File size: 3,165 Bytes
cf86710 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | import type { DateLibOptions } from "../classes/DateLib.js";
import * as defaultLabels from "../labels/index.js";
import type { DayPickerProps, Labels } from "../types/index.js";
// Use a bivariant callable type to accept both the exact label signatures and
// compatible overrides. This matches how React types event handlers, allowing
// consumers to pass narrower or slightly different function shapes without
// losing type safety.
type BivariantLabel<Args extends unknown[]> = {
bivarianceHack(...args: Args): string;
}["bivarianceHack"];
const resolveLabel = <Args extends unknown[], T extends BivariantLabel<Args>>(
defaultLabel: T,
customLabel: T | undefined,
localeLabel: string | T | undefined,
): T => {
if (customLabel) return customLabel;
if (localeLabel) {
return (
typeof localeLabel === "function"
? localeLabel
: (..._args: Args) => localeLabel
) as T;
}
return defaultLabel;
};
/**
* Merges custom labels from the props with the default labels.
*
* When available, uses the locale-provided translation for `labelNext`.
*
* @param customLabels The custom labels provided in the DayPicker props.
* @param options Options from the date library, used to resolve locale
* translations.
* @returns The merged labels object with locale-aware defaults.
*/
export function getLabels(
customLabels: DayPickerProps["labels"],
options: DateLibOptions,
): Labels {
const localeLabels = options.locale?.labels ?? {};
return {
...defaultLabels,
...(customLabels ?? {}),
labelDayButton: resolveLabel(
defaultLabels.labelDayButton,
customLabels?.labelDayButton,
localeLabels.labelDayButton,
),
labelMonthDropdown: resolveLabel(
defaultLabels.labelMonthDropdown,
customLabels?.labelMonthDropdown,
localeLabels.labelMonthDropdown,
),
labelNext: resolveLabel(
defaultLabels.labelNext,
customLabels?.labelNext,
localeLabels.labelNext,
),
labelPrevious: resolveLabel(
defaultLabels.labelPrevious,
customLabels?.labelPrevious,
localeLabels.labelPrevious,
),
labelWeekNumber: resolveLabel(
defaultLabels.labelWeekNumber,
customLabels?.labelWeekNumber,
localeLabels.labelWeekNumber,
),
labelYearDropdown: resolveLabel(
defaultLabels.labelYearDropdown,
customLabels?.labelYearDropdown,
localeLabels.labelYearDropdown,
),
labelGrid: resolveLabel(
defaultLabels.labelGrid,
customLabels?.labelGrid,
localeLabels.labelGrid,
),
labelGridcell: resolveLabel(
defaultLabels.labelGridcell,
customLabels?.labelGridcell,
localeLabels.labelGridcell,
),
labelNav: resolveLabel(
defaultLabels.labelNav,
customLabels?.labelNav,
localeLabels.labelNav,
),
labelWeekNumberHeader: resolveLabel(
defaultLabels.labelWeekNumberHeader,
customLabels?.labelWeekNumberHeader,
localeLabels.labelWeekNumberHeader,
),
labelWeekday: resolveLabel(
defaultLabels.labelWeekday,
customLabels?.labelWeekday,
localeLabels.labelWeekday,
),
};
}
|