Method _buildWeeks

packages/main/src/DayPicker.ts:227–371

* Builds the "_weeks" object that represents the month. * @param localeData * @private

(localeData: LocaleData)

	 * @private
	 */
	_buildWeeks(localeData: LocaleData) {
		if (this._hidden) {
			return; // Optimization to not do any work unless the current picker
		}

		this._weeks = [];

		const firstDayOfWeek = this._getFirstDayOfWeek();
		const specialCalendarDates = this._specialCalendarDates;
		const monthsNames = localeData.getMonths("wide", this._primaryCalendarType);
		const secondaryMonthsNames = this.hasSecondaryCalendarType ? localeData.getMonths("wide", this.secondaryCalendarType) : [];
		const nonWorkingDayLabel = DayPicker.i18nBundle.getText(DAY_PICKER_NON_WORKING_DAY);
		const todayLabel = DayPicker.i18nBundle.getText(DAY_PICKER_TODAY);
		const tempDate = this._getFirstDay(); // date that will be changed by 1 day 42 times
		const todayDate = CalendarDate.fromLocalJSDate(UI5Date.getInstance(), this._primaryCalendarType); // current day date - calculate once
		const calendarDate = this._calendarDate; // store the _calendarDate value as this getter is expensive and degrades IE11 perf

		const minDate = this._minDate;
		const maxDate = this._maxDate;
		const precomputedDisabledDates = this._precomputeDisabledDates();

		const tempSecondDate = this.hasSecondaryCalendarType ? this._getSecondaryDay(tempDate) : undefined;

		let week: Week = [];
		for (let i = 0; i < DAYS_IN_WEEK * 6; i++) { // always show 6 weeks total, 42 days to avoid jumping
			const timestamp = tempDate.valueOf() / 1000; // no need to round because CalendarDate does it

			let dayOfTheWeek = tempDate.getDay() - firstDayOfWeek;
			if (dayOfTheWeek < 0) {
				dayOfTheWeek += DAYS_IN_WEEK;
			}

			const specialCalendarDate = specialCalendarDates.find(specialDate => specialDate.specialDateTimestamp === timestamp);
			const specialDayType = specialCalendarDate ? specialCalendarDate.type : "";
			const specialDayTooltip = specialCalendarDate ? specialCalendarDate.tooltip : "";
			const unnamedCalendarTypeLabel = specialDayTooltip && !this._isDefaultCalendarLegendType(specialDayType) ? specialDayTooltip : "";

			const isFocused = tempDate.getMonth() === calendarDate.getMonth() && tempDate.getDate() === calendarDate.getDate();
			const isSelected = this._isDaySelected(timestamp);
			const isSelectedBetween = this._isDayInsideSelectionRange(timestamp);
			const isOtherMonth = tempDate.getMonth() !== calendarDate.getMonth();
			const isWeekend = this._isWeekend(tempDate);
			const isDisabled = !this._isDateEnabled(tempDate, minDate, maxDate, precomputedDisabledDates);
			const isToday = tempDate.isSame(todayDate);
			const isFirstDayOfWeek = tempDate.getDay() === firstDayOfWeek;

			const nonWorkingAriaLabel = (isWeekend || specialDayType === "NonWorking") && specialDayType !== "Working"
				? `${nonWorkingDayLabel} `
				: "";
			const todayAriaLabel = isToday ? `${todayLabel} ` : "";

			const tempSecondDateNumber = tempSecondDate ? tempSecondDate.getDate() : "";
			const tempSecondYearNumber = tempSecondDate ? tempSecondDate.getYear() : "";
			const secondaryMonthsNamesString = secondaryMonthsNames.length > 0 ? secondaryMonthsNames[tempSecondDate!.getMonth()] : "";

			const tooltip = `${todayAriaLabel}${nonWorkingAriaLabel}${unnamedCalendarTypeLabel}`.trim();

			let ariaLabel = this.hasSecondaryCalendarType