1 | import type { DateLib, DayPickerProps } from "../types/index.js";
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2 |
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3 |
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4 | export function getNavMonths(
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5 | props: Pick<
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6 | DayPickerProps,
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7 | | "captionLayout"
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8 | | "endMonth"
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9 | | "startMonth"
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10 | | "today"
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11 |
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12 | | "fromMonth"
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13 | | "fromYear"
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14 | | "toMonth"
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15 | | "toYear"
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16 | >,
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17 | dateLib: DateLib
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18 | ): [start: Date | undefined, end: Date | undefined] {
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19 | let { startMonth, endMonth } = props;
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20 |
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21 | const {
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22 | startOfYear,
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23 | startOfDay,
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24 | startOfMonth,
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25 | endOfMonth,
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26 | addYears,
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27 | endOfYear,
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28 | Date
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29 | } = dateLib;
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30 |
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31 |
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32 | const { fromYear, toYear, fromMonth, toMonth } = props;
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33 | if (!startMonth && fromMonth) {
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34 | startMonth = fromMonth;
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35 | }
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36 | if (!startMonth && fromYear) {
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37 | startMonth = new Date(fromYear, 0, 1);
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38 | }
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39 | if (!endMonth && toMonth) {
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40 | endMonth = toMonth;
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41 | }
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42 | if (!endMonth && toYear) {
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43 | endMonth = new Date(toYear, 11, 31);
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44 | }
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45 |
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46 | const hasDropdowns = props.captionLayout?.startsWith("dropdown");
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47 | if (startMonth) {
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48 | startMonth = startOfMonth(startMonth);
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49 | } else if (fromYear) {
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50 | startMonth = new Date(fromYear, 0, 1);
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51 | } else if (!startMonth && hasDropdowns) {
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52 | startMonth = startOfYear(addYears(props.today ?? new Date(), -100));
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53 | }
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54 | if (endMonth) {
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55 | endMonth = endOfMonth(endMonth);
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56 | } else if (toYear) {
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57 | endMonth = new Date(toYear, 11, 31);
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58 | } else if (!endMonth && hasDropdowns) {
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59 | endMonth = endOfYear(props.today ?? new Date());
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60 | }
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61 | return [
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62 | startMonth ? startOfDay(startMonth) : startMonth,
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63 | endMonth ? startOfDay(endMonth) : endMonth
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64 | ];
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65 | }
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