chore: Minor code style improvements to Wayland code

With `wayland-backend/client_system` enabled, this was causing an
infinite loop since `read` never returned `WouldBlock`.

This seems to be an inconsistency in wayland-rs:
https://github.com/Smithay/wayland-rs/pull/959

In any case, it isn't necessary to call `read` more than once.

.github/workflows/release.yml

@@ -105,7 +105,7 @@ jobs:
         # see https://github.com/wingtk/gvsbuild/pull/1004
         Move-Item "C:\Program Files\Git\usr\bin" "C:\Program Files\Git\usr\notbin"
         Move-Item "C:\Program Files\Git\bin" "C:\Program Files\Git\notbin"
-        gvsbuild build --msys-dir=C:\msys64 gtk4 libadwaita librsvg
+        gvsbuild build --vs-ver=vs2026 --msys-dir=C:\msys64 gtk4 libadwaita librsvg
         Move-Item "C:\Program Files\Git\usr\notbin" "C:\Program Files\Git\usr\bin"
         Move-Item "C:\Program Files\Git\notbin" "C:\Program Files\Git\bin"
     - uses: actions/checkout@v6

.github/workflows/rust.yml

@@ -40,7 +40,6 @@ jobs:
           - test
     steps:
       - uses: actions/checkout@v6
-      - uses: Swatinem/rust-cache@v2
       - name: Install Linux deps
         if: runner.os == 'Linux'
         run: |
@@ -49,6 +48,13 @@ jobs:
       - name: Install macOS dependencies
         if: runner.os == 'macOS'
         run: brew install gtk4 libadwaita imagemagick
+      - name: Record macOS native lib versions for cache key
+        if: runner.os == 'macOS'
+        run: |
+          echo "MACOS_LIB_VER=$(brew list --versions glib gtk4 libadwaita | tr '\n' '_')" >> "$GITHUB_ENV"
+      - uses: Swatinem/rust-cache@v2
+        with:
+          prefix-key: ${{ env.MACOS_LIB_VER }}
       - name: Install Windows Dependencies - create gtk dir
         if: runner.os == 'Windows'
         run: mkdir C:\gtk-build\gtk\x64\release
@@ -77,7 +83,7 @@ jobs:
           py -m venv .venv
           .venv\Scripts\activate.ps1
           py -m pip install gvsbuild
-          gvsbuild build --msys-dir=C:\msys64 gtk4 libadwaita librsvg
+          gvsbuild build --vs-ver=vs2026 --msys-dir=C:\msys64 gtk4 libadwaita librsvg
       - name: cargo build
         if: matrix.job == 'build'
         run: cargo build

input-capture/src/layer_shell.rs

@@ -123,7 +123,6 @@ struct State {
     focused: Option<Arc<Window>>,
     global_list: GlobalList,
     globals: Globals,
-    wayland_fd: RawFd,
     read_guard: Option<ReadEventsGuard>,
     qh: QueueHandle<Self>,
     pending_events: VecDeque<(Position, CaptureEvent)>,
@@ -138,7 +137,7 @@ struct Inner {
 
 impl AsRawFd for Inner {
     fn as_raw_fd(&self) -> RawFd {
-        self.state.wayland_fd
+        self.queue.as_fd().as_raw_fd()
     }
 }
 
@@ -332,7 +331,6 @@ impl LayerShellInputCapture {
             active_windows: Vec::new(),
             focused: None,
             qh,
-            wayland_fd: queue.as_fd().as_raw_fd(),
             read_guard: None,
             pending_events: VecDeque::new(),
             outputs: vec![],
@@ -548,13 +546,12 @@ impl State {
 }
 
 impl Inner {
-    fn read(&mut self) -> bool {
+    fn read(&mut self) {
         match self.state.read_guard.take().unwrap().read() {
-            Ok(_) => true,
-            Err(WaylandError::Io(e)) if e.kind() == ErrorKind::WouldBlock => false,
+            Ok(_) => {}
+            Err(WaylandError::Io(e)) if e.kind() == ErrorKind::WouldBlock => {}
             Err(WaylandError::Io(e)) => {
                 log::error!("error reading from wayland socket: {e}");
-                false
             }
             Err(WaylandError::Protocol(e)) => {
                 panic!("wayland protocol violation: {e}")
@@ -564,16 +561,11 @@ impl Inner {
 
     fn prepare_read(&mut self) -> io::Result<()> {
         loop {
-            match self.queue.prepare_read() {
-                None => match self.queue.dispatch_pending(&mut self.state) {
-                    Ok(_) => continue,
-                    Err(DispatchError::Backend(WaylandError::Io(e))) => return Err(e),
-                    Err(e) => panic!("failed to dispatch wayland events: {e}"),
-                },
-                Some(r) => {
-                    self.state.read_guard = Some(r);
-                    break Ok(());
-                }
+            if let Some(guard) = self.queue.prepare_read() {
+                self.state.read_guard = Some(guard);
+                break Ok(());
+            } else {
+                self.dispatch_events();
             }
         }
     }
@@ -655,13 +647,7 @@ impl Stream for LayerShellInputCapture {
                 let inner = guard.get_inner_mut();
 
                 // read events
-                while inner.read() {
-                    // prepare next read
-                    match inner.prepare_read() {
-                        Ok(_) => {}
-                        Err(e) => return Poll::Ready(Some(Err(e.into()))),
-                    }
-                }
+                inner.read();
 
                 // dispatch the events
                 inner.dispatch_events();

src/config.rs

@@ -518,7 +518,7 @@ impl Config {
     }
 
     pub fn read_from_disk(&mut self) -> Result<bool, io::Error> {
-        log::info!("reading config from {:?}", &self.config_path);
+        log::info!("reading config from {:?}", self.config_path);
 
         let current_config = fs::read_to_string(&self.config_path)?;
         let current_config = match current_config.parse::<DocumentMut>() {
@@ -548,7 +548,7 @@ impl Config {
     }
 
     pub fn write_back(&mut self) -> Result<(), io::Error> {
-        log::info!("writing config to {:?}", &self.config_path);
+        log::info!("writing config to {:?}", self.config_path);
         /* the new config */
         let new_config = self.config_toml.clone().unwrap_or_default();
         let new_config = toml_edit::ser::to_string_pretty(&new_config).expect("config");