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[web] rename all the JSX files to .jsx/.tsx GitOrigin-RevId: 82056ae47e017523722cf258dcc83c8a925a28f7
170 lines
4.3 KiB
JavaScript
170 lines
4.3 KiB
JavaScript
import { useMemo } from 'react'
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import PropTypes from 'prop-types'
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import classNames from 'classnames'
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import { useTranslation } from 'react-i18next'
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function Pagination({ currentPage, totalPages, handlePageClick }) {
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const { t } = useTranslation()
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const maxOtherPageButtons = useMemo(() => {
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let maxOtherPageButtons = 4 // does not include current page, prev/next buttons
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if (totalPages < maxOtherPageButtons + 1) {
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maxOtherPageButtons = totalPages - 1
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}
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return maxOtherPageButtons
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}, [totalPages])
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const pageButtons = useMemo(() => {
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const result = []
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let nextPage = currentPage + 1
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let prevPage = currentPage - 1
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function calcPages() {
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if (nextPage && nextPage <= totalPages) {
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result.push(nextPage)
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nextPage++
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} else {
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nextPage = undefined
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}
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if (prevPage && prevPage > 0) {
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result.push(prevPage)
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prevPage--
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} else {
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prevPage = undefined
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}
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}
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while (result.length < maxOtherPageButtons) {
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calcPages()
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}
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result.push(currentPage) // wait until prev/next calculated to add current
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result.sort((a, b) => a - b) // sort numerically
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return result
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}, [currentPage, totalPages, maxOtherPageButtons])
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const morePrevPages = useMemo(() => {
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return pageButtons[0] !== 1 && currentPage - maxOtherPageButtons / 2 > 1
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}, [pageButtons, currentPage, maxOtherPageButtons])
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const moreNextPages = useMemo(() => {
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return pageButtons[pageButtons.length - 1] < totalPages
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}, [pageButtons, totalPages])
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return (
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<nav role="navigation" aria-label={t('pagination_navigation')}>
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<ul className="pagination">
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{currentPage > 1 && (
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<li>
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<button
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onClick={event => handlePageClick(event, currentPage - 1)}
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aria-label={t('go_prev_page')}
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>
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«
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</button>
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</li>
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)}
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{morePrevPages && (
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<li>
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<span className="ellipses">…</span>
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</li>
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)}
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{pageButtons.map(page => (
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<PaginationItem
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key={`prev-page-${page}`}
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page={page}
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currentPage={currentPage}
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handlePageClick={handlePageClick}
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/>
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))}
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{moreNextPages && (
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<li>
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<span className="ellipses">…</span>
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</li>
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)}
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{currentPage < totalPages && (
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<li>
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<button
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onClick={event => handlePageClick(event, currentPage + 1)}
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aria-label={t('go_next_page')}
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>
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»
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</button>
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</li>
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)}
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</ul>
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</nav>
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)
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}
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function PaginationItem({ page, currentPage, handlePageClick }) {
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const { t } = useTranslation()
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const itemClassName = classNames({ active: currentPage === page })
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const ariaCurrent = currentPage === page
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const ariaLabel =
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currentPage === page ? t('page_current', { page }) : t('go_page', { page })
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return (
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<li className={itemClassName}>
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<button
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aria-current={ariaCurrent}
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onClick={event => handlePageClick(event, page)}
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aria-label={ariaLabel}
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>
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{page}
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</button>
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</li>
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)
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}
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function isPositiveNumber(value) {
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return typeof value === 'number' && value > 0
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}
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function isCurrentPageWithinTotalPages(currentPage, totalPages) {
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return currentPage <= totalPages
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}
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Pagination.propTypes = {
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currentPage: function (props, propName, componentName) {
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if (
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!isPositiveNumber(props[propName]) ||
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!isCurrentPageWithinTotalPages(props.currentPage, props.totalPages)
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) {
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return new Error(
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'Invalid prop `' +
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propName +
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'` supplied to' +
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' `' +
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componentName +
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'`. Validation failed.'
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)
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}
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},
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totalPages: function (props, propName, componentName) {
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if (!isPositiveNumber(props[propName])) {
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return new Error(
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'Invalid prop `' +
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propName +
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'` supplied to' +
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' `' +
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componentName +
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'`. Validation failed.'
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)
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}
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},
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handlePageClick: PropTypes.func.isRequired,
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}
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PaginationItem.propTypes = {
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currentPage: PropTypes.number.isRequired,
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page: PropTypes.number.isRequired,
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handlePageClick: PropTypes.func.isRequired,
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}
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export default Pagination
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