feat: add highlight for code block (#291)

* feat: add highlight for code block

* chore: update test

web/package.json

@@ -13,6 +13,7 @@
     "copy-to-clipboard": "^3.3.2",
     "dayjs": "^1.11.3",
     "emoji-picker-react": "^3.6.2",
+    "highlight.js": "^11.6.0",
     "i18next": "^21.9.2",
     "lodash-es": "^4.17.21",
     "qs": "^6.11.0",

web/src/labs/marked/marked.test.ts

@@ -9,9 +9,8 @@ describe("test marked parser", () => {
         markdown: `\`\`\`
 hello world!
 \`\`\``,
-        want: `<pre lang=''>
-hello world!
-</pre>`,
+        want: `<pre><code class="language-plaintext">hello world!
+</code></pre>`,
       },
       {
         markdown: `test code block
@@ -21,9 +20,8 @@ console.log("hello world!")
 \`\`\``,
         want: `<p>test code block</p>
 <p></p>
-<pre lang='js'>
-console.log("hello world!")
-</pre>`,
+<pre><code class="language-js"><span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(<span class="hljs-string">"hello world!"</span>)
+</code></pre>`,
       },
     ];
 

web/src/labs/marked/parser/CodeBlock.ts

@@ -1,4 +1,5 @@
 import { escape } from "lodash-es";
+import hljs from "highlight.js";
 
 export const CODE_BLOCK_REG = /^```(\S*?)\s([\s\S]*?)```(\n?)/;
 
@@ -8,7 +9,12 @@ const renderer = (rawStr: string): string => {
     return rawStr;
   }
 
-  return `<pre lang='${escape(matchResult[1])}'>\n${escape(matchResult[2])}</pre>${matchResult[3]}`;
+  const language = escape(matchResult[1]) || "plaintext";
+  const highlightedCodes = hljs.highlight(matchResult[2], {
+    language,
+  }).value;
+
+  return `<pre><code class="language-${language}">${highlightedCodes}</code></pre>${matchResult[3]}`;
 };
 
 export default {

web/src/less/memo-content.less

@@ -19,7 +19,7 @@
     }
 
     .img {
-      @apply float-left max-w-full;
+      @apply float-left max-w-full rounded cursor-pointer hover:shadow;
     }
 
     .tag-span {
@@ -48,7 +48,11 @@
     }
 
     pre {
-      @apply w-full my-1 py-2 px-3 rounded text-sm bg-gray-100 whitespace-pre-wrap;
+      @apply w-full my-1 p-3 rounded bg-gray-100 whitespace-pre-wrap;
+
+      code {
+        @apply block;
+      }
     }
 
     code {

web/src/main.tsx

@@ -4,6 +4,7 @@ import store from "./store";
 import App from "./App";
 import "./i18n";
 import "./helpers/polyfill";
+import "highlight.js/styles/github.css";
 import "./less/global.less";
 import "./css/index.css";
 

web/yarn.lock

@@ -2160,6 +2160,11 @@ has@^1.0.3:
   dependencies:
     function-bind "^1.1.1"
 
+highlight.js@^11.6.0:
+  version "11.6.0"
+  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-11.6.0.tgz#a50e9da05763f1bb0c1322c8f4f755242cff3f5a"
+  integrity sha512-ig1eqDzJaB0pqEvlPVIpSSyMaO92bH1N2rJpLMN/nX396wTpDA4Eq0uK+7I/2XG17pFaaKE0kjV/XPeGt7Evjw==
+
 hoist-non-react-statics@^3.3.0, hoist-non-react-statics@^3.3.2:
   version "3.3.2"
   resolved "https://registry.yarnpkg.com/hoist-non-react-statics/-/hoist-non-react-statics-3.3.2.tgz#ece0acaf71d62c2969c2ec59feff42a4b1a85b45"