abb-antd/src/components/Table/index.js

import T from 'ant-design-vue/es/table/Table'
import get from 'lodash.get'
import BaseTool from '@/utils/tool'
export default {
  data () {
    return {
      needTotalList: [],

      selectedRows: [],
      selectedRowKeys: [],
      checkCustomMap: {},
      localLoading: false,
      localDataSource: [],
      // localPagination: Object.assign({}, this.pagination)
      localPagination: Object.assign({}, {
        ...this.pagination,
        showTotal: total => `共 ${total} 条数据`,
        showSizeChanger: true,
        pageSizeOptions: ['10', '20', '50', '100', '150']
      })
    }
  },
  props: Object.assign({}, T.props, {
    widthSpace: {
      type: Boolean,
      default: false
    },
    rowKey: {
      type: [String, Function],
      default: 'key'
    },
    data: {
      type: Function,
      required: true
    },
    pageNum: {
      type: Number,
      default: 1
    },
    pageSize: {
      type: Number,
      default: 50
    },
    showSizeChanger: {
      type: Boolean,
      default: true
    },
    size: {
      type: String,
      default: 'default'
    },
    /**
     * alert: {
     *   show: true,
     *   clear: Function
     * }
     */
    alert: {
      type: [Object, Boolean],
      default: null
    },
    rowSelection: {
      type: Object,
      default: null
    },
    /** @Deprecated */
    showAlertInfo: {
      type: Boolean,
      default: false
    },
    showPagination: {
      type: String | Boolean,
      default: 'auto'
    },
    /**
     * enable page URI mode
     *
     * e.g:
     * /users/1
     * /users/2
     * /users/3?queryParam=test
     * ...
     */
    pageURI: {
      type: Boolean,
      default: false
    }
  }),
  watch: {
    columns (val, oldVal) { // 深度监听，可监听到对象、数组的变化
      let isChecked = 0
      val.forEach((item, index) => {
        if (item['checked'] == null) {
          item['checked'] = false
        }
        if (item['checked']) {
          isChecked++
        }
        this.checkCustomMap[item.title] = item
      })
      if (isChecked === 0) {
        val.forEach((item, index) => {
          if (index < 8) {
            item['checked'] = true
            this.checkCustomMap[item.title] = item
          }
          if (item.title === '操作') {
            item['checked'] = true
            this.checkCustomMap[item.title] = item
          }
        })
      }
    },
    widthSpace (val) {
      Object.assign(this.localPagination, {
        widthSpace: val
      })
    },
    'localPagination.current' (val) {
      this.pageURI && this.$router.push({
        ...this.$route,
        name: this.$route.name,
        params: Object.assign({}, this.$route.params, {
          pageNum: val
        })
      })
    },
    pageNum (val) {
      Object.assign(this.localPagination, {
        current: val
      })
    },
    pageSize (val) {
      Object.assign(this.localPagination, {
        pageSize: val
      })
    },
    showSizeChanger (val) {
      Object.assign(this.localPagination, {
        showSizeChanger: val
      })
    }
  },
  created () {
    const { pageNum } = this.$route.params
    const localPageNum = this.pageURI && (pageNum && parseInt(pageNum)) || this.pageNum
    this.localPagination = ['auto', true].includes(this.showPagination) && Object.assign({}, this.localPagination, {
      current: localPageNum,
      pageSize: this.pageSize,
      showSizeChanger: this.showSizeChanger
    }) || false
    this.needTotalList = this.initTotalList(this.columns)
    let isChecked = 0
    this.columns.forEach((item, index) => {
      if (item['checked'] == null) {
        item['checked'] = false
      }
      if (item['checked']) {
        isChecked++
      }
      this.checkCustomMap[item.title] = item
    })
    if (isChecked === 0) {
      this.columns.forEach((item, index) => {
        if (index < 8) {
          item['checked'] = true
          this.checkCustomMap[item.title] = item
        }
        if (item.title === '操作') {
          item['checked'] = true
          this.checkCustomMap[item.title] = item
        }
      })
    }
    this.loadData()
  },
  methods: {
    /**
     * 表格重新加载方法
     * 如果参数为 true, 则强制刷新到第一页
     * @param Boolean bool
     */
    refresh (bool = false) {
      bool && (this.localPagination = Object.assign({}, {
        current: 1, pageSize: this.pageSize
      }))
      this.loadData()
    },
    /**
     * 加载数据方法
     * @param {Object} pagination 分页选项器
     * @param {Object} filters 过滤条件
     * @param {Object} sorter 排序条件
     */
    loadData (pagination, filters, sorter) {
      this.localLoading = true
      const dataScope = {
      }
      sorter && sorter.field && (dataScope.sortName = BaseTool.String.underlineToHump(sorter.field))

      sorter && sorter.order && (dataScope.sortBy = sorter.order.slice(0, -3))
      const parameter = Object.assign({
        pageNum: (pagination && pagination.current) ||
            this.showPagination && this.localPagination.current || this.pageNum,
        pageSize: (pagination && pagination.pageSize) ||
            this.showPagination && this.localPagination.pageSize || this.pageSize
      },
      {
        dataScope: dataScope
      },
      {
        ...filters
      }
      )
      const result = this.data(parameter)
      // 对接自己的通用数据接口需要修改下方代码中的 r.pageNo, r.totalCount, r.data
      // eslint-disable-next-line

      if ((typeof result === 'object' || typeof result === 'function') && typeof result.then === 'function') {
        result.then(r => {
          this.localPagination = this.showPagination && Object.assign({}, this.localPagination, {
            current: r.pageNum, // 返回结果中的当前分页数
            total: r.total, // 返回结果中的总记录数
            showSizeChanger: this.showSizeChanger,
            pageSize: (pagination && pagination.pageSize) ||
              this.localPagination.pageSize
          }) || false
          // 为防止删除数据后导致页面当前页面数据长度为 0 ,自动翻页到上一页
          if (r.rows.length === 0 && this.showPagination && this.localPagination.current > 1) {
            this.localPagination.current--
            this.loadData()
            return
          }

          // 这里用于判断接口是否有返回 r.totalCount 且 this.showPagination = true 且 pageNo 和 pageSize 存在 且 totalCount 小于等于 pageNo * pageSize 的大小
          // 当情况满足时，表示数据不满足分页大小，关闭 table 分页功能
          try {
            if ((['auto', true].includes(this.showPagination) && r.totalCount <= (r.pageNum * this.localPagination.pageSize))) {
              this.localPagination.hideOnSinglePage = true
            }
          } catch (e) {
            this.localPagination = false
          }
          this.localDataSource = r.rows // 返回结果中的数组数据
          this.localLoading = false
        })
      }
    },
    initTotalList (columns) {
      const totalList = []
      columns && columns instanceof Array && columns.forEach(column => {
        if (column.needTotal) {
          totalList.push({
            ...column,
            total: 0
          })
        }
      })
      return totalList
    },
    /**
     * 用于更新已选中的列表数据 total 统计
     * @param selectedRowKeys
     * @param selectedRows
     */
    updateSelect (selectedRowKeys, selectedRows) {
      this.selectedRows = selectedRows
      this.selectedRowKeys = selectedRowKeys
      const list = this.needTotalList
      this.needTotalList = list.map(item => {
        return {
          ...item,
          total: selectedRows.reduce((sum, val) => {
            const total = sum + parseInt(get(val, item.dataIndex))
            return isNaN(total) ? 0 : total
          }, 0)
        }
      })
    },
    /**
     * 清空 table 已选中项
     */
    clearSelected () {
      if (this.rowSelection) {
        this.rowSelection.onChange([], [])
        this.updateSelect([], [])
      }
    },
    /**
     * 处理交给 table 使用者去处理 clear 事件时，内部选中统计同时调用
     * @param callback
     * @returns {*}
     */
    renderClear (callback) {
      if (this.selectedRowKeys.length <= 0) return null
      return (
        <a style="margin-left: 24px" onClick={() => {
          callback()
          this.clearSelected()
        }}>清空</a>
      )
    },
    /** myColumns
     * 处理交给 table 使用者去处理 clear 事件时，内部选中统计同时调用
     * @returns {*}
     */
    renderColumns () {
      // this.columns
      // if (this.selectedRowKeys.length <= 0) { return null }
      const checkedKeys = []
      const treeData = []
      Object.keys(this.checkCustomMap).forEach((key) => {
        const item = this.checkCustomMap[key]
        if (item.checked) {
          checkedKeys.push(item.title)
        }
        treeData.push({ title: item.title,
          key: item.title })
      })
      // const choose=this.$t('m.common.choose_show_column')
      return (
        <a style="margin-left: 24px" onClick={() => {
        }}>

          <a-popover placement="bottom">
            <template slot="content">
              <a-tree
                checkable={true}
                onCheck={(checkedKeys) => {
                  Object.keys(this.checkCustomMap).forEach((key) => {
                    const item = this.checkCustomMap[key]
                    item.checked = false
                  })
                  checkedKeys.forEach((item) => {
                    this.checkCustomMap[item].checked = true
                  })
                  // 重新渲染render ()函数
                  this.$forceUpdate()
                }}
                onSelect={(selectedKeys, info) => {
                }}
                checkedKeys={checkedKeys}
                treeData={treeData} />
            </template>
            <template slot="title">
              <span>选择显示列</span>
            </template>
            <a-icon type="appstore" />
          </a-popover>
        </a>
      )
    },
    renderAlert () {
      // 绘制统计列数据
      const needTotalItems = this.needTotalList.map((item) => {
        return (<span style="margin-right: 12px">
          {item.title}总计 <a style="font-weight: 600">{!item.customRender ? item.total : item.customRender(item.total)}</a>
        </span>)
      })

      // 绘制 清空 按钮
      const clearItem = (typeof this.alert.clear === 'boolean' && this.alert.clear) ? (
        this.renderClear(this.clearSelected)
      ) : (this.alert !== null && typeof this.alert.clear === 'function') ? (
        this.renderClear(this.alert.clear)
      ) : null
      const renderColumns = this.renderColumns()
      // const ss = this.$t('m.common.choose_total')
      // 绘制 alert 组件
      return (
        <a-alert showIcon={true} style="margin-bottom: 16px">
          <template slot="message">
            <span style="margin-right: 12px">已选择:<a style="font-weight: 600">{this.selectedRows.length}</a></span>
            {needTotalItems}
            {clearItem}
            {renderColumns}
          </template>
        </a-alert>
      )
    }
  },

  render () {
    const props = {}
    const localKeys = Object.keys(this.$data)
    const showAlert = (typeof this.alert === 'object' && this.alert !== null && this.alert.show) && typeof this.rowSelection.selectedRowKeys !== 'undefined' || this.alert
    Object.keys(T.props).forEach(k => {
      const localKey = `local${k.substring(0, 1).toUpperCase()}${k.substring(1)}`
      if (localKeys.includes(localKey)) {
        props[k] = this[localKey]
        return props[k]
      }
      if (k === 'rowSelection') {
        if (showAlert && this.rowSelection) {
          // 如果需要使用alert，则重新绑定 rowSelection 事件
          props[k] = {
            ...this.rowSelection,
            selectedRows: this.selectedRows,
            selectedRowKeys: this.selectedRowKeys,
            onChange: (selectedRowKeys, selectedRows) => {
              this.updateSelect(selectedRowKeys, selectedRows)
              typeof this[k].onChange !== 'undefined' && this[k].onChange(selectedRowKeys, selectedRows)
            }
          }
          return props[k]
        } else if (!this.rowSelection) {
          // 如果没打算开启 rowSelection 则清空默认的选择项
          props[k] = null
          return props[k]
        }
      }
      this[k] && (props[k] = this[k])
      return props[k]
    })
    const myColumns = []
    let totalWidth = 0
    Object.keys(this.checkCustomMap).forEach((key) => {
      const item = this.checkCustomMap[key]
      if (item.checked) {
        myColumns.push(item)
        const width = /^\d+/.exec(item.width)
        if (width && width.length > 0) {
          totalWidth += parseInt(width[0])
        }
      }
    })
    const x = props.scroll ? props.scroll.x : 0
    if (x && x > 0) {
      props.scroll.x = totalWidth
    }
    props.columns = myColumns
    const myClass = this.widthSpace ? 'future-table-width-space' : ''
    const table = (
      <a-table class={myClass} {...{ props, scopedSlots: { ...this.$scopedSlots } }} onChange={this.loadData}>
        { Object.keys(this.$slots).map(name => (<template slot={name}>{this.$slots[name]}</template>)) }
      </a-table>
    )

    return (
      <div class="table-wrapper">
        { showAlert ? this.renderAlert() : null }
        { table }
      </div>
    )
  }
}