From ca7dc02d88f43498ef0d2af3723e236639d98f90 Mon Sep 17 00:00:00 2001
From: jialin <jialinkuang@126.com>
Date: Fri, 20 Jun 2025 11:17:24 +0800
Subject: [PATCH] revert: markdown katex parse

---
 src/components/markdown-viewer/utils.ts | 68 ++++++-------------------
 1 file changed, 16 insertions(+), 52 deletions(-)

diff --git a/src/components/markdown-viewer/utils.ts b/src/components/markdown-viewer/utils.ts
index d21d8d99..a9b367a6 100644
--- a/src/components/markdown-viewer/utils.ts
+++ b/src/components/markdown-viewer/utils.ts
@@ -32,60 +32,24 @@ export function escapeDollarNumber(text: string) {
   return escapedText;
 }
 
-export function escapeBrackets(text: string): string {
-  const codeRegex = /```[\s\S]*?```|`[^`\n]+`/g;
-
-  const codeBlocks: string[] = [];
-  const placeholder = '%%CODE_BLOCK%%';
-
-  // 1. replace code blocks with a placeholder
-  //    and store them in an array
-  const temp = text.replace(codeRegex, (match) => {
-    codeBlocks.push(match);
-    return placeholder;
-  });
-
-  // 2. repace \[...\] with $$...$$，and replace \(...\) with $...$
-  const replaced = temp
-    .replace(/\\\[([\s\S]*?)\\\]/g, (_, inner) => `$$${inner}$$`)
-    .replace(/\\\(([\s\S]*?)\\\)/g, (_, inner) => `$${inner}$`);
-
-  // 3. restore code blocks from the placeholder
-  let i = 0;
-  return replaced.replace(
-    new RegExp(placeholder, 'g'),
-    () => codeBlocks[i++] || ''
+export function escapeBrackets(text: string) {
+  const pattern =
+    /(```[\S\s]*?```|`.*?`)|\\\[([\S\s]*?[^\\])\\]|\\\((.*?)\\\)/g;
+  return text.replaceAll(
+    pattern,
+    (match, codeBlock, squareBracket, roundBracket) => {
+      if (codeBlock) {
+        return codeBlock;
+      } else if (squareBracket) {
+        return `$$${squareBracket}$$`;
+      } else if (roundBracket) {
+        return `$${roundBracket}$`;
+      }
+      return match;
+    }
   );
 }
 
-export function escapeMhchem_2(text: string) {
+export function escapeMhchem(text: string) {
   return text.replaceAll('$\\ce{', '$\\\\ce{').replaceAll('$\\pu{', '$\\\\pu{');
 }
-
-export function escapeMhchem(text: string): string {
-  const codeRegex = /```[\s\S]*?```|`[^`\n]+`/g;
-  const codeBlocks: string[] = [];
-  const placeholder = '%%CODE_BLOCK%%';
-
-  // 1. Replace code blocks with a placeholder
-  const temp = text.replace(codeRegex, (match) => {
-    codeBlocks.push(match);
-    return placeholder;
-  });
-
-  // 2. Only perform \ce{} / \pu{} escaping inside $...$ (to avoid incorrect escaping outside math environments)
-  const mathRegex = /\$(.+?)\$/gs;
-  const escaped = temp.replace(mathRegex, (_, content) => {
-    const fixed = content
-      .replace(/(?<!\\)\\ce\{/g, '\\\\ce{')
-      .replace(/(?<!\\)\\pu\{/g, '\\\\pu{');
-    return `$${fixed}$`;
-  });
-
-  // 3. Restore code blocks
-  let i = 0;
-  return escaped.replace(
-    new RegExp(placeholder, 'g'),
-    () => codeBlocks[i++] || ''
-  );
-}