SpringBlade 标签页

代码位置

代码说明（一部分）

<template>

  <!-- tag 标签页容器 -->
  <div class="avue-tags"
       v-if="showTag">

    <!-- 右键菜单 -->
    <div v-if="contextmenuFlag"
         class="avue-tags__contentmenu"
         :style="{left:contentmenuX+'px',top:contentmenuY+'px'}">
      <!-- 关闭其他 -->
      <div class="item"
           @click="closeOthersTags">{{$t('tagsView.closeOthers')}}</div>
      <!-- 关闭所有 -->
      <div class="item"
           @click="closeAllTags">{{$t('tagsView.closeAll')}}</div>
    </div>


    <!-- 首页是否可被关闭，读取 config/website.js 中的 isFirstPage 属性来判断 -->
    <div class="avue-tags__box"
         :class="{'avue-tags__box--close':!website.isFirstPage}">

      <!-- 标签页必须留一个，在closable中判断的 -->
      <el-tabs v-model="active"
               type="card"
               @contextmenu.native="handleContextmenu"
               :closable="tagLen!==1"
               @tab-click="openTag"
               @edit="menuTag">

        <!-- 遍历tagList，生成标签页 -->
        <el-tab-pane :key="item.value"
                     v-for="item in tagList"
                     :label="generateTitle(item)"
                     :name="item.value">
        </el-tab-pane>
      </el-tabs>


      <!-- 这里感觉好像没用给 -->
      <el-dropdown class="avue-tags__menu">
        <el-button type="primary"
                   size="mini">
          {{$t('tagsView.menu')}}
          <i class="el-icon-arrow-down el-icon--right"></i>
        </el-button>
        <el-dropdown-menu slot="dropdown">
          <el-dropdown-item @click.native="closeOthersTags">{{$t('tagsView.closeOthers')}}</el-dropdown-item>
          <el-dropdown-item @click.native="closeAllTags">{{$t('tagsView.closeAll')}}</el-dropdown-item>
        </el-dropdown-menu>
      </el-dropdown>

    </div>

  </div>
</template>
<script>
import { mapGetters, mapState } from "vuex";
export default {
  name: "tags",
  data() {
    return {
      active: "",
      contentmenuX: "",
      contentmenuY: "",
      contextmenuFlag: false
    };
  },
  created() {},
  mounted() {
    this.setActive();
  },
  watch: {
    tag() {
      this.setActive();
    },
    contextmenuFlag() {
      window.addEventListener("mousedown", this.watchContextmenu);
    }
  },
  computed: {
    ...mapGetters(["tagWel", "tagList", "tag", "website"]),
    ...mapState({
      showTag: state => state.common.showTag
    }),
    tagLen() {
      return this.tagList.length || 0;
    }
  },
  methods: {
    generateTitle(item) {
      //这里的数据是：标签页的标题数据
      //不知道为什么这里的数据被执行了两次
      return this.$router.$avueRouter.generateTitle(
        item.label,
        (item.meta || {}).i18n
      );
    },
    watchContextmenu(event) {
      if (!this.$el.contains(event.target) || event.button !== 0) {
        this.contextmenuFlag = false;
      }
      window.removeEventListener("mousedown", this.watchContextmenu);
    },
    handleContextmenu(event) {
      let target = event.target;
      // 解决 https://github.com/d2-projects/d2-admin/issues/54
      let flag = false;
      if (target.className.indexOf("el-tabs__item") > -1) flag = true;
      else if (target.parentNode.className.indexOf("el-tabs__item") > -1) {
        target = target.parentNode;
        flag = true;
      }
      if (flag) {
        event.preventDefault();
        event.stopPropagation();
        this.contentmenuX = event.clientX;
        this.contentmenuY = event.clientY;
        this.tagName = target.getAttribute("aria-controls").slice(5);
        this.contextmenuFlag = true;
      }
    },
    //激活当前选项
    setActive() {
      this.active = this.tag.value;
    },
    menuTag(value, action) {
      if (action === "remove") {
        let { tag, key } = this.findTag(value);
        this.$store.commit("DEL_TAG", tag);
        if (tag.value === this.tag.value) {
          tag = this.tagList[key === 0 ? key : key - 1]; //如果关闭本标签让前推一个
          this.openTag(tag);
        }
      }
    },
    openTag(item) {
      let tag;
      if (item.name) {
        tag = this.findTag(item.name).tag;
      } else {
        tag = item;
      }
      this.$router.push({
        path: this.$router.$avueRouter.getPath({
          name: tag.label,
          src: tag.value,
          i18n: tag.meta.i18n
        }),
        query: tag.query
      });
    },
    closeOthersTags() {
      this.contextmenuFlag = false;
      this.$store.commit("DEL_TAG_OTHER");
    },
    findTag(value) {
      let tag, key;
      this.tagList.map((item, index) => {
        if (item.value === value) {
          tag = item;
          key = index;
        }
      });
      return { tag: tag, key: key };
    },
    closeAllTags() {
      this.contextmenuFlag = false;
      this.$store.commit("DEL_ALL_TAG");
      this.$router.push({
        path: this.$router.$avueRouter.getPath({
          src: this.tagWel.value
        }),
        query: this.tagWel.query
      });
    }
  }
};
</script>