Taro markdown 解析器

文章目录

• ​​效果​​
• ​​环境​​
• ​​思路​​
• ​​代码 - 未完待续​​
• ​​git 仓库​​

没有找到合适的库 期待Taro的发展
没有经过测试 只提供一个思路
项目代码在下方的git仓库
代码未必会同步更新到此出需要代码可以前往git仓库拷贝

效果

环境

"dependencies": {
    "@babel/runtime": "^7.7.7",
    "@tarojs/cli": "3.3.16",
    "@tarojs/components": "3.3.16",
    "@tarojs/react": "3.3.16",
    "@tarojs/runtime": "3.3.16",
    "@tarojs/taro": "3.3.16",
    "linaria": "^2.2.0",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "taro-hooks": "latest"
  },

思路

根据字符串一个一个排查 最终形成一个类似下面结构的数组

然后遍历渲染对应的组件

代码 - 未完待续

function parseStr(tree: any, str: string) {
  // 代码块
  // let result = str.match(/^```[\S]+\n([\s|\S][^`|``|```]*)(```)?/);
  let result = str.match(/^```[\S]+\n(([\s|\S](?!```))*)(```)?/);
  if (result) {
    tree.push({
      type: "code",
      text: result[1]
    });
    return parseStr(tree, str.slice(result[0].length + 4));
  }
  //标题 h1～h6
  result = str.match(/^(#{1,6}) (.+)/);
  if (result) {
    tree.push({
      type: "title",
      text: result[2],
      level: result[1].length
    });
    return parseStr(tree, str.slice(result[0].length));
  }
  //链接
  result = str.match(/^\[([\s|\S][^\]]*)\]\(([\S][^\)]*)\)/);
  if (result) {
    tree.push({
      type: "link",
      text: result[1],
      src: result[2]
    });
    return parseStr(tree, str.slice(result[0].length));
  }
  //图片
  result = str.match(/^!\[([\s|\S][^\]]*)\]\(([\S][^\)]*)\)/);
  if (result) {
    tree.push({
      type: "img",
      alt: result[1],
      src: result[2]
    });
    return parseStr(tree, str.slice(result[0].length));
  }
  //换行
  result = str.match(/^\n/);
  if (result) {
    tree.push({ type: "nextLine" });
    return parseStr(tree, str.slice(result[0].length));
  }
  //引用
  result = str.match(/^>(.*)/);
  if (result) {
    const child = [];
    parseStr(child, result[1]);
    if (result[1]) {
      //有时只有一个 >  这时不渲染
      tree.push({
        type: "quote",
        child
      });
    }
    return parseStr(tree, str.slice(result[0].length + 1)); //加1 是为了去掉结尾的\n
  }
  result = str.match(/^\*\*(?!\s)(.*)\*\*/); // 加粗 **xxx**
  if (result) {
    tree.push({ type: "bold", text: result[1] });
    return parseStr(tree, str.slice(result[0].length));
  }
  result = str.match(/^`(.*)`/); // 标签 `xxx`
  if (result) {
    tree.push({ type: "tag", text: result[1] });
    return parseStr(tree, str.slice(result[0].length));
  }
  //! 优先级要低
  result = str.match(/.[^\[|\*|`|>|!|\s]*/);
  if (result) {
    tree.push({ type: "text", text: result[0] });
    return parseStr(tree, str.slice(result[0].length));
  }
}

使用

const MarkDownParse: FC<IProps> = ({ children }): ReactElement => {
  const [mdTree, setMdTree] = useState<any>([]);

  useEffect(() => {
    const vTree: any = [];
    parseStr(vTree, children);
    console.log("tree:", vTree);
    setMdTree(vTree);
  }, [children]);

  return (
    <Container>
      {mdTree.map(({ type, ...params }) => {
        const Component = TypeComponent[type];
        return <Component key={Math.random()} {...params} />;
      })}
    </Container>
  );
};

git 仓库

​​https://gitee.com/honbingitee/hongbin-blog/tree/master/src/components/MarkDownParse​​