1.tags过多时，显示滚动条(不可按住滑动)

2.右键tags显示关闭多个tag的菜单
3.优化scrollPane滚轮滚动，计算偏移量的逻辑

src/components/ScrollPane/index.vue

@@ -3,69 +3,114 @@
     <div class="scroll-wrapper" ref="scrollWrapper" :style="{left: left + 'px'}">
       <slot></slot>
     </div>
+    <div class="bar-container" v-show="isOverflow" ref="scrollbarContainer">
+      <div class="scrollbar" ref="scrollbar">
+      </div>
+    </div>
   </div>
 </template>
 
 <script>
-const padding = 15 // tag's padding
+  const padding = 30 // tag's padding
 
-export default {
+  export default {
     name: 'scrollPane',
     data() {
       return {
-      left: 0
+        left: 0,
+        isOverflow: false,
+        container: undefined,
+        containerWidth: undefined,
+        wrapper: undefined,
+        wrapperWidth: undefined,
+        scrollbarContainer: undefined,
+        scrollbarContainerWidth: undefined,
+        scrollbar: undefined,
+        scrollbarWidth: undefined
       }
     },
+    mounted() {
+      this.container = this.$refs.scrollContainer
+      this.wrapper = this.$refs.scrollWrapper
+      this.scrollbarContainer = this.$refs.scrollbarContainer
+      this.scrollbar = this.$refs.scrollbar
+      this.calcSize()
+      window.addEventListener('resize', () => {
+        this.$forceUpdate()
+        this.calcSize()
+      }, false)
+    },
     methods: {
-    handleScroll(e) {
+      calcPos() {
-      e.preventDefault()
+        if (this.isOverflow) {
-      const $container = this.$refs.scrollContainer
+          this.scrollbar.style.left = -(this.scrollbarContainerWidth - this.scrollbarWidth) * this.left / (this.wrapperWidth - this.containerWidth + padding) + 'px'
-      const $containerWidth = $container.offsetWidth
-      const $wrapper = this.$refs.scrollWrapper
-      const $wrapperWidth = $wrapper.offsetWidth
-
-      if (e.wheelDelta > 0) {
-        this.left = Math.min(0, this.left + e.wheelDelta)
-      } else {
-        if ($containerWidth - padding < $wrapperWidth) {
-          if (this.left < -($wrapperWidth - $containerWidth + padding)) {
-            this.left = this.left
-          } else {
-            this.left = Math.max(this.left + e.wheelDelta, $containerWidth - $wrapperWidth - padding)
-          }
-        } else {
-          this.left = 0
-        }
         }
       },
+      calcSize() {
+        // 计算滚动条的长度
+        this.containerWidth = parseFloat(this.container.offsetWidth, 10)
+        this.wrapperWidth = parseFloat(this.wrapper.offsetWidth, 10)
+        this.scrollbarContainerWidth = parseFloat(this.scrollbarContainer.offsetWidth, 10)
+        this.isOverflow = this.wrapperWidth + padding > this.containerWidth
+        if (!this.isOverflow) return false
+        this.scrollbarWidth = this.scrollbarContainerWidth * this.containerWidth / (this.wrapperWidth + padding)
+        this.scrollbar.style.width = this.scrollbarWidth + 'px'
+        this.calcPos()
+      },
+      handleScroll(e) {
+        e.preventDefault()
+        if (e.wheelDelta > 0) {
+          // when whell up
+          this.left = Math.min(0, this.left + e.wheelDelta)
+        } else {
+          // when wheel down
+          // this.left∈[-(this.wrapperWidth-this.containerWidth+100),0]
+          if (this.left >= -(this.wrapperWidth - this.containerWidth + padding)) {
+            this.left = Math.max(this.left + e.wheelDelta, this.containerWidth - this.wrapperWidth - padding)
+          }
+        }
+        this.calcPos()
+      },
       moveToTarget($target) {
-      const $container = this.$refs.scrollContainer
-      const $containerWidth = $container.offsetWidth
         const $targetLeft = $target.offsetLeft
         const $targetWidth = $target.offsetWidth
 
         if ($targetLeft < -this.left) {
           // tag in the left
           this.left = -$targetLeft + padding
-      } else if ($targetLeft + padding > -this.left && $targetLeft + $targetWidth < -this.left + $containerWidth - padding) {
+        } else if ($targetLeft + padding > -this.left && $targetLeft + $targetWidth < -this.left + this.containerWidth - padding) {
           // tag in the current view
           // eslint-disable-line
         } else {
           // tag in the right
-        this.left = -($targetLeft - ($containerWidth - $targetWidth) + padding)
+          this.left = -($targetLeft - (this.containerWidth - $targetWidth) + padding)
+        }
+        this.calcSize()
       }
     }
   }
-}
 </script>
 
 <style rel="stylesheet/scss" lang="scss" scoped>
-.scroll-container {
+  .scroll-container {
     white-space: nowrap;
     position: relative;
     overflow: hidden;
     .scroll-wrapper {
       position: absolute;
     }
-}
+    .bar-container{
+      position: absolute;
+      bottom: 0;
+      width:100%;
+      height: 3px;
+      .scrollbar{
+        position: absolute;
+        top: 0;
+        height: 100%;
+        background: rgba(0,0,0,.8);
+        border-radius: 1.5px;
+      }
+    }
+  }
 </style>

src/store/modules/tagsView.js

@@ -29,6 +29,25 @@ const tagsView = {
           break
         }
       }
+    },
+    DEL_OTHER_VIEWS: (state, view) => {
+      for (const [i, v] of state.visitedViews.entries()) {
+        if (v.path === view.path) {
+          state.visitedViews = [].concat(state.visitedViews.slice(i, i + 1))
+          break
+        }
+      }
+      for (const i of state.cachedViews) {
+        if (i === view.name) {
+          const index = state.cachedViews.indexOf(i)
+          state.cachedViews = [].concat(state.cachedViews.slice(index, i + 1))
+          break
+        }
+      }
+    },
+    DEL_ALL_VIEWS: (state) => {
+      state.visitedViews = []
+      state.cachedViews = []
     }
   },
   actions: {
@@ -40,6 +59,18 @@ const tagsView = {
         commit('DEL_VISITED_VIEWS', view)
         resolve([...state.visitedViews])
       })
+    },
+    delOtherViews({ commit, state }, view) {
+      return new Promise((resolve) => {
+        commit('DEL_OTHER_VIEWS', view)
+        resolve([...state.visitedViews])
+      })
+    },
+    delAllViews({ commit, state }) {
+      return new Promise((resolve) => {
+        commit('DEL_ALL_VIEWS')
+        resolve([...state.visitedViews])
+      })
     }
   }
 }

src/views/layout/components/TagsView.vue

@@ -1,18 +1,36 @@
 <template>
+  <div class="tag-container">
     <scroll-pane class='tags-view-container' ref='scrollPane'>
-    <router-link ref='tag' class="tags-view-item" :class="isActive(tag)?'active':''" v-for="tag in Array.from(visitedViews)" :to="tag.path":key="tag.path">
+      <router-link ref='tag' class="tags-view-item" :class="isActive(tag)?'active':''" v-for="tag in Array.from(visitedViews)" :to="tag.path":key="tag.path" @contextmenu.prevent.native="openMenu(tag,$event)" v-Clickoutside="closeMenu">
         {{generateTitle(tag.title)}}
         <span class='el-icon-close' @click='closeViewTags(tag,$event)'></span>
       </router-link>
     </scroll-pane>
+    <ul class='contextmenu' v-show="open" :style="{left:left+'px',top:top+'px'}">
+      <li @click="closePage(0,$event)">关闭</li>
+      <li @click="closePage(1,$event)">关闭其他</li>
+      <li @click="closePage(2,$event)">关闭所有</li>
+    </ul>
+  </div>
 </template>
 
 <script>
 import ScrollPane from '@/components/ScrollPane'
+import Clickoutside from 'element-ui/src/utils/clickoutside'
 import { generateTitle } from '@/utils/i18n'
 
 export default {
   components: { ScrollPane },
+  directives: { Clickoutside },
+  data() {
+    return {
+      open: false,
+      isOverflow: false,
+      top: 0,
+      left: 0,
+      isSelect: {}
+    }
+  },
   computed: {
     visitedViews() {
       return this.$store.state.tagsView.visitedViews
@@ -21,6 +39,9 @@ export default {
   mounted() {
     this.addViewTags()
   },
+  updated() {
+    this.$nextTick(this.$refs.scrollPane.calcSize())
+  },
   methods: {
     generateTitle,
     closeViewTags(view, $event) {
@@ -36,6 +57,20 @@ export default {
       })
       $event.preventDefault()
     },
+    closePage(flag, $event) {
+      if (flag === 0) {
+        this.closeViewTags(this.isSelect, $event)
+      } else if (flag === 1) {
+        this.$router.push(this.isSelect.path)
+        this.$store.dispatch('delOtherViews', this.isSelect)
+        $event.preventDefault()
+      } else {
+        this.$router.push('/')
+        this.$store.dispatch('delAllViews')
+        $event.preventDefault()
+      }
+      this.open = false
+    },
     generateRoute() {
       if (this.$route.name) {
         return this.$route
@@ -62,6 +97,15 @@ export default {
           }
         }
       })
+    },
+    openMenu(tag, e) {
+      this.open = true
+      this.isSelect = tag
+      this.left = e.clientX
+      this.top = e.clientY
+    },
+    closeMenu() {
+      this.open = false
     }
   },
   watch: {
@@ -74,7 +118,27 @@ export default {
 </script>
 
 <style rel="stylesheet/scss" lang="scss" scoped>
-.tags-view-container {
+  .tag-container {
+    .contextmenu {
+      margin: 0;
+      background: #fff;
+      z-index: 99999;
+      position: absolute;
+      list-style-type: none;
+      padding-left: 0;
+      border: 1px solid rgba(0, 0, 0, 0.4);
+      font-size: 0.8rem;
+      box-shadow: 2px 2px 3px 0 rgba(0, 0, 0, .5);
+      li {
+        margin: 0;
+        padding: 0.2rem 1.5rem 0.3rem 0.8rem;
+        &:hover {
+          background: #eee;
+          cursor: default;
+        }
+      }
+    }
+    .tags-view-container {
       background: #fff;
       height: 34px;
       border-bottom: 1px solid #d8dce5;
@@ -110,7 +174,8 @@ export default {
           }
         }
       }
-}
+    }
+  }
 </style>
 
 <style rel="stylesheet/scss" lang="scss">