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import { Vue } from '../../vue'
import { NAME_CALENDAR } from '../../constants/components'
import {
CALENDAR_GREGORY,
CALENDAR_LONG,
CALENDAR_NARROW,
CALENDAR_SHORT,
DATE_FORMAT_2_DIGIT,
DATE_FORMAT_NUMERIC
} from '../../constants/date'
import { EVENT_NAME_CONTEXT, EVENT_NAME_SELECTED } from '../../constants/events'
import {
CODE_DOWN,
CODE_END,
CODE_ENTER,
CODE_HOME,
CODE_LEFT,
CODE_PAGEDOWN,
CODE_PAGEUP,
CODE_RIGHT,
CODE_SPACE,
CODE_UP
} from '../../constants/key-codes'
import {
PROP_TYPE_ARRAY_STRING,
PROP_TYPE_BOOLEAN,
PROP_TYPE_DATE_STRING,
PROP_TYPE_FUNCTION,
PROP_TYPE_NUMBER_STRING,
PROP_TYPE_OBJECT,
PROP_TYPE_STRING
} from '../../constants/props'
import {
SLOT_NAME_NAV_NEXT_DECADE,
SLOT_NAME_NAV_NEXT_MONTH,
SLOT_NAME_NAV_NEXT_YEAR,
SLOT_NAME_NAV_PEV_DECADE,
SLOT_NAME_NAV_PEV_MONTH,
SLOT_NAME_NAV_PEV_YEAR,
SLOT_NAME_NAV_THIS_MONTH
} from '../../constants/slots'
import { arrayIncludes, concat } from '../../utils/array'
import {
createDate,
createDateFormatter,
constrainDate,
datesEqual,
firstDateOfMonth,
formatYMD,
lastDateOfMonth,
oneMonthAgo,
oneMonthAhead,
oneYearAgo,
oneYearAhead,
oneDecadeAgo,
oneDecadeAhead,
parseYMD,
resolveLocale
} from '../../utils/date'
import { attemptBlur, attemptFocus, requestAF } from '../../utils/dom'
import { stopEvent } from '../../utils/events'
import { identity } from '../../utils/identity'
import { isArray, isPlainObject, isString } from '../../utils/inspect'
import { isLocaleRTL } from '../../utils/locale'
import { looseEqual } from '../../utils/loose-equal'
import { mathMax } from '../../utils/math'
import { makeModelMixin } from '../../utils/model'
import { toInteger } from '../../utils/number'
import { sortKeys } from '../../utils/object'
import { hasPropFunction, makeProp, makePropsConfigurable } from '../../utils/props'
import { toString } from '../../utils/string'
import { attrsMixin } from '../../mixins/attrs'
import { idMixin, props as idProps } from '../../mixins/id'
import { normalizeSlotMixin } from '../../mixins/normalize-slot'
import {
BIconChevronLeft,
BIconChevronDoubleLeft,
BIconChevronBarLeft,
BIconCircleFill
} from '../../icons/icons'
// --- Constants ---
const {
mixin: modelMixin,
props: modelProps,
prop: MODEL_PROP_NAME,
event: MODEL_EVENT_NAME
} = makeModelMixin('value', { type: PROP_TYPE_DATE_STRING })
// --- Props ---
export const props = makePropsConfigurable(
sortKeys({
...idProps,
...modelProps,
ariaControls: makeProp(PROP_TYPE_STRING),
// Makes calendar the full width of its parent container
block: makeProp(PROP_TYPE_BOOLEAN, false),
dateDisabledFn: makeProp(PROP_TYPE_FUNCTION),
// `Intl.DateTimeFormat` object
dateFormatOptions: makeProp(PROP_TYPE_OBJECT, {
year: DATE_FORMAT_NUMERIC,
month: CALENDAR_LONG,
day: DATE_FORMAT_NUMERIC,
weekday: CALENDAR_LONG
}),
// Function to set a class of (classes) on the date cell
// if passed a string or an array
// TODO:
// If the function returns an object, look for class prop for classes,
// and other props for handling events/details/descriptions
dateInfoFn: makeProp(PROP_TYPE_FUNCTION),
// 'ltr', 'rtl', or `null` (for auto detect)
direction: makeProp(PROP_TYPE_STRING),
disabled: makeProp(PROP_TYPE_BOOLEAN, false),
// When `true`, renders a comment node, but keeps the component instance active
// Mainly for <b-form-date>, so that we can get the component's value and locale
// But we might just use separate date formatters, using the resolved locale
// (adjusted for the gregorian calendar)
hidden: makeProp(PROP_TYPE_BOOLEAN, false),
// When `true` makes the selected date header `sr-only`
hideHeader: makeProp(PROP_TYPE_BOOLEAN, false),
// This specifies the calendar year/month/day that will be shown when
// first opening the datepicker if no v-model value is provided
// Default is the current date (or `min`/`max`)
initialDate: makeProp(PROP_TYPE_DATE_STRING),
// Labels for buttons and keyboard shortcuts
labelCalendar: makeProp(PROP_TYPE_STRING, 'Calendar'),
labelCurrentMonth: makeProp(PROP_TYPE_STRING, 'Current month'),
labelHelp: makeProp(PROP_TYPE_STRING, 'Use cursor keys to navigate calendar dates'),
labelNav: makeProp(PROP_TYPE_STRING, 'Calendar navigation'),
labelNextDecade: makeProp(PROP_TYPE_STRING, 'Next decade'),
labelNextMonth: makeProp(PROP_TYPE_STRING, 'Next month'),
labelNextYear: makeProp(PROP_TYPE_STRING, 'Next year'),
labelNoDateSelected: makeProp(PROP_TYPE_STRING, 'No date selected'),
labelPrevDecade: makeProp(PROP_TYPE_STRING, 'Previous decade'),
labelPrevMonth: makeProp(PROP_TYPE_STRING, 'Previous month'),
labelPrevYear: makeProp(PROP_TYPE_STRING, 'Previous year'),
labelSelected: makeProp(PROP_TYPE_STRING, 'Selected date'),
labelToday: makeProp(PROP_TYPE_STRING, 'Today'),
// Locale(s) to use
// Default is to use page/browser default setting
locale: makeProp(PROP_TYPE_ARRAY_STRING),
max: makeProp(PROP_TYPE_DATE_STRING),
min: makeProp(PROP_TYPE_DATE_STRING),
// Variant color to use for the navigation buttons
navButtonVariant: makeProp(PROP_TYPE_STRING, 'secondary'),
// Disable highlighting today's date
noHighlightToday: makeProp(PROP_TYPE_BOOLEAN, false),
noKeyNav: makeProp(PROP_TYPE_BOOLEAN, false),
readonly: makeProp(PROP_TYPE_BOOLEAN, false),
roleDescription: makeProp(PROP_TYPE_STRING),
// Variant color to use for the selected date
selectedVariant: makeProp(PROP_TYPE_STRING, 'primary'),
// When `true` enables the decade navigation buttons
showDecadeNav: makeProp(PROP_TYPE_BOOLEAN, false),
// Day of week to start calendar on
// `0` (Sunday), `1` (Monday), ... `6` (Saturday)
startWeekday: makeProp(PROP_TYPE_NUMBER_STRING, 0),
// Variant color to use for today's date (defaults to `selectedVariant`)
todayVariant: makeProp(PROP_TYPE_STRING),
// Always return the `v-model` value as a date object
valueAsDate: makeProp(PROP_TYPE_BOOLEAN, false),
// Format of the weekday names at the top of the calendar
// `short` is typically a 3 letter abbreviation,
// `narrow` is typically a single letter
// `long` is the full week day name
// Although some locales may override this (i.e `ar`, etc.)
weekdayHeaderFormat: makeProp(PROP_TYPE_STRING, CALENDAR_SHORT, value => {
return arrayIncludes([CALENDAR_LONG, CALENDAR_SHORT, CALENDAR_NARROW], value)
}),
// Has no effect if prop `block` is set
width: makeProp(PROP_TYPE_STRING, '270px')
}),
NAME_CALENDAR
)
// --- Main component ---
// @vue/component
export const BCalendar = Vue.extend({
name: NAME_CALENDAR,
// Mixin order is important!
mixins: [attrsMixin, idMixin, modelMixin, normalizeSlotMixin],
props,
data() {
const selected = formatYMD(this[MODEL_PROP_NAME]) || ''
return {
// Selected date
selectedYMD: selected,
// Date in calendar grid that has `tabindex` of `0`
activeYMD:
selected ||
formatYMD(constrainDate(this.initialDate || this.getToday()), this.min, this.max),
// Will be true if the calendar grid has/contains focus
gridHasFocus: false,
// Flag to enable the `aria-live` region(s) after mount
// to prevent screen reader "outbursts" when mounting
isLive: false
}
},
computed: {
valueId() {
return this.safeId()
},
widgetId() {
return this.safeId('_calendar-wrapper_')
},
navId() {
return this.safeId('_calendar-nav_')
},
gridId() {
return this.safeId('_calendar-grid_')
},
gridCaptionId() {
return this.safeId('_calendar-grid-caption_')
},
gridHelpId() {
return this.safeId('_calendar-grid-help_')
},
activeId() {
return this.activeYMD ? this.safeId(`_cell-${this.activeYMD}_`) : null
},
// TODO: Use computed props to convert `YYYY-MM-DD` to `Date` object
selectedDate() {
// Selected as a `Date` object
return parseYMD(this.selectedYMD)
},
activeDate() {
// Active as a `Date` object
return parseYMD(this.activeYMD)
},
computedMin() {
return parseYMD(this.min)
},
computedMax() {
return parseYMD(this.max)
},
computedWeekStarts() {
// `startWeekday` is a prop (constrained to `0` through `6`)
return mathMax(toInteger(this.startWeekday, 0), 0) % 7
},
computedLocale() {
// Returns the resolved locale used by the calendar
return resolveLocale(concat(this.locale).filter(identity), CALENDAR_GREGORY)
},
computedDateDisabledFn() {
const { dateDisabledFn } = this
return hasPropFunction(dateDisabledFn) ? dateDisabledFn : () => false
},
// TODO: Change `dateInfoFn` to handle events and notes as well as classes
computedDateInfoFn() {
const { dateInfoFn } = this
return hasPropFunction(dateInfoFn) ? dateInfoFn : () => ({})
},
calendarLocale() {
// This locale enforces the gregorian calendar (for use in formatter functions)
// Needed because IE 11 resolves `ar-IR` as islamic-civil calendar
// and IE 11 (and some other browsers) do not support the `calendar` option
// And we currently only support the gregorian calendar
const fmt = new Intl.DateTimeFormat(this.computedLocale, { calendar: CALENDAR_GREGORY })
const calendar = fmt.resolvedOptions().calendar
let locale = fmt.resolvedOptions().locale
/* istanbul ignore if: mainly for IE 11 and a few other browsers, hard to test in JSDOM */
if (calendar !== CALENDAR_GREGORY) {
// Ensure the locale requests the gregorian calendar
// Mainly for IE 11, and currently we can't handle non-gregorian calendars
// TODO: Should we always return this value?
locale = locale.replace(/-u-.+$/i, '').concat('-u-ca-gregory')
}
return locale
},
calendarYear() {
return this.activeDate.getFullYear()
},
calendarMonth() {
return this.activeDate.getMonth()
},
calendarFirstDay() {
// We set the time for this date to 12pm to work around
// date formatting issues in Firefox and Safari
// See: https://github.com/bootstrap-vue/bootstrap-vue/issues/5818
return createDate(this.calendarYear, this.calendarMonth, 1, 12)
},
calendarDaysInMonth() {
// We create a new date as to not mutate the original
const date = createDate(this.calendarFirstDay)
date.setMonth(date.getMonth() + 1, 0)
return date.getDate()
},
computedVariant() {
return `btn-${this.selectedVariant || 'primary'}`
},
computedTodayVariant() {
return `btn-outline-${this.todayVariant || this.selectedVariant || 'primary'}`
},
computedNavButtonVariant() {
return `btn-outline-${this.navButtonVariant || 'primary'}`
},
isRTL() {
// `true` if the language requested is RTL
const dir = toString(this.direction).toLowerCase()
if (dir === 'rtl') {
/* istanbul ignore next */
return true
} else if (dir === 'ltr') {
/* istanbul ignore next */
return false
}
return isLocaleRTL(this.computedLocale)
},
context() {
const { selectedYMD, activeYMD } = this
const selectedDate = parseYMD(selectedYMD)
const activeDate = parseYMD(activeYMD)
return {
// The current value of the `v-model`
selectedYMD,
selectedDate,
selectedFormatted: selectedDate
? this.formatDateString(selectedDate)
: this.labelNoDateSelected,
// Which date cell is considered active due to navigation
activeYMD,
activeDate,
activeFormatted: activeDate ? this.formatDateString(activeDate) : '',
// `true` if the date is disabled (when using keyboard navigation)
disabled: this.dateDisabled(activeDate),
// Locales used in formatting dates
locale: this.computedLocale,
calendarLocale: this.calendarLocale,
rtl: this.isRTL
}
},
// Computed props that return a function reference
dateOutOfRange() {
// Check whether a date is within the min/max range
// Returns a new function ref if the pops change
// We do this as we need to trigger the calendar computed prop
// to update when these props update
const { computedMin: min, computedMax: max } = this
return date => {
// Handle both `YYYY-MM-DD` and `Date` objects
date = parseYMD(date)
return (min && date < min) || (max && date > max)
}
},
dateDisabled() {
// Returns a function for validating if a date is within range
// We grab this variables first to ensure a new function ref
// is generated when the props value changes
// We do this as we need to trigger the calendar computed prop
// to update when these props update
const rangeFn = this.dateOutOfRange
// Return the function ref
return date => {
// Handle both `YYYY-MM-DD` and `Date` objects
date = parseYMD(date)
const ymd = formatYMD(date)
return !!(rangeFn(date) || this.computedDateDisabledFn(ymd, date))
}
},
// Computed props that return date formatter functions
formatDateString() {
// Returns a date formatter function
return createDateFormatter(this.calendarLocale, {
// Ensure we have year, month, day shown for screen readers/ARIA
// If users really want to leave one of these out, they can
// pass `undefined` for the property value
year: DATE_FORMAT_NUMERIC,
month: DATE_FORMAT_2_DIGIT,
day: DATE_FORMAT_2_DIGIT,
// Merge in user supplied options
...this.dateFormatOptions,
// Ensure hours/minutes/seconds are not shown
// As we do not support the time portion (yet)
hour: undefined,
minute: undefined,
second: undefined,
// Ensure calendar is gregorian
calendar: CALENDAR_GREGORY
})
},
formatYearMonth() {
// Returns a date formatter function
return createDateFormatter(this.calendarLocale, {
year: DATE_FORMAT_NUMERIC,
month: CALENDAR_LONG,
calendar: CALENDAR_GREGORY
})
},
formatWeekdayName() {
// Long weekday name for weekday header aria-label
return createDateFormatter(this.calendarLocale, {
weekday: CALENDAR_LONG,
calendar: CALENDAR_GREGORY
})
},
formatWeekdayNameShort() {
// Weekday header cell format
// defaults to 'short' 3 letter days, where possible
return createDateFormatter(this.calendarLocale, {
weekday: this.weekdayHeaderFormat || CALENDAR_SHORT,
calendar: CALENDAR_GREGORY
})
},
formatDay() {
// Calendar grid day number formatter
// We don't use DateTimeFormatter here as it can place extra
// character(s) after the number (i.e the `zh` locale)
const nf = new Intl.NumberFormat([this.computedLocale], {
style: 'decimal',
minimumIntegerDigits: 1,
minimumFractionDigits: 0,
maximumFractionDigits: 0,
notation: 'standard'
})
// Return a formatter function instance
return date => nf.format(date.getDate())
},
// Disabled states for the nav buttons
prevDecadeDisabled() {
const min = this.computedMin
return this.disabled || (min && lastDateOfMonth(oneDecadeAgo(this.activeDate)) < min)
},
prevYearDisabled() {
const min = this.computedMin
return this.disabled || (min && lastDateOfMonth(oneYearAgo(this.activeDate)) < min)
},
prevMonthDisabled() {
const min = this.computedMin
return this.disabled || (min && lastDateOfMonth(oneMonthAgo(this.activeDate)) < min)
},
thisMonthDisabled() {
// TODO: We could/should check if today is out of range
return this.disabled
},
nextMonthDisabled() {
const max = this.computedMax
return this.disabled || (max && firstDateOfMonth(oneMonthAhead(this.activeDate)) > max)
},
nextYearDisabled() {
const max = this.computedMax
return this.disabled || (max && firstDateOfMonth(oneYearAhead(this.activeDate)) > max)
},
nextDecadeDisabled() {
const max = this.computedMax
return this.disabled || (max && firstDateOfMonth(oneDecadeAhead(this.activeDate)) > max)
},
// Calendar dates generation
calendar() {
const matrix = []
const firstDay = this.calendarFirstDay
const calendarYear = firstDay.getFullYear()
const calendarMonth = firstDay.getMonth()
const daysInMonth = this.calendarDaysInMonth
const startIndex = firstDay.getDay() // `0`..`6`
const weekOffset = (this.computedWeekStarts > startIndex ? 7 : 0) - this.computedWeekStarts
// Build the calendar matrix
let currentDay = 0 - weekOffset - startIndex
for (let week = 0; week < 6 && currentDay < daysInMonth; week++) {
// For each week
matrix[week] = []
// The following could be a map function
for (let j = 0; j < 7; j++) {
// For each day in week
currentDay++
const date = createDate(calendarYear, calendarMonth, currentDay)
const month = date.getMonth()
const dayYMD = formatYMD(date)
const dayDisabled = this.dateDisabled(date)
// TODO: This could be a normalizer method
let dateInfo = this.computedDateInfoFn(dayYMD, parseYMD(dayYMD))
dateInfo =
isString(dateInfo) || isArray(dateInfo)
? /* istanbul ignore next */ { class: dateInfo }
: isPlainObject(dateInfo)
? { class: '', ...dateInfo }
: /* istanbul ignore next */ { class: '' }
matrix[week].push({
ymd: dayYMD,
// Cell content
day: this.formatDay(date),
label: this.formatDateString(date),
// Flags for styling
isThisMonth: month === calendarMonth,
isDisabled: dayDisabled,
// TODO: Handle other dateInfo properties such as notes/events
info: dateInfo
})
}
}
return matrix
},
calendarHeadings() {
return this.calendar[0].map(d => {
return {
text: this.formatWeekdayNameShort(parseYMD(d.ymd)),
label: this.formatWeekdayName(parseYMD(d.ymd))
}
})
}
},
watch: {
[MODEL_PROP_NAME](newValue, oldValue) {
const selected = formatYMD(newValue) || ''
const old = formatYMD(oldValue) || ''
if (!datesEqual(selected, old)) {
this.activeYMD = selected || this.activeYMD
this.selectedYMD = selected
}
},
selectedYMD(newYMD, oldYMD) {
// TODO:
// Should we compare to `formatYMD(this.value)` and emit
// only if they are different?
if (newYMD !== oldYMD) {
this.$emit(MODEL_EVENT_NAME, this.valueAsDate ? parseYMD(newYMD) || null : newYMD || '')
}
},
context(newValue, oldValue) {
if (!looseEqual(newValue, oldValue)) {
this.$emit(EVENT_NAME_CONTEXT, newValue)
}
},
hidden(newValue) {
// Reset the active focused day when hidden
this.activeYMD =
this.selectedYMD ||
formatYMD(this[MODEL_PROP_NAME] || this.constrainDate(this.initialDate || this.getToday()))
// Enable/disable the live regions
this.setLive(!newValue)
}
},
created() {
this.$nextTick(() => {
this.$emit(EVENT_NAME_CONTEXT, this.context)
})
},
mounted() {
this.setLive(true)
},
/* istanbul ignore next */
activated() {
this.setLive(true)
},
/* istanbul ignore next */
deactivated() {
this.setLive(false)
},
beforeDestroy() {
this.setLive(false)
},
methods: {
// Public method(s)
focus() {
if (!this.disabled) {
attemptFocus(this.$refs.grid)
}
},
blur() {
if (!this.disabled) {
attemptBlur(this.$refs.grid)
}
},
// Private methods
setLive(on) {
if (on) {
this.$nextTick(() => {
requestAF(() => {
this.isLive = true
})
})
} else {
this.isLive = false
}
},
getToday() {
return parseYMD(createDate())
},
constrainDate(date) {
// Constrains a date between min and max
// returns a new `Date` object instance
return constrainDate(date, this.computedMin, this.computedMax)
},
emitSelected(date) {
// Performed in a `$nextTick()` to (probably) ensure
// the input event has emitted first
this.$nextTick(() => {
this.$emit(EVENT_NAME_SELECTED, formatYMD(date) || '', parseYMD(date) || null)
})
},
// Event handlers
setGridFocusFlag(event) {
// Sets the gridHasFocus flag to make date "button" look focused
this.gridHasFocus = !this.disabled && event.type === 'focus'
},
onKeydownWrapper(event) {
// Calendar keyboard navigation
// Handles PAGEUP/PAGEDOWN/END/HOME/LEFT/UP/RIGHT/DOWN
// Focuses grid after updating
if (this.noKeyNav) {
/* istanbul ignore next */
return
}
const { altKey, ctrlKey, keyCode } = event
if (
!arrayIncludes(
[
CODE_PAGEUP,
CODE_PAGEDOWN,
CODE_END,
CODE_HOME,
CODE_LEFT,
CODE_UP,
CODE_RIGHT,
CODE_DOWN
],
keyCode
)
) {
/* istanbul ignore next */
return
}
stopEvent(event)
let activeDate = createDate(this.activeDate)
let checkDate = createDate(this.activeDate)
const day = activeDate.getDate()
const constrainedToday = this.constrainDate(this.getToday())
const isRTL = this.isRTL
if (keyCode === CODE_PAGEUP) {
// PAGEUP - Previous month/year
activeDate = (altKey ? (ctrlKey ? oneDecadeAgo : oneYearAgo) : oneMonthAgo)(activeDate)
// We check the first day of month to be in rage
checkDate = createDate(activeDate)
checkDate.setDate(1)
} else if (keyCode === CODE_PAGEDOWN) {
// PAGEDOWN - Next month/year
activeDate = (altKey ? (ctrlKey ? oneDecadeAhead : oneYearAhead) : oneMonthAhead)(
activeDate
)
// We check the last day of month to be in rage
checkDate = createDate(activeDate)
checkDate.setMonth(checkDate.getMonth() + 1)
checkDate.setDate(0)
} else if (keyCode === CODE_LEFT) {
// LEFT - Previous day (or next day for RTL)
activeDate.setDate(day + (isRTL ? 1 : -1))
activeDate = this.constrainDate(activeDate)
checkDate = activeDate
} else if (keyCode === CODE_RIGHT) {
// RIGHT - Next day (or previous day for RTL)
activeDate.setDate(day + (isRTL ? -1 : 1))
activeDate = this.constrainDate(activeDate)
checkDate = activeDate
} else if (keyCode === CODE_UP) {
// UP - Previous week
activeDate.setDate(day - 7)
activeDate = this.constrainDate(activeDate)
checkDate = activeDate
} else if (keyCode === CODE_DOWN) {
// DOWN - Next week
activeDate.setDate(day + 7)
activeDate = this.constrainDate(activeDate)
checkDate = activeDate
} else if (keyCode === CODE_HOME) {
// HOME - Today
activeDate = constrainedToday
checkDate = activeDate
} else if (keyCode === CODE_END) {
// END - Selected date, or today if no selected date
activeDate = parseYMD(this.selectedDate) || constrainedToday
checkDate = activeDate
}
if (!this.dateOutOfRange(checkDate) && !datesEqual(activeDate, this.activeDate)) {
// We only jump to date if within min/max
// We don't check for individual disabled dates though (via user function)
this.activeYMD = formatYMD(activeDate)
}
// Ensure grid is focused
this.focus()
},
onKeydownGrid(event) {
// Pressing enter/space on grid to select active date
const keyCode = event.keyCode
const activeDate = this.activeDate
if (keyCode === CODE_ENTER || keyCode === CODE_SPACE) {
stopEvent(event)
if (!this.disabled && !this.readonly && !this.dateDisabled(activeDate)) {
this.selectedYMD = formatYMD(activeDate)
this.emitSelected(activeDate)
}
// Ensure grid is focused
this.focus()
}
},
onClickDay(day) {
// Clicking on a date "button" to select it
const { selectedDate, activeDate } = this
const clickedDate = parseYMD(day.ymd)
if (!this.disabled && !day.isDisabled && !this.dateDisabled(clickedDate)) {
if (!this.readonly) {
// If readonly mode, we don't set the selected date, just the active date
// If the clicked date is equal to the already selected date, we don't update the model
this.selectedYMD = formatYMD(
datesEqual(clickedDate, selectedDate) ? selectedDate : clickedDate
)
this.emitSelected(clickedDate)
}
this.activeYMD = formatYMD(
datesEqual(clickedDate, activeDate) ? activeDate : createDate(clickedDate)
)
// Ensure grid is focused
this.focus()
}
},
gotoPrevDecade() {
this.activeYMD = formatYMD(this.constrainDate(oneDecadeAgo(this.activeDate)))
},
gotoPrevYear() {
this.activeYMD = formatYMD(this.constrainDate(oneYearAgo(this.activeDate)))
},
gotoPrevMonth() {
this.activeYMD = formatYMD(this.constrainDate(oneMonthAgo(this.activeDate)))
},
gotoCurrentMonth() {
// TODO: Maybe this goto date should be configurable?
this.activeYMD = formatYMD(this.constrainDate(this.getToday()))
},
gotoNextMonth() {
this.activeYMD = formatYMD(this.constrainDate(oneMonthAhead(this.activeDate)))
},
gotoNextYear() {
this.activeYMD = formatYMD(this.constrainDate(oneYearAhead(this.activeDate)))
},
gotoNextDecade() {
this.activeYMD = formatYMD(this.constrainDate(oneDecadeAhead(this.activeDate)))
},
onHeaderClick() {
if (!this.disabled) {
this.activeYMD = this.selectedYMD || formatYMD(this.getToday())
this.focus()
}
}
},
render(h) {
// If `hidden` prop is set, render just a placeholder node
if (this.hidden) {
return h()
}
const {
valueId,
widgetId,
navId,
gridId,
gridCaptionId,
gridHelpId,
activeId,
disabled,
noKeyNav,
isLive,
isRTL,
activeYMD,
selectedYMD,
safeId
} = this
const hideDecadeNav = !this.showDecadeNav
const todayYMD = formatYMD(this.getToday())
const highlightToday = !this.noHighlightToday
// Header showing current selected date
let $header = h(
'output',
{
staticClass: 'form-control form-control-sm text-center',
class: { 'text-muted': disabled, readonly: this.readonly || disabled },
attrs: {
id: valueId,
for: gridId,
role: 'status',
tabindex: disabled ? null : '-1',
// Mainly for testing purposes, as we do not know
// the exact format `Intl` will format the date string
'data-selected': toString(selectedYMD),
// We wait until after mount to enable `aria-live`
// to prevent initial announcement on page render
'aria-live': isLive ? 'polite' : 'off',
'aria-atomic': isLive ? 'true' : null
},
on: {
// Transfer focus/click to focus grid
// and focus active date (or today if no selection)
click: this.onHeaderClick,
focus: this.onHeaderClick
}
},
this.selectedDate
? [
// We use `bdi` elements here in case the label doesn't match the locale
// Although IE 11 does not deal with <BDI> at all (equivalent to a span)
h('bdi', { staticClass: 'sr-only' }, ` (${toString(this.labelSelected)}) `),
h('bdi', this.formatDateString(this.selectedDate))
]
: this.labelNoDateSelected || '\u00a0' // ' '
)
$header = h(
'header',
{
staticClass: 'b-calendar-header',
class: { 'sr-only': this.hideHeader },
attrs: { title: this.selectedDate ? this.labelSelectedDate || null : null }
},
[$header]
)
// Content for the date navigation buttons
const navScope = { isRTL }
const navProps = { shiftV: 0.5 }
const navPrevProps = { ...navProps, flipH: isRTL }
const navNextProps = { ...navProps, flipH: !isRTL }
const $prevDecadeIcon =
this.normalizeSlot(SLOT_NAME_NAV_PEV_DECADE, navScope) ||
h(BIconChevronBarLeft, { props: navPrevProps })
const $prevYearIcon =
this.normalizeSlot(SLOT_NAME_NAV_PEV_YEAR, navScope) ||
h(BIconChevronDoubleLeft, { props: navPrevProps })
const $prevMonthIcon =
this.normalizeSlot(SLOT_NAME_NAV_PEV_MONTH, navScope) ||
h(BIconChevronLeft, { props: navPrevProps })
const $thisMonthIcon =
this.normalizeSlot(SLOT_NAME_NAV_THIS_MONTH, navScope) ||
h(BIconCircleFill, { props: navProps })
const $nextMonthIcon =
this.normalizeSlot(SLOT_NAME_NAV_NEXT_MONTH, navScope) ||
h(BIconChevronLeft, { props: navNextProps })
const $nextYearIcon =
this.normalizeSlot(SLOT_NAME_NAV_NEXT_YEAR, navScope) ||
h(BIconChevronDoubleLeft, { props: navNextProps })
const $nextDecadeIcon =
this.normalizeSlot(SLOT_NAME_NAV_NEXT_DECADE, navScope) ||
h(BIconChevronBarLeft, { props: navNextProps })
// Utility to create the date navigation buttons
const makeNavBtn = (content, label, handler, btnDisabled, shortcut) => {
return h(
'button',
{
staticClass: 'btn btn-sm border-0 flex-fill',
class: [this.computedNavButtonVariant, { disabled: btnDisabled }],
attrs: {
title: label || null,
type: 'button',
tabindex: noKeyNav ? '-1' : null,
'aria-label': label || null,
'aria-disabled': btnDisabled ? 'true' : null,
'aria-keyshortcuts': shortcut || null
},
on: btnDisabled ? {} : { click: handler }
},
[h('div', { attrs: { 'aria-hidden': 'true' } }, [content])]
)
}
// Generate the date navigation buttons
const $nav = h(
'div',
{
staticClass: 'b-calendar-nav d-flex',
attrs: {
id: navId,
role: 'group',
tabindex: noKeyNav ? '-1' : null,
'aria-hidden': disabled ? 'true' : null,
'aria-label': this.labelNav || null,
'aria-controls': gridId
}
},
[
hideDecadeNav
? h()
: makeNavBtn(
$prevDecadeIcon,
this.labelPrevDecade,
this.gotoPrevDecade,
this.prevDecadeDisabled,
'Ctrl+Alt+PageDown'
),
makeNavBtn(
$prevYearIcon,
this.labelPrevYear,
this.gotoPrevYear,
this.prevYearDisabled,
'Alt+PageDown'
),
makeNavBtn(
$prevMonthIcon,
this.labelPrevMonth,
this.gotoPrevMonth,
this.prevMonthDisabled,
'PageDown'
),
makeNavBtn(
$thisMonthIcon,
this.labelCurrentMonth,
this.gotoCurrentMonth,
this.thisMonthDisabled,
'Home'
),
makeNavBtn(
$nextMonthIcon,
this.labelNextMonth,
this.gotoNextMonth,
this.nextMonthDisabled,
'PageUp'
),
makeNavBtn(
$nextYearIcon,
this.labelNextYear,
this.gotoNextYear,
this.nextYearDisabled,
'Alt+PageUp'
),
hideDecadeNav
? h()
: makeNavBtn(
$nextDecadeIcon,
this.labelNextDecade,
this.gotoNextDecade,
this.nextDecadeDisabled,
'Ctrl+Alt+PageUp'
)
]
)
// Caption for calendar grid
const $gridCaption = h(
'header',
{
staticClass: 'b-calendar-grid-caption text-center font-weight-bold',
class: { 'text-muted': disabled },
attrs: {
id: gridCaptionId,
'aria-live': isLive ? 'polite' : null,
'aria-atomic': isLive ? 'true' : null
},
key: 'grid-caption'
},
this.formatYearMonth(this.calendarFirstDay)
)
// Calendar weekday headings
const $gridWeekDays = h(
'div',
{
staticClass: 'b-calendar-grid-weekdays row no-gutters border-bottom',
attrs: { 'aria-hidden': 'true' }
},
this.calendarHeadings.map((d, idx) => {
return h(
'small',
{
staticClass: 'col text-truncate',
class: { 'text-muted': disabled },
attrs: {
title: d.label === d.text ? null : d.label,
'aria-label': d.label
},
key: idx
},
d.text
)
})
)
// Calendar day grid
let $gridBody = this.calendar.map(week => {
const $cells = week.map((day, dIndex) => {
const isSelected = day.ymd === selectedYMD
const isActive = day.ymd === activeYMD
const isToday = day.ymd === todayYMD
const idCell = safeId(`_cell-${day.ymd}_`)
// "fake" button
const $btn = h(
'span',
{
staticClass: 'btn border-0 rounded-circle text-nowrap',
// Should we add some classes to signify if today/selected/etc?
class: {
// Give the fake button a focus ring
focus: isActive && this.gridHasFocus,
// Styling
disabled: day.isDisabled || disabled,
active: isSelected, // makes the button look "pressed"
// Selected date style (need to computed from variant)
[this.computedVariant]: isSelected,
// Today day style (if not selected), same variant color as selected date
[this.computedTodayVariant]:
isToday && highlightToday && !isSelected && day.isThisMonth,
// Non selected/today styling
'btn-outline-light': !(isToday && highlightToday) && !isSelected && !isActive,
'btn-light': !(isToday && highlightToday) && !isSelected && isActive,
// Text styling
'text-muted': !day.isThisMonth && !isSelected,
'text-dark':
!(isToday && highlightToday) && !isSelected && !isActive && day.isThisMonth,
'font-weight-bold': (isSelected || day.isThisMonth) && !day.isDisabled
},
on: { click: () => this.onClickDay(day) }
},
day.day
)
return h(
'div', // Cell with button
{
staticClass: 'col p-0',
class: day.isDisabled ? 'bg-light' : day.info.class || '',
attrs: {
id: idCell,
role: 'button',
'data-date': day.ymd, // Primarily for testing purposes
// Only days in the month are presented as buttons to screen readers
'aria-hidden': day.isThisMonth ? null : 'true',
'aria-disabled': day.isDisabled || disabled ? 'true' : null,
'aria-label': [
day.label,
isSelected ? `(${this.labelSelected})` : null,
isToday ? `(${this.labelToday})` : null
]
.filter(identity)
.join(' '),
// NVDA doesn't convey `aria-selected`, but does `aria-current`,
// ChromeVox doesn't convey `aria-current`, but does `aria-selected`,
// so we set both attributes for robustness
'aria-selected': isSelected ? 'true' : null,
'aria-current': isSelected ? 'date' : null
},
key: dIndex
},
[$btn]
)
})
// Return the week "row"
// We use the first day of the weeks YMD value as a
// key for efficient DOM patching / element re-use
return h(
'div',
{
staticClass: 'row no-gutters',
key: week[0].ymd
},
$cells
)
})
$gridBody = h(
'div',
{
// A key is only required on the body if we add in transition support
staticClass: 'b-calendar-grid-body',
style: disabled ? { pointerEvents: 'none' } : {}
// key: this.activeYMD.slice(0, -3)
},
$gridBody
)
const $gridHelp = h(
'footer',
{
staticClass: 'b-calendar-grid-help border-top small text-muted text-center bg-light',
attrs: {
id: gridHelpId
}
},
[h('div', { staticClass: 'small' }, this.labelHelp)]
)
const $grid = h(
'div',
{
staticClass: 'b-calendar-grid form-control h-auto text-center',
attrs: {
id: gridId,
role: 'application',
tabindex: noKeyNav ? '-1' : disabled ? null : '0',
'data-month': activeYMD.slice(0, -3), // `YYYY-MM`, mainly for testing
'aria-roledescription': this.labelCalendar || null,
'aria-labelledby': gridCaptionId,
'aria-describedby': gridHelpId,
// `aria-readonly` is not considered valid on `role="application"`
// https://www.w3.org/TR/wai-aria-1.1/#aria-readonly
// 'aria-readonly': this.readonly && !disabled ? 'true' : null,
'aria-disabled': disabled ? 'true' : null,
'aria-activedescendant': activeId
},
on: {
keydown: this.onKeydownGrid,
focus: this.setGridFocusFlag,
blur: this.setGridFocusFlag
},
ref: 'grid'
},
[$gridCaption, $gridWeekDays, $gridBody, $gridHelp]
)
// Optional bottom slot
let $slot = this.normalizeSlot()
$slot = $slot ? h('footer', { staticClass: 'b-calendar-footer' }, $slot) : h()
const $widget = h(
'div',
{
staticClass: 'b-calendar-inner',
style: this.block ? {} : { width: this.width },
attrs: {
id: widgetId,
dir: isRTL ? 'rtl' : 'ltr',
lang: this.computedLocale || null,
role: 'group',
'aria-disabled': disabled ? 'true' : null,
// If datepicker controls an input, this will specify the ID of the input
'aria-controls': this.ariaControls || null,
// This should be a prop (so it can be changed to Date picker, etc, localized
'aria-roledescription': this.roleDescription || null,
'aria-describedby': [
// Should the attr (if present) go last?
// Or should this attr be a prop?
this.bvAttrs['aria-describedby'],
valueId,
gridHelpId
]
.filter(identity)
.join(' ')
},
on: {
keydown: this.onKeydownWrapper
}
},
[$header, $nav, $grid, $slot]
)
// Wrap in an outer div that can be styled
return h('div', { staticClass: 'b-calendar', class: { 'd-block': this.block } }, [$widget])
}
})