wms / wms4_zhongputaicang · Files

import Menu from 'ant-design-vue/es/menu'
import Icon from 'ant-design-vue/es/icon'

const {Item, SubMenu} = Menu

export default {
  name: 'SMenu',
  props: {
    menu: {
      type: Array,
      required: true
    },
    theme: {
      type: String,
      required: false,
      default: 'dark'
    },
    mode: {
      type: String,
      required: false,
      default: 'inline'
    },
    collapsed: {
      type: Boolean,
      required: false,
      default: false
    }
  },

  data() {

    return {
      openKeys: [],
      selectedKeys: [],
      cachedOpenKeys: []
    }
  },
  computed: {
    rootSubmenuKeys: vm => {
      const keys = []
      vm.menu.forEach(item => keys.push(item.path))
      return keys
    }
  },

  mounted() {

    this.updateMenu()
  },
  watch: {

    collapsed(val) {

      if (val) {
        this.cachedOpenKeys = this.openKeys.concat()
        this.openKeys = []
      } else {
        this.openKeys = this.cachedOpenKeys
      }
    },
    $route: function () {
      this.updateMenu()
    }
  },
  methods: {
    // select menu item

    onOpenChange(openKeys) {

      // 在水平模式下时执行，并且不再执行后续
      if (this.mode === 'horizontal') {
        this.openKeys = openKeys
        return
      }
      // 非水平模式时
      const latestOpenKey = openKeys.find(key => !this.openKeys.includes(key))
      if (!this.rootSubmenuKeys.includes(latestOpenKey)) {
        this.openKeys = openKeys
      } else {
        this.openKeys = latestOpenKey ? [latestOpenKey] : []
      }
    },

    updateMenu() {

      // 解决三级菜单缓存及路由问题 start
      const routes = this.$route.meta['matched'] // 新修改，展开菜单问题
      const { hidden, selectedKeys } = this.$route.meta

      if (routes.length >= 3 && hidden) {

          routes.pop()
          this.selectedKeys = selectedKeys

      } else {

          this.selectedKeys = [routes.pop().path]

      }
      let openKeys = []
      if (this.mode === 'inline') {

          routes.forEach(item => {
            openKeys.push(item.path)
          })

      }

      // 解决三级菜单缓存及路由问题 end

      // update-begin-author:sunjianlei date:20210409 for: 修复动态功能测试菜单、带参数菜单标题错误、展开错误的问题
      // 包含冒号的是动态菜单
      if (this.selectedKeys[0].includes(':')) {
        let selectedKey = this.$route.fullPath
        this.selectedKeys = [selectedKey]
        let newOpenKeys = []
        this.fullOpenKeys(this.menu, selectedKey, newOpenKeys)
        if (newOpenKeys.length > 0) {
          openKeys = newOpenKeys.reverse()
        }
      }
      // update-end-author:sunjianlei date:20210409 for: 修复动态功能测试菜单、带参数菜单标题错误、展开错误的问题

      //update-begin-author:taoyan date:20190510 for:online表单菜单点击展开的一级目录不对

      if (!this.selectedKeys || this.selectedKeys[0].indexOf(":") < 0) {

        this.collapsed ? (this.cachedOpenKeys = openKeys) : (this.openKeys = openKeys)
      }
      //update-end-author:taoyan date:20190510 for:online表单菜单点击展开的一级目录不对
    },
    // update-begin-author:sunjianlei date:20210409 for: 修复动态功能测试菜单、带参数菜单标题错误、展开错误的问题
    // 递归查找当前选中的菜单和父级菜单，填充openKeys
    fullOpenKeys(menus, selectedKey, openKeys) {
      for (let item of menus) {
        if (item.path === selectedKey) {
          openKeys.push(item.path)
          this.$emit('updateMenuTitle', item)
          return true
        } else if (Array.isArray(item.children)) {
          if (this.fullOpenKeys(item.children, selectedKey, openKeys)) {
            openKeys.push(item.path)
            return true
          }
        }
      }
    },
    // update-end-author:sunjianlei date:20210409 for: 修复动态功能测试菜单、带参数菜单标题错误、展开错误的问题

    // render

    renderItem(menu) {

      if (!menu.hidden) {
        return menu.children && !menu.alwaysShow ? this.renderSubMenu(menu) : this.renderMenuItem(menu)
      }
      return null
    },

    renderMenuItem(menu) {

      const target = menu.meta.target || null
      const tag = target && 'a' || 'router-link'

      let props = {to: {name: menu.name}}
      if (menu.route && menu.route === '0') {
        props = {to: {path: menu.path}}

      }

      const attrs = {href: menu.path, target: menu.meta.target}

      if (menu.children && menu.alwaysShow) {
        // 把有子菜单的 并且 父菜单是要隐藏子菜单的
        // 都给子菜单增加一个 hidden 属性
        // 用来给刷新页面时， selectedKeys 做控制用
        menu.children.forEach(item => {

          item.meta = Object.assign(item.meta, {hidden: true})

        })
      }

      return (

        <Item {...{key: menu.path}}>
          <tag {...{props, attrs}}>

            {this.renderIcon(menu.meta.icon)}
            <span>{menu.meta.title}</span>
          </tag>
        </Item>
      )
    },

    renderSubMenu(menu) {

      const itemArr = []
      if (!menu.alwaysShow) {
        menu.children.forEach(item => itemArr.push(this.renderItem(item)))
      }
      return (

        <SubMenu {...{key: menu.path}}>

          <span slot="title">
            {this.renderIcon(menu.meta.icon)}
            <span>{menu.meta.title}</span>
          </span>
          {itemArr}
        </SubMenu>
      )
    },

    renderIcon(icon) {

      if (icon === 'none' || icon === undefined) {
        return null
      }
      const props = {}
      typeof (icon) === 'object' ? props.component = icon : props.type = icon
      return (

        <Icon {...{props}}/>

      )
    }
  },

  render() {
    const {mode, theme, menu} = this

    const props = {
      mode: mode,
      theme: theme,
      openKeys: this.openKeys
    }
    const on = {
      select: obj => {
        this.selectedKeys = obj.selectedKeys
        this.$emit('select', obj)
      },
      openChange: this.onOpenChange
    }

    const menuTree = menu.map(item => {
      if (item.hidden) {
        return null
      }
      return this.renderItem(item)
    })
    // {...{ props, on: on }}
    return (

      <Menu vModel={this.selectedKeys} {...{props, on: on}}>

        {menuTree}
      </Menu>
    )
  }
}