Force a redraw of terminal after OS resumes

Part of #58167

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

@@ -3,7 +3,7 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import { app, ipcMain as ipc, systemPreferences, shell, Event, contentTracing, protocol } from 'electron';
+import { app, ipcMain as ipc, systemPreferences, shell, Event, contentTracing, protocol, powerMonitor } from 'electron';
 import { IProcessEnvironment, isWindows, isMacintosh } from 'vs/base/common/platform';
 import { WindowsManager } from 'vs/code/electron-main/windows';
 import { IWindowsService, OpenContext, ActiveWindowManager } from 'vs/platform/windows/common/windows';
@@ -260,6 +260,12 @@ export class CodeApplication extends Disposable {
 		ipc.on('vscode:openDevTools', (event: Event) => event.sender.openDevTools());
 
 		ipc.on('vscode:reloadWindow', (event: Event) => event.sender.reload());
+
+		powerMonitor.on('resume', () => { // After waking up from sleep
+			if (this.windowsMainService) {
+				this.windowsMainService.sendToAll('vscode:osResume', undefined);
+			}
+		});
 	}
 
 	private onUnexpectedError(err: Error): void {

src/vs/workbench/parts/terminal/common/terminal.ts

@@ -427,6 +427,11 @@ export interface ITerminalInstance {
 	 */
 	dispose(immediate?: boolean): void;
 
+	/**
+	 * Forces the terminal to redraw its viewport.
+	 */
+	forceRedraw(): void;
+
 	/**
 	 * Registers a link matcher, allowing custom link patterns to be matched and handled.
 	 * @param regex The regular expression the search for, specifically this searches the

src/vs/workbench/parts/terminal/electron-browser/terminalInstance.ts

@@ -620,6 +620,10 @@ export class TerminalInstance implements ITerminalInstance {
 		this._disposables = lifecycle.dispose(this._disposables);
 	}
 
+	public forceRedraw(): void {
+		this._xterm.refresh(0, this._xterm.rows - 1);
+	}
+
 	public focus(force?: boolean): void {
 		if (!this._xterm) {
 			return;

src/vs/workbench/parts/terminal/electron-browser/terminalService.ts

@@ -69,6 +69,9 @@ export class TerminalService extends AbstractTerminalService implements ITermina
 				});
 			}
 		});
+		ipc.on('vscode:osResume', () => {
+			this.getActiveTab().terminalInstances.forEach(instance => instance.forceRedraw());
+		});
 	}
 
 	public createTerminal(shell: IShellLaunchConfig = {}, wasNewTerminalAction?: boolean): ITerminalInstance {