Initial VS Code 1.19 source merge (#571)

* Initial 1.19 xcopy

* Fix yarn build

* Fix numerous build breaks

* Next batch of build break fixes

* More build break fixes

* Runtime breaks

* Additional post merge fixes

* Fix windows setup file

* Fix test failures.

* Update license header blocks to refer to source eula

src/vs/editor/contrib/parameterHints/provideSignatureHelp.ts

@@ -0,0 +1,41 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import { TPromise } from 'vs/base/common/winjs.base';
+import { onUnexpectedExternalError } from 'vs/base/common/errors';
+import { IReadOnlyModel } from 'vs/editor/common/editorCommon';
+import { registerDefaultLanguageCommand } from 'vs/editor/browser/editorExtensions';
+import { SignatureHelp, SignatureHelpProviderRegistry } from 'vs/editor/common/modes';
+import { asWinJsPromise, sequence } from 'vs/base/common/async';
+import { Position } from 'vs/editor/common/core/position';
+import { RawContextKey } from 'vs/platform/contextkey/common/contextkey';
+
+export const Context = {
+	Visible: new RawContextKey<boolean>('parameterHintsVisible', false),
+	MultipleSignatures: new RawContextKey<boolean>('parameterHintsMultipleSignatures', false),
+};
+
+export function provideSignatureHelp(model: IReadOnlyModel, position: Position): TPromise<SignatureHelp> {
+
+	const supports = SignatureHelpProviderRegistry.ordered(model);
+	let result: SignatureHelp;
+
+	return sequence(supports.map(support => () => {
+
+		if (result) {
+			// stop when there is a result
+			return undefined;
+		}
+
+		return asWinJsPromise(token => support.provideSignatureHelp(model, position, token)).then(thisResult => {
+			result = thisResult;
+		}, onUnexpectedExternalError);
+
+	})).then(() => result);
+}
+
+registerDefaultLanguageCommand('_executeSignatureHelpProvider', provideSignatureHelp);