Function resolveLanguageExtension

src/lib/editorManager.js:1384–1420

(file, languageSignature, warnKey)

	}

	function resolveLanguageExtension(file, languageSignature, warnKey) {
		const langExtFn = file.currentLanguageExtension;
		if (typeof langExtFn !== "function") {
			markLanguageReady(file, languageSignature, true);
			return [];
		}

		let result;
		try {
			result = langExtFn();
		} catch (_) {
			markLanguageReady(file, languageSignature, true);
			return [];
		}

		if (result && typeof result.then === "function") {
			const fileId = file.id;
			markLanguageReady(file, languageSignature, false);
			result
				.then((ext) => {
					if (
						manager.activeFile?.id !== fileId ||
						file.__cmLanguageSignature !== languageSignature
					) {
						return;
					}
					dispatchLanguageExtension(file, languageSignature, ext, warnKey);
				})
				.catch(() => {
					markLanguageReady(file, languageSignature, true);
				});
			return [];
		}

		markLanguageReady(file, languageSignature, true);
		return result || [];
	}

	function scheduleLspForFile(file) {
		const fileId = file?.id;