Merge from vscode 31e03b8ffbb218a87e3941f2b63a249f061fe0e4 (#4986)

src/vs/workbench/api/common/extHostWindow.ts

@@ -0,0 +1,56 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { Event, Emitter } from 'vs/base/common/event';
+import { ExtHostWindowShape, MainContext, MainThreadWindowShape, IMainContext } from './extHost.protocol';
+import { WindowState } from 'vscode';
+import { URI } from 'vs/base/common/uri';
+import { Schemas } from 'vs/base/common/network';
+import { isFalsyOrWhitespace } from 'vs/base/common/strings';
+
+export class ExtHostWindow implements ExtHostWindowShape {
+
+	private static InitialState: WindowState = {
+		focused: true
+	};
+
+	private _proxy: MainThreadWindowShape;
+
+	private _onDidChangeWindowState = new Emitter<WindowState>();
+	readonly onDidChangeWindowState: Event<WindowState> = this._onDidChangeWindowState.event;
+
+	private _state = ExtHostWindow.InitialState;
+	get state(): WindowState { return this._state; }
+
+	constructor(mainContext: IMainContext) {
+		this._proxy = mainContext.getProxy(MainContext.MainThreadWindow);
+		this._proxy.$getWindowVisibility().then(isFocused => this.$onDidChangeWindowFocus(isFocused));
+	}
+
+	$onDidChangeWindowFocus(focused: boolean): void {
+		if (focused === this._state.focused) {
+			return;
+		}
+
+		this._state = { ...this._state, focused };
+		this._onDidChangeWindowState.fire(this._state);
+	}
+
+	openUri(stringOrUri: string | URI): Promise<boolean> {
+		if (typeof stringOrUri === 'string') {
+			try {
+				stringOrUri = URI.parse(stringOrUri);
+			} catch (e) {
+				return Promise.reject(`Invalid uri - '${stringOrUri}'`);
+			}
+		}
+		if (isFalsyOrWhitespace(stringOrUri.scheme)) {
+			return Promise.reject('Invalid scheme - cannot be empty');
+		} else if (stringOrUri.scheme === Schemas.command) {
+			return Promise.reject(`Invalid scheme '${stringOrUri.scheme}'`);
+		}
+		return this._proxy.$openUri(stringOrUri);
+	}
+}