docs: optimize code block structure (#16669)

chenxsan · web-flow · commit 4e4049c5fa35 · 2022-12-29T01:56:23.000+05:30
* docs: optimize code block structure * docs: fix ui for firefox * docs: fix highlighter * fix: do not escape text code * Revert "fix: do not escape text code" This reverts commit 0e5c31e.
diff --git a/docs/.eleventy.js b/docs/.eleventy.js
@@ -10,7 +10,7 @@ const Image = require("@11ty/eleventy-img");
 const path = require("path");
 const { slug } = require("github-slugger");
 const yaml = require("js-yaml");
-const { highlighter, preWrapperPlugin, lineNumberPlugin } = require("./src/_plugins/md-syntax-highlighter");
+const { highlighter, lineNumberPlugin } = require("./src/_plugins/md-syntax-highlighter");
 const {
     DateTime
 } = require("luxon");
@@ -208,7 +208,6 @@ module.exports = function(eleventyConfig) {
                 return generateAlertMarkup("important", tokens, idx);
             }
         })
-        .use(preWrapperPlugin)
         .use(lineNumberPlugin)
         .disable("code");
 
diff --git a/docs/src/_plugins/md-syntax-highlighter.js b/docs/src/_plugins/md-syntax-highlighter.js
@@ -32,7 +32,7 @@ const loadLanguages = require("prismjs/components/");
  * @param {MarkdownIt} md markdown-it
  * @param {string} str code
  * @param {string} lang code language
- * @returns
+ * @returns {string} highlighted result wrapped in pre
  */
 const highlighter = function (md, str, lang) {
     let result = "";
@@ -41,29 +41,15 @@ const highlighter = function (md, str, lang) {
             loadLanguages([lang]);
             result = Prism.highlight(str, Prism.languages[lang], lang);
         } catch (err) {
-            console.log(err);
+            console.log(lang, err);
+            // we still want to wrap the result later
+            result = md.utils.escapeHtml(str);
         }
     } else {
         result = md.utils.escapeHtml(str);
     }
 
-    return `<pre><code>${result}</code></pre>`;
-};
-
-/**
- *
- * modified from https://github.com/vuejs/vitepress/blob/main/src/node/markdown/plugins/preWrapper.ts
- * @param {MarkdownIt} md
- * @license MIT License. See file header.
- */
-const preWrapperPlugin = (md) => {
-    const fence = md.renderer.rules.fence;
-    md.renderer.rules.fence = (...args) => {
-        const [tokens, idx] = args;
-        const lang = tokens[idx].info.trim();
-        const rawCode = fence(...args);
-        return `<div class="language-${lang}">${rawCode}</div>`;
-    };
+    return `<pre class="language-${lang}"><code>${result}</code></pre>`;
 };
 
 /**
@@ -93,15 +79,13 @@ const lineNumberPlugin = (md) => {
         const lineNumbersWrapperCode = `<div class="line-numbers-wrapper" aria-hidden="true">${lineNumbersCode}</div>`;
 
         const finalCode = rawCode
-            .replace(/<\/div>$/, `${lineNumbersWrapperCode}</div>`)
+            .replace(/<\/pre>\n/, `${lineNumbersWrapperCode}</pre>`)
             .replace(/"(language-\S*?)"/, '"$1 line-numbers-mode"')
             .replace(/<code>/, `<code class="language-${lang}">`)
-            .replace(/<pre>/, `<pre class="language-${lang}">`);
 
         return finalCode;
     };
 };
 
 module.exports.highlighter = highlighter;
-module.exports.preWrapperPlugin = preWrapperPlugin;
 module.exports.lineNumberPlugin = lineNumberPlugin;
diff --git a/docs/src/assets/scss/syntax-highlighter.scss b/docs/src/assets/scss/syntax-highlighter.scss
@@ -32,7 +32,7 @@ pre[class*="language-"] {
 }
 
 /* Code blocks */
-div[class*="language-"] {
+pre[class*="language-"] {
     padding: 1.5rem;
     margin: 1.5rem 0;
     overflow: auto;
@@ -43,6 +43,10 @@ div[class*="language-"] {
     [data-theme="dark"] & {
         color: var(--color-neutral-100);
     }
+
+    &.line-numbers-mode {
+        padding-left: calc(1.5rem + 2.4em + 1.2rem);
+    }
 }
 
 :not(pre) > code[class*="language-"],
@@ -103,29 +107,21 @@ pre[class*="language-"] {
 .line-numbers-wrapper {
     position: absolute;
     top: 0;
+    left: 1.5rem;
     text-align: right;
     padding-top: 1.5rem;
     font-size: 1em;
     font-family: var(--mono-font), Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
     line-height: 1.5;
     color: var(--icon-color);
-}
-
-.line-number {
-    user-select: none;
-    color: var(--icon-color);
-    display: inline-block;
-    font-variant-numeric: tabular-nums;
-    text-align: right;
-    width: 1.2em;
-}
-
-div[class*="language-"].line-numbers-mode {
-    position: relative;
+    font-variant-ligatures: none;
 
-    pre[class*="language-"] {
-        padding-left: calc(2.4em + 1.2rem);
-        margin-top: 0;
-        margin-bottom: 0;
+    .line-number {
+        user-select: none;
+        color: var(--icon-color);
+        display: inline-block;
+        font-variant-numeric: tabular-nums;
+        text-align: right;
+        width: 1.2em;
     }
 }
