bc518174
 王天杨
提交两个项目文件
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import {
addDays,
addMonths,
addWeeks,
addYears,
endOfISOWeek,
endOfWeek,
max,
min,
startOfISOWeek,
startOfWeek
} from 'date-fns';
import { DayPickerContextValue } from 'contexts/DayPicker';
import { getActiveModifiers } from 'contexts/Modifiers';
import { Modifiers } from 'types/Modifiers';
export type MoveFocusBy =
| 'day'
| 'week'
| 'startOfWeek'
| 'endOfWeek'
| 'month'
| 'year';
export type MoveFocusDirection = 'after' | 'before';
export type FocusDayPickerContext = Partial<
Pick<
DayPickerContextValue,
'ISOWeek' | 'weekStartsOn' | 'fromDate' | 'toDate' | 'locale'
>
>;
export type FocusDayOptions = {
moveBy: MoveFocusBy;
direction: MoveFocusDirection;
context: FocusDayPickerContext;
modifiers?: Modifiers;
retry?: { count: number; lastFocused: Date };
};
const MAX_RETRY = 365;
/** Return the next date to be focused. */
export function getNextFocus(focusedDay: Date, options: FocusDayOptions): Date {
const {
moveBy,
direction,
context,
modifiers,
retry = { count: 0, lastFocused: focusedDay }
} = options;
const { weekStartsOn, fromDate, toDate, locale } = context;
const moveFns = {
day: addDays,
week: addWeeks,
month: addMonths,
year: addYears,
startOfWeek: (date: Date) =>
context.ISOWeek
? startOfISOWeek(date)
: startOfWeek(date, { locale, weekStartsOn }),
endOfWeek: (date: Date) =>
context.ISOWeek
? endOfISOWeek(date)
: endOfWeek(date, { locale, weekStartsOn })
};
let newFocusedDay = moveFns[moveBy](
focusedDay,
direction === 'after' ? 1 : -1
);
if (direction === 'before' && fromDate) {
newFocusedDay = max([fromDate, newFocusedDay]);
} else if (direction === 'after' && toDate) {
newFocusedDay = min([toDate, newFocusedDay]);
}
let isFocusable = true;
if (modifiers) {
const activeModifiers = getActiveModifiers(newFocusedDay, modifiers);
isFocusable = !activeModifiers.disabled && !activeModifiers.hidden;
}
if (isFocusable) {
return newFocusedDay;
} else {
if (retry.count > MAX_RETRY) {
return retry.lastFocused;
}
return getNextFocus(newFocusedDay, {
moveBy,
direction,
context,
modifiers,
retry: {
...retry,
count: retry.count + 1
}
});
}
}
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