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| <template>
<div class="mu-pagination" v-if="total">
<page-item identifier="singleBack" @click="handleClick" :disabled="leftDisabled">
<svg viewBox="0 0 24 24" class="mu-pagination-svg-icon">
<path d="M15.41 7.41L14 6l-6 6 6 6 1.41-1.41L10.83 12z"/>
</svg>
</page-item>
<page-item :index="1" @click="handleClick" :isActive="actualCurrent === 1"/>
<page-item v-if="totalPageCount > 5 && actualCurrent - 1 >= 4" identifier="backs" @click="handleClick" title="前5页">
<span>...</span>
</page-item>
<page-item v-for="item in pageList" :key="item" :index="item" @click="handleClick" :isActive="actualCurrent === item"/>
<page-item v-if="totalPageCount > 5 && totalPageCount - actualCurrent >= 4" identifier="forwards" @click="handleClick" title="后5页">
<span>...</span>
</page-item>
<page-item :index="totalPageCount" @click="handleClick" :isActive="actualCurrent === totalPageCount" v-if="totalPageCount !== 1"></page-item>
<page-item identifier="singleForward" @click="handleClick" :disabled="rightDisabled">
<svg viewBox="0 0 24 24" class="mu-pagination-svg-icon">
<path d="M10 6L8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/>
</svg>
</page-item>
<select-field v-if="showSizeChanger" v-model="actualPageSize" :style="{width: '100px'}">
<menu-item v-for="item in pageSizeOption" :key="'mt_' + item" :value="item" :title="item + ' / 页'" :style="{width: '100px'}"/>
</select-field>
<!-- <text-field v-if="showQuickJumper" type="number" hintText="快速跳转" :style="{width: '70px'}" v-model="quickJumpPage" @keyup.native.enter="quickJump"/> -->
</div>
</template>
<script>
import pageItem from './pageItem'
import selectField from '../selectField'
import textField from '../textField'
import menuItem from '../menu/menuItem'
export default{
name: 'mu-pagination',
props: {
total: {
type: Number,
default: 1
},
current: {
type: Number,
default: 1
},
defaultPageSize: {
type: Number,
default: 10
},
pageSize: {
type: Number
},
showSizeChanger: {
type: Boolean,
default: false
},
pageSizeOption: {
type: Array,
default: () => [10, 20, 30, 40]
}
// showQuickJumper: {
// type: Boolean,
// default: false
// }
},
data () {
return {
leftDisabled: false,
rightDisabled: false,
actualCurrent: this.current,
actualPageSize: this.defaultPageSize,
totalPageCount: 0,
pageList: [],
quickJumpPage: ''
}
},
mounted () {
this.iconIsDisabled(this.actualCurrent)
// 优先使用pageSizeOption,如果props配置了默认值，那么该props无论在父组件
// 中是否配置该值都不会为undefined,所以需要使用showSizeChanger来做这个判断
// 才对
if (this.showSizeChanger) {
this.actualPageSize = this.pageSizeOption[0]
} else if (this.pageSize) {
this.actualPageSize = this.pageSize
}
this.totalPageCount = Math.ceil(this.total / this.actualPageSize)
this.pageList = this.calcPageList(this.actualCurrent)
},
methods: {
handleClick (res) {
if (typeof res === 'number') {
this.actualCurrent = res
} else {
switch (res) {
case 'singleBack':
this.actualCurrent = Math.max(1, this.actualCurrent - 1)
break
case 'backs':
this.actualCurrent = Math.max(1, this.actualCurrent - 5)
break
case 'forwards':
this.actualCurrent = Math.min(this.totalPageCount, this.actualCurrent + 5)
break
case 'singleForward':
this.actualCurrent = Math.min(this.totalPageCount, this.actualCurrent + 1)
break
}
}
},
iconIsDisabled (current) {
this.leftDisabled = current === 1
this.rightDisabled = current === this.totalPageCount
},
calcPageList (current) {
let pageList = []
if (this.totalPageCount > 5) {
let left = Math.max(2, current - 2)
let right = Math.min(current + 2, this.totalPageCount - 1)
if (current - 1 < 2) {
right = 4
}
if (this.totalPageCount - current < 2) {
left = this.totalPageCount - 3
}
for (let i = left; i <= right; i++) {
pageList.push(i)
}
} else {
for (let i = 2; i < this.totalPageCount; i++) {
pageList.push(i)
}
}
return pageList
},
pageSizeAndTotalChange (current) {
this.iconIsDisabled(current)
this.pageList = this.calcPageList(current)
}
// quickJump () {
// if (this.quickJumpPage) {
// this.actualCurrent = Math.min(this.quickJumpPage, this.totalPageCount)
// }
// }
},
components: {
'page-item': pageItem,
'select-field': selectField,
'text-field': textField,
'menu-item': menuItem
},
watch: {
actualCurrent: function (val) {
if (val === 0) {
return
}
this.pageSizeAndTotalChange(val)
this.$emit('pageChange', val)
this.$emit('page-change', val)
},
actualPageSize: function (val, oldVal) {
// 如果页面条数改变的时候,对应的当前页也是需要重新计算的,
// 计算规则是根据当前页的起始索引来计算该索引位于新的pageSize
// 中的页码
let itemIndex = oldVal * (this.actualCurrent - 1)
let oldCurrent = this.actualCurrent
this.actualCurrent = Math.floor(itemIndex / val) + 1
// 页码条数改变的时候当前页不一定改变,但是我们必须重新计算一些依赖的参数
this.totalPageCount = Math.ceil(this.total / this.actualPageSize)
if (oldCurrent === this.actualCurrent) {
this.pageSizeAndTotalChange(oldCurrent)
}
this.$emit('pageSizeChange', val)
this.$emit('page-size-change', val)
},
total: function (val) {
// 如果条目总数改变的时候当前页也需要重新计算
let oldCurrent = this.actualCurrent
this.actualCurrent = Math.min(this.totalPageCount, this.actualCurrent)
// 总条数改变的时候当前页不一定改变,但是我们必须重新计算一些依赖的参数,
// 比如total从10变为11(pageSize=10),那么current没变,不过右前进的按钮应该由
// disable变为enable的
this.totalPageCount = Math.ceil(this.total / this.actualPageSize)
if (oldCurrent === this.actualCurrent) {
this.pageSizeAndTotalChange(oldCurrent)
}
},
current (val) {
this.actualCurrent = val
}
}
}
</script>
<style lang="less">
@import "../styles/import.less";
.mu-pagination{
display: flex;
justify-content: flex-start;
align-items: center;
}
.mu-pagination-svg-icon{
display: inline-block;
width: 24px;
height: 24px;
fill: currentColor;
user-select: none;
transition: all 450ms @easeOutFunction;
}
</style>
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