From 4f0108b0eaa3fb1f06e3227c7f3ae9d22306621a Mon Sep 17 00:00:00 2001
From: Yifei Zhang <yidadaa@qq.com>
Date: Sun, 2 Apr 2023 14:48:18 +0000
Subject: [PATCH] fix: #289 use highlight.js instead of prism

---
 app/components/markdown.tsx |  38 ++++++++++-
 app/layout.tsx              |   2 +-
 app/styles/globals.scss     |   1 +
 app/styles/highlight.scss   | 114 +++++++++++++++++++++++++++++++++
 app/styles/prism.scss       | 122 ------------------------------------
 package.json                |   2 +-
 yarn.lock                   |  39 +++++++++++-
 7 files changed, 190 insertions(+), 128 deletions(-)
 create mode 100644 app/styles/highlight.scss
 delete mode 100644 app/styles/prism.scss

diff --git a/app/components/markdown.tsx b/app/components/markdown.tsx
index 6d3cd0bf..89492612 100644
--- a/app/components/markdown.tsx
+++ b/app/components/markdown.tsx
@@ -4,8 +4,8 @@ import RemarkMath from "remark-math";
 import RemarkBreaks from "remark-breaks";
 import RehypeKatex from "rehype-katex";
 import RemarkGfm from "remark-gfm";
-import RehypePrsim from "rehype-prism-plus";
-import { useRef } from "react";
+import RehypeHighlight from "rehype-highlight";
+import { useRef, useState, RefObject, useEffect } from "react";
 import { copyToClipboard } from "../utils";
 
 export function PreCode(props: { children: any }) {
@@ -27,11 +27,43 @@ export function PreCode(props: { children: any }) {
   );
 }
 
+const useLazyLoad = (ref: RefObject<Element>): boolean => {
+  const [isIntersecting, setIntersecting] = useState<boolean>(false);
+
+  useEffect(() => {
+    const observer = new IntersectionObserver(([entry]) => {
+      if (entry.isIntersecting) {
+        setIntersecting(true);
+        observer.disconnect();
+      }
+    });
+
+    if (ref.current) {
+      observer.observe(ref.current);
+    }
+
+    return () => {
+      observer.disconnect();
+    };
+  }, [ref]);
+
+  return isIntersecting;
+};
+
 export function Markdown(props: { content: string }) {
   return (
     <ReactMarkdown
       remarkPlugins={[RemarkMath, RemarkGfm, RemarkBreaks]}
-      rehypePlugins={[RehypeKatex, [RehypePrsim, { ignoreMissing: true }]]}
+      rehypePlugins={[
+        RehypeKatex,
+        [
+          RehypeHighlight,
+          {
+            detect: true,
+            ignoreMissing: true,
+          },
+        ],
+      ]}
       components={{
         pre: PreCode,
       }}
diff --git a/app/layout.tsx b/app/layout.tsx
index 32d3576c..6b6999f8 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -1,7 +1,7 @@
 /* eslint-disable @next/next/no-page-custom-font */
 import "./styles/globals.scss";
 import "./styles/markdown.scss";
-import "./styles/prism.scss";
+import "./styles/highlight.scss";
 import process from "child_process";
 import { ACCESS_CODES, IS_IN_DOCKER } from "./api/access";
 
diff --git a/app/styles/globals.scss b/app/styles/globals.scss
index 6637016a..e14ee684 100644
--- a/app/styles/globals.scss
+++ b/app/styles/globals.scss
@@ -235,6 +235,7 @@ pre {
   .copy-code-button {
     position: absolute;
     right: 10px;
+    top: 1em;
     cursor: pointer;
     padding: 0px 5px;
     background-color: var(--black);
diff --git a/app/styles/highlight.scss b/app/styles/highlight.scss
new file mode 100644
index 00000000..f1314a26
--- /dev/null
+++ b/app/styles/highlight.scss
@@ -0,0 +1,114 @@
+.markdown-body {
+  pre {
+    padding: 0;
+  }
+
+  pre,
+  code {
+    font-family: Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
+  }
+
+  pre code.hljs {
+    display: block;
+    overflow-x: auto;
+    padding: 1em;
+  }
+
+  code.hljs {
+    padding: 3px 5px;
+  }
+
+  /*!
+  Theme: Tokyo-night-Dark
+  origin: https://github.com/enkia/tokyo-night-vscode-theme
+  Description: Original highlight.js style
+  Author: (c) Henri Vandersleyen <hvandersleyen@gmail.com>
+  License: see project LICENSE
+  Touched: 2022
+*/
+  .hljs-comment,
+  .hljs-meta {
+    color: #565f89;
+  }
+
+  .hljs-deletion,
+  .hljs-doctag,
+  .hljs-regexp,
+  .hljs-selector-attr,
+  .hljs-selector-class,
+  .hljs-selector-id,
+  .hljs-selector-pseudo,
+  .hljs-tag,
+  .hljs-template-tag,
+  .hljs-variable.language_ {
+    color: #f7768e;
+  }
+
+  .hljs-link,
+  .hljs-literal,
+  .hljs-number,
+  .hljs-params,
+  .hljs-template-variable,
+  .hljs-type,
+  .hljs-variable {
+    color: #ff9e64;
+  }
+
+  .hljs-attribute,
+  .hljs-built_in {
+    color: #e0af68;
+  }
+
+  .hljs-keyword,
+  .hljs-property,
+  .hljs-subst,
+  .hljs-title,
+  .hljs-title.class_,
+  .hljs-title.class_.inherited__,
+  .hljs-title.function_ {
+    color: #7dcfff;
+  }
+
+  .hljs-selector-tag {
+    color: #73daca;
+  }
+
+  .hljs-addition,
+  .hljs-bullet,
+  .hljs-quote,
+  .hljs-string,
+  .hljs-symbol {
+    color: #9ece6a;
+  }
+
+  .hljs-code,
+  .hljs-formula,
+  .hljs-section {
+    color: #7aa2f7;
+  }
+
+  .hljs-attr,
+  .hljs-char.escape_,
+  .hljs-keyword,
+  .hljs-name,
+  .hljs-operator {
+    color: #bb9af7;
+  }
+
+  .hljs-punctuation {
+    color: #c0caf5;
+  }
+
+  .hljs {
+    background: #1a1b26;
+    color: #9aa5ce;
+  }
+
+  .hljs-emphasis {
+    font-style: italic;
+  }
+
+  .hljs-strong {
+    font-weight: 700;
+  }
+}
diff --git a/app/styles/prism.scss b/app/styles/prism.scss
deleted file mode 100644
index 65ee8b5f..00000000
--- a/app/styles/prism.scss
+++ /dev/null
@@ -1,122 +0,0 @@
-.markdown-body {
-  pre {
-    background: #282a36;
-    color: #f8f8f2;
-  }
-
-  code[class*="language-"],
-  pre[class*="language-"] {
-    color: #f8f8f2;
-    background: none;
-    text-shadow: 0 1px rgba(0, 0, 0, 0.3);
-    font-family: Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
-    text-align: left;
-    white-space: pre;
-    word-spacing: normal;
-    word-break: normal;
-    word-wrap: normal;
-    line-height: 1.5;
-    -moz-tab-size: 4;
-    -o-tab-size: 4;
-    tab-size: 4;
-    -webkit-hyphens: none;
-    -moz-hyphens: none;
-    -ms-hyphens: none;
-    hyphens: none;
-  }
-
-  /* Code blocks */
-  pre[class*="language-"] {
-    padding: 1em;
-    margin: 0.5em 0;
-    overflow: auto;
-    border-radius: 0.3em;
-  }
-
-  :not(pre) > code[class*="language-"],
-  pre[class*="language-"] {
-    background: #282a36;
-  }
-
-  /* Inline code */
-  :not(pre) > code[class*="language-"] {
-    padding: 0.1em;
-    border-radius: 0.3em;
-    white-space: normal;
-  }
-
-  .token.comment,
-  .token.prolog,
-  .token.doctype,
-  .token.cdata {
-    color: #6272a4;
-  }
-
-  .token.punctuation {
-    color: #f8f8f2;
-  }
-
-  .namespace {
-    opacity: 0.7;
-  }
-
-  .token.property,
-  .token.tag,
-  .token.constant,
-  .token.symbol,
-  .token.deleted {
-    color: #ff79c6;
-  }
-
-  .token.boolean,
-  .token.number {
-    color: #bd93f9;
-  }
-
-  .token.selector,
-  .token.attr-name,
-  .token.string,
-  .token.char,
-  .token.builtin,
-  .token.inserted {
-    color: #50fa7b;
-  }
-
-  .token.operator,
-  .token.entity,
-  .token.url,
-  .language-css .token.string,
-  .style .token.string,
-  .token.variable {
-    color: #f8f8f2;
-  }
-
-  .token.atrule,
-  .token.attr-value,
-  .token.function,
-  .token.class-name {
-    color: #f1fa8c;
-  }
-
-  .token.keyword {
-    color: #8be9fd;
-  }
-
-  .token.regex,
-  .token.important {
-    color: #ffb86c;
-  }
-
-  .token.important,
-  .token.bold {
-    font-weight: bold;
-  }
-
-  .token.italic {
-    font-style: italic;
-  }
-
-  .token.entity {
-    cursor: help;
-  }
-}
diff --git a/package.json b/package.json
index b67d7b0d..2e018647 100644
--- a/package.json
+++ b/package.json
@@ -24,8 +24,8 @@
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-markdown": "^8.0.5",
+    "rehype-highlight": "^6.0.0",
     "rehype-katex": "^6.0.2",
-    "rehype-prism-plus": "^1.5.1",
     "remark-breaks": "^3.0.2",
     "remark-gfm": "^3.0.1",
     "remark-math": "^5.1.1",
diff --git a/yarn.lock b/yarn.lock
index 246b818b..fd26bb00 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2548,6 +2548,13 @@ fastq@^1.6.0:
   dependencies:
     reusify "^1.0.4"
 
+fault@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/fault/-/fault-2.0.1.tgz#d47ca9f37ca26e4bd38374a7c500b5a384755b6c"
+  integrity sha512-WtySTkS4OKev5JtpHXnib4Gxiurzh5NCGvWrFaZ34m6JehfTUhKZvn9njTfw48t6JumVQOmrKqpmGcdwxnhqBQ==
+  dependencies:
+    format "^0.2.0"
+
 fetch-blob@^3.1.2, fetch-blob@^3.1.4:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/fetch-blob/-/fetch-blob-3.2.0.tgz#f09b8d4bbd45adc6f0c20b7e787e793e309dcce9"
@@ -2612,6 +2619,11 @@ form-data@^4.0.0:
     combined-stream "^1.0.8"
     mime-types "^2.1.12"
 
+format@^0.2.0:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/format/-/format-0.2.2.tgz#d6170107e9efdc4ed30c9dc39016df942b5cb58b"
+  integrity sha512-wzsgA6WOq+09wrU1tsJ09udeR/YZRaeArL9e1wPbFg3GG2yDnC2ldKpxs4xunpFF9DgqCqOIra3bc1HWrJ37Ww==
+
 formdata-polyfill@^4.0.10:
   version "4.0.10"
   resolved "https://registry.yarnpkg.com/formdata-polyfill/-/formdata-polyfill-4.0.10.tgz#24807c31c9d402e002ab3d8c720144ceb8848423"
@@ -2874,7 +2886,7 @@ hast-util-to-string@^2.0.0:
   dependencies:
     "@types/hast" "^2.0.0"
 
-hast-util-to-text@^3.1.0:
+hast-util-to-text@^3.0.0, hast-util-to-text@^3.1.0:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/hast-util-to-text/-/hast-util-to-text-3.1.2.tgz#ecf30c47141f41e91a5d32d0b1e1859fd2ac04f2"
   integrity sha512-tcllLfp23dJJ+ju5wCCZHVpzsQQ43+moJbqVX3jNWPB7z/KFC4FyZD6R7y94cHL6MQ33YtMZL8Z0aIXXI4XFTw==
@@ -2900,6 +2912,11 @@ hastscript@^7.0.0:
     property-information "^6.0.0"
     space-separated-tokens "^2.0.0"
 
+highlight.js@~11.7.0:
+  version "11.7.0"
+  resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-11.7.0.tgz#3ff0165bc843f8c9bce1fd89e2fda9143d24b11e"
+  integrity sha512-1rRqesRFhMO/PRF+G86evnyJkCgaZFOI+Z6kdj15TA18funfoqJXvgPCLSf0SWq3SRfg1j3HlDs8o4s3EGq1oQ==
+
 human-signals@^4.3.0:
   version "4.3.1"
   resolved "https://registry.yarnpkg.com/human-signals/-/human-signals-4.3.1.tgz#ab7f811e851fca97ffbd2c1fe9a958964de321b2"
@@ -3385,6 +3402,15 @@ loose-envify@^1.1.0, loose-envify@^1.4.0:
   dependencies:
     js-tokens "^3.0.0 || ^4.0.0"
 
+lowlight@^2.0.0:
+  version "2.8.1"
+  resolved "https://registry.yarnpkg.com/lowlight/-/lowlight-2.8.1.tgz#5f54016ebd1b2f66b3d0b94d10ef6dd5df4f2e42"
+  integrity sha512-HCaGL61RKc1MYzEYn3rFoGkK0yslzCVDFJEanR19rc2L0mb8i58XM55jSRbzp9jcQrFzschPlwooC0vuNitk8Q==
+  dependencies:
+    "@types/hast" "^2.0.0"
+    fault "^2.0.0"
+    highlight.js "~11.7.0"
+
 lru-cache@^5.1.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-5.1.1.tgz#1da27e6710271947695daf6848e847f01d84b920"
@@ -4374,6 +4400,17 @@ regjsparser@^0.9.1:
   dependencies:
     jsesc "~0.5.0"
 
+rehype-highlight@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/rehype-highlight/-/rehype-highlight-6.0.0.tgz#8097219d8813b51f4c2b6d92db27dac6cbc9a641"
+  integrity sha512-q7UtlFicLhetp7K48ZgZiJgchYscMma7XjzX7t23bqEJF8m6/s+viXQEe4oHjrATTIZpX7RG8CKD7BlNZoh9gw==
+  dependencies:
+    "@types/hast" "^2.0.0"
+    hast-util-to-text "^3.0.0"
+    lowlight "^2.0.0"
+    unified "^10.0.0"
+    unist-util-visit "^4.0.0"
+
 rehype-katex@^6.0.2:
   version "6.0.2"
   resolved "https://registry.yarnpkg.com/rehype-katex/-/rehype-katex-6.0.2.tgz#20197bbc10bdf79f6b999bffa6689d7f17226c35"