Create fake app info for unknown windows

src/AppSystem/App.vala

@@ -24,7 +24,7 @@ public class Dock.App : Object {
     public signal void removed ();
 
     public bool pinned { get; construct set; }
-    public GLib.DesktopAppInfo app_info { get; construct; }
+    public Dock.AppInfo app_info { get; construct; }
 
     public bool count_visible { get; private set; default = false; }
     public int64 current_count { get; private set; default = 0; }
@@ -55,7 +55,7 @@ public class Dock.App : Object {
 
     private SimpleAction pinned_action;
 
-    public App (GLib.DesktopAppInfo app_info, bool pinned) {
+    public App (Dock.AppInfo app_info, bool pinned) {
         Object (app_info: app_info, pinned: pinned);
     }
 

src/AppSystem/AppInfo.vala

@@ -0,0 +1,107 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0
+ * SPDX-FileCopyrightText: 2025 elementary, Inc. (https://elementary.io)
+ */
+
+public class Dock.AppInfo : GLib.Object {
+    private const string[] NULL_ACTIONS = {};
+    private GLib.Icon fallback_icon = new GLib.ThemedIcon ("application-default-icon");
+
+    public GLib.DesktopAppInfo? desktop_app_info { get; construct; }
+
+    private string _fake_id = "Unknown";
+    public string? fake_id {
+        private get {
+            return _fake_id;
+        }
+        set {
+            _fake_id = value ?? "Unknown";
+        }
+    }
+
+    private string _fake_name = "Unknown";
+    public string? fake_name {
+        private get {
+            return _fake_name;
+        }
+        set {
+            _fake_name = value ?? "Unknown";
+        }
+    }
+
+    public AppInfo (GLib.DesktopAppInfo? desktop_app_info) {
+        Object (desktop_app_info: desktop_app_info);
+    }
+
+    public unowned string get_id () {
+        if (desktop_app_info == null) {
+            return fake_id;
+        }
+
+        return desktop_app_info.get_id ();
+    }
+
+    public unowned string get_display_name () {
+        if (desktop_app_info == null) {
+            return fake_name;
+        }
+
+        return desktop_app_info.get_display_name ();
+    }
+
+    public unowned GLib.Icon get_icon () {
+        if (desktop_app_info == null) {
+            return fallback_icon;
+        }
+
+        return desktop_app_info.get_icon () ?? fallback_icon;
+    }
+
+    public bool get_boolean (string key) {
+        if (desktop_app_info == null) {
+            return false;
+        }
+
+        return desktop_app_info.get_boolean (key);
+    }
+
+    public string get_string (string key) {
+        if (desktop_app_info == null) {
+            return "";
+        }
+
+        return desktop_app_info.get_string (key);
+    }
+
+    public unowned string[] list_actions () {
+        if (desktop_app_info == null) {
+            return NULL_ACTIONS;
+        }
+
+        return desktop_app_info.list_actions ();
+    }
+
+    public string get_action_name (string action_name) {
+        if (desktop_app_info == null) {
+            return "Something went wrong if you see this";
+        }
+
+        return desktop_app_info.get_action_name (action_name);
+    }
+
+    public void launch_action (string action_name, GLib.AppLaunchContext launch_context) {
+        if (desktop_app_info == null) {
+            return;
+        }
+
+        desktop_app_info.launch_action (action_name, launch_context);
+    }
+
+    public bool launch (GLib.List<GLib.File>? files, GLib.AppLaunchContext? context) throws GLib.Error {
+        if (desktop_app_info == null) {
+            return false;
+        }
+
+        return desktop_app_info.launch (files, context);
+    }
+}

src/AppSystem/AppSystem.vala

@@ -31,15 +31,14 @@ public class Dock.AppSystem : Object, UnityClient {
 
     public async void load () {
         foreach (string app_id in settings.get_strv ("launchers")) {
-            var app_info = new GLib.DesktopAppInfo (app_id);
-            add_app (app_info, true);
+            add_app (new Dock.AppInfo (new GLib.DesktopAppInfo (app_id)), true);
         }
 
         yield sync_windows ();
         WindowSystem.get_default ().notify["windows"].connect (sync_windows);
     }
 
-    private App add_app (DesktopAppInfo app_info, bool pinned) {
+    private App add_app (Dock.AppInfo app_info, bool pinned) {
         var app = new App (app_info, pinned);
         id_to_app[app_info.get_id ()] = app;
         app.removed.connect ((_app) => id_to_app.remove (_app.app_info.get_id ()));
@@ -54,9 +53,12 @@ public class Dock.AppSystem : Object, UnityClient {
         foreach (var window in windows) {
             App? app = id_to_app[window.app_id];
             if (app == null) {
-                var app_info = new GLib.DesktopAppInfo (window.app_id);
-                if (app_info == null) {
-                    continue;
+                var desktop_app_info = new GLib.DesktopAppInfo (window.app_id);
+                var app_info = new Dock.AppInfo (desktop_app_info);
+
+                if (desktop_app_info == null) {
+                    app_info.fake_name = window.title != null ? window.title : window.app_id;
+                    app_info.fake_id = window.app_id;
                 }
 
                 app = add_app (app_info, false);
@@ -85,14 +87,14 @@ public class Dock.AppSystem : Object, UnityClient {
             return;
         }
 
-        var app_info = new DesktopAppInfo (app_id);
+        var desktop_app_info = new DesktopAppInfo (app_id);
 
-        if (app_info == null) {
+        if (desktop_app_info == null) {
             warning ("App not found: %s", app_id);
             return;
         }
 
-        add_app (app_info, true);
+        add_app (new Dock.AppInfo (desktop_app_info), true);
     }
 
     public void remove_app_by_id (string app_id) {

src/AppSystem/Launcher.vala

@@ -232,7 +232,9 @@ public class Dock.Launcher : BaseItem {
                 }
                 break;
             case Gdk.BUTTON_SECONDARY:
-                popover.popup ();
+                if (app.app_info.desktop_app_info != null) {
+                    popover.popup ();
+                }
                 break;
         }
     }

src/ItemManager.vala

@@ -84,7 +84,7 @@
             }
 
             var file = (File) drop_target_file.get_value ().get_object ();
-            var app_info = new DesktopAppInfo.from_filename (file.get_path ());
+            var app_info = new GLib.DesktopAppInfo.from_filename (file.get_path ());
 
             if (app_info == null) {
                 return;

src/WindowSystem/Window.vala

@@ -6,8 +6,8 @@
 
 public class Dock.Window : GLib.Object {
     public uint64 uid { get; construct set; }
-
     public string app_id { get; private set; default = ""; }
+    public string? title { get; private set; default = null; }
     public bool has_focus { get; private set; default = false; }
     public int workspace_index { get; private set; default = 0; }
     public int64 time_appeared_on_workspace { get; private set; default = 0; }
@@ -23,6 +23,10 @@ public class Dock.Window : GLib.Object {
             app_id = properties["app-id"].get_string ();
         }
 
+        if ("title" in properties) {
+            title = properties["title"].get_string ();
+        }
+
         if ("has-focus" in properties) {
             has_focus = (bool) properties["has-focus"];
         }

src/meson.build

@@ -5,6 +5,7 @@ sources = [
     'ItemManager.vala',
     'MainWindow.vala',
     'AppSystem' / 'App.vala',
+    'AppSystem' / 'AppInfo.vala',
     'AppSystem' / 'AppSystem.vala',
     'AppSystem' / 'Launcher.vala',
     'AppSystem' / 'PoofPopover.vala',