enh: summary tag support

src/lib/utils/marked/extension.ts

@@ -0,0 +1,70 @@
+// Helper function to find matching closing tag
+function findMatchingClosingTag(src, openTag, closeTag) {
+	let depth = 1;
+	let index = openTag.length;
+	while (depth > 0 && index < src.length) {
+		if (src.startsWith(openTag, index)) {
+			depth++;
+		} else if (src.startsWith(closeTag, index)) {
+			depth--;
+		}
+		if (depth > 0) {
+			index++;
+		}
+	}
+	return depth === 0 ? index + closeTag.length : -1;
+}
+
+function detailsTokenizer(src) {
+	const detailsRegex = /^<details>\n/;
+	const summaryRegex = /^<summary>(.*?)<\/summary>\n/;
+
+	if (detailsRegex.test(src)) {
+		const endIndex = findMatchingClosingTag(src, '<details>', '</details>');
+		if (endIndex === -1) return;
+
+		const fullMatch = src.slice(0, endIndex);
+		let content = fullMatch.slice(10, -10).trim(); // Remove <details> and </details>
+
+		let summary = '';
+		const summaryMatch = summaryRegex.exec(content);
+		if (summaryMatch) {
+			summary = summaryMatch[1].trim();
+			content = content.slice(summaryMatch[0].length).trim();
+		}
+
+		return {
+			type: 'details',
+			raw: fullMatch,
+			summary: summary,
+			text: content
+		};
+	}
+}
+
+function detailsStart(src) {
+	return src.match(/^<details>/) ? 0 : -1;
+}
+
+function detailsRenderer(token) {
+	return `<details>
+  ${token.summary ? `<summary>${token.summary}</summary>` : ''}
+  ${token.text}
+  </details>`;
+}
+
+function detailsExtension() {
+	return {
+		name: 'details',
+		level: 'block',
+		start: detailsStart,
+		tokenizer: detailsTokenizer,
+		renderer: detailsRenderer
+	};
+}
+
+export default function (options = {}) {
+	return {
+		extensions: [detailsExtension(options)]
+	};
+}