feat: spawn layer shells on correct output

sims/modules/launcher/base.py

@@ -7,6 +7,8 @@ from fabric.widgets.label import Label
 from fabric.widgets.wayland import WaylandWindow as Window
 from gi.repository import Gdk, Gtk
 
+from sims.services.fenster import focused_output_index
+
 
 class LauncherProvider(Protocol):
     def items(self) -> list[Any]: ...
@@ -118,6 +120,7 @@ class FuzzyMenu(Window):
         self._selected_index = 0
         self._scroll_offset = 0
         self._refresh_viewport("")
+        self.monitor = focused_output_index()
         super().show()
         self.search_entry.grab_focus()
 

sims/services/fenster.py

@@ -5,7 +5,7 @@ Provides a singleton I3 connection configured for Fenster's SWAYSOCK.
 """
 
 import os
-from sims.services.i3 import I3
+from sims.services.i3 import I3, I3MessageType
 
 
 _connection: I3 | None = None
@@ -27,3 +27,29 @@ def get_i3_connection() -> I3:
                 I3.SOCKET_PATH = fallback
         _connection = I3()
     return _connection
+
+
+def focused_output_index() -> int:
+    """Index of the currently focused output in active GET_OUTPUTS order.
+
+    Matches the indexing main.spawn_bars uses for `monitor=` so layer-shell
+    windows opened with the same index land on the focused output. Returns 0
+    on any IPC failure or if the focused output cannot be located.
+    """
+    ws_reply = I3.send_command("", I3MessageType.GET_WORKSPACES)
+    if not (ws_reply.is_ok and isinstance(ws_reply.reply, list)):
+        return 0
+    focused_output = next(
+        (ws.get("output") for ws in ws_reply.reply if ws.get("focused")),
+        None,
+    )
+    if not focused_output:
+        return 0
+    out_reply = I3.send_command("", I3MessageType.GET_OUTPUTS)
+    if not (out_reply.is_ok and isinstance(out_reply.reply, list)):
+        return 0
+    active = [o for o in out_reply.reply if o.get("active")]
+    for i, o in enumerate(active):
+        if o.get("name") == focused_output:
+            return i
+    return 0