toggle fullscreen class for #12377

src/vs/code/electron-main/window.ts

@@ -323,6 +323,15 @@ export class VSCodeWindow {
 			this._lastFocusTime = Date.now();
 		});
 
+		// Window Fullscreen
+		this._win.on('enter-full-screen', () => {
+			this.sendWhenReady('vscode:enterFullScreen');
+		});
+
+		this._win.on('leave-full-screen', () => {
+			this.sendWhenReady('vscode:leaveFullScreen');
+		});
+
 		// Window Failed to load
 		this._win.webContents.on('did-fail-load', (event: Event, errorCode: string, errorDescription: string) => {
 			console.warn('[electron event]: fail to load, ', errorDescription);

src/vs/workbench/electron-browser/integration.ts

@@ -129,6 +129,19 @@ export class ElectronIntegration {
 			this.toggleAutoSave();
 		});
 
+		// Fullscreen Events
+		ipc.on('vscode:enterFullScreen', (event) => {
+			this.partService.joinCreation().then(() => {
+				this.partService.addClass('fullscreen');
+			});
+		});
+
+		ipc.on('vscode:leaveFullScreen', (event) => {
+			this.partService.joinCreation().then(() => {
+				this.partService.removeClass('fullscreen');
+			});
+		});
+
 		// Ensure others can listen to zoom level changes
 		browser.setZoomLevel(webFrame.getZoomLevel());