Function installEmbedObserverForDocument

src/code_embed.ts:519–584

(doc: Document, docWindow: Window, plugin: CodeSpacePlugin)

}

function installEmbedObserverForDocument(doc: Document, docWindow: Window, plugin: CodeSpacePlugin) {
	if (embedObserversByDoc.has(doc)) return;
	if (!doc.body) {
		// Popout windows may fire before body is ready; retry shortly.
		docWindow.setTimeout(() => installEmbedObserverForDocument(doc, docWindow, plugin), 80);
		return;
	}

	const observer = new MutationObserver((mutations) => {
		for (const mutation of mutations) {
			for (const node of Array.from(mutation.removedNodes)) {
				if (node.nodeType !== 1) continue;

				const elem = node as Element;
				const removedEmbeds: HTMLElement[] = [];

				if (elem.classList.contains("file-embed")) {
					removedEmbeds.push(elem as HTMLElement);
				} else {
					elem.querySelectorAll?.(".file-embed").forEach((e) => removedEmbeds.push(e as HTMLElement));
				}

				for (const embedEl of removedEmbeds) {
					disposeCodeEmbed(embedEl);
				}
			}

			for (const node of Array.from(mutation.addedNodes)) {
				// Cross-window safe: use numeric constant instead of `node instanceof Element`.
				if (node.nodeType !== 1) continue;

				const elem = node as Element;
				const embeds: HTMLElement[] = [];

				if (elem.classList.contains("file-embed")) {
					embeds.push(elem as HTMLElement);
				} else {
					// Look for both div.file-embed and span.file-embed
					elem.querySelectorAll?.(".file-embed").forEach((e) => embeds.push(e as HTMLElement));
				}

				for (const embedEl of embeds) {
					const sourcePath = resolveSourcePathForEmbed(embedEl, plugin);
					// For ambiguous bare filenames, we need a real sourcePath; wait for the leaf to be ready.
					if (!sourcePath) {
						docWindow.setTimeout(() => {
							const retrySourcePath = resolveSourcePathForEmbed(embedEl, plugin);
							if (!retrySourcePath) return;
							rememberSourcePath(embedEl, retrySourcePath);
							scheduleProcessCodeEmbed(embedEl, plugin, retrySourcePath);
						}, 120);
						continue;
					}
					rememberSourcePath(embedEl, sourcePath);
					scheduleProcessCodeEmbed(embedEl, plugin, sourcePath);
				}
			}
		}