add exclusivness to document filter

src/vs/workbench/api/node/extHost.api.impl.ts

@@ -147,18 +147,23 @@ export function createApiFactory(
 		// we cannot say if the extension is doing it right or wrong...
 		let checkSelector = (function () {
 			let done = initData.environment.extensionDevelopmentPath !== extension.extensionFolderPath;
-			function inform(selector: vscode.DocumentSelector) {
-				console.info(`Extension '${extension.id}' uses a document selector without scheme. Learn more about this: https://go.microsoft.com/fwlink/?linkid=872305`);
-				done = true;
+			function informOnce(selector: vscode.DocumentSelector) {
+				if (!done) {
+					console.info(`Extension '${extension.id}' uses a document selector without scheme. Learn more about this: https://go.microsoft.com/fwlink/?linkid=872305`);
+					done = true;
+				}
 			}
 			return function perform(selector: vscode.DocumentSelector): vscode.DocumentSelector {
-				if (!done) {
-					if (Array.isArray(selector)) {
-						selector.forEach(perform);
-					} else if (typeof selector === 'string') {
-						inform(selector);
-					} else if (typeof selector.scheme === 'undefined') {
-						inform(selector);
+				if (Array.isArray(selector)) {
+					selector.forEach(perform);
+				} else if (typeof selector === 'string') {
+					informOnce(selector);
+				} else {
+					if (typeof selector.scheme === 'undefined') {
+						informOnce(selector);
+					}
+					if (!extension.enableProposedApi && typeof selector.exclusive === 'boolean') {
+						throwProposedApiError(extension);
 					}
 				}
 				return selector;

src/vs/workbench/api/node/extHost.protocol.ts

@@ -258,6 +258,7 @@ export interface ISerializedDocumentFilter {
 	language?: string;
 	scheme?: string;
 	pattern?: vscode.GlobPattern;
+	exclusive?: boolean;
 }
 
 export interface MainThreadLanguageFeaturesShape extends IDisposable {

src/vs/workbench/api/node/extHostLanguageFeatures.ts

@@ -887,7 +887,8 @@ export class ExtHostLanguageFeatures implements ExtHostLanguageFeaturesShape {
 				$serialized: true,
 				language: selector.language,
 				scheme: this._transformScheme(selector.scheme),
-				pattern: selector.pattern
+				pattern: selector.pattern,
+				exclusive: selector.exclusive
 			};
 		}
 

src/vs/workbench/api/node/extHostTypeConverters.ts

@@ -696,7 +696,8 @@ function doToLanguageSelector(selector: string | vscode.DocumentFilter): string
 		return {
 			language: selector.language,
 			scheme: selector.scheme,
-			pattern: toGlobPattern(selector.pattern)
+			pattern: toGlobPattern(selector.pattern),
+			exclusive: selector.exclusive
 		};
 	}