64 lines
2.5 KiB
TypeScript
64 lines
2.5 KiB
TypeScript
import { marked, Renderer } from 'marked';
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const WIKI_LINK = /\[\[([^\]|\n]+?)(?:\|([^\]\n]+?))?\]\]/g;
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const UNSAFE_SCHEME = /^(?:javascript|data|vbscript):/i;
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export function normalizeImportedMarkup(source: string): string {
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return source.replace(/<aside>\s*([\s\S]*?)\s*<\/aside>/giu, (_match, rawBody: string) => {
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const body = rawBody.trim().split('\n').map(line => `> ${line}`).join('\n');
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return `\n\n${body}\n\n`;
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});
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}
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export function expandWikiLinks(source: string): string {
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return source.replace(WIKI_LINK, (_match, rawTarget: string, rawLabel?: string) => {
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const target = rawTarget.trim();
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const label = (rawLabel || rawTarget).trim();
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const encoded = encodeURIComponent(target).replace(/%2F/gi, '/');
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return `[${label}](hololake://knowledge/${encoded} "${target.replace(/"/g, '"')}")`;
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});
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}
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function escapeHtml(value: string): string {
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return value
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.replace(/&/g, '&')
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.replace(/</g, '<')
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.replace(/>/g, '>')
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.replace(/"/g, '"')
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.replace(/'/g, ''');
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}
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function safeHref(href: string | null): string {
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const value = (href || '').trim();
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return UNSAFE_SCHEME.test(value) ? '#' : value;
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}
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const renderer = new Renderer();
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const renderBaseTable = renderer.table.bind(renderer);
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renderer.html = ({ text }) => /^<br\s*\/?\s*>$/iu.test(text.trim())
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? '<br>'
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: `<pre class="kb-raw-html"><code>${escapeHtml(text)}</code></pre>`;
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renderer.link = ({ href, title, tokens }) => {
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const label = renderer.parser.parseInline(tokens);
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const safe = escapeHtml(safeHref(href));
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const titleAttr = title ? ` title="${escapeHtml(title)}"` : '';
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const wiki = safe.startsWith('hololake://knowledge/');
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return `<a href="${safe}"${titleAttr}${wiki ? ' data-hololake-wiki="true"' : ''}>${label}</a>`;
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};
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renderer.image = ({ href, title, text }) => {
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const safe = safeHref(href);
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if (!safe || safe === '#') return `<span class="kb-image-blocked">图片地址已拦截</span>`;
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const titleAttr = title ? ` title="${escapeHtml(title)}"` : '';
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return `<img src="${escapeHtml(safe)}" alt="${escapeHtml(text)}"${titleAttr} loading="lazy">`;
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};
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renderer.table = token => `<div class="kb-table-scroll">${renderBaseTable(token)}</div>`;
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marked.setOptions({ gfm: true, breaks: false });
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export function renderKnowledgeMarkdown(source: string): string {
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try {
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return marked.parse(expandWikiLinks(normalizeImportedMarkup(source)), { async: false, renderer }) as string;
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} catch {
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return '<p class="kb-render-error">此页面暂时无法渲染，请切换到编辑模式检查原文。</p>';
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}
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}
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