wayland: add jay_pointer

src/ifs/jay_pointer.rs

@@ -0,0 +1,76 @@
+use {
+    crate::{
+        client::{Client, ClientError},
+        cursor::KnownCursor,
+        ifs::wl_seat::WlSeatGlobal,
+        leaks::Tracker,
+        object::Object,
+        utils::buffd::{MsgParser, MsgParserError},
+        wire::{jay_pointer::*, JayPointerId},
+    },
+    num_traits::FromPrimitive,
+    std::rc::Rc,
+    thiserror::Error,
+};
+
+pub struct JayPointer {
+    pub id: JayPointerId,
+    pub client: Rc<Client>,
+    pub seat: Rc<WlSeatGlobal>,
+    pub tracker: Tracker<Self>,
+}
+
+impl JayPointer {
+    fn destroy(&self, parser: MsgParser<'_, '_>) -> Result<(), JayPointerError> {
+        let _req: Destroy = self.client.parse(self, parser)?;
+        self.client.remove_obj(self)?;
+        Ok(())
+    }
+
+    fn set_known_cursor(&self, parser: MsgParser<'_, '_>) -> Result<(), JayPointerError> {
+        let req: SetKnownCursor = self.client.parse(self, parser)?;
+        let cursor = match KnownCursor::from_u32(req.idx) {
+            Some(c) => c,
+            _ => return Err(JayPointerError::OutOfBounds),
+        };
+        let pointer_node = match self.seat.pointer_node() {
+            Some(n) => n,
+            _ => {
+                // cannot happen
+                return Ok(());
+            }
+        };
+        if pointer_node.node_client_id() != Some(self.client.id) {
+            return Ok(());
+        }
+        self.seat.set_known_cursor(cursor);
+        Ok(())
+    }
+}
+
+object_base! {
+    JayPointer;
+
+    DESTROY => destroy,
+    SET_KNOWN_CURSOR => set_known_cursor,
+}
+
+impl Object for JayPointer {
+    fn num_requests(&self) -> u32 {
+        SET_KNOWN_CURSOR + 1
+    }
+}
+
+simple_add_obj!(JayPointer);
+
+#[derive(Debug, Error)]
+pub enum JayPointerError {
+    #[error("Parsing failed")]
+    MsgParserError(Box<MsgParserError>),
+    #[error(transparent)]
+    ClientError(Box<ClientError>),
+    #[error("Cursor index is out of bounds")]
+    OutOfBounds,
+}
+efrom!(JayPointerError, MsgParserError);
+efrom!(JayPointerError, ClientError);