Fix not putting focus in the integrated terminal when it's first shown.

This is a little hacky and we might want to rethink it but should be safe and fine

src/vs/workbench/contrib/terminal/browser/terminal.ts

@@ -59,6 +59,7 @@ export interface ITerminalTab {
 	onDisposed: Event<ITerminalTab>;
 	onInstancesChanged: Event<void>;
 
+	setWillFocus(focus: boolean): void;
 	focusPreviousPane(): void;
 	focusNextPane(): void;
 	resizePane(direction: Direction): void;

src/vs/workbench/contrib/terminal/browser/terminalTab.ts

@@ -219,6 +219,7 @@ export class TerminalTab extends Disposable implements ITerminalTab {
 
 	private _activeInstanceIndex: number;
 	private _isVisible: boolean = false;
+	private _willFocus: boolean = false;
 
 	public get terminalInstances(): ITerminalInstance[] { return this._terminalInstances; }
 
@@ -248,6 +249,16 @@ export class TerminalTab extends Disposable implements ITerminalTab {
 		}
 	}
 
+	/**
+	 * Focus the current active instance, or if there isn't one yet, the first instance added
+	 */
+	setWillFocus(focus: boolean): void {
+		this._willFocus = focus;
+		if (focus && this.activeInstance) {
+			this.activeInstance.focusWhenReady();
+		}
+	}
+
 	public addInstance(shellLaunchConfigOrInstance: IShellLaunchConfig | ITerminalInstance): void {
 		let instance: ITerminalInstance;
 		if ('id' in shellLaunchConfigOrInstance) {
@@ -263,6 +274,10 @@ export class TerminalTab extends Disposable implements ITerminalTab {
 		}
 
 		this._onInstancesChanged.fire();
+
+		if (this.terminalInstances.length === 1 && this._willFocus) {
+			instance.focusWhenReady();
+		}
 	}
 
 	public dispose(): void {

src/vs/workbench/contrib/terminal/browser/terminalView.ts

@@ -67,6 +67,13 @@ export class TerminalViewPane extends ViewPane {
 			}
 			this._onDidChangeViewWelcomeState.fire();
 		});
+
+		this._register(this.onDidFocus(() => {
+			this._terminalService.getActiveTab()?.setWillFocus(true);
+		}));
+		this._register(this.onDidBlur(() => {
+			this._terminalService.getActiveTab()?.setWillFocus(false);
+		}));
 	}
 
 	protected renderBody(container: HTMLElement): void {
@@ -212,10 +219,6 @@ export class TerminalViewPane extends ViewPane {
 		return super.getActionViewItem(action);
 	}
 
-	public focus(): void {
-		this._terminalService.getActiveInstance()?.focusWhenReady(true);
-	}
-
 	public focusFindWidget() {
 		const activeInstance = this._terminalService.getActiveInstance();
 		if (activeInstance && activeInstance.hasSelection() && activeInstance.selection!.indexOf('\n') === -1) {