Removed taskbar (dock) icon

Author: Marksonthegamer

Assets/MATE ENGINE - Scripts/APIs/X11Manager.cs

@@ -359,6 +359,34 @@ public void SetTopmost(bool topmost = true)
             XSendEvent(_display, _rootWindow, false, 0x00100000 | 0x00080000, ref xClient);
             XFlush(_display);
         }
+        
+        public void HideFromTaskbar(bool reallyHide = true)
+        {
+            IntPtr netWmState = XInternAtom(_display, "_NET_WM_STATE", false);
+            IntPtr skipTaskbar = XInternAtom(_display, "_NET_WM_STATE_SKIP_TASKBAR", false);
+
+            if (netWmState == IntPtr.Zero || skipTaskbar == IntPtr.Zero)
+                return;
+
+            XClientMessageEvent msg = new()
+            {
+                type = 33, // ClientMessage
+                display = _display,
+                window = _unityWindow,
+                message_type = netWmState,
+                format = 32,
+                data = new IntPtr[5]
+            };
+            msg.data[0] = new(reallyHide ? 1 : 0);
+            msg.data[1] = skipTaskbar;
+            msg.data[2] = IntPtr.Zero;
+            msg.data[3] = IntPtr.Zero;
+            msg.data[4] = new(1);
+                
+            XSendEvent(_display, _rootWindow, false, 0x10000L | 0x20000L, ref msg);
+            XFlush(_display);
+        }
+
 
         private void SetWindowBorderless()
         {

Assets/MATE ENGINE - System Tray/RemoveTaskbarApp.cs

@@ -1,76 +1,43 @@
 using System;
-using System.Runtime.InteropServices;
 using UnityEngine;
+using X11;
 
 public class RemoveTaskbarApp : MonoBehaviour
 {
-    [DllImport("user32.dll", SetLastError = true)]
-    static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
 
-    [DllImport("user32.dll")]
-    static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
-
-    [DllImport("user32.dll")]
-    static extern int GetWindowLong(IntPtr hWnd, int nIndex);
-
-    [DllImport("user32.dll")]
-    static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
-
-    [DllImport("user32.dll")]
-    static extern bool SetForegroundWindow(IntPtr hWnd);
-
-    const int GWL_EXSTYLE = -20;
-    const int WS_EX_TOOLWINDOW = 0x00000080;
-    const int SW_RESTORE = 9;
-
-    private static IntPtr unityHWND = IntPtr.Zero;
+    private IntPtr _unityHwnd = IntPtr.Zero;
 
     private bool _isHidden = true;
     public bool IsHidden => _isHidden;
 
     void Start()
     {
-#if UNITY_STANDALONE_WIN && !UNITY_EDITOR
-        unityHWND = GetUnityWindow();
-        if (unityHWND != IntPtr.Zero)
+#if UNITY_STANDALONE_LINUX && !UNITY_EDITOR
+        _unityHwnd = X11Manager.Instance.UnityWindow;
+        if (_unityHwnd != IntPtr.Zero)
         {
-            int exStyle = GetWindowLong(unityHWND, GWL_EXSTYLE);
-            SetWindowLong(unityHWND, GWL_EXSTYLE, exStyle | WS_EX_TOOLWINDOW);
+            X11Manager.Instance.HideFromTaskbar();
             _isHidden = true;
         }
 #endif
     }
 
     public void ToggleAppMode()
     {
-#if UNITY_STANDALONE_WIN && !UNITY_EDITOR
-        unityHWND = GetUnityWindow();
+#if UNITY_STANDALONE_WIN && UNITY_EDITOR
         if (unityHWND == IntPtr.Zero)
             return;
 
-        int exStyle = GetWindowLong(unityHWND, GWL_EXSTYLE);
-
         if (_isHidden)
         {
-            SetWindowLong(unityHWND, GWL_EXSTYLE, exStyle & ~WS_EX_TOOLWINDOW);
-            ShowWindow(unityHWND, SW_RESTORE);
-            SetForegroundWindow(unityHWND);
+            X11Manager.Instance.HideFromTaskbar(false);
             _isHidden = false;
         }
         else
         {
-            SetWindowLong(unityHWND, GWL_EXSTYLE, exStyle | WS_EX_TOOLWINDOW);
+            X11Manager.Instance.HideFromTaskbar();
             _isHidden = true;
         }
 #endif
     }
-
-    private IntPtr GetUnityWindow()
-    {
-        string title = Application.productName;
-        IntPtr hwnd = FindWindow(null, title);
-        if (hwnd == IntPtr.Zero)
-            hwnd = FindWindow("UnityWndClass", null);
-        return hwnd;
-    }
 }