config: allow destroying keymaps

jay-config/src/_private/client.rs

@@ -782,6 +782,10 @@ impl Client {
         has
     }
 
+    pub fn destroy_keymap(&self, keymap: Keymap) {
+        self.send(&ClientMessage::DestroyKeymap { keymap })
+    }
+
     pub fn seat_set_keymap(&self, seat: Seat, keymap: Keymap) {
         self.send(&ClientMessage::SeatSetKeymap { seat, keymap })
     }

jay-config/src/_private/ipc.rs

@@ -382,6 +382,9 @@ pub enum ClientMessage<'a> {
         fds: Vec<(i32, i32)>,
     },
     DisableDefaultSeat,
+    DestroyKeymap {
+        keymap: Keymap,
+    },
 }
 
 #[derive(Serialize, Deserialize, Debug)]

jay-config/src/keyboard/mod.rs

@@ -59,6 +59,15 @@ impl Keymap {
     pub fn is_invalid(self) -> bool {
         self == Self::INVALID
     }
+
+    /// Destroys this reference to the keymap.
+    ///
+    /// Seats that are currently using this keymap are unaffected.
+    pub fn destroy(self) {
+        if self.is_valid() {
+            get!().destroy_keymap(self);
+        }
+    }
 }
 
 /// Parses a keymap.