reconfigure terminals on DPI change (fixes #576)

app/lib/app.ts

@@ -1,4 +1,5 @@
 import { app, ipcMain, Menu, Tray, shell } from 'electron'
+import * as electron from 'electron'
 import { loadConfig } from './config'
 import { Window, WindowOptions } from './window'
 
@@ -21,6 +22,10 @@ export class Application {
         app.commandLine.appendSwitch('lang', 'EN')
     }
 
+    init () {
+        electron.screen.on('display-metrics-changed', () => this.broadcast('host:display-metrics-changed'))        
+    }
+
     async newWindow (options?: WindowOptions): Promise<Window> {
         let window = new Window(options)
         this.windows.push(window)

app/lib/index.ts

@@ -58,5 +58,6 @@ app.on('ready', () => {
             }
         ]))
     }
+    application.init()
     application.newWindow({ hidden: argv.hidden })
 })

terminus-core/src/services/hostApp.service.ts

@@ -31,6 +31,7 @@ export class HostAppService {
     private configChangeBroadcast = new Subject<void>()
     private windowCloseRequest = new Subject<void>()
     private windowMoved = new Subject<void>()
+    private displayMetricsChanged = new Subject<void>()
     private logger: Logger
     private windowId: number
 
@@ -43,6 +44,7 @@ export class HostAppService {
     get configChangeBroadcast$ (): Observable<void> { return this.configChangeBroadcast }
     get windowCloseRequest$ (): Observable<void> { return this.windowCloseRequest }
     get windowMoved$ (): Observable<void> { return this.windowMoved }
+    get displayMetricsChanged$ (): Observable<void> { return this.displayMetricsChanged }
 
     constructor (
         private zone: NgZone,
@@ -86,6 +88,10 @@ export class HostAppService {
             this.zone.run(() => this.windowMoved.next())
         })
 
+        electron.ipcRenderer.on('host:display-metrics-changed', () => {
+            this.zone.run(() => this.displayMetricsChanged.next())
+        })
+
         electron.ipcRenderer.on('host:second-instance', (_$event, argv: any, cwd: string) => this.zone.run(() => {
             this.logger.info('Second instance', argv)
             const op = argv._[0]

terminus-terminal/src/components/baseTerminalTab.component.ts

@@ -265,6 +265,10 @@ export class BaseTerminalTabComponent extends BaseTabComponent implements OnInit
             this.hostApp.windowMoved$.subscribe(() => setTimeout(() => {
                 this.configure()
             }, 250)),
+
+            this.hostApp.displayMetricsChanged$.subscribe(() => setTimeout(() => {
+                this.configure()
+            }, 250)),
         ]
     }