Add layout-per-window.py script

layout-per-window.py

@@ -0,0 +1,48 @@
+#!/usr/bin/env python
+
+# This script keeps track of the active layout for each window.
+#
+# This script requires i3ipc-python package (install it from a system package
+# manager or pip).
+
+import i3ipc
+
+def on_window_focus(ipc: i3ipc.connection.Connection, event: i3ipc.events.WindowEvent):
+    global windows, prev_focused
+
+    # Save current layout
+    layouts = {input.identifier : input.xkb_active_layout_index
+               for input in ipc.get_inputs()}
+    windows[prev_focused] = layouts
+
+    # Restore layout of the newly focused window
+    if event.container.id in windows:
+        for (kdb_id, layout_index) in windows[event.container.id].items():
+            if layout_index != layouts[kdb_id]:
+                ipc.command(f"input \"{kdb_id}\" xkb_switch_layout {layout_index}")
+                break
+
+    prev_focused = event.container.id
+
+def on_window_close(ipc: i3ipc.connection.Connection, event: i3ipc.events.WindowEvent):
+    global windows
+    if event.container.id in windows:
+        del(windows[event.container.id])
+
+def on_window(ipc: i3ipc.connection.Connection, event: i3ipc.events.WindowEvent):
+    if event.change == "focus":
+        on_window_focus(ipc, event)
+    elif event.change == "close":
+        on_window_close(ipc, event)
+
+if __name__ == "__main__":
+    ipc = i3ipc.Connection()
+    focused = ipc.get_tree().find_focused()
+    if focused:
+        prev_focused = focused.id
+    else:
+        prev_focused = None
+    windows = {}
+
+    ipc.on("window", on_window)
+    ipc.main()