DocumentContext to remove url dependency from service

extensions/css-language-features/server/src/cssServerMain.ts

@@ -7,14 +7,14 @@
 import {
 	createConnection, IConnection, TextDocuments, InitializeParams, InitializeResult, ServerCapabilities, ConfigurationRequest, WorkspaceFolder
 } from 'vscode-languageserver';
-
+import URI from 'vscode-uri';
 import { TextDocument, CompletionList } from 'vscode-languageserver-types';
 
 import { getCSSLanguageService, getSCSSLanguageService, getLESSLanguageService, LanguageSettings, LanguageService, Stylesheet } from 'vscode-css-languageservice';
 import { getLanguageModelCache } from './languageModelCache';
-import { formatError, runSafe } from './utils/runner';
-import URI from 'vscode-uri';
 import { getPathCompletionParticipant } from './pathCompletion';
+import { formatError, runSafe } from './utils/runner';
+import { getDocumentContext } from './utils/documentContext';
 
 export interface Settings {
 	css: LanguageSettings;
@@ -258,8 +258,9 @@ connection.onDocumentLinks((documentLinkParams, token) => {
 	return runSafe(() => {
 		const document = documents.get(documentLinkParams.textDocument.uri);
 		if (document) {
+			const documentContext = getDocumentContext(document.uri, workspaceFolders);
 			const stylesheet = stylesheets.get(document);
-			return getLanguageService(document).findDocumentLinks(document, stylesheet);
+			return getLanguageService(document).findDocumentLinks(document, stylesheet, documentContext);
 		}
 		return [];
 	}, [], `Error while computing document links for ${documentLinkParams.textDocument.uri}`, token);

extensions/css-language-features/server/src/utils/documentContext.ts

@@ -0,0 +1,40 @@
+/*---------------------------------------------------------------------------------------------
+ *  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 { DocumentContext } from 'vscode-css-languageservice';
+import { endsWith, startsWith } from '../utils/strings';
+import * as url from 'url';
+import { WorkspaceFolder } from 'vscode-languageserver';
+
+export function getDocumentContext(documentUri: string, workspaceFolders: WorkspaceFolder[]): DocumentContext {
+	function getRootFolder(): string | undefined {
+		for (let folder of workspaceFolders) {
+			let folderURI = folder.uri;
+			if (!endsWith(folderURI, '/')) {
+				folderURI = folderURI + '/';
+			}
+			if (startsWith(documentUri, folderURI)) {
+				return folderURI;
+			}
+		}
+		return void 0;
+	}
+
+	return {
+		resolveReference: (ref, base = documentUri) => {
+			if (ref[0] === '/') { // resolve absolute path against the current workspace folder
+				if (startsWith(base, 'file://')) {
+					let folderUri = getRootFolder();
+					if (folderUri) {
+						return folderUri + ref.substr(1);
+					}
+				}
+			}
+			return url.resolve(base, ref);
+		},
+	};
+}
+