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* Copyright 2020 Adobe. All rights reserved.\n * This file is licensed to you under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License. You may obtain a copy\n * of the License at http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software distributed under\n * the License is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS\n * OF ANY KIND, either express or implied. See the License for the specific language\n * governing permissions and limitations under the License.\n */\n\nimport {\n alignCenter,\n alignEnd,\n alignStart,\n constrainStart,\n constrainValue,\n isEqualDuration,\n isInvalid,\n previousAvailableDate\n} from './utils';\nimport {\n Calendar,\n CalendarDate,\n CalendarIdentifier,\n DateDuration,\n DateFormatter,\n endOfMonth,\n endOfWeek,\n getDayOfWeek,\n getWeeksInMonth,\n GregorianCalendar,\n isEqualCalendar,\n isSameDay,\n startOfMonth,\n startOfWeek,\n toCalendar,\n toCalendarDate,\n today\n} from '@internationalized/date';\nimport {\n CalendarPropsBase,\n CalendarSelectionMode,\n CalendarState,\n CalendarValueType,\n DateValue,\n MappedDateValue\n} from './types';\nimport {useControlledState} from '../utils/useControlledState';\nimport {useMemo, useState} from 'react';\nimport {ValidationState, ValueBase} from '@react-types/shared';\n\nexport interface CalendarProps<T extends DateValue, M extends CalendarSelectionMode = 'single'>\n extends\n CalendarPropsBase,\n ValueBase<CalendarValueType<T | null, M>, CalendarValueType<MappedDateValue<T>, M>> {\n /**\n * Whether single or multiple selection is enabled.\n *\n * @default 'single'\n */\n selectionMode?: M;\n /**\n * Callback that is called for each date of the calendar. If it returns true, then the date is\n * unavailable.\n */\n isDateUnavailable?: (date: DateValue) => boolean;\n}\n\nexport interface CalendarStateOptions<\n T extends DateValue = DateValue,\n M extends CalendarSelectionMode = 'single'\n> extends CalendarProps<T, M> {\n /** The locale to display and edit the value according to. */\n locale: string;\n /**\n * A function that creates a [Calendar](../internationalized/date/Calendar.html)\n * object for a given calendar identifier. Such a function may be imported from the\n * `@internationalized/date` package, or manually implemented to include support for\n * only certain calendars.\n */\n createCalendar: (name: CalendarIdentifier) => Calendar;\n /**\n * The amount of days that will be displayed at once. This affects how pagination works.\n *\n * @default { months: 1 }\n */\n visibleDuration?: DateDuration;\n /**\n * Determines the alignment of the visible months on initial render based on the current selection\n * or current date if there is no selection.\n *\n * @default 'center'\n */\n selectionAlignment?: 'start' | 'center' | 'end';\n}\n/**\n * Provides state management for a calendar component.\n * A calendar displays one or more date grids and allows users to select a single date.\n */\nexport function useCalendarState<\n T extends DateValue = DateValue,\n M extends CalendarSelectionMode = 'single'\n>(props: CalendarStateOptions<T, M>): CalendarState<M> {\n let defaultFormatter = useMemo(() => new DateFormatter(props.locale), [props.locale]);\n let resolvedOptions = useMemo(() => defaultFormatter.resolvedOptions(), [defaultFormatter]);\n let {\n locale,\n createCalendar,\n visibleDuration = {months: 1},\n minValue,\n maxValue,\n selectionAlignment,\n isDateUnavailable,\n pageBehavior = 'visible',\n selectionMode = 'single' as M,\n firstDayOfWeek,\n weeksInMonth\n } = props;\n let calendar = useMemo(\n () => createCalendar(resolvedOptions.calendar as CalendarIdentifier),\n [createCalendar, resolvedOptions.calendar]\n );\n\n let [value, setControlledValue] = useControlledState<\n T | T[] | null,\n MappedDateValue<T> | MappedDateValue<T>[] | null\n >(props.value as any, (props.defaultValue as any) ?? null, props.onChange as any);\n let calendarDateValue = useMemo(() => {\n if (Array.isArray(value)) {\n return value.map(value => toCalendar(toCalendarDate(value), calendar));\n } else {\n return value ? toCalendar(toCalendarDate(value), calendar) : null;\n }\n }, [value, calendar]);\n let timeZone = useMemo(() => {\n let val = Array.isArray(value) ? value[0] : value;\n return val && 'timeZone' in val ? val.timeZone : resolvedOptions.timeZone;\n }, [value, resolvedOptions.timeZone]);\n let focusedCalendarDate = useMemo(\n () =>\n props.focusedValue\n ? constrainValue(\n toCalendar(toCalendarDate(props.focusedValue), calendar),\n minValue,\n maxValue\n )\n : undefined,\n [props.focusedValue, calendar, minValue, maxValue]\n );\n let defaultFocusedCalendarDate = useMemo(() => {\n if (props.defaultFocusedValue) {\n return constrainValue(\n toCalendar(toCalendarDate(props.defaultFocusedValue), calendar),\n minValue,\n maxValue\n );\n }\n\n if (calendarDateValue) {\n return constrainValue(\n Array.isArray(calendarDateValue) ? calendarDateValue[0] : calendarDateValue,\n minValue,\n maxValue\n );\n }\n\n return constrainValue(toCalendar(today(timeZone), calendar), minValue, maxValue);\n }, [props.defaultFocusedValue, calendarDateValue, timeZone, calendar, minValue, maxValue]);\n let [focusedDate, setFocusedDate] = useControlledState(\n focusedCalendarDate,\n defaultFocusedCalendarDate,\n props.onFocusChange\n );\n let getStartDate = () => {\n switch (selectionAlignment) {\n case 'start':\n return alignStart(focusedDate, visibleDuration, locale, minValue, maxValue);\n case 'end':\n return alignEnd(focusedDate, visibleDuration, locale, minValue, maxValue);\n case 'center':\n default:\n return alignCenter(focusedDate, visibleDuration, locale, minValue, maxValue);\n }\n };\n\n let [startDate, setStartDate] = useState(getStartDate);\n let [isFocused, setFocused] = useState(props.autoFocus || false);\n\n let [lastVisibleDuration, setLastVisibleDuration] = useState(visibleDuration);\n if (!isEqualDuration(visibleDuration, lastVisibleDuration)) {\n setLastVisibleDuration(visibleDuration);\n setStartDate(getStartDate());\n }\n\n let endDate = useMemo(() => {\n let duration = {...visibleDuration};\n if (duration.days) {\n duration.days--;\n } else {\n duration.days = -1;\n }\n return startDate.add(duration);\n }, [startDate, visibleDuration]);\n\n // Reset focused date and visible range when calendar changes.\n let [lastCalendar, setLastCalendar] = useState(calendar);\n if (!isEqualCalendar(calendar, lastCalendar)) {\n let newFocusedDate = toCalendar(focusedDate, calendar);\n setStartDate(alignCenter(newFocusedDate, visibleDuration, locale, minValue, maxValue));\n setFocusedDate(newFocusedDate);\n setLastCalendar(calendar);\n }\n\n if (isInvalid(focusedDate, minValue, maxValue)) {\n // If the focused date was moved to an invalid value, it can't be focused, so constrain it.\n setFocusedDate(constrainValue(focusedDate, minValue, maxValue));\n } else if (focusedDate.compare(startDate) < 0) {\n setStartDate(alignEnd(focusedDate, visibleDuration, locale, minValue, maxValue));\n } else if (focusedDate.compare(endDate) > 0) {\n setStartDate(alignStart(focusedDate, visibleDuration, locale, minValue, maxValue));\n }\n\n // Sets focus to a specific cell date\n function focusCell(date: CalendarDate) {\n date = constrainValue(date, minValue, maxValue);\n setFocusedDate(date);\n }\n\n function normalizeValue(newValue: CalendarDate) {\n let constrained = constrainValue(newValue, minValue, maxValue);\n let prev = previousAvailableDate(constrained, startDate, isDateUnavailable);\n if (!prev) {\n return null;\n }\n\n // The display calendar should not have any effect on the emitted value.\n // Emit dates in the same calendar as the original value, if any, otherwise gregorian.\n let baseValue = Array.isArray(value) ? value[0] : value;\n let calendarValue = toCalendar(prev, baseValue?.calendar || new GregorianCalendar());\n\n // Preserve time if the input value had one.\n if (baseValue && 'hour' in baseValue) {\n return baseValue.set(calendarValue) as T;\n }\n\n return calendarValue as T;\n }\n\n function setValue(newValue: CalendarDate | CalendarDate[] | null) {\n if (!props.isDisabled && !props.isReadOnly) {\n if (newValue === null) {\n setControlledValue(selectionMode === 'multiple' ? [] : null);\n return;\n }\n\n if (Array.isArray(newValue)) {\n setControlledValue(newValue.map(normalizeValue).filter(Boolean) as any);\n } else {\n let localValue = normalizeValue(newValue);\n if (localValue) {\n setControlledValue(localValue as any);\n }\n }\n }\n }\n\n let isUnavailable = useMemo(() => {\n if (!calendarDateValue) {\n return false;\n }\n\n if (Array.isArray(calendarDateValue)) {\n return calendarDateValue.some(\n date => isDateUnavailable?.(date) || isInvalid(date, minValue, maxValue)\n );\n }\n\n return (\n isDateUnavailable?.(calendarDateValue) || isInvalid(calendarDateValue, minValue, maxValue)\n );\n }, [calendarDateValue, isDateUnavailable, minValue, maxValue]);\n let isValueInvalid = props.isInvalid || props.validationState === 'invalid' || isUnavailable;\n let validationState: ValidationState | null = isValueInvalid ? 'invalid' : null;\n\n let pageDuration = useMemo(() => {\n if (pageBehavior === 'visible') {\n return visibleDuration;\n }\n\n return unitDuration(visibleDuration);\n }, [pageBehavior, visibleDuration]);\n\n return {\n isDisabled: props.isDisabled ?? false,\n isReadOnly: props.isReadOnly ?? false,\n value: calendarDateValue as any,\n setValue: setValue as any,\n selectionMode,\n visibleDuration,\n visibleRange: {\n start: startDate,\n end: endDate\n },\n minValue,\n maxValue,\n focusedDate,\n timeZone,\n validationState,\n isValueInvalid,\n setFocusedDate(date) {\n focusCell(date);\n },\n focusNextDay() {\n focusCell(focusedDate.add({days: 1}));\n },\n focusPreviousDay() {\n focusCell(focusedDate.subtract({days: 1}));\n },\n focusNextRow() {\n if (visibleDuration.days) {\n this.focusNextPage();\n } else if (visibleDuration.weeks || visibleDuration.months || visibleDuration.years) {\n focusCell(focusedDate.add({weeks: 1}));\n }\n },\n focusPreviousRow() {\n if (visibleDuration.days) {\n this.focusPreviousPage();\n } else if (visibleDuration.weeks || visibleDuration.months || visibleDuration.years) {\n focusCell(focusedDate.subtract({weeks: 1}));\n }\n },\n focusNextPage() {\n let start = startDate.add(pageDuration);\n setFocusedDate(constrainValue(focusedDate.add(pageDuration), minValue, maxValue));\n setStartDate(\n alignStart(\n constrainStart(focusedDate, start, pageDuration, locale, minValue, maxValue),\n pageDuration,\n locale\n )\n );\n },\n focusPreviousPage() {\n let start = startDate.subtract(pageDuration);\n setFocusedDate(constrainValue(focusedDate.subtract(pageDuration), minValue, maxValue));\n setStartDate(\n alignStart(\n constrainStart(focusedDate, start, pageDuration, locale, minValue, maxValue),\n pageDuration,\n locale\n )\n );\n },\n focusSectionStart() {\n if (visibleDuration.days) {\n focusCell(startDate);\n } else if (visibleDuration.weeks) {\n focusCell(startOfWeek(focusedDate, locale));\n } else if (visibleDuration.months || visibleDuration.years) {\n focusCell(startOfMonth(focusedDate));\n }\n },\n focusSectionEnd() {\n if (visibleDuration.days) {\n focusCell(endDate);\n } else if (visibleDuration.weeks) {\n focusCell(endOfWeek(focusedDate, locale));\n } else if (visibleDuration.months || visibleDuration.years) {\n focusCell(endOfMonth(focusedDate));\n }\n },\n focusNextSection(larger) {\n if (!larger && !visibleDuration.days) {\n focusCell(focusedDate.add(unitDuration(visibleDuration)));\n return;\n }\n\n if (visibleDuration.days) {\n this.focusNextPage();\n } else if (visibleDuration.weeks) {\n focusCell(focusedDate.add({months: 1}));\n } else if (visibleDuration.months || visibleDuration.years) {\n focusCell(focusedDate.add({years: 1}));\n }\n },\n focusPreviousSection(larger) {\n if (!larger && !visibleDuration.days) {\n focusCell(focusedDate.subtract(unitDuration(visibleDuration)));\n return;\n }\n\n if (visibleDuration.days) {\n this.focusPreviousPage();\n } else if (visibleDuration.weeks) {\n focusCell(focusedDate.subtract({months: 1}));\n } else if (visibleDuration.months || visibleDuration.years) {\n focusCell(focusedDate.subtract({years: 1}));\n }\n },\n selectFocusedDate() {\n if (!(isDateUnavailable && isDateUnavailable(focusedDate))) {\n this.selectDate(focusedDate);\n }\n },\n selectDate(date) {\n if (props.isDisabled || props.isReadOnly) {\n return;\n }\n\n if (selectionMode === 'multiple' && date != null) {\n let newDate = normalizeValue(date);\n if (!newDate) {\n return;\n }\n\n let baseValue: T[] = [];\n if (Array.isArray(value)) {\n baseValue = value;\n } else if (value != null) {\n baseValue = [value];\n }\n\n let index = baseValue.findIndex(value => isSameDay(value, newDate));\n let newValue =\n index >= 0\n ? baseValue.slice(0, index).concat(baseValue.slice(index + 1))\n : [...baseValue, newDate];\n setControlledValue(newValue);\n } else {\n setValue(date);\n }\n },\n isFocused,\n setFocused,\n isInvalid(date) {\n return isInvalid(date, minValue, maxValue);\n },\n isSelected(date) {\n if (!calendarDateValue || this.isCellDisabled(date) || this.isCellUnavailable(date)) {\n return false;\n }\n return Array.isArray(calendarDateValue)\n ? calendarDateValue.some(value => isSameDay(value, date))\n : isSameDay(date, calendarDateValue);\n },\n isCellFocused(date) {\n return isFocused && focusedDate && isSameDay(date, focusedDate);\n },\n isCellDisabled(date) {\n return (\n props.isDisabled ||\n date.compare(startDate) < 0 ||\n date.compare(endDate) > 0 ||\n this.isInvalid(date)\n );\n },\n isCellUnavailable(date) {\n return props.isDateUnavailable ? props.isDateUnavailable(date) : false;\n },\n isPreviousVisibleRangeInvalid() {\n let prev = startDate.subtract({days: 1});\n return isSameDay(prev, startDate) || this.isInvalid(prev);\n },\n isNextVisibleRangeInvalid() {\n // Adding may return the same date if we reached the end of time\n // according to the calendar system (e.g. 9999-12-31).\n let next = endDate.add({days: 1});\n return isSameDay(next, endDate) || this.isInvalid(next);\n },\n getDatesInWeek(weekIndex, from = startDate) {\n let date = from.add({weeks: weekIndex});\n let dates: (CalendarDate | null)[] = [];\n\n let days = visibleDuration.days && visibleDuration.days < 7 ? visibleDuration.days : 7;\n if (days === 7) {\n date = startOfWeek(date, locale, firstDayOfWeek);\n\n // startOfWeek will clamp dates within the calendar system's valid range, which may\n // start in the middle of a week. In this case, add null placeholders.\n let dayOfWeek = getDayOfWeek(date, locale, firstDayOfWeek);\n for (let i = 0; i < dayOfWeek; i++) {\n dates.push(null);\n }\n }\n\n while (dates.length < days) {\n dates.push(date);\n let nextDate = date.add({days: 1});\n if (isSameDay(date, nextDate)) {\n // If the next day is the same, we have hit the end of the calendar system.\n break;\n }\n date = nextDate;\n }\n\n // Add null placeholders if at the end of the calendar system.\n while (dates.length < days) {\n dates.push(null);\n }\n\n return dates;\n },\n getWeeksInMonth(date = startDate) {\n let weeks = weeksInMonth || getWeeksInMonth(date, locale, firstDayOfWeek);\n if (visibleDuration.weeks || visibleDuration.days) {\n weeks = visibleDuration.weeks ?? 0;\n if (visibleDuration.days) {\n weeks += Math.ceil(visibleDuration.days / 7);\n }\n }\n return weeks;\n }\n };\n}\n\nfunction unitDuration(duration: DateDuration) {\n let unit = {...duration};\n for (let key in duration) {\n unit[key] = 1;\n }\n return unit;\n}\n"],"names":[],"version":3,"file":"useCalendarState.mjs.map"}