[html][css] diagnistics for embedded content

extensions/html/client/src/embeddedContentUri.ts

@@ -0,0 +1,27 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+'use strict';
+
+import { Uri } from 'vscode';
+
+export const EMBEDDED_CONTENT_SCHEME = 'embedded-content';
+
+export function isEmbeddedContentUri(virtualDocumentUri: Uri): boolean {
+	return virtualDocumentUri.scheme === EMBEDDED_CONTENT_SCHEME;
+}
+
+export function getEmbeddedContentUri(parentDocumentUri: string, embeddedLanguageId: string): Uri {
+	return Uri.parse(EMBEDDED_CONTENT_SCHEME + '://' + embeddedLanguageId + '/' + encodeURIComponent(parentDocumentUri) + '.' + embeddedLanguageId);
+};
+
+export function getHostDocumentUri(virtualDocumentUri: Uri): string {
+	let languageId = virtualDocumentUri.authority;
+	let path = virtualDocumentUri.path.substring(1, virtualDocumentUri.path.length - languageId.length - 1); // remove leading '/' and new file extension
+	return decodeURIComponent(path);
+};
+
+export function getEmbeddedLanguageId(virtualDocumentUri: Uri): string {
+	return virtualDocumentUri.authority;
+}