broadcast should support target window

src/vs/workbench/electron-main/windows.ts

@@ -234,9 +234,16 @@ export class WindowsManager {
 			storage.setItem(WindowsManager.themeStorageKey, theme);
 		});
 
-		ipc.on('vscode:broadcast', (event: Event, windowId: number, broadcast: { channel: string; payload: any; }) => {
+		ipc.on('vscode:broadcast', (event: Event, windowId: number, target: string, broadcast: { channel: string; payload: any; }) => {
 			if (broadcast.channel && broadcast.payload) {
-				this.sendToAll('vscode:broadcast', broadcast, [windowId]);
+				if (target) {
+					let targetWindow = this.findWindow(target);
+					if (targetWindow && targetWindow.win.id !== windowId) {
+						targetWindow.send('vscode:broadcast', broadcast);
+					}
+				} else {
+					this.sendToAll('vscode:broadcast', broadcast, [windowId]);
+				}
 			}
 		});
 

src/vs/workbench/services/thread/electron-browser/threadService.ts

@@ -142,7 +142,7 @@ class PluginHostProcessManager {
 						payload: {
 							port: port
 						}
-					});
+					}, config.env.pluginDevelopmentPath /* target */);
 				}
 
 				// Messages from Plugin host
@@ -211,7 +211,7 @@ class PluginHostProcessManager {
 							this.windowService.broadcast({
 								channel: PLUGIN_LOG_BROADCAST_CHANNEL,
 								payload: logEntry
-							});
+							}, config.env.pluginDevelopmentPath /* target */);
 						}
 					}
 

src/vs/workbench/services/window/electron-browser/windowService.ts

@@ -33,7 +33,7 @@ export interface IWindowService {
 
 	registerWindow(win: ElectronWindow): void;
 
-	broadcast(b: IBroadcast): void;
+	broadcast(b: IBroadcast, target?: string): void;
 
 	onBroadcast: EventProvider<(b: IBroadcast) => void>;
 }
@@ -72,8 +72,8 @@ export class WindowService implements IWindowService {
 		this.win = win;
 	}
 
-	public broadcast(b: IBroadcast): void {
-		ipc.send('vscode:broadcast', this.getWindowId(), {
+	public broadcast(b: IBroadcast, target?: string): void {
+		ipc.send('vscode:broadcast', this.getWindowId(), target, {
 			channel: b.channel,
 			payload: b.payload
 		});