Merge from vscode 8e0f348413f4f616c23a88ae30030efa85811973 (#6381)

* Merge from vscode 8e0f348413f4f616c23a88ae30030efa85811973

* disable strict null check

src/sql/workbench/api/browser/mainThreadModalDialog.ts

@@ -0,0 +1,70 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import 'vs/css!sql/media/icons/common-icons';
+
+import { WebViewDialog } from 'sql/workbench/parts/webview/electron-browser/webViewDialog';
+import { MainThreadModalDialogShape, SqlMainContext, SqlExtHostContext, ExtHostModalDialogsShape } from 'sql/workbench/api/node/sqlExtHost.protocol';
+
+import { IExtHostContext } from 'vs/workbench/api/common/extHost.protocol';
+import { extHostNamedCustomer } from 'vs/workbench/api/common/extHostCustomers';
+import { IInstantiationService } from 'vs/platform/instantiation/common/instantiation';
+
+@extHostNamedCustomer(SqlMainContext.MainThreadModalDialog)
+export class MainThreadModalDialog implements MainThreadModalDialogShape {
+	private readonly _proxy: ExtHostModalDialogsShape;
+	private readonly _dialogs = new Map<number, WebViewDialog>();
+
+	constructor(
+		context: IExtHostContext,
+		@IInstantiationService private readonly _instantiationService: IInstantiationService
+	) {
+		this._proxy = context.getProxy(SqlExtHostContext.ExtHostModalDialogs);
+	}
+
+	dispose(): void {
+		throw new Error('Method not implemented.');
+	}
+
+	$createDialog(handle: number): void {
+		const dialog = this._instantiationService.createInstance(WebViewDialog);
+
+		this._dialogs.set(handle, dialog);
+		dialog.onMessage(args => {
+			this._proxy.$onMessage(handle, args);
+		});
+
+		dialog.onClosed(args => {
+			this._proxy.$onClosed(handle);
+		});
+	}
+
+	$disposeDialog(handle: number): void {
+		const dialog = this._dialogs.get(handle);
+		dialog.close();
+	}
+
+	$setTitle(handle: number, value: string): void {
+		const dialog = this._dialogs.get(handle);
+		dialog.headerTitle = value;
+	}
+
+	$setHtml(handle: number, value: string): void {
+		const dialog = this._dialogs.get(handle);
+		dialog.html = value;
+	}
+
+	$show(handle: number): void {
+		const dialog = this._dialogs.get(handle);
+		dialog.render();
+		dialog.open();
+	}
+
+	async $sendMessage(handle: number, message: any): Promise<boolean> {
+		const dialog = this._dialogs.get(handle);
+		dialog.sendMessage(message);
+		return Promise.resolve(true);
+	}
+}