[Bug] 多行公式渲染有问题 about chatgpt-next-web HOT 5 CLOSED

function replaceLatexEnvironments(text: string): string {
  // 使用正则表达式替换 $$\begin{aligned} 为 $$
  text = text.replace(/\$\$\s*\\begin\{aligned}/, '$$\\begin{aligned}');

  // 使用正则表达式替换 \end{aligned}$$ 为 \end{aligned}$
  text = text.replace(/\\end\{aligned}\s*\$\$/g, '\\end{aligned}$');

  return text;
}

function escapeBrackets(text: string): string {
  const pattern =
    /(```[\s\S]*?```|`[^`]*`)|\\\[(.*?)\\\]|\\\[(\n\\begin\{[\s\S]*?\}\n)\\\]/g;
  text =  replaceLatexEnvironments(text);
  return text.replace(
    pattern,
    (match, codeBlock, simpleSquareBracketContent, complexSquareBracketContent) => {
      if (codeBlock) {
        // 代码块，直接返回
        return match;
      } else if (simpleSquareBracketContent !== undefined) {
        // 简单方括号内的内容，转换为 $...$ 形式
        const regex = /\[(.*?)\s*(?=\+|=|{)/;
        const isMatched = regex.test(match);
        if(isMatched) { // 加一个约束条件
            // 处理方括号内的内容，转换为 $...$ 形式
            return `$${simpleSquareBracketContent}$`;
        }
      } else if (complexSquareBracketContent !== undefined) {
        // 复杂方括号内容（包含 \begin{}），也转换为 $$...$$ 形式
        return `$$${complexSquareBracketContent}$$`;
      }
      // 默认返回匹配到的内容
      return match;
    },
  );
}

function escapeDollarNumber(text: string) {
  let escapedText = "";
  let isInMathExpression = false;
  let isInCodeBlock = false;

  const codeBlockStartRegex = /^`{1,3}$/;

  for (let i = 0; i < text.length; i++) {
    let char = text[i];
    const nextChar = text[i + 1] || " ";

    // Toggle the isInMathExpression flag when encountering a dollar sign
    if (char === "$") {
      isInMathExpression = !isInMathExpression;
    }

    // Toggle the isInCodeBlock flag when encountering a code block start indicator
    if (codeBlockStartRegex.test(char + nextChar)) {
      isInCodeBlock = !isInCodeBlock;
    }

    // If inside a code block, preserve the character as is
    if (isInCodeBlock) {
      escapedText += char;
      continue;
    }

    // Preserve the double dollar sign in math expressions
    if (char === "$" && nextChar === "$") {
      escapedText += "$$"; // Preserve the double dollar sign
      i++; // Skip the next dollar sign since we have already included it
      continue;
    }

    // Escape a single dollar sign followed by a number outside of math expressions
    if (char === "$" && nextChar >= "0" && nextChar <= "9" && !isInMathExpression) {
      escapedText += "&#36;"; // Use HTML entity &#36; to represent the dollar sign
      continue;
    }

    escapedText += char;
  }

  return escapedText;
}

function _MarkDownContent(props: { content: string }) {
  const escapedContent = useMemo(
    () => escapeBrackets(escapeDollarNumber(props.content)),
    [props.content],
  );``````

显示正确演示：
![510192826](https://github.com/ChatGPTNextWeb/ChatGPT-Next-Web/assets/52877918/446a00fc-7383-4b52-9c9f-16c78fc28cad)