wayland: allow binding to removed outputs

src/ifs/wl_output.rs

@@ -1,3 +1,5 @@
+mod removed_output;
+
 use {
     crate::{
         backend,
@@ -229,13 +231,15 @@ impl WlOutputGlobal {
 
 global_base!(WlOutputGlobal, WlOutput, WlOutputError);
 
+const OUTPUT_VERSION: u32 = 4;
+
 impl Global for WlOutputGlobal {
     fn singleton(&self) -> bool {
         false
     }
 
     fn version(&self) -> u32 {
-        4
+        OUTPUT_VERSION
     }
 
     fn break_loops(&self) {

src/ifs/wl_output/removed_output.rs

@@ -0,0 +1,63 @@
+use {
+    crate::{
+        client::{Client, ClientError},
+        globals::{Global, GlobalName, RemovableWaylandGlobal},
+        ifs::wl_output::{WlOutput, WlOutputGlobal, OUTPUT_VERSION},
+        object::Version,
+        wire::WlOutputId,
+    },
+    std::rc::Rc,
+    thiserror::Error,
+};
+
+struct RemovedOutputGlobal {
+    name: GlobalName,
+}
+
+impl RemovedOutputGlobal {
+    fn bind_(
+        self: Rc<Self>,
+        id: WlOutputId,
+        client: &Rc<Client>,
+        version: Version,
+    ) -> Result<(), RemovedOutputError> {
+        let obj = Rc::new(WlOutput {
+            global: Default::default(),
+            id,
+            xdg_outputs: Default::default(),
+            client: client.clone(),
+            version,
+            tracker: Default::default(),
+        });
+        track!(client, obj);
+        client.add_client_obj(&obj)?;
+        Ok(())
+    }
+}
+
+global_base!(RemovedOutputGlobal, WlOutput, RemovedOutputError);
+
+impl Global for RemovedOutputGlobal {
+    fn singleton(&self) -> bool {
+        false
+    }
+
+    fn version(&self) -> u32 {
+        OUTPUT_VERSION
+    }
+}
+
+simple_add_global!(RemovedOutputGlobal);
+
+impl RemovableWaylandGlobal for WlOutputGlobal {
+    fn create_replacement(&self) -> Rc<dyn Global> {
+        Rc::new(RemovedOutputGlobal { name: self.name })
+    }
+}
+
+#[derive(Debug, Error)]
+enum RemovedOutputError {
+    #[error(transparent)]
+    ClientError(Box<ClientError>),
+}
+efrom!(RemovedOutputError, ClientError);