Async (#30)

- manual eventloop now replaced by asycn-await using the tokio runtime
- dns no longer blocks the event loop
- simplifies logic
- makes xdg-desktop-portal easier to integrate

src/backend/producer/x11.rs

@@ -1,12 +1,13 @@
+use std::io::Result;
+use std::os::fd::{AsRawFd, self};
 use std::vec::Drain;
 
-use mio::{Token, Registry};
-use mio::event::Source;
-use std::io::Result;
+use tokio::io::unix::AsyncFd;
 
+use crate::event::Event;
 use crate::producer::EventProducer;
 
-use crate::{client::{ClientHandle, ClientEvent}, event::Event};
+use crate::client::{ClientEvent, ClientHandle};
 
 pub struct X11Producer {
     pending_events: Vec<(ClientHandle, Event)>,
@@ -20,27 +21,9 @@ impl X11Producer {
     }
 }
 
-impl Source for X11Producer {
-    fn register(
-        &mut self,
-        _registry: &Registry,
-        _token: Token,
-        _interests: mio::Interest,
-    ) -> Result<()> {
-        Ok(())
-    }
-
-    fn reregister(
-        &mut self,
-        _registry: &Registry,
-        _token: Token,
-        _interests: mio::Interest,
-    ) -> Result<()> {
-        Ok(())
-    }
-
-    fn deregister(&mut self, _registry: &Registry) -> Result<()> {
-        Ok(())
+impl AsRawFd for X11Producer {
+    fn as_raw_fd(&self) -> fd::RawFd {
+        todo!()
     }
 }
 
@@ -52,4 +35,8 @@ impl EventProducer for X11Producer {
     }
 
     fn release(&mut self) {}
+
+    fn get_async_fd(&self) -> Result<AsyncFd<fd::RawFd>> {
+        todo!()
+    }
 }