From 8bc19de599ad778a352ceb4477c4aeabde371d1d Mon Sep 17 00:00:00 2001
From: Haapy <haapycoding@putaindemerde.fr>
Date: Thu, 14 May 2026 23:50:35 +0000
Subject: [PATCH] aaaa

---
 src-tauri/src/x11mod.rs | 59 ++++++++++++++++++++++++++++++++++++++---
 1 file changed, 56 insertions(+), 3 deletions(-)

diff --git a/src-tauri/src/x11mod.rs b/src-tauri/src/x11mod.rs
index 646cb99..9e6c17c 100644
--- a/src-tauri/src/x11mod.rs
+++ b/src-tauri/src/x11mod.rs
@@ -7,10 +7,12 @@ use x11rb::atom_manager;
 use x11rb::connection::Connection;
 use x11rb::protocol::xproto::{
     AtomEnum, ChangeWindowAttributesAux, ClientMessageEvent, ConfigureWindowAux,
-    ConnectionExt as XprotoConnectionExt, EventMask, StackMode,
+    ConnectionExt as XprotoConnectionExt, EventMask, StackMode, UnmapNotifyEvent,
+    UNMAP_NOTIFY_EVENT,
 };
 use x11rb::protocol::Event;
 use x11rb::rust_connection::RustConnection;
+use x11rb::wrapper::ConnectionExt as _;
 
 atom_manager! {
     pub Atoms: AtomsCookie {
@@ -172,9 +174,16 @@ pub async fn app_launch(
     // Detach: we don't wait() — Tauri exiting will SIGHUP it via the X11 parent.
     std::mem::forget(child);
 
+    eprintln!(
+        "[infinite] app_launch: command={:?} pid={} tauri_xid={:#x}",
+        opts.command, root_pid, parent_xid
+    );
+
     let client_xid = wait_for_window_by_pid(&c, root_pid, Duration::from_secs(20))
         .ok_or_else(|| "could not find window for launched process".to_string())?;
 
+    eprintln!("[infinite] found client window {:#x} for pid {}", client_xid, root_pid);
+
     embed_window(&c, client_xid, parent_xid)?;
 
     let title = read_window_title(&c, client_xid).unwrap_or_else(|| opts.command.clone());
@@ -279,6 +288,30 @@ pub fn app_close(app: AppHandle, state: State<'_, X11State>, xid: u32) -> Result
 }
 
 fn embed_window(c: &X11Conn, client_xid: u32, parent_xid: u32) -> Result<(), String> {
+    eprintln!(
+        "[infinite] embed: client={:#x} -> parent={:#x}",
+        client_xid, parent_xid
+    );
+
+    // XWithdrawWindow protocol: unmap then send synthetic UnmapNotify to root so
+    // the WM unmanages this window. Without this step Mutter et al. keep treating
+    // it as a top-level even after reparenting.
+    let _ = c.conn.unmap_window(client_xid);
+    let unmap_event = UnmapNotifyEvent {
+        response_type: UNMAP_NOTIFY_EVENT,
+        sequence: 0,
+        event: c.root,
+        window: client_xid,
+        from_configure: false,
+    };
+    let _ = c.conn.send_event(
+        false,
+        c.root,
+        EventMask::SUBSTRUCTURE_NOTIFY | EventMask::SUBSTRUCTURE_REDIRECT,
+        unmap_event,
+    );
+    let _ = c.conn.sync();
+
     // Listen for destroy / property changes on the embedded window.
     c.conn
         .change_window_attributes(
@@ -292,8 +325,7 @@ fn embed_window(c: &X11Conn, client_xid: u32, parent_xid: u32) -> Result<(), Str
     c.conn
         .reparent_window(client_xid, parent_xid, 0, 0)
         .map_err(|e| e.to_string())?;
-
-    c.conn.map_window(client_xid).map_err(|e| e.to_string())?;
+    let _ = c.conn.sync();
 
     // Stack above the webview's GDK X11 surface (siblings under Tauri toplevel).
     c.conn
@@ -303,6 +335,7 @@ fn embed_window(c: &X11Conn, client_xid: u32, parent_xid: u32) -> Result<(), Str
         )
         .map_err(|e| e.to_string())?;
 
+    c.conn.map_window(client_xid).map_err(|e| e.to_string())?;
     c.conn.flush().map_err(|e| e.to_string())?;
 
     // Inform the client it is now embedded (XEmbed protocol).
@@ -315,6 +348,26 @@ fn embed_window(c: &X11Conn, client_xid: u32, parent_xid: u32) -> Result<(), Str
     let _ = c.conn.send_event(false, client_xid, EventMask::NO_EVENT, event);
     c.conn.flush().map_err(|e| e.to_string())?;
 
+    // Verify the reparent took effect at the X11 level. If it didn't, the call
+    // succeeded but something (WM, compositor) reverted it.
+    let tree = c
+        .conn
+        .query_tree(client_xid)
+        .map_err(|e| e.to_string())?
+        .reply()
+        .map_err(|e| e.to_string())?;
+    eprintln!(
+        "[infinite] after reparent: parent={:#x} (wanted {:#x}), root={:#x}",
+        tree.parent, parent_xid, tree.root
+    );
+    if tree.parent != parent_xid {
+        return Err(format!(
+            "reparent did not stick: window {:#x} parent is {:#x}, not {:#x}. \
+             Likely a Wayland session — try logging in to 'Ubuntu on Xorg'.",
+            client_xid, tree.parent, parent_xid
+        ));
+    }
+
     Ok(())
 }