Method _getGridStartYear

packages/main/src/YearRangePicker.ts:174–199

()

	}

	_getGridStartYear() {
		const rangeSize = this._getRangeSize();
		const pageSize = this._getPageSize();
		const pageSizeInYears = rangeSize * pageSize;
		const yearsOffset = rangeSize * this._getInitialFocusedIndex();
		const currentStartYear = this._currentYearRange?.startYear ? this._currentYearRange?.startYear : this._calendarDate.getYear();

		// On first load, current range should be the 3rd item in the grid
		let gridStartYear = this._gridStartYear ? this._gridStartYear : currentStartYear - yearsOffset;

		// If page navigation occured, update the current range start year
		gridStartYear += Math.floor((currentStartYear - gridStartYear) / pageSizeInYears) * pageSizeInYears;

		// Normalize grid start year to be between the min and absolute max year
		const minYear = this._minDate.getYear();
		if (currentStartYear - rangeSize < minYear) {
			gridStartYear = minYear;
		}

		const absoluteMaxYear = getMaxCalendarDate(this._primaryCalendarType).getYear();
		if (currentStartYear + pageSizeInYears > absoluteMaxYear) {
			gridStartYear = absoluteMaxYear - pageSizeInYears + 1;
		}

		return gridStartYear;
	}

	_getYearRanges() {
		const yearFormat = DateFormat.getDateInstance({ format: "y", calendarType: this._primaryCalendarType });