fix webxdc title not updated in document title changes

fixes #3412

src/main/deltachat/webxdc.ts

@@ -25,6 +25,7 @@ import { DesktopSettings } from '../desktop_settings'
 import { window as main_window } from '../windows/main'
 import { writeTempFileFromBase64 } from '../ipc'
 import { refresh as refreshTitleMenu } from '../menu'
+import { T } from '@deltachat/jsonrpc-client'
 
 const open_apps: {
   [instanceId: string]: {
@@ -233,11 +234,7 @@ export default class DCWebxdc extends SplitOut {
               'webxdc-preload.js'
             ),
           },
-          title: `${
-            webxdcInfo.document
-              ? truncateText(webxdcInfo.document, 32) + ' - '
-              : ''
-          }${truncateText(webxdcInfo.name, 42)} – ${chatName}`,
+          title: makeTitle(webxdcInfo, chatName),
           icon: app_icon || undefined,
           width: 375,
           height: 667,
@@ -604,6 +601,23 @@ If you think that's a bug and you need that permission, then please open an issu
         }
       }
     )
+
+    ipcMain.handle(
+      'webxdc:message-changed',
+      async (_ev, accountId: number, instanceId: number) => {
+        const instance = open_apps[`${accountId}.${instanceId}`]
+        if (instance) {
+          const { chatId, webxdcInfo } = await this.rpc.getMessage(
+            accountId,
+            instanceId
+          )
+          const { name } = await this.rpc.getBasicChatInfo(accountId, chatId)
+          if (instance.win && webxdcInfo) {
+            instance.win.title = makeTitle(webxdcInfo, name)
+          }
+        }
+      }
+    )
     ipcMain.handle(
       'webxdc:instance-deleted',
       (_ev, accountId: number, instanceId: number) => {
@@ -627,6 +641,12 @@ If you think that's a bug and you need that permission, then please open an issu
   }
 }
 
+function makeTitle(webxdcInfo: T.WebxdcMessageInfo, chatName: string): string {
+  return `${
+    webxdcInfo.document ? truncateText(webxdcInfo.document, 32) + ' - ' : ''
+  }${truncateText(webxdcInfo.name, 42)} – ${chatName}`
+}
+
 function partitionFromAccountId(accountId: number) {
   return `persist:webxdc_${accountId}`
 }

src/renderer/runtime.ts

@@ -89,6 +89,7 @@ interface Runtime {
   deleteWebxdcAccountData(accountId: number): Promise<void>
   closeAllWebxdcInstances(): void
   notifyWebxdcStatusUpdate(accountId: number, instanceId: number): void
+  notifyWebxdcMessageChanged(accountId: number, instanceId: number): void
   notifyWebxdcInstanceDeleted(accountId: number, instanceId: number): void
 
   // control app
@@ -179,6 +180,9 @@ class Browser implements Runtime {
   notifyWebxdcStatusUpdate(_accountId: number, _instanceId: number): void {
     throw new Error('Method not implemented.')
   }
+  notifyWebxdcMessageChanged(_accountId: number, _instanceId: number): void {
+    throw new Error('Method not implemented.')
+  }
   notifyWebxdcInstanceDeleted(_accountId: number, _instanceId: number): void {
     throw new Error('Method not implemented.')
   }
@@ -366,6 +370,9 @@ class Electron implements Runtime {
   notifyWebxdcStatusUpdate(accountId: number, instanceId: number): void {
     ipcBackend.invoke('webxdc:status-update', accountId, instanceId)
   }
+  notifyWebxdcMessageChanged(accountId: number, instanceId: number): void {
+    ipcBackend.invoke('webxdc:message-changed', accountId, instanceId)
+  }
   notifyWebxdcInstanceDeleted(accountId: number, instanceId: number): void {
     ipcBackend.invoke('webxdc:instance-deleted', accountId, instanceId)
   }

src/renderer/system-integration/webxdc.ts

@@ -9,6 +9,9 @@ export function initWebxdc() {
   BackendRemote.on('WebxdcStatusUpdate', (accountId, { msgId }) => {
     runtime.notifyWebxdcStatusUpdate(accountId, msgId)
   })
+  BackendRemote.on('MsgsChanged', (accountId, { msgId }) => {
+    runtime.notifyWebxdcMessageChanged(accountId, msgId)
+  })
   BackendRemote.on('WebxdcInstanceDeleted', (accountId, { msgId }) => {
     runtime.notifyWebxdcInstanceDeleted(accountId, msgId)
   })