ds-markdown
Version:
> 🚀 React Markdown 打字动画组件，提供现代聊天界面效果
69 lines • 2.52 kB
JavaScript
/** 此文件借鉴 marked 的部分代码 */
const other = {
caret: /(^|[^[])\^/g,
listItemRegex: (bull) => new RegExp(`^( {0,3}${bull})((?:[\t ][^\\n]*)?(?:\\n|$))`),
nextBulletRegex: (indent) => new RegExp(`^ {0,${Math.min(3, indent - 1)}}(?:[*+-]|\\d{1,9}[.)])((?:[ \t][^\\n]*)?(?:\\n|$))`),
listReplaceTabs: /^\t+/,
nonSpaceChar: /[^ ]/,
blankLine: /^[ \t]*$/,
listIsTask: /^\[[ xX]\] /,
listReplaceTask: /^\[[ xX]\] +/,
tabCharGlobal: /\t/g,
hrRegex: (indent) => new RegExp(`^ {0,${Math.min(3, indent - 1)}}((?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$)`),
headingBeginRegex: (indent) => new RegExp(`^ {0,${Math.min(3, indent - 1)}}#`),
htmlBeginRegex: (indent) => new RegExp(`^ {0,${Math.min(3, indent - 1)}}<(?:[a-z].*>|!--)`, 'i'),
fencesBeginRegex: (indent) => new RegExp(`^ {0,${Math.min(3, indent - 1)}}(?:\`\`\`|~~~)`),
};
/**
* 编辑正则表达式
* @param regex 正则表达式
* @param opt 正则表达式选项
* @returns 编辑后的正则表达式
*/
function edit(regex, opt = '') {
let source = typeof regex === 'string' ? regex : regex.source;
const obj = {
replace: (name, val) => {
let valSource = typeof val === 'string' ? val : val.source;
valSource = valSource.replace(other.caret, '$1');
source = source.replace(name, valSource);
return obj;
},
getRegex: () => {
return new RegExp(source, opt);
},
};
return obj;
}
const newline = /^(?:[ \t]*(?:\n|$))+/;
const hr = /^ {0,3}((?:-[\t ]*){3,}|(?:_[ \t]*){3,}|(?:\*[ \t]*){3,})(?:\n+|$)/;
/** 列表 */
const bullet = /(?:[*+-]|\d{1,9}[.)])/;
/** 列表 */
const list = edit(/^( {0,3}bull)([ \t][^\n]+?)?(?:\n|$)/)
.replace(/bull/g, bullet)
.getRegex();
/** 围栏 fence
* 什么是围栏： 围栏是用来包裹代码块的，比如 ```javascript 和 ``` 之间就是围栏
*/
const fences = /^ {0,3}(`{3,}(?=[^`\n]*(?:\n|$))|~{3,})([^\n]*)(?:\n|$)(?:|([\s\S]*?)(?:\n|$))(?: {0,3}\1[~`]* *(?=\n|$)|$)/;
// 一个块
// const _segment = /^([^\n]+(?:\n(?!fences|list|hr| +\n)[^\n]+)*)/;
const _segment = /^([^\n]+(?:\n(?!fences|list|hr| +\n|\n)[^\n]+)*\n?)/;
const segment = edit(_segment)
.replace(/fences/, fences)
.replace(/list/, list)
.replace(/hr/, hr)
.getRegex();
const blockNormal = {
newline,
fences,
segment,
list,
hr,
};
export const rules = {
block: blockNormal,
other,
};
//# sourceMappingURL=rule.js.map