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<script>
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import Button from '../button/index'
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import Pager from './Pager'
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import Options from './Options'
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import locale from './locale/zh_CN'
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import KEYCODE from './KeyCode'
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// 是否是正整数
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function isInteger (value) {
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return typeof value === 'number' &&
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isFinite(value) &&
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Math.floor(value) === value
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}
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function defaultItemRender (page, type, element) {
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return element
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}
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export default {
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name: 'Pagination',
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props: {
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prefixCls: {
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type: String,
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default: 'ant-pagination',
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},
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current: {
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type: [Number, String],
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default: 1,
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},
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total: {
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type: [Number, String],
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default: 0,
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},
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pageSize: {
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type: [Number, String],
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default: 10,
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},
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showSizeChanger: {
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type: Boolean,
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default: false,
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},
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pageSizeOptions: {
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type: Array,
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default: () => ['10', '20', '30', '40'],
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},
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showQuickJumper: {
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type: Boolean,
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default: false,
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},
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size: {
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type: String,
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default: '',
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},
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simple: Boolean,
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showTitle: {
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type: Boolean,
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default: true,
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},
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showTotal: Function,
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itemRender: {
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type: Function,
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default: defaultItemRender,
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},
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},
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model: {
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prop: 'current',
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},
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data () {
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const { current } = this
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return {
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stateCurrent: +current,
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}
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},
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methods: {
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isValid (page) {
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return isInteger(page) && page >= 1 && page !== this.stateCurrent
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},
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calculatePage (p) {
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let pageSize = p
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if (typeof pageSize === 'undefined') {
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pageSize = this.pageSize
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}
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return Math.floor((this.total - 1) / pageSize) + 1
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},
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handleGoTO (event) {
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if (event.keyCode === KEYCODE.ENTER || event.type === 'click') {
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this.handleChange(this.stateCurrent)
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}
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},
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prev () {
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if (this.hasPrev()) {
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this.handleChange(this.stateCurrent - 1)
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}
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},
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next () {
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if (this.hasNext()) {
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this.handleChange(this.stateCurrent + 1)
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}
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},
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hasPrev () {
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return this.stateCurrent > 1
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},
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hasNext () {
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return this.stateCurrent < this.calculatePage()
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},
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handleKeyDown (event) {
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if (event.keyCode === KEYCODE.ARROW_UP || event.keyCode === KEYCODE.ARROW_DOWN) {
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event.preventDefault()
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}
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},
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handleKeyUp (event) {
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const inputValue = event.target.value
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const stateCurrent = this.stateCurrent
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let value
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if (inputValue === '') {
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value = inputValue
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} else if (isNaN(Number(inputValue))) {
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value = stateCurrent
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} else {
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value = Number(inputValue)
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}
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event.target.value = value
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if (event.keyCode === KEYCODE.ENTER) {
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this.handleChange(value)
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} else if (event.keyCode === KEYCODE.ARROW_UP) {
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this.handleChange(value - 1)
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} else if (event.keyCode === KEYCODE.ARROW_DOWN) {
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this.handleChange(value + 1)
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}
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},
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handleChange (p) {
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let page = p
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if (this.isValid(page)) {
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const allTotal = this.calculatePage()
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if (page > allTotal) {
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page = allTotal
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}
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this.stateCurrent = page
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this.$emit('input', page)
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this.$emit('change', page, this.pageSize)
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return page
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}
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return this.stateCurrent
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},
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runIfEnter (event, callback, ...restParams) {
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if (event.key === 'Enter' || event.charCode === 13) {
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callback(...restParams)
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}
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},
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runIfEnterPrev (event) {
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this.runIfEnter(event, this.prev)
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},
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runIfEnterNext (event) {
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this.runIfEnter(event, this.next)
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},
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runIfEnterJumpPrev (event) {
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this.runIfEnter(event, this.jumpPrev)
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},
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runIfEnterJumpNext (event) {
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this.runIfEnter(event, this.jumpNext)
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},
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getJumpPrevPage () {
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return Math.max(1, this.stateCurrent - (this.showLessItems ? 3 : 5))
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},
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getJumpNextPage () {
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return Math.min(this.calculatePage(), this.stateCurrent + (this.showLessItems ? 3 : 5))
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},
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jumpPrev () {
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this.handleChange(this.getJumpPrevPage())
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},
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jumpNext () {
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this.handleChange(this.getJumpNextPage())
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},
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},
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watch: {
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current (val) {
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this.stateCurrent = +val
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},
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},
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components: {
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vcButton: Button,
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Pager,
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},
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render () {
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const prefixCls = this.prefixCls
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const allPages = this.calculatePage()
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const pagerList = []
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let jumpPrev = null
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let jumpNext = null
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let firstPager = null
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let lastPager = null
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let gotoButton = null
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const goButton = this.showQuickJumper
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const pageBufferSize = this.showLessItems ? 1 : 2
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const { stateCurrent, pageSize } = this
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const smallClass = this.size === 'small' ? 'mini' : ''
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const prevPage = stateCurrent - 1 > 0 ? stateCurrent - 1 : 0
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const nextPage = stateCurrent + 1 < allPages ? stateCurrent + 1 : allPages
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if (this.simple) {
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if (goButton) {
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if (typeof goButton === 'boolean') {
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gotoButton = (
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<li
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title={this.showTitle ? `${locale.jump_to}${stateCurrent}/${allPages}` : null}
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class={`${prefixCls}-simple-pager`}
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>
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<vc-button
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onClick={this.handleGoTO}
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onKeyup={this.handleGoTO}
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>
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{locale.jump_to_confirm}
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</vc-button>
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</li>
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)
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} else {
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gotoButton = goButton
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}
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}
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return (
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<ul class={`${prefixCls} ${prefixCls}-simple ${smallClass}`}>
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<li
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title={this.showTitle ? locale.prev_page : null}
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onClick={this.prev}
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tabIndex='0'
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onKeypress={this.runIfEnterPrev}
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class={`${this.hasPrev() ? '' : `${prefixCls}-disabled`} ${prefixCls}-prev`}
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aria-disabled={!this.hasPrev()}
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>
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{this.itemRender(prevPage, 'prev', <a class={`${prefixCls}-item-link`} />)}
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</li>
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<li
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title={this.showTitle ? `${stateCurrent}/${allPages}` : null}
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class={`${prefixCls}-simple-pager`}
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>
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<input
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type='text'
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value={this.stateCurrent}
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onKeydown={this.handleKeyDown}
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onKeyup={this.handleKeyUp}
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onChange={this.handleKeyUp}
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size='3'
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/>
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<span class={`${prefixCls}-slash`}>／</span>
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{allPages}
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</li>
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<li
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title={this.showTitle ? locale.next_page : null}
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onClick={this.next}
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tabIndex='0'
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onKeypress={this.runIfEnterNext}
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class={`${this.hasNext() ? '' : `${prefixCls}-disabled`} ${prefixCls}-next`}
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aria-disabled={!this.hasNext()}
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>
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{this.itemRender(nextPage, 'next', <a class={`${prefixCls}-item-link`} />)}
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</li>
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{gotoButton}
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</ul>
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)
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}
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if (allPages <= 5 + pageBufferSize * 2) {
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for (let i = 1; i <= allPages; i++) {
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const active = stateCurrent === i
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pagerList.push(
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<Pager
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rootPrefixCls={this.prefixCls}
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onClick={this.handleChange}
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onKeypress={this.runIfEnter}
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key={i}
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page={i}
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active={active}
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showTitle={this.showTitle}
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itemRender={this.itemRender}
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/>
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)
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}
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} else {
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const prevItemTitle = this.showLessItems ? locale.prev_3 : locale.prev_5
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const nextItemTitle = this.showLessItems ? locale.next_3 : locale.next_5
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jumpPrev = (
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<li
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title={this.showTitle ? prevItemTitle : null}
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key='prev'
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onClick={this.jumpPrev}
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tabIndex='0'
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onKeypress={this.runIfEnterJumpPrev}
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class={`${prefixCls}-jump-prev`}
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>
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{this.itemRender(
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this.getJumpPrevPage(), 'jump-prev', <a class={`${prefixCls}-item-link`} />
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)}
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</li>
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)
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jumpNext = (
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<li
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title={this.showTitle ? nextItemTitle : null}
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key='next'
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tabIndex='0'
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onClick={this.jumpNext}
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onKeypress={this.runIfEnterJumpNext}
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class={`${prefixCls}-jump-next`}
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>
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{this.itemRender(
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this.getJumpNextPage(), 'jump-next', <a class={`${prefixCls}-item-link`} />
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)}
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</li>
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)
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lastPager = (
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<Pager
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rootPrefixCls={prefixCls}
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onClick={this.handleChange}
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onKeypress={this.runIfEnter}
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key={allPages}
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page={allPages}
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active={false}
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showTitle={this.showTitle}
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itemRender={this.itemRender}
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/>
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)
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firstPager = (
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<Pager
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rootPrefixCls={prefixCls}
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onClick={this.handleChange}
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onKeypress={this.runIfEnter}
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key={1}
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page={1}
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active={false}
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showTitle={this.showTitle}
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itemRender={this.itemRender}
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/>
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)
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let left = Math.max(1, stateCurrent - pageBufferSize)
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let right = Math.min(stateCurrent + pageBufferSize, allPages)
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if (stateCurrent - 1 <= pageBufferSize) {
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right = 1 + pageBufferSize * 2
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}
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if (allPages - stateCurrent <= pageBufferSize) {
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left = allPages - pageBufferSize * 2
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}
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for (let i = left; i <= right; i++) {
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const active = stateCurrent === i
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pagerList.push(
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<Pager
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rootPrefixCls={prefixCls}
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onClick={this.handleChange}
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onKeypress={this.runIfEnter}
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key={i}
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page={i}
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active={active}
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showTitle={this.showTitle}
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itemRender={this.itemRender}
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/>
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)
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}
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if (stateCurrent - 1 >= pageBufferSize * 2 && stateCurrent !== 1 + 2) {
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pagerList[0] = (
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<Pager
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rootPrefixCls={prefixCls}
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onClick={this.handleChange}
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onKeypress={this.runIfEnter}
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key={left}
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page={left}
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className={`${prefixCls}-item-after-jump-prev`}
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active={false}
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showTitle={this.showTitle}
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itemRender={this.itemRender}
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/>
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)
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pagerList.unshift(jumpPrev)
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}
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if (allPages - stateCurrent >= pageBufferSize * 2 && stateCurrent !== allPages - 2) {
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pagerList[pagerList.length - 1] = (
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<Pager
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rootPrefixCls={prefixCls}
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onClick={this.handleChange}
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onKeypress={this.runIfEnter}
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key={right}
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page={right}
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className={`${prefixCls}-item-before-jump-next`}
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active={false}
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showTitle={this.showTitle}
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itemRender={this.itemRender}
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/>
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)
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pagerList.push(jumpNext)
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}
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if (left !== 1) {
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pagerList.unshift(firstPager)
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}
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if (right !== allPages) {
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pagerList.push(lastPager)
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}
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}
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let totalText = null
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if (this.showTotal) {
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totalText = (
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<li class={`${prefixCls}-total-text`}>
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{this.showTotal(
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this.total,
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[
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(stateCurrent - 1) * pageSize + 1,
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stateCurrent * pageSize > this.total ? this.total : stateCurrent * pageSize,
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]
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)}
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</li>
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)
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}
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const prevDisabled = !this.hasPrev()
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const nextDisabled = !this.hasNext()
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return (
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<ul
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class={`${prefixCls} ${smallClass}`}
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unselectable='unselectable'
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>
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{totalText}
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<li
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title={this.showTitle ? locale.prev_page : null}
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onClick={this.prev}
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tabIndex='0'
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onKeypress={this.runIfEnterPrev}
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class={`${!prevDisabled ? '' : `${prefixCls}-disabled`} ${prefixCls}-prev`}
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aria-disabled={prevDisabled}
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>
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{this.itemRender(prevPage, 'prev', <a class={`${prefixCls}-item-link`} />)}
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</li>
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{pagerList}
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<li
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title={this.showTitle ? locale.next_page : null}
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onClick={this.next}
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tabIndex='0'
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onKeypress={this.runIfEnterNext}
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class={`${!nextDisabled ? '' : `${prefixCls}-disabled`} ${prefixCls}-next`}
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aria-disabled={nextDisabled}
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>
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{this.itemRender(nextPage, 'next', <a class={`${prefixCls}-item-link`} />)}
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</li>
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<Options
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locale={locale}
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rootPrefixCls={prefixCls}
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selectComponentClass={this.selectComponentClass}
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selectPrefixCls={this.selectPrefixCls}
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changeSize={this.showSizeChanger ? this.changePageSize : null}
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current={stateCurrent}
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pageSize={pageSize}
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pageSizeOptions={this.pageSizeOptions}
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quickGo={this.showQuickJumper ? this.handleChange : null}
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goButton={goButton}
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/>
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</ul>
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)
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},
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}
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</script>
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