input: update keyboard led state

Cargo.lock

@@ -2716,7 +2716,7 @@ checksum = "e6ecd384b10a64542d77071bd64bd7b231f4ed5940fba55e98c3de13824cf3d7"
 [[package]]
 name = "smithay"
 version = "0.3.0"
-source = "git+https://github.com/Smithay/smithay.git#8854dee7c2f49e9077f10d484b0de9a8e81c587c"
+source = "git+https://github.com/Smithay/smithay.git#4a1b3ea4a1832089bac29fa4f76d57cd24745bde"
 dependencies = [
  "appendlist",
  "bitflags 2.4.2",
@@ -2788,7 +2788,7 @@ dependencies = [
 [[package]]
 name = "smithay-drm-extras"
 version = "0.1.0"
-source = "git+https://github.com/Smithay/smithay.git#8854dee7c2f49e9077f10d484b0de9a8e81c587c"
+source = "git+https://github.com/Smithay/smithay.git#4a1b3ea4a1832089bac29fa4f76d57cd24745bde"
 dependencies = [
  "drm",
  "edid-rs",

src/handlers/mod.rs

@@ -11,8 +11,9 @@ use std::thread;
 use smithay::backend::allocator::dmabuf::Dmabuf;
 use smithay::desktop::{PopupKind, PopupManager};
 use smithay::input::pointer::{CursorIcon, CursorImageStatus, PointerHandle};
-use smithay::input::{Seat, SeatHandler, SeatState};
+use smithay::input::{keyboard, Seat, SeatHandler, SeatState};
 use smithay::output::Output;
+use smithay::reexports::input;
 use smithay::reexports::wayland_server::protocol::wl_data_source::WlDataSource;
 use smithay::reexports::wayland_server::protocol::wl_output::WlOutput;
 use smithay::reexports::wayland_server::protocol::wl_surface::WlSurface;
@@ -73,6 +74,19 @@ impl SeatHandler for State {
         set_data_device_focus(dh, seat, client.clone());
         set_primary_focus(dh, seat, client);
     }
+
+    fn led_state_changed(&mut self, _seat: &Seat<Self>, led_state: keyboard::LedState) {
+        let keyboards = self
+            .niri
+            .devices
+            .iter()
+            .filter(|device| device.has_capability(input::DeviceCapability::Keyboard))
+            .cloned();
+
+        for mut keyboard in keyboards {
+            keyboard.led_update(led_state.into());
+        }
+    }
 }
 delegate_seat!(State);
 delegate_cursor_shape!(State);

src/input.rs

@@ -127,6 +127,17 @@ impl State {
                     }
                 }
 
+                if device.has_capability(input::DeviceCapability::Keyboard) {
+                    if let Some(led_state) = self
+                        .niri
+                        .seat
+                        .get_keyboard()
+                        .map(|keyboard| keyboard.led_state())
+                    {
+                        device.led_update(led_state.into());
+                    }
+                }
+
                 apply_libinput_settings(&self.niri.config.borrow().input, device);
             }
             InputEvent::DeviceRemoved { device } => {