wayland: add a generic wayland client

src/wl_usr/usr_ifs/usr_wl_buffer.rs

@@ -0,0 +1,47 @@
+use {
+    crate::{
+        utils::{
+            buffd::{MsgParser, MsgParserError},
+            clonecell::CloneCell,
+        },
+        wire::{wl_buffer::*, WlBufferId},
+        wl_usr::{usr_object::UsrObject, UsrCon},
+    },
+    std::rc::Rc,
+};
+
+pub struct UsrWlBuffer {
+    pub id: WlBufferId,
+    pub con: Rc<UsrCon>,
+    pub owner: CloneCell<Option<Rc<dyn UsrWlBufferOwner>>>,
+}
+
+pub trait UsrWlBufferOwner {
+    fn release(&self) {}
+}
+
+impl UsrWlBuffer {
+    fn release(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let _ev: Release = self.con.parse(self, parser)?;
+        if let Some(owner) = self.owner.get() {
+            owner.release();
+        }
+        Ok(())
+    }
+}
+
+usr_object_base! {
+    UsrWlBuffer, WlBuffer;
+
+    RELEASE => release,
+}
+
+impl UsrObject for UsrWlBuffer {
+    fn destroy(&self) {
+        self.con.request(Destroy { self_id: self.id });
+    }
+
+    fn break_loops(&self) {
+        self.owner.take();
+    }
+}