all: implement screen locking

src/state.rs

@@ -15,6 +15,7 @@ use {
         forker::ForkerProxy,
         globals::{Globals, GlobalsError, WaylandGlobal},
         ifs::{
+            ext_session_lock_v1::ExtSessionLockV1,
             wl_drm::WlDrmGlobal,
             wl_seat::{SeatIds, WlSeatGlobal},
             wl_surface::{
@@ -108,6 +109,7 @@ pub struct State {
     pub tracker: Tracker<Self>,
     pub data_offer_ids: NumCell<u64>,
     pub ring: Rc<IoUring>,
+    pub lock: ScreenlockState,
 }
 
 // impl Drop for State {
@@ -122,6 +124,11 @@ impl Debug for State {
     }
 }
 
+pub struct ScreenlockState {
+    pub locked: Cell<bool>,
+    pub lock: CloneCell<Option<Rc<ExtSessionLockV1>>>,
+}
+
 pub struct XWaylandState {
     pub enabled: Cell<bool>,
     pub handler: RefCell<Option<SpawnedFuture<()>>>,
@@ -485,6 +492,7 @@ impl State {
     }
 
     pub fn clear(&self) {
+        self.lock.lock.take();
         self.xwayland.handler.borrow_mut().take();
         self.clients.clear();
         if let Some(config) = self.config.set(None) {