IFormattingSupport can be either doc or range formatting support, fixes #1163

src/vs/editor/contrib/format/common/format.ts

@@ -22,7 +22,9 @@ export const FormatOnTypeRegistry = new LanguageFeatureRegistry<IFormattingSuppo
 export {IFormattingSupport};
 
 export function formatRange(model: IModel, range: IRange, options: IFormattingOptions): TPromise<ISingleEditOperation[]> {
-	const [support] = FormatRegistry.ordered(model);
+	const [support] = FormatRegistry.ordered(model)
+		.filter(s => typeof s.formatRange === 'function');
+
 	if (!support) {
 		return TPromise.as(undefined);
 	}

src/vs/workbench/test/common/api/extHostLanguageFeatures.test.ts

@@ -958,6 +958,27 @@ suite('ExtHostLanguageFeatures', function() {
 		});
 	})
 
+	test('Format Range, + format_doc', function(done) {
+		disposables.push(extHost.registerDocumentRangeFormattingEditProvider(defaultSelector, <vscode.DocumentRangeFormattingEditProvider>{
+			provideDocumentRangeFormattingEdits(): any {
+				return [new types.TextEdit(new types.Range(0, 0, 1, 1), 'range')];
+			}
+		}));
+		disposables.push(extHost.registerDocumentFormattingEditProvider(defaultSelector, <vscode.DocumentFormattingEditProvider>{
+			provideDocumentFormattingEdits(): any {
+				return [new types.TextEdit(new types.Range(0, 0, 1, 1), 'doc')];
+			}
+		}));
+		threadService.sync().then(() => {
+			formatRange(model, { startLineNumber: 1, startColumn: 1, endLineNumber: 1, endColumn: 1 }, { insertSpaces: true, tabSize: 4 }).then(value => {
+				assert.equal(value.length, 1);
+				let [first] = value;
+				assert.equal(first.text, 'range');
+				done();
+			});
+		});
+	});
+
 	test('Format Range, evil provider', function(done) {
 		disposables.push(extHost.registerDocumentRangeFormattingEditProvider(defaultSelector, <vscode.DocumentRangeFormattingEditProvider>{
 			provideDocumentRangeFormattingEdits(): any {