wayland: add capabilities to jay_compositor

src/ifs/jay_compositor.rs

@@ -44,6 +44,7 @@ impl JayCompositorGlobal {
         });
         track!(client, obj);
         client.add_client_obj(&obj)?;
+        obj.send_capabilities();
         Ok(())
     }
 }
@@ -72,7 +73,20 @@ pub struct JayCompositor {
     tracker: Tracker<Self>,
 }
 
+pub struct Cap;
+
+impl Cap {
+    pub const NONE: u16 = 0;
+}
+
 impl JayCompositor {
+    fn send_capabilities(&self) {
+        self.client.event(Capabilities {
+            self_id: self.id,
+            cap: &[Cap::NONE],
+        });
+    }
+
     fn take_screenshot_impl(
         &self,
         id: JayScreenshotId,

src/it/test_ifs/test_jay_compositor.rs

@@ -74,12 +74,24 @@ impl TestJayCompositor {
         self.tran.client_id.set(ClientId::from_raw(ev.client_id));
         Ok(())
     }
+
+    fn handle_seat(&self, parser: MsgParser<'_, '_>) -> Result<(), TestError> {
+        let _ev = Seat::parse_full(parser)?;
+        Ok(())
+    }
+
+    fn handle_capabilities(&self, parser: MsgParser<'_, '_>) -> Result<(), TestError> {
+        let _ev = Capabilities::parse_full(parser)?;
+        Ok(())
+    }
 }
 
 test_object! {
     TestJayCompositor, JayCompositor;
 
     CLIENT_ID => handle_client_id,
+    SEAT => handle_seat,
+    CAPABILITIES => handle_capabilities,
 }
 
 impl TestObject for TestJayCompositor {}

src/wl_usr/usr_ifs/usr_jay_compositor.rs

@@ -1,5 +1,6 @@
 use {
     crate::{
+        ifs::jay_compositor::Cap,
         utils::{
             buffd::{MsgParser, MsgParserError},
             clonecell::CloneCell,
@@ -126,13 +127,25 @@ impl UsrJayCompositor {
         }
         Ok(())
     }
+
+    fn capabilities(&self, parser: MsgParser<'_, '_>) -> Result<(), MsgParserError> {
+        let ev: Capabilities = self.con.parse(self, parser)?;
+        for &cap in ev.cap {
+            match cap {
+                Cap::NONE => {}
+                _ => {}
+            }
+        }
+        Ok(())
+    }
 }
 
 usr_object_base! {
     UsrJayCompositor, JayCompositor;
 
     CLIENT_ID => client_id,
     SEAT => seat,
+    CAPABILITIES => capabilities,
 }
 
 impl UsrObject for UsrJayCompositor {

wire/jay_compositor.txt

@@ -88,3 +88,7 @@ event seat {
     id: u32,
     name: str,
 }
+
+event capabilities {
+    cap: array(pod(u16)),
+}