增加复制代码功能

frontend/src/components/Preview.vue

@@ -58,6 +58,7 @@ import LinkTargetPlugin from '../plugins/LinkTargetPlugin'
 import DrawioPlugin from '../plugins/DrawioPlugin'
 import PlantumlPlugin from '../plugins/PlantumlPlugin'
 import MermaidPlugin from '../plugins/MermaidPlugin'
+import CodePlugin from '../plugins/CodePlugin'
 import file from '@/lib/file'
 import env from '@/lib/env'
 import { encodeMarkdownLink } from '@/lib/utils'
@@ -94,6 +95,7 @@ const markdown = Markdown({
   .use(MarkdownItToc)
   .use(MarkdownItECharts)
   .use(MermaidPlugin)
+  .use(CodePlugin)
 
 export default {
   name: 'xview',

frontend/src/plugins/CodePlugin.js

@@ -0,0 +1,12 @@
+export default (md) => {
+  const Fun = fn => (tokens, idx, options, env, slf) => {
+    if (tokens[idx].attrIndex('title') < 0) {
+      tokens[idx].attrPush(['title', 'Ctrl + 单击复制代码'])
+      tokens[idx].attrPush(['onclick', `event.ctrlKey && window.appVm.$bus.emit('copy-text', this.innerText)`])
+    }
+
+    return (fn)(tokens, idx, options, env, slf)
+  }
+
+  md.renderer.rules.code_inline = Fun(md.renderer.rules.code_inline.bind(md.renderer.rules))
+}