add wayland target and rename gnome target

It should be possible to build both Wayland (sans D-Bus) and GNOME
versions simultaneously. Add a Wayland target, and, for consistency,
rename the GNOME target.

src/main.rs

@@ -1,99 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-only
-/*
- * Copyright (c) 2024, Richard Acayan. All rights reserved.
- */
-
-mod core;
-mod dbus;
-mod wayland;
-
-use crate::core::Layout;
-use crate::dbus::session;
-use crate::dbus::osk::OSK0;
-use crate::wayland::Dispatcher;
-use polling::Event;
-use polling::Events;
-use polling::Poller;
-use std::future::pending;
-use std::path::Path;
-use std::sync::Arc;
-use std::time::Instant;
-use tokio::task;
-use wayland_client::globals;
-use zbus::InterfaceRef;
-
-pub struct VisibilityManager(InterfaceRef<OSK0<Dispatcher>>);
-
-impl VisibilityManager {
-    pub fn set_visible(&self, visible: bool)
-    {
-        let osk = self.0.clone();
-
-        task::spawn(async move {
-            let osk = osk.get().await;
-            osk.set_visible(visible).await;
-        });
-    }
-}
-
-#[tokio::main(flavor = "current_thread")]
-async fn main()
-{
-    let conn_wl = wayland_client::Connection::connect_to_env().unwrap();
-
-    let (globals, mut queue) = globals::registry_queue_init::<Dispatcher>(&conn_wl)
-                                            .expect("Registry required");
-
-    let layouts = Path::new("/usr/share/unfettered-keyboard/layouts");
-    let layout = Layout::load(layouts, "latn_qwerty_us.xml")
-                             .expect("Layout should be loadable");
-    let mut dispatcher = Dispatcher::new(layout, queue.handle(), &globals).unwrap();
-
-    let wl_evt = Event::readable(0);
-
-    let conn_zbus = zbus::Connection::session().await.unwrap();
-
-    let res = session::register(&conn_zbus).await;
-    if let Err(e) = res {
-        eprintln!("warn: GNOME session registration failed: {}", e);
-    }
-
-    let conn_wl = Arc::new(conn_wl);
-
-    let gfx = dispatcher.graphics();
-    let osk = OSK0::start(&conn_zbus, gfx, conn_wl.clone()).await;
-    match osk {
-        Ok(k) => dispatcher.set_osk(VisibilityManager(k)),
-        Err(e) => eprintln!("warn: bind to sm.puri.OSK0 failed: {}", e),
-    }
-
-    let mut events = Events::new();
-    let poller = Poller::new().unwrap();
-
-    task::spawn_blocking(move || {
-        loop {
-            conn_wl.flush().unwrap();
-
-            let guard = queue.prepare_read().unwrap();
-            let fd = guard.connection_fd();
-            let timer = dispatcher.button().next_time().map(|t| t - Instant::now());
-
-            unsafe {
-                poller.add(&fd, wl_evt).unwrap();
-            }
-
-            events.clear();
-            poller.wait(&mut events, timer).unwrap();
-            poller.delete(fd).unwrap();
-
-            if !events.is_empty() {
-                guard.read().unwrap();
-                queue.dispatch_pending(&mut dispatcher).unwrap();
-            }
-
-            dispatcher.dispatch_timers();
-        }
-    });
-
-    pending::<()>().await;
-}