Merge commit 'be3e8236086165e5e45a5a10783823874b3f3ebd' as 'lib/vscode'

lib/vscode/src/vs/base/browser/browser.ts

@@ -0,0 +1,122 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { Emitter, Event } from 'vs/base/common/event';
+import { IDisposable } from 'vs/base/common/lifecycle';
+
+class WindowManager {
+
+	public static readonly INSTANCE = new WindowManager();
+
+	// --- Zoom Level
+	private _zoomLevel: number = 0;
+	private _lastZoomLevelChangeTime: number = 0;
+	private readonly _onDidChangeZoomLevel = new Emitter<number>();
+
+	public readonly onDidChangeZoomLevel: Event<number> = this._onDidChangeZoomLevel.event;
+	public getZoomLevel(): number {
+		return this._zoomLevel;
+	}
+	public getTimeSinceLastZoomLevelChanged(): number {
+		return Date.now() - this._lastZoomLevelChangeTime;
+	}
+	public setZoomLevel(zoomLevel: number, isTrusted: boolean): void {
+		if (this._zoomLevel === zoomLevel) {
+			return;
+		}
+
+		this._zoomLevel = zoomLevel;
+		// See https://github.com/microsoft/vscode/issues/26151
+		this._lastZoomLevelChangeTime = isTrusted ? 0 : Date.now();
+		this._onDidChangeZoomLevel.fire(this._zoomLevel);
+	}
+
+	// --- Zoom Factor
+	private _zoomFactor: number = 1;
+
+	public getZoomFactor(): number {
+		return this._zoomFactor;
+	}
+	public setZoomFactor(zoomFactor: number): void {
+		this._zoomFactor = zoomFactor;
+	}
+
+	// --- Pixel Ratio
+	public getPixelRatio(): number {
+		let ctx: any = document.createElement('canvas').getContext('2d');
+		let dpr = window.devicePixelRatio || 1;
+		let bsr = ctx.webkitBackingStorePixelRatio ||
+			ctx.mozBackingStorePixelRatio ||
+			ctx.msBackingStorePixelRatio ||
+			ctx.oBackingStorePixelRatio ||
+			ctx.backingStorePixelRatio || 1;
+		return dpr / bsr;
+	}
+
+	// --- Fullscreen
+	private _fullscreen: boolean = false;
+	private readonly _onDidChangeFullscreen = new Emitter<void>();
+
+	public readonly onDidChangeFullscreen: Event<void> = this._onDidChangeFullscreen.event;
+	public setFullscreen(fullscreen: boolean): void {
+		if (this._fullscreen === fullscreen) {
+			return;
+		}
+
+		this._fullscreen = fullscreen;
+		this._onDidChangeFullscreen.fire();
+	}
+	public isFullscreen(): boolean {
+		return this._fullscreen;
+	}
+}
+
+/** A zoom index, e.g. 1, 2, 3 */
+export function setZoomLevel(zoomLevel: number, isTrusted: boolean): void {
+	WindowManager.INSTANCE.setZoomLevel(zoomLevel, isTrusted);
+}
+export function getZoomLevel(): number {
+	return WindowManager.INSTANCE.getZoomLevel();
+}
+/** Returns the time (in ms) since the zoom level was changed */
+export function getTimeSinceLastZoomLevelChanged(): number {
+	return WindowManager.INSTANCE.getTimeSinceLastZoomLevelChanged();
+}
+export function onDidChangeZoomLevel(callback: (zoomLevel: number) => void): IDisposable {
+	return WindowManager.INSTANCE.onDidChangeZoomLevel(callback);
+}
+
+/** The zoom scale for an index, e.g. 1, 1.2, 1.4 */
+export function getZoomFactor(): number {
+	return WindowManager.INSTANCE.getZoomFactor();
+}
+export function setZoomFactor(zoomFactor: number): void {
+	WindowManager.INSTANCE.setZoomFactor(zoomFactor);
+}
+
+export function getPixelRatio(): number {
+	return WindowManager.INSTANCE.getPixelRatio();
+}
+
+export function setFullscreen(fullscreen: boolean): void {
+	WindowManager.INSTANCE.setFullscreen(fullscreen);
+}
+export function isFullscreen(): boolean {
+	return WindowManager.INSTANCE.isFullscreen();
+}
+export const onDidChangeFullscreen = WindowManager.INSTANCE.onDidChangeFullscreen;
+
+const userAgent = navigator.userAgent;
+
+export const isEdge = (userAgent.indexOf('Edge/') >= 0);
+export const isOpera = (userAgent.indexOf('Opera') >= 0);
+export const isFirefox = (userAgent.indexOf('Firefox') >= 0);
+export const isWebKit = (userAgent.indexOf('AppleWebKit') >= 0);
+export const isChrome = (userAgent.indexOf('Chrome') >= 0);
+export const isSafari = (!isChrome && (userAgent.indexOf('Safari') >= 0));
+export const isWebkitWebView = (!isChrome && !isSafari && isWebKit);
+export const isIPad = (userAgent.indexOf('iPad') >= 0 || (isSafari && navigator.maxTouchPoints > 0));
+export const isEdgeWebView = isEdge && (userAgent.indexOf('WebView/') >= 0);
+export const isStandalone = (window.matchMedia && window.matchMedia('(display-mode: standalone)').matches);