增加预览代码全选和复制

web/src/view/systemTools/autoCode/component/previewCodeDialg.vue

 <template>
-    <div class="previewCode">
-        <el-tabs v-model="activeName">
-            <el-tab-pane :label="key" :name="key" v-for="(item,key) in previewCode" :key="key">
-                <div style="background:#fff;padding:0 20px" :id="key"></div>
-            </el-tab-pane>
-        </el-tabs>
+  <div class="previewCode">
+    <div class="previewCodeTool">
+      <p>操作栏：</p>
+      <el-button @click="selectText">全选</el-button>
+      <el-button @click="copy">复制</el-button>
     </div>
+    <el-tabs v-model="activeName">
+      <el-tab-pane :label="key" :name="key" v-for="(item, key) in previewCode" :key="key">
+        <div class="tab-info" :id="key"></div>
+      </el-tab-pane>
+    </el-tabs>
+  </div>
 </template>
 
 <script>
-import marked from "marked"
+import marked from "marked";
 import hljs from "highlight.js";
 // import 'highlight.js/styles/atelier-cave-light.css';
-import 'highlight.js/styles/atelier-plateau-light.css';
+import "highlight.js/styles/atelier-plateau-light.css";
 export default {
-    props:{
-        previewCode:{
-            type:Object,
-            default(){
-                return {}
-            }
-        }
+  props: {
+    previewCode: {
+      type: Object,
+      default() {
+        return {};
+      },
     },
-    data(){
-        return{
-             activeName: "",
-        }
+  },
+  data() {
+    return {
+      activeName: "",
+    };
+  },
+  methods: {
+    selectText() {
+      const element = document.getElementById(this.activeName);
+      if (document.body.createTextRange) {
+        let range = document.body.createTextRange();
+        range.moveToElementText(element);
+        range.select();
+      } else if (window.getSelection) {
+        let selection = window.getSelection();
+        let range = document.createRange();
+        range.selectNodeContents(element);
+        selection.removeAllRanges();
+        selection.addRange(range);
+      } else {
+        alert("none");
+      }
     },
-    mounted(){
-        marked.setOptions({
-          renderer: new marked.Renderer(),
-          highlight: function(code) {
-            return hljs.highlightAuto(code).value;
-          },
-          pedantic: false,
-          gfm: true,
-          tables: true,
-          breaks: false,
-          sanitize: false,
-          smartLists: true,
-          smartypants: false,
-          xhtml: false
-        }
-      );
-        for(const key in this.previewCode){
-            if(this.activeName == ""){
-                this.activeName = key
-            }
-            document.getElementById(key).innerHTML = marked(this.previewCode[key])
-        }
+    copy() {
+      this.selectText();
+      document.execCommand("copy");
+      this.$message.success("复制成功");
+    },
+  },
+  mounted() {
+    marked.setOptions({
+      renderer: new marked.Renderer(),
+      highlight: function (code) {
+        return hljs.highlightAuto(code).value;
+      },
+      pedantic: false,
+      gfm: true,
+      tables: true,
+      breaks: false,
+      sanitize: false,
+      smartLists: true,
+      smartypants: false,
+      xhtml: false,
+    });
+    for (const key in this.previewCode) {
+      if (this.activeName == "") {
+        this.activeName = key;
+      }
+      document.getElementById(key).innerHTML = marked(this.previewCode[key]);
     }
-}
+  },
+};
 </script>
 
 <style lang="scss">
-    
-</style>
\ No newline at end of file
+.previewCode {
+  .previewCodeTool {
+    display: flex;
+    align-items: center;
+    padding: 5px 0;
+    margin-top: -40px;
+  }
+  .tab-info {
+    height: 50vh;
+    background: #fff;
+    padding: 0 20px;
+    overflow-y: scroll;
+  }
+}
+</style>