wayland: add a generic wayland client

src/wl_usr/usr_ifs/usr_wl_seat.rs

@@ -0,0 +1,78 @@
+use {
+    crate::{
+        utils::{
+            buffd::{MsgParser, MsgParserError},
+            clonecell::CloneCell,
+        },
+        wire::{wl_seat::*, WlSeatId},
+        wl_usr::{usr_ifs::usr_wl_pointer::UsrWlPointer, usr_object::UsrObject, UsrCon},
+    },
+    std::{cell::Cell, rc::Rc},
+};
+
+pub struct UsrWlSeat {
+    pub id: WlSeatId,
+    pub con: Rc<UsrCon>,
+    pub owner: CloneCell<Option<Rc<dyn UsrWlSeatOwner>>>,
+}
+
+pub trait UsrWlSeatOwner {
+    fn capabilities(self: Rc<Self>, value: u32) {
+        let _ = value;
+    }
+
+    fn name(&self, name: &str) {
+        let _ = name;
+    }
+}
+
+impl UsrWlSeat {
+    pub fn get_pointer(&self) -> Rc<UsrWlPointer> {
+        let ptr = Rc::new(UsrWlPointer {
+            id: self.con.id(),
+            con: self.con.clone(),
+            owner: Default::default(),
+            any_scroll_events: Cell::new(false),
+            pending_scroll: Default::default(),
+        });
+        self.con.add_object(ptr.clone());
+        self.con.request(GetPointer {
+            self_id: self.id,
+            id: ptr.id,
+        });
+        ptr
+    }
+
+    fn capabilities(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let ev: Capabilities = self.con.parse(self, parser)?;
+        if let Some(owner) = self.owner.get() {
+            owner.capabilities(ev.capabilities);
+        }
+        Ok(())
+    }
+
+    fn name(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let ev: Name = self.con.parse(self, parser)?;
+        if let Some(owner) = self.owner.get() {
+            owner.name(ev.name);
+        }
+        Ok(())
+    }
+}
+
+usr_object_base! {
+    UsrWlSeat, WlSeat;
+
+    CAPABILITIES => capabilities,
+    NAME => name,
+}
+
+impl UsrObject for UsrWlSeat {
+    fn destroy(&self) {
+        self.con.request(Release { self_id: self.id });
+    }
+
+    fn break_loops(&self) {
+        self.owner.take();
+    }
+}