WindowServer+Keymap+LibGUI: Add widget to display current keymap

Userland/Libraries/LibGUI/Event.h

@@ -67,6 +67,7 @@ public:
         WM_SuperKeyPressed,
         WM_SuperSpaceKeyPressed,
         WM_WorkspaceChanged,
+        WM_KeymapChanged,
         __End_WM_Events,
     };
 
@@ -228,6 +229,20 @@ private:
     const unsigned m_current_column;
 };
 
+class WMKeymapChangedEvent : public WMEvent {
+public:
+    explicit WMKeymapChangedEvent(int client_id, String const& keymap)
+        : WMEvent(Event::Type::WM_KeymapChanged, client_id, 0)
+        , m_keymap(keymap)
+    {
+    }
+
+    String const& keymap() const { return m_keymap; }
+
+private:
+    const String m_keymap;
+};
+
 class MultiPaintEvent final : public Event {
 public:
     explicit MultiPaintEvent(Vector<Gfx::IntRect, 32> rects, Gfx::IntSize const& window_size)

Userland/Libraries/LibGUI/WindowManagerServerConnection.cpp

@@ -70,4 +70,10 @@ void WindowManagerServerConnection::workspace_changed(i32 wm_id, u32 row, u32 co
         Core::EventLoop::current().post_event(*window, make<WMWorkspaceChangedEvent>(wm_id, row, column));
 }
 
+void WindowManagerServerConnection::keymap_changed(i32 wm_id, String const& keymap)
+{
+    if (auto* window = Window::from_window_id(wm_id))
+        Core::EventLoop::current().post_event(*window, make<WMKeymapChangedEvent>(wm_id, keymap));
+}
+
 }

Userland/Libraries/LibGUI/WindowManagerServerConnection.h

@@ -35,6 +35,7 @@ private:
     virtual void super_key_pressed(i32) override;
     virtual void super_space_key_pressed(i32) override;
     virtual void workspace_changed(i32, u32, u32) override;
+    virtual void keymap_changed(i32, String const&) override;
 };
 
 }