ShellClients: Introduce an IBusCandidateWindow

Author: leolost2605

src/ShellClients/IBusCandidateWindow.vala

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2026 elementary, Inc. (https://elementary.io)
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ * Authored by: Leonhard Kargl <leo.kargl@proton.me>
+ */
+
+public class Gala.IBusCandidateWindow : PositionedWindow {
+    public InputMethod im { get; construct; }
+
+    public IBusCandidateWindow (InputMethod im, Meta.Window window) {
+        Object (im: im, window: window);
+    }
+
+    construct {
+        im.notify["cursor-location"].connect (position_window);
+    }
+
+    protected override void get_window_position (Mtk.Rectangle window_rect, out int x, out int y) {
+        x = (int) (im.cursor_location.origin.x + im.cursor_location.size.width);
+        y = (int) (im.cursor_location.origin.y + im.cursor_location.size.height);
+    }
+}

src/ShellClients/ShellClientsManager.vala

@@ -8,19 +8,20 @@
 public class Gala.ShellClientsManager : Object, GestureTarget {
     private static ShellClientsManager instance;
 
-    public static void init (WindowManager wm) {
+    public static void init (WindowManager wm, InputMethod im) {
         if (instance != null) {
             return;
         }
 
-        instance = new ShellClientsManager (wm);
+        instance = new ShellClientsManager (wm, im);
     }
 
     public static unowned ShellClientsManager? get_instance () {
         return instance;
     }
 
     public WindowManager wm { get; construct; }
+    public InputMethod im { get; construct; }
 
     private NotificationsClient notifications_client;
     private ManagedClient[] protocol_clients = {};
@@ -29,9 +30,10 @@ public class Gala.ShellClientsManager : Object, GestureTarget {
 
     private GLib.HashTable<Meta.Window, PanelWindow> panel_windows = new GLib.HashTable<Meta.Window, PanelWindow> (null, null);
     private GLib.HashTable<Meta.Window, ExtendedBehaviorWindow> positioned_windows = new GLib.HashTable<Meta.Window, ExtendedBehaviorWindow> (null, null);
+    private IBusCandidateWindow? ibus_candidate_window = null;
 
-    private ShellClientsManager (WindowManager wm) {
-        Object (wm: wm);
+    private ShellClientsManager (WindowManager wm, InputMethod im) {
+        Object (wm: wm, im: im);
     }
 
     construct {
@@ -244,6 +246,12 @@ public class Gala.ShellClientsManager : Object, GestureTarget {
         positioned_windows[window].make_modal (dim);
     }
 
+    public void make_ibus_candidate_window (Meta.Window window) requires (ibus_candidate_window == null) {
+        ibus_candidate_window = new IBusCandidateWindow (im, window);
+
+        window.unmanaged.connect_after (() => ibus_candidate_window = null);
+    }
+
     public void propagate (UpdateType update_type, GestureAction action, double progress) {
         foreach (var window in positioned_windows.get_values ()) {
             window.propagate (update_type, action, progress);
@@ -258,7 +266,8 @@ public class Gala.ShellClientsManager : Object, GestureTarget {
         return (
             (window in positioned_windows && positioned_windows[window].modal) ||
             (window in panel_windows) ||
-            NotificationStack.is_notification (window)
+            NotificationStack.is_notification (window) ||
+            window == ibus_candidate_window?.window
         );
     }
 

src/WindowManager.vala

@@ -138,7 +138,7 @@ namespace Gala {
             input_method = new InputMethod (get_display ());
             Clutter.get_default_backend ().set_input_method (input_method);
 
-            ShellClientsManager.init (this);
+            ShellClientsManager.init (this, input_method);
             BlurManager.init (this);
             daemon_manager = new DaemonManager (get_display ());
 

src/meson.build

@@ -46,6 +46,7 @@ gala_bin_sources = files(
     'HotCorners/HotCornerManager.vala',
     'ShellClients/ExtendedBehaviorWindow.vala',
     'ShellClients/HideTracker.vala',
+    'ShellClients/IBusCandidateWindow.vala',
     'ShellClients/ManagedClient.vala',
     'ShellClients/NotificationsClient.vala',
     'ShellClients/PanelWindow.vala',