wl_usr: add additional interfaces

src/wl_usr/usr_ifs/usr_wl_data_offer.rs

@@ -0,0 +1,58 @@
+use {
+    crate::{
+        object::Version,
+        wire::{WlDataOfferId, wl_data_offer::*},
+        wl_usr::{UsrCon, usr_object::UsrObject},
+    },
+    ahash::AHashSet,
+    std::{cell::RefCell, convert::Infallible, rc::Rc},
+    uapi::OwnedFd,
+};
+
+pub struct UsrWlDataOffer {
+    pub id: WlDataOfferId,
+    pub con: Rc<UsrCon>,
+    pub version: Version,
+    pub mime_types: RefCell<AHashSet<String>>,
+}
+
+impl UsrWlDataOffer {
+    #[expect(dead_code)]
+    pub fn receive(&self, mime_type: &str, fd: &Rc<OwnedFd>) {
+        self.con.request(Receive {
+            self_id: self.id,
+            mime_type,
+            fd: fd.clone(),
+        });
+    }
+}
+
+impl WlDataOfferEventHandler for UsrWlDataOffer {
+    type Error = Infallible;
+
+    fn offer(&self, ev: Offer<'_>, _slf: &Rc<Self>) -> Result<(), Self::Error> {
+        self.mime_types
+            .borrow_mut()
+            .insert(ev.mime_type.to_string());
+        Ok(())
+    }
+
+    fn source_actions(&self, _ev: SourceActions, _slf: &Rc<Self>) -> Result<(), Self::Error> {
+        Ok(())
+    }
+
+    fn action(&self, _ev: Action, _slf: &Rc<Self>) -> Result<(), Self::Error> {
+        Ok(())
+    }
+}
+
+usr_object_base! {
+    self = UsrWlDataOffer = WlDataOffer;
+    version = self.version;
+}
+
+impl UsrObject for UsrWlDataOffer {
+    fn destroy(&self) {
+        self.con.request(Destroy { self_id: self.id });
+    }
+}