}
/**
* Override an event listener from `DelegateFocusMixin`
* @protected
*/
_onBlur(event) {
super._onBlur(event);
if (!this.opened) {
this.__commitParsedOrFocusedDate();
// Do not validate when focusout is caused by document
// losing focus, which happens on browser tab switch.
if (document.hasFocus()) {
this.validate();
}
}
}
/** @protected */
ready() {
super.ready();
this.addEventListener('click', this._boundOnClick);
this.addController(
new MediaQueryController(this._fullscreenMediaQuery, (matches) => {
this._fullscreen = matches;
}),
);
this.addController(new VirtualKeyboardController(this));
const overlay = this.$.overlay;
this._overlayElement = overlay;
overlay.renderer = this._boundOverlayRenderer;
this.addEventListener('mousedown', () => this.__bringToFront());
this.addEventListener('touchstart', () => this.__bringToFront());
}
/** @protected */
disconnectedCallback() {
super.disconnectedCallback();
this.opened = false;
}
/**
* Opens the dropdown.
*/
open() {
if (!this.disabled && !this.readonly) {
this.opened = true;
}
}
/**
* Closes the dropdown.
*/
close() {
this.$.overlay.close();
}
/** @private */
_overlayRenderer(root) {
if (root.firstChild) {
return;
}
// Create and store document content element
const content = document.createElement('vaadin-date-picker-overlay-content');
root.appendChild(content);
this._overlayContent = content;
content.addEventListener('close', () => {
this._close();
});
content.addEventListener('focus-input', this._focusAndSelect.bind(this));
// User confirmed selected date by clicking the calendar.
content.addEventListener('date-tap', (e) => {
this.__commitDate(e.detail.date);
this._close();
});
// User confirmed selected date by pressing Enter, Space, or Today.
content.addEventListener('date-selected', (e) => {
this.__commitDate(e.detail.date);
});
// Set focus-ring attribute when moving focus to the overlay
// by pressing Tab or arrow key, after opening it on click.
content.addEventListener('focusin', () => {
if (this._keyboardActive) {
this._setFocused(true);
}
});
content.addEventListener('focusout', (event) => {
if (this._shouldRemoveFocus(event)) {
this._setFocused(false);
}
});
// Two-way data binding for `focusedDate` property
content.addEventListener('focused-date-changed', (e) => {
this._focusedDate = e.detail.value;
});
content.addEventListener('click', (e) => e.stopPropagation());
}
/**
* @param {string} dateString
* @private
*/
__parseDate(dateString) {
if (!this.i18n.parseDate) {
return;
}
let dateObject = this.i18n.parseDate(dateString);
if (dateObject) {
dateObject = parseDate(`${dateObject.year}-${dateObject.month + 1}-${dateObject.day}`);
}
if (dateObject && !isNaN(dateObject.getTime())) {
return dateObject;
}
}
/**
* @param {Date} dateObject
* @private
*/
__formatDate(dateObject) {
if (this.i18n.formatDate) {
return this.i18n.formatDate(extractDateParts(dateObject));
}
}
/**
* Returns true if the current input value satisfies all constraints (if any)
*
* Override the `checkValidity` method for custom validations.
*
* @return {boolean} True if the value is valid
*/
checkValidity() {
const inputValue = this._inputElementValue;
const inputValid = !inputValue || (!!this._selectedDate && inputValue === this.__formatDate(this._selectedDate));
const isDateValid =
!this._selectedDate || dateAllowed(this._selectedDate, this._minDate, this._maxDate, this.isDateDisabled);
let inputValidity = true;
if (this.inputElement) {
if (this.inputElement.checkValidity) {
inputValidity = this.inputElement.checkValidity();
} else if (this.inputElement.validate) {
// Iron-form-elements have the validate API
inputValidity = this.inputElement.validate();
}
}
return inputValid && isDateValid && inputValidity;
}
/**
* Override method inherited from `FocusMixin`
* to not call `_setFocused(true)` when focus
* is restored after closing overlay on click,
* and to avoid removing `focus-ring` attribute.
*
* @param {!FocusEvent} _event
* @return {boolean}
* @protected
* @override
*/
_shouldSetFocus(_event) {
return !this._shouldKeepFocusRing;
}
/**
* Override method inherited from `FocusMixin`
* to prevent removing the `focused` attribute:
* - when moving focus to the overlay content,
* - when closing on date click / outside click.
*
* @param {FocusEvent} event
* @return {boolean}
* @protected
* @override
*/
_shouldRemoveFocus(event) {
// Remove the focused state when clicking outside on a focusable element that is deliberately
// made targetable with pointer-events: auto, such as the time-picker in the date-time-picker.
// In this scenario, focus will move straight to that element and the closing overlay won't
// attempt to restore focus to the input.
const { relatedTarget } = event;
if (
this.opened &&
relatedTarget !== null &&
relatedTarget !== document.body &&
!this.contains(relatedTarget) &&
!this._overlayContent.contains(relatedTarget)
) {
return true;
}
return !this.opened;
}
/**
* Override method inherited from `FocusMixin`
* to store the `focus-ring` state to restore
* it later when closing on outside click.
*
* @param {boolean} focused
* @protected
* @override
*/
_setFocused(focused) {
super._setFocused(focused);
this._shouldKeepFocusRing = focused && this._keyboardActive;
}
/**
* Depending on the nature of the value change that has occurred since
* the last commit attempt, triggers validation and fires an event:
*
* Value change | Event
* :------------------------|:------------------
* empty => parsable | change
* empty => unparsable | unparsable-change
* parsable => empty | change
* parsable => parsable | change
* parsable => unparsable | change
* unparsable => empty | unparsable-change
* unparsable => parsable | change
* unparsable => unparsable | unparsable-change
*
* @private
*/
__commitValueChange() {
const unparsableValue = this.__unparsableValue;
if (this.__committedValue !== this.value) {
this.validate();
this.dispatchEvent(new CustomEvent('change', { bubbles: true }));
} else if (this.__committedUnparsableValue !== unparsableValue) {
this.validate();
this.dispatchEvent(new CustomEvent('unparsable-change'));
}
this.__committedValue = this.value;
this.__committedUnparsableValue = unparsableValue;
}
/**
* Sets the given date as the value and commits it.
*
* @param {Date} date
* @private
*/
__commitDate(date) {
// Prevent the value observer from treating the following value change
// as initiated programmatically by the developer, and therefore
// from automatically committing it without a change event.
this.__keepCommittedValue = true;
this._selectedDate = date;
this.__keepCommittedValue = false;
this.__commitValueChange();
}
/** @private */
_close() {
this._focus();
this.close();
}
/** @private */
__bringToFront() {
requestAnimationFrame(() => {
this.$.overlay.bringToFront();
});
}
/** @private */
// eslint-disable-next-line @typescript-eslint/max-params
_isNoInput(inputElement, fullscreen, ios, i18n, opened, autoOpenDisabled) {
// On fullscreen mode, text input is disabled if auto-open isn't disabled or
// whenever the dropdown is opened
const noInputOnFullscreenMode = fullscreen && (!autoOpenDisabled || opened);
// On iOS, text input is disabled whenever the dropdown is opened, because
// the virtual keyboard doesn't affect the viewport metrics and thus the
// dropdown could get covered by the keyboard.
const noInputOnIos = ios && opened;
return !inputElement || noInputOnFullscreenMode || noInputOnIos || !i18n.parseDate;
}
/** @private */
_formatISO(date) {
return formatISODate(date);
}
/** @protected */
_inputElementChanged(input) {
super._inputElementChanged(input);
if (input) {
input.autocomplete = 'off';
input.setAttribute('role', 'combobox');
input.setAttribute('aria-haspopup', 'dialog');
input.setAttribute('aria-expanded', !!this.opened);
this._applyInputValue(this._selectedDate);
}
}
/** @protected */
_openedChanged(opened) {
if (this.inputElement) {
this.inputElement.setAttribute('aria-expanded', opened);
}
}
/** @private */
_selectedDateChanged(selectedDate, i18n) {
if (selectedDate === undefined || i18n === undefined) {
return;
}
if (!this.__keepInputValue) {
this._applyInputValue(selectedDate);
}
this.value = this._formatISO(selectedDate);
this._ignoreFocusedDateChange = true;
this._focusedDate = selectedDate;
this._ignoreFocusedDateChange = false;
}
/** @private */
_focusedDateChanged(focusedDate, i18n) {
if (focusedDate === undefined || i18n === undefined) {
return;
}
if (!this._ignoreFocusedDateChange && !this._noInput) {
this._applyInputValue(focusedDate);
}
}
/**
* Override the value observer from `InputMixin` to implement custom
* handling of the `value` property. The date-picker doesn't forward
* the value directly to the input like the default implementation of `InputMixin`.
* Instead, it parses the value into a date, puts it in `_selectedDate` which
* is then displayed in the input with respect to the specified date format.
*
* @param {string | undefined} value
* @param {string | undefined} oldValue
* @protected
* @override
*/
_valueChanged(value, oldValue) {
const newDate = parseDate(value);
if (value && !newDate) {
// The new value cannot be parsed, revert the old value.
this.value = oldValue;
return;
}
if (value) {
if (!dateEquals(this._selectedDate, newDate)) {
// Update the date instance only if the date has actually changed.
this._selectedDate = newDate;
if (oldValue !== undefined) {
// Validate only if `value` changes after initialization.
this.validate();
}
}
} else {
this._selectedDate = null;
}
if (!this.__keepCommittedValue) {
this.__committedValue = this.value;
this.__committedUnparsableValue = '';
}
this._toggleHasValue(this._hasValue);
}
/** @private */
// eslint-disable-next-line @typescript-eslint/max-params
__updateOverlayContent(
overlayContent,
i18n,
label,
minDate,
maxDate,
focusedDate,
selectedDate,
showWeekNumbers,
isDateDisabled,
) {
if (overlayContent) {
overlayContent.i18n = i18n;
overlayContent.label = label;
overlayContent.minDate = minDate;
overlayContent.maxDate = maxDate;
overlayContent.focusedDate = focusedDate;
overlayContent.selectedDate = selectedDate;
overlayContent.showWeekNumbers = showWeekNumbers;
overlayContent.isDateDisabled = isDateDisabled;
}
}
/** @private */
__updateOverlayContentTheme(overlayContent, theme) {
if (overlayContent) {
if (theme) {
overlayContent.setAttribute('theme', theme);
} else {
overlayContent.removeAttribute('theme');
}
}
}
/** @private */
__updateOverlayContentFullScreen(overlayContent, fullscreen) {
if (overlayContent) {
overlayContent.toggleAttribute('fullscreen', fullscreen);
}
}
/** @protected */
_onOverlayEscapePress() {
this._focusedDate = this._selectedDate;
this._closedByEscape = true;
this._close();
this._closedByEscape = false;
}
/** @protected */
_onOverlayOpened() {
const content = this._overlayContent;
content.reset();
// Detect which date to show
const initialPosition = this._getInitialPosition();
content.initialPosition = initialPosition;
// Scroll the date into view
const scrollFocusDate = content.focusedDate || initialPosition;
content.scrollToDate(scrollFocusDate);
// Ensure the date is focused
this._ignoreFocusedDateChange = true;
content.focusedDate = scrollFocusDate;
this._ignoreFocusedDateChange = false;
window.addEventListener('scroll', this._boundOnScroll, true);
if (this._focusOverlayOnOpen) {
content.focusDateElement();
this._focusOverlayOnOpen = false;
} else {
this._focus();
}
const input = this._nativeInput;
if (this._noInput && input) {
input.blur();
this._overlayContent.focusDateElement();
}
const focusables = this._noInput ? content : [input, content];
this.__showOthers = hideOthers(focusables);
}
/** @private */
_getInitialPosition() {
const parsedInitialPosition = parseDate(this.initialPosition);
const initialPosition =
this._selectedDate || this._overlayContent.initialPosition || parsedInitialPosition || new Date();
return parsedInitialPosition || dateAllowed(initialPosition, this._minDate, this._maxDate, this.isDateDisabled)
? initialPosition
: this._minDate || this._maxDate
? getClosestDate(initialPosition, [this._minDate, this._maxDate])
: new Date();
}
/**
* Tries to parse the input element's value as a date. If the input value
* is parsable, commits the resulting date as the value. Otherwise, commits
* an empty string as the value. If no i18n parser is provided, commits
* the focused date as the value.
*
* @private
*/
__commitParsedOrFocusedDate() {
// Select the parsed input or focused date
this._ignoreFocusedDateChange = true;
if (this.i18n.parseDate) {
const inputValue = this._inputElementValue || '';
const parsedDate = this.__parseDate(inputValue);
if (parsedDate) {
this.__commitDate(parsedDate);
} else {
this.__keepInputValue = true;
this.__commitDate(null);
this.__keepInputValue = false;
}
} else if (this._focusedDate) {
this.__commitDate(this._focusedDate);
}
this._ignoreFocusedDateChange = false;
}
/** @protected */
_onOverlayClosed() {
// Reset `aria-hidden` state.
if (this.__showOthers) {
this.__showOthers();
this.__showOthers = null;
}
window.removeEventListener('scroll', this._boundOnScroll, true);
if (this._closedByEscape) {
this._applyInputValue(this._selectedDate);
}
this.__commitParsedOrFocusedDate();
if (this._nativeInput && this._nativeInput.selectionStart) {
this._nativeInput.selectionStart = this._nativeInput.selectionEnd;
}
// No need to revalidate the value after `_selectedDateChanged`
// Needed in case the value was not changed: open and close dropdown,
// especially on outside click. On Esc key press, do not validate.
if (!this.value && !this._keyboardActive) {
this.validate();
}
}
/** @private */
_onScroll(e) {
if (e.target === window || !this._overlayContent.contains(e.target)) {
this._overlayContent._repositionYearScroller();
}
}
/** @protected */
_focus() {
if (!this._noInput) {
this.inputElement.focus();
}
}
/** @private */
_focusAndSelect() {
this._focus();
this._setSelectionRange(0, this._inputElementValue.length);
}
/** @private */
_applyInputValue(date) {
this._inputElementValue = date ? this.__formatDate(date) : '';
}
/** @private */
_setSelectionRange(a, b) {
if (this._nativeInput && this._nativeInput.setSelectionRange) {
this._nativeInput.setSelectionRange(a, b);
}
}
/**
* Override an event listener from `InputConstraintsMixin`
* to have date-picker fully control when to fire a change event
* and trigger validation.
*
* @protected
*/
_onChange(event) {
event.stopPropagation();
}
/**
* @param {Event} event
* @private
*/
_onClick(event) {
// Clear button click is handled in separate listener
// but bubbles to the host, so we need to ignore it.
if (!this._isClearButton(event)) {
this._onHostClick(event);
}
}
/**
* @param {Event} event
* @private
*/
_onHostClick(event) {
if (!this.autoOpenDisabled || this._noInput) {
event.preventDefault();
this.open();
}
}
/**
* Override an event listener from `InputControlMixin`
* to validate and dispatch change on clear.
* @protected
*/
_onClearButtonClick(event) {
event.preventDefault();
this.__commitDate(null);
}
/**
* Override an event listener from `KeyboardMixin`.
* @param {KeyboardEvent} e
* @protected
* @override
*/
_onKeyDown(e) {
super._onKeyDown(e);
if (this._noInput) {
// The input element cannot be readonly as it would conflict with
// the required attribute. Both are not allowed on an input element.
// Therefore we prevent default on most keydown events.
const allowedKeys = [
9, // Tab
];
if (allowedKeys.indexOf(e.keyCode) === -1) {
e.preventDefault();
}
}
switch (e.key) {
case 'ArrowDown':
case 'ArrowUp':
// Prevent scrolling the page with arrows
e.preventDefault();
if (this.opened) {
// The overlay can be opened with ctrl + option + shift in VoiceOver
// and without this logic, it won't be possible to focus the dialog opened this way.
this._overlayContent.focusDateElement();
} else {
this._focusOverlayOnOpen = true;
this.open();
}
break;
case 'Tab':
if (this.opened) {
e.preventDefault();
e.stopPropagation();
// Clear the selection range (remains visible on IE)
this._setSelectionRange(0, 0);
if (e.shiftKey) {
this._overlayContent.focusCancel();
} else {
this._overlayContent.focusDateElement();
}
}
break;
default:
break;
}
}
/**
* Override an event listener from `KeyboardMixin`.
*
* @param {!KeyboardEvent} _event
* @protected
* @override
*/
_onEnter(_event) {
if (this.opened) {
// Closing will implicitly select parsed or focused date
this.close();
} else {
this.__commitParsedOrFocusedDate();
}
}
/**
* Override an event listener from `KeyboardMixin`.
* Do not call `super` in order to override clear
* button logic defined in `InputControlMixin`.
*
* @param {!KeyboardEvent} event
* @protected
* @override
*/
_onEscape(event) {
// Closing overlay is handled in vaadin-overlay-escape-press event listener.
if (this.opened) {
return;
}
if (this.clearButtonVisible && !!this.value) {
// Stop event from propagating to the host element
// to avoid closing dialog when clearing on Esc
event.stopPropagation();
this._onClearButtonClick(event);
return;
}
if (this.inputElement.value === '') {
// Do not restore selected date if Esc was pressed after clearing input field
this.__commitDate(null);
} else {
this._applyInputValue(this._selectedDate);
}
}
/** @protected */
_isClearButton(event) {
return event.composedPath()[0] === this.clearElement;
}
/**
* Override an event listener from `InputMixin`
* @protected
*/
_onInput() {
if (!this.opened && this._inputElementValue && !this.autoOpenDisabled) {
this.open();
}
if (this._inputElementValue) {
const parsedDate = this.__parseDate(this._inputElementValue);
if (parsedDate) {
this._ignoreFocusedDateChange = true;
if (!dateEquals(parsedDate, this._focusedDate)) {
this._focusedDate = parsedDate;
}
this._ignoreFocusedDateChange = false;
}
}
}
/** @private */
__computeMinOrMaxDate(dateString) {
return parseDate(dateString);
}
/**
* Fired when the user commits a value change.
*
* @event change
*/
/**
* Fired when `value` property value changes.
*
* @event value-changed
*/
/**
* Fired when `opened` property value changes.
*
* @event opened-changed
*/
};
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