portal: implement RemoteDesktop portal

src/wl_usr/usr_ifs/usr_jay_ei_session.rs

@@ -0,0 +1,72 @@
+use {
+    crate::{
+        object::Version,
+        utils::clonecell::CloneCell,
+        wire::{
+            jay_ei_session::{Created, Destroyed, Failed, JayEiSessionEventHandler, Release},
+            JayEiSessionId,
+        },
+        wl_usr::{usr_object::UsrObject, UsrCon},
+    },
+    std::{convert::Infallible, rc::Rc},
+    uapi::OwnedFd,
+};
+
+pub struct UsrJayEiSession {
+    pub id: JayEiSessionId,
+    pub con: Rc<UsrCon>,
+    pub owner: CloneCell<Option<Rc<dyn UsrJayEiSessionOwner>>>,
+    pub version: Version,
+}
+
+pub trait UsrJayEiSessionOwner {
+    fn destroyed(&self) {}
+
+    fn created(&self, fd: &Rc<OwnedFd>) {
+        let _ = fd;
+    }
+
+    fn failed(&self, reason: &str) {
+        let _ = reason;
+    }
+}
+
+impl JayEiSessionEventHandler for UsrJayEiSession {
+    type Error = Infallible;
+
+    fn destroyed(&self, _ev: Destroyed, _slf: &Rc<Self>) -> Result<(), Self::Error> {
+        if let Some(owner) = self.owner.get() {
+            owner.destroyed();
+        }
+        Ok(())
+    }
+
+    fn created(&self, ev: Created, _slf: &Rc<Self>) -> Result<(), Self::Error> {
+        if let Some(owner) = self.owner.get() {
+            owner.created(&ev.fd);
+        }
+        Ok(())
+    }
+
+    fn failed(&self, ev: Failed<'_>, _slf: &Rc<Self>) -> Result<(), Self::Error> {
+        if let Some(owner) = self.owner.get() {
+            owner.failed(ev.reason);
+        }
+        Ok(())
+    }
+}
+
+usr_object_base! {
+    self = UsrJayEiSession = JayEiSession;
+    version = self.version;
+}
+
+impl UsrObject for UsrJayEiSession {
+    fn destroy(&self) {
+        self.con.request(Release { self_id: self.id });
+    }
+
+    fn break_loops(&self) {
+        self.owner.take();
+    }
+}