Ensure windows are not retained after being destroyed #1008

src/ElectronNET.Host/api/browserWindows.js

@@ -230,7 +230,10 @@ module.exports = (socket, app) => {
             window = app["mainWindow"];
             if (window) {
                 window.reload();
-                windows.push(window);
+                synchronizeWindowRegistry();
+                if (!windows.some((entry) => tryGetWindowId(entry) === window.id)) {
+                    windows.push(window);
+                }
                 electronSocket.emit("BrowserWindowCreated", window.id);
                 return;
             }
@@ -253,21 +256,9 @@ module.exports = (socket, app) => {
             }
         });
         lastOptions = options;
-        window.on("closed", (sender) => {
-            for (let index = 0; index < windows.length; index++) {
-                const windowItem = windows[index];
-                try {
-                    windowItem.id;
-                }
-                catch (error) {
-                    if (error.message === "Object has been destroyed") {
-                        windows.splice(index, 1);
-                        const ids = [];
-                        windows.forEach((x) => ids.push(x.id));
-                        electronSocket.emit("BrowserWindowClosed", ids);
-                    }
-                }
-            }
+        window.on("closed", () => {
+            synchronizeWindowRegistry();
+            emitBrowserWindowClosed();
         });
         app.on("activate", () => {
             // On macOS it's common to re-create a window in the app when the
@@ -703,12 +694,47 @@ module.exports = (socket, app) => {
         getWindowById(id).setBrowserView((0, browserView_1.browserViewMediateService)(browserViewId));
     });
     function getWindowById(id) {
+        const runtimeWindow = electron_1.BrowserWindow.fromId(id);
+        if (runtimeWindow) {
+            return runtimeWindow;
+        }
+        synchronizeWindowRegistry();
         for (let index = 0; index < windows.length; index++) {
             const element = windows[index];
-            if (element.id === id) {
+            if (tryGetWindowId(element) === id) {
                 return element;
             }
         }
+        throw new Error(`BrowserWindow with id '${id}' was not found.`);
+    }
+    function tryGetWindowId(element) {
+        try {
+            return element.id;
+        }
+        catch {
+            return null;
+        }
+    }
+    function synchronizeWindowRegistry() {
+        const runtimeWindows = electron_1.BrowserWindow.getAllWindows();
+        const runtimeWindowIds = new Set(runtimeWindows.map((entry) => entry.id));
+        for (let index = windows.length - 1; index >= 0; index--) {
+            const windowId = tryGetWindowId(windows[index]);
+            if (windowId === null || !runtimeWindowIds.has(windowId)) {
+                windows.splice(index, 1);
+            }
+        }
+        readyToShowWindowsIds = readyToShowWindowsIds.filter((entryId) => runtimeWindowIds.has(entryId));
+    }
+    function emitBrowserWindowClosed() {
+        const ids = [];
+        for (const entry of windows) {
+            const windowId = tryGetWindowId(entry);
+            if (windowId !== null) {
+                ids.push(windowId);
+            }
+        }
+        electronSocket.emit("BrowserWindowClosed", ids);
     }
 };
 //# sourceMappingURL=browserWindows.js.map

src/ElectronNET.Host/api/browserWindows.ts

@@ -255,7 +255,10 @@ export = (socket: Socket, app: Electron.App) => {
       window = app["mainWindow"];
       if (window) {
         window.reload();
-        windows.push(window);
+        synchronizeWindowRegistry();
+        if (!windows.some((entry) => tryGetWindowId(entry) === window.id)) {
+          windows.push(window);
+        }
         electronSocket.emit("BrowserWindowCreated", window.id);
         return;
       }
@@ -283,21 +286,9 @@ export = (socket: Socket, app: Electron.App) => {
 
     lastOptions = options;
 
-    window.on("closed", (sender) => {
-      for (let index = 0; index < windows.length; index++) {
-        const windowItem = windows[index];
-        try {
-          windowItem.id;
-        } catch (error) {
-          if (error.message === "Object has been destroyed") {
-            windows.splice(index, 1);
-
-            const ids = [];
-            windows.forEach((x) => ids.push(x.id));
-            electronSocket.emit("BrowserWindowClosed", ids);
-          }
-        }
-      }
+    window.on("closed", () => {
+      synchronizeWindowRegistry();
+      emitBrowserWindowClosed();
     });
 
     app.on("activate", () => {
@@ -907,11 +898,57 @@ export = (socket: Socket, app: Electron.App) => {
   });
 
   function getWindowById(id: number): Electron.BrowserWindow {
+    const runtimeWindow = BrowserWindow.fromId(id);
+    if (runtimeWindow) {
+      return runtimeWindow;
+    }
+
+    synchronizeWindowRegistry();
+
     for (let index = 0; index < windows.length; index++) {
       const element = windows[index];
-      if (element.id === id) {
+      if (tryGetWindowId(element) === id) {
         return element;
       }
     }
+
+    throw new Error(`BrowserWindow with id '${id}' was not found.`);
+  }
+
+  function tryGetWindowId(element: Electron.BrowserWindow): number | null {
+    try {
+      return element.id;
+    } catch {
+      return null;
+    }
+  }
+
+  function synchronizeWindowRegistry(): void {
+    const runtimeWindows = BrowserWindow.getAllWindows();
+    const runtimeWindowIds = new Set(runtimeWindows.map((entry) => entry.id));
+
+    for (let index = windows.length - 1; index >= 0; index--) {
+      const windowId = tryGetWindowId(windows[index]);
+      if (windowId === null || !runtimeWindowIds.has(windowId)) {
+        windows.splice(index, 1);
+      }
+    }
+
+    readyToShowWindowsIds = readyToShowWindowsIds.filter((entryId) =>
+      runtimeWindowIds.has(entryId),
+    );
+  }
+
+  function emitBrowserWindowClosed(): void {
+    const ids: number[] = [];
+
+    for (const entry of windows) {
+      const windowId = tryGetWindowId(entry);
+      if (windowId !== null) {
+        ids.push(windowId);
+      }
+    }
+
+    electronSocket.emit("BrowserWindowClosed", ids);
   }
 };