add support for embed, media elements

src/embed.ts

@@ -0,0 +1,33 @@
+
+import type { marked } from 'marked';
+import { MarkdownOptions } from './render';
+
+export interface EmbedToken extends marked.Tokens.Generic {
+	media_type: string;
+	href: string;
+}
+
+export function embed_ext(renderer: marked.Renderer, opts: MarkdownOptions) : marked.TokenizerExtension & marked.RendererExtension {
+	return {
+		name: 'embed',
+		level: 'inline',
+		start: (src) => src.match(/\{&/)?.index,
+		tokenizer(src, tokens) {
+			const rule = /^\{&\s+([^\s]+):\s*([^\s]+)\s+&\}/;
+			const match = rule.exec(src);
+
+			if (match) {
+				return {
+					type: 'embed',
+					raw: match[0],
+					media_type: match[1],
+					href: match[2],
+					tokens: [ ]
+				};
+			}
+		},
+		renderer(token: EmbedToken) {
+			return `<embed type="${token.media_type}" src="${token.href}"></embed>`;
+		}
+	};
+}