209 lines
8.5 KiB
JavaScript
209 lines
8.5 KiB
JavaScript
// ── Markdown rendering ──
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import { esc } from './util.js';
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import { state } from './state.js';
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marked.use({ breaks: true, gfm: true, renderer: {
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link({ href, text }) {
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const isExternal = /^https?:\/\//.test(href);
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if (isExternal) return `<a href="${href}" target="_blank" rel="noopener">${text}</a>`;
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return `<a href="${href}">${text}</a>`;
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}
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}});
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const purifyConfig = {
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ALLOWED_TAGS: ['h1','h2','h3','h4','h5','h6','p','br','hr','ul','ol','li','a','strong','em','del','code','pre','blockquote','table','thead','tbody','tr','th','td','img','input','span','div','audio','source'],
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ALLOWED_ATTR: ['href','src','alt','width','height','type','checked','disabled','class','style','data-card-id','title','controls','preload','target','rel','align'],
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ALLOW_DATA_ATTR: true,
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};
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function normalizeListBlock(block) {
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const lines = String(block || '').replace(/\r\n?/g, '\n').split('\n');
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while (lines.length && !lines[0].trim()) lines.shift();
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while (lines.length && !lines[lines.length - 1].trim()) lines.pop();
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if (!lines.length) return '';
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const minIndent = lines
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.filter(l => l.trim())
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.map(l => (l.match(/^[ \t]*/) || [''])[0].replace(/\t/g, ' ').length)
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.reduce((min, n) => Math.min(min, n), Infinity);
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return lines
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.map(l => {
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const expanded = l.replace(/\t/g, ' ');
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if (!expanded.trim()) return '';
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return expanded.slice(Math.min(minIndent, expanded.length));
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})
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.join('\n');
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}
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export function renderMd(src) {
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let processed = String(src || '').replace(/\r\n?/g, '\n');
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// Convert Unicode box-drawing tables to HTML
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processed = processed.replace(/([ \t]*[┌╔][\s\S]*?[┘╝][ \t]*)/g, (block) => {
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const lines = block.split('\n').filter(l => l.trim());
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const rows = [];
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let currentRow = null;
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for (const line of lines) {
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const trimmed = line.trim();
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// Skip border lines (┌─┬─┐, ├─┼─┤, └─┴─┘, ╔═╦═╗, etc.)
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if (/^[┌┐└┘├┤┬┴┼─│╔╗╚╝╠╣╦╩╬═║\s]+$/.test(trimmed)) {
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if (currentRow) { rows.push(currentRow); currentRow = null; }
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continue;
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}
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// Data row: │ cell │ cell │ or ║ cell ║
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if (/^[│║]/.test(trimmed)) {
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const cells = trimmed.split(/[│║]/).slice(1, -1).map(c => c.trim());
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if (currentRow && currentRow.length === cells.length) {
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// Continuation line — append to previous cells
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for (let i = 0; i < cells.length; i++) {
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if (cells[i]) currentRow[i] = ((currentRow[i] || '') + ' ' + cells[i]).trim();
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}
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} else {
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if (currentRow) rows.push(currentRow);
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currentRow = cells;
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}
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}
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}
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if (currentRow) rows.push(currentRow);
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if (rows.length < 2) return block;
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const header = rows[0];
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const body = rows.slice(1);
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return '\n<table><thead><tr>' +
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header.map(c => `<th>${esc(c)}</th>`).join('') +
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'</tr></thead><tbody>' +
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body.map(r => '<tr>' + r.map(c => `<td>${esc(c)}</td>`).join('') + '</tr>').join('') +
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'</tbody></table>\n';
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});
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processed = processed
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// Gallery fenced block: ```gallery
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.replace(/```gallery\s*\n([\s\S]*?)(?:```|$)/g, (_, content) => {
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const imgs = [];
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const imgRe = /!\[([^\]]*)\]\(([^)]+)\)/g;
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let m;
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while ((m = imgRe.exec(content)) !== null) imgs.push({ alt: m[1], src: m[2].split(/\s/)[0] });
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if (!imgs.length) return '';
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return '<div class="md-gallery">' + imgs.map(i =>
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`<div class="md-gallery-item"><img src="${i.src}" alt="${esc(i.alt)}" loading="lazy"></div>`
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).join('') + '</div>';
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})
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// Custom fenced list blocks: ```tree / ```bullets with or without closing ```
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.replace(/```(tree|bullets)\s*\n([\s\S]*?)(?:```|$)/g, (_, kind, content) => {
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const normalized = normalizeListBlock(content);
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return `\n<!-- list:${kind} -->\n${normalized}\n`;
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})
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// Help parser: ensure a list can start after text without requiring manual blank line
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.replace(/([^\n])\n(?=(?: {0,3}[-*+]\s| {0,3}\d+\.\s))/g, '$1\n\n')
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// Preserve extra blank lines as <br> spacers (3+ newlines = 1+ extra blank lines)
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.replace(/\n{3,}/g, m => '\n\n' + '<br>\n'.repeat(m.length - 2))
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// Ensure hr rules have one clean blank line before and after, keep extra <br> beyond that
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.replace(/<br>\n(---+|___+|\*\*\*+)\n/gm, '\n\n$1\n')
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.replace(/(---+|___+|\*\*\*+)\n<br>/gm, '$1\n\n');
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const linked = processed.replace(/\[\[([^\]]+)\]\]/g, (_, title) => {
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const card = state.cards.find(c => c.title.toLowerCase() === title.toLowerCase());
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if (card) return `<span class="card-link" data-card-id="${card.id}">${esc(title)}</span>`;
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return `<span class="card-link broken" title="card not found">${esc(title)}</span>`;
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});
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let html = marked.parse(linked);
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// Convert list hints before sanitize (DOMPurify strips comments)
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html = html.replace(/<!--\s*list:tree\s*-->\s*<ul>/g, '<ul class="tree-list">');
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html = html.replace(/<!--\s*list:bullets\s*-->\s*<ul>/g, '<ul class="bullet-list">');
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html = typeof DOMPurify !== 'undefined' ? DOMPurify.sanitize(html, purifyConfig) : html;
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return html;
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}
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export function addCodeCopyButtons(container) {
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if (!container) return;
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container.querySelectorAll('pre > code').forEach(code => {
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const pre = code.parentElement;
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if (pre.querySelector('.code-copy')) return;
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const btn = document.createElement('button');
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btn.className = 'code-copy';
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btn.type = 'button';
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btn.innerHTML = '<i class="ph ph-copy"></i>';
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btn.addEventListener('click', async () => {
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await navigator.clipboard.writeText(code.textContent);
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btn.classList.add('copied');
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btn.innerHTML = '<i class="ph ph-check"></i>';
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setTimeout(() => { btn.classList.remove('copied'); btn.innerHTML = '<i class="ph ph-copy"></i>'; }, 1500);
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});
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pre.appendChild(btn);
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});
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}
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export function formatTodoItems(container) {
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if (!container) return;
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container.querySelectorAll('li').forEach(li => {
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const cb = li.querySelector('input[type="checkbox"]');
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if (!cb) return;
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if (li.classList.contains('todo-item')) return;
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const checked = cb.checked;
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li.classList.add('todo-item');
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if (checked) li.classList.add('todo-done');
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// Replace <input> with a styled button
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const btn = document.createElement('button');
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btn.type = 'button';
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btn.className = 'todo-cb' + (checked ? ' checked' : '');
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btn.innerHTML = '<i class="ph ph-check"></i>';
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btn.dataset.idx = cb.dataset.idx || '';
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cb.replaceWith(btn);
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// Wrap remaining content in a span
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const span = document.createElement('span');
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span.className = 'todo-text';
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while (btn.nextSibling) span.appendChild(btn.nextSibling);
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li.appendChild(span);
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});
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}
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export function stripMd(src) {
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return (src || '')
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.replace(/<img[^>]*>/gi, '')
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.replace(/<[^>]+>/g, '')
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.replace(/!\[[^\]]*\]\([^)]*\)/g, '')
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.replace(/\[\[([^\]]+)\]\]/g, '$1')
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.replace(/^#{1,6}\s+/gm, '')
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.replace(/(\*{1,3}|_{1,3}|~~)(.*?)\1/g, '$2')
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.replace(/\[([^\]]*)\]\([^)]*\)/g, '$1')
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.replace(/`{1,3}[^`]*`{1,3}/g, '')
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.replace(/^[-*>]\s+/gm, '')
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.replace(/^\d+\.\s+/gm, '')
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.replace(/\n{2,}/g, '\n')
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.trim();
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}
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export function getTodos(src) {
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const s = src || '';
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const total = (s.match(/- \[([ x])\]/g) || []).length;
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if (!total) return null;
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return { total, done: (s.match(/- \[x\]/g) || []).length };
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}
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export function firstImage(src) {
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const s = src || '';
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const md = s.match(/!\[[^\]]*\]\(([^)]+)\)/);
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if (md) return md[1];
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const html = s.match(/<img[^>]+src="([^"]+)"/i);
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return html ? html[1] : null;
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}
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export function leadingImage(src) {
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const s = (src || '').trimStart();
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if (!s) return null;
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const md = s.match(/^!\[[^\]]*\]\(([^)]+)\)/);
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if (md) return md[1].split(/\s+/)[0].replace(/^<(.+)>$/, '$1') || null;
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const html = s.match(/^<img[^>]+src=(['"])(.*?)\1/i);
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return html ? html[2] : null;
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}
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