config: allow handling switch events

jay-config/src/_private/client.rs

@@ -12,7 +12,7 @@ use {
         exec::Command,
         input::{
             acceleration::AccelProfile, capability::Capability, FocusFollowsMouseMode, InputDevice,
-            Seat,
+            Seat, SwitchEvent,
         },
         keyboard::{
             mods::{Modifiers, RELEASE},
@@ -95,6 +95,7 @@ pub(crate) struct Client {
     on_new_drm_device: RefCell<Option<Callback<DrmDevice>>>,
     on_del_drm_device: RefCell<Option<Callback<DrmDevice>>>,
     on_idle: RefCell<Option<Callback>>,
+    on_switch_event: RefCell<HashMap<InputDevice, Callback<SwitchEvent>>>,
     bufs: RefCell<Vec<Vec<u8>>>,
     reload: Cell<bool>,
     read_interests: RefCell<HashMap<PollableId, Interest>>,
@@ -222,6 +223,7 @@ pub unsafe extern "C" fn init(
         on_new_drm_device: Default::default(),
         on_del_drm_device: Default::default(),
         on_idle: Default::default(),
+        on_switch_event: Default::default(),
         bufs: Default::default(),
         reload: Cell::new(false),
         read_interests: Default::default(),
@@ -603,6 +605,16 @@ impl Client {
         *self.on_new_input_device.borrow_mut() = Some(cb(f));
     }
 
+    pub fn on_switch_event<F: FnMut(SwitchEvent) + 'static>(
+        &self,
+        input_device: InputDevice,
+        f: F,
+    ) {
+        self.on_switch_event
+            .borrow_mut()
+            .insert(input_device, cb(f));
+    }
+
     pub fn set_double_click_interval(&self, usec: u64) {
         self.send(&ClientMessage::SetDoubleClickIntervalUsec { usec });
     }
@@ -1258,7 +1270,9 @@ impl Client {
                     run_cb("new input device", &handler, device);
                 }
             }
-            ServerMessage::DelInputDevice { .. } => {}
+            ServerMessage::DelInputDevice { device } => {
+                self.on_switch_event.borrow_mut().remove(&device);
+            }
             ServerMessage::ConnectorConnect { device } => {
                 let handler = self.on_connector_connected.borrow_mut().clone();
                 if let Some(handler) = handler {
@@ -1332,6 +1346,17 @@ impl Client {
                     }
                 }
             }
+            ServerMessage::SwitchEvent {
+                seat,
+                input_device,
+                event,
+            } => {
+                let _ = seat;
+                let cb = self.on_switch_event.borrow().get(&input_device).cloned();
+                if let Some(cb) = cb {
+                    run_cb("switch event", &cb, event);
+                }
+            }
         }
     }
 

jay-config/src/_private/ipc.rs

@@ -2,7 +2,7 @@ use {
     crate::{
         input::{
             acceleration::AccelProfile, capability::Capability, FocusFollowsMouseMode, InputDevice,
-            Seat,
+            Seat, SwitchEvent,
         },
         keyboard::{mods::Modifiers, syms::KeySym, Keymap},
         logging::LogLevel,
@@ -83,6 +83,11 @@ pub enum ServerMessage {
         effective_mods: Modifiers,
         sym: KeySym,
     },
+    SwitchEvent {
+        seat: Seat,
+        input_device: InputDevice,
+        event: SwitchEvent,
+    },
 }
 
 #[derive(Serialize, Deserialize, Debug)]

jay-config/src/input.rs

@@ -138,6 +138,11 @@ impl InputDevice {
     pub fn devnode(self) -> String {
         get!(String::new()).input_device_devnode(self)
     }
+
+    /// Sets a callback that will be run if this device triggers a switch event.
+    pub fn on_switch_event<F: FnMut(SwitchEvent) + 'static>(self, f: F) {
+        get!().on_switch_event(self, f)
+    }
 }
 
 /// A seat.
@@ -479,3 +484,26 @@ pub fn set_double_click_distance(distance: i32) {
 pub fn disable_default_seat() {
     get!().disable_default_seat();
 }
+
+/// An event generated by a switch.
+#[derive(Serialize, Deserialize, Copy, Clone, Debug, Hash, Eq, PartialEq)]
+pub enum SwitchEvent {
+    /// The lid of the device (usually a laptop) has been opened.
+    ///
+    /// This is the default state.
+    LidOpened,
+    /// The lid of the device (usually a laptop) has been closed.
+    ///
+    /// If the device is already in this state when the device is discovered, a synthetic
+    /// event of this kind is generated.
+    LidClosed,
+    /// The device has been converted from tablet to laptop mode.
+    ///
+    /// This is the default state.
+    ConvertedToLaptop,
+    /// The device has been converted from laptop to tablet mode.
+    ///
+    /// If the device is already in this state when the device is discovered, a synthetic
+    /// event of this kind is generated.
+    ConvertedToTablet,
+}