forked from Gitlink/forgeplus-react
143 lines
4.2 KiB
JavaScript
143 lines
4.2 KiB
JavaScript
import React, { useEffect, useRef, useMemo , useState } from 'react'
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import 'katex/dist/katex.min.css';
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import marked, { getTocContent, cleanToc, getMathExpressions, resetMathExpressions } from '../common/marked';
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import 'code-prettify';
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import dompurify from 'dompurify';
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import { getEmoji } from '../forge/Main/emoji';
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import axios from 'axios';
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import imgError from '../images/img-error.png'
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import { renderToString } from 'katex'
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const preRegex = /<pre[^>]*>/g;
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const strRegexSub = /:([a-zA-Z_]+):/g;
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const quoteRegex = /\[[#][0-9]{0,}\]\(\/[A-Za-z0-9]{0,}\/[A-Za-z0-9]{0,}\/issues\/[0-9]{0,}\)/g;
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function _unescape(str) {
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let div = document.createElement('div')
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div.innerHTML = str
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return div.childNodes.length === 0 ? "" : div.childNodes[0].nodeValue
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}
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export default ({
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value = '',
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className,
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style = {},
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url,
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owner=undefined,
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projectsId=undefined
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}) => {
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const [ issues , setIssues ] = useState([]);
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useEffect(()=>{
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if(owner&&projectsId){
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getIssueList();
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}
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},[owner,projectsId])
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function getIssueList(){
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let matchQuote = str.match(quoteRegex);
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let array = [];
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if(matchQuote && matchQuote.length>0){
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for(var x=0;x<matchQuote.length;x++){
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let getIndex = matchQuote[x].match(/#(\S*)\]/)[1];
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getIndex && array.push(getIndex);
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}
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axios.get(`/${owner}/${projectsId}/issues/index_to_name`,{params:{
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index:array
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}}).then(result=>{
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if(result){
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setIssues(result.data);
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}
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})
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}
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}
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let str = String(value);
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const html = useMemo(() => {
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let rs = marked(str);
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const math_expressions = getMathExpressions();
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if (str.match(/\[TOC\]/)) {
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rs = rs.replace("<p>[TOC]</p>", getTocContent())
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cleanToc()
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}
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// 循环匹配所有emoji
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let matchStr = str.match(strRegexSub);
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if(matchStr && matchStr.length>0){
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for(var i=0;i < matchStr.length;i++){
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rs = rs.replace(matchStr[i],getEmoji(matchStr[i]));
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}
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}
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if(owner && projectsId && issues && issues.length>0){
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for(var x=0;x<issues.length;x++){
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let item = issues[x];
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let content = item.id ? `<a href="`+`/${owner}/${projectsId}/issues/${item.project_issues_index}`+`">#${item.project_issues_index}:${item.subject}</a>` : `<span>#${item.project_issues_index}(已删除)</span>`;
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rs = rs.replaceAll(`<a href="`+`/${owner}/${projectsId}/issues/${item.project_issues_index}`+`">#${item.project_issues_index}</a>`,content);
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}
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}
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rs = rs.replace(/(__special_katext_id_\d+__)/g, (_match, capture) => {
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const { type, expression } = math_expressions[capture];
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return renderToString(_unescape(expression) || '', { displayMode: type === 'block', throwOnError: false, output: 'html' })
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})
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rs = dompurify.sanitize(rs.replace(/▁/g, "▁▁▁"))
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rs = rs.replaceAll('<img ', `<img onerror="javascript:this.src='${ imgError }';"`)
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resetMathExpressions()
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return rs
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}, [str,issues]);
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// 锚点跳转，链接地址里含#对应的id
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useEffect(()=>{
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if(url && url.hash && html){
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let u = url.hash;
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if(u){
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let id = decodeURIComponent(u.split("#")[1]);
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let ele = document.getElementById(id);
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if(ele){
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window.scrollTo(0, ele.offsetTop);
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}
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}
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}
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},[url,html])
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const el = useRef();
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function onAncherHandler(e) {
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let target = e.target;
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if (target.tagName.toUpperCase() === 'A') {
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let ancher = target.getAttribute('href');
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if (ancher && ancher.startsWith('#')) {
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e.preventDefault()
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let viewEl = document.getElementById(ancher.replace('#', ''))
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if (viewEl) {
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viewEl.scrollIntoView(true)
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}
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}
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}
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}
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useEffect(() => {
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if (el.current && html) {
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if (html.match(preRegex)) {
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window.PR.prettyPrint()
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}
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}
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if (el.current) {
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el.current.addEventListener('click', onAncherHandler)
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return () => {
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el.current.removeEventListener('click', onAncherHandler)
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resetMathExpressions()
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cleanToc()
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}
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}
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}, [html, el.current, onAncherHandler])
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return (
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<div
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ref={el}
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style={style}
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className={`${className ? className : ''} markdown-body`}
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dangerouslySetInnerHTML={{ __html: html }}
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></div>
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)
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}
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