linux: Remove dead code from wayland & fix some trivial warnings.

src/platform/linux/mod.rs

@@ -5,9 +5,7 @@ use std::sync::Arc;
 
 use CreationError;
 use CursorState;
-use WindowEvent as Event;
 use MouseCursor;
-use WindowAttributes;
 use libc;
 
 use self::x11::XConnection;

src/platform/linux/wayland/context.rs

@@ -94,7 +94,9 @@ impl WaylandEnv {
     fn get_seat(&self) -> Option<wl_seat::WlSeat> {
         for &(name, ref interface, version) in self.inner.globals() {
             if interface == "wl_seat" {
-                // this "expect" cannot trigger (see https://github.com/vberger/wayland-client-rs/issues/69)
+                if version < 5 {
+                    panic!("Winit requires at least version 5 of the wl_seat global.");
+                }
                 let seat = self.registry.bind::<wl_seat::WlSeat>(5, name).expect("Seat cannot be destroyed");
                 return Some(seat)
             }
@@ -209,7 +211,7 @@ impl WaylandContext {
         // this handles both "no libwayland" and "no compositor" cases
         let (display, mut event_queue) = match default_connect() {
             Ok(ret) => ret,
-            Err(e) => return None
+            Err(_) => return None
         };
 
         // this "expect" cannot trigger (see https://github.com/vberger/wayland-client-rs/issues/69)
@@ -237,7 +239,7 @@ impl WaylandContext {
     }
 
     pub fn flush(&self) {
-        self.display.flush();
+        let _ = self.display.flush();
     }
 
     pub fn with_output<F>(&self, id: MonitorId, f: F) where F: FnOnce(&wl_output::WlOutput) {
@@ -512,7 +514,7 @@ impl wl_pointer::Handler for WaylandEnv {
     fn axis_source(&mut self,
                    _evqh: &mut EventQueueHandle,
                    _proxy: &wl_pointer::WlPointer,
-                   axis_source: wl_pointer::AxisSource)
+                   _axis_source: wl_pointer::AxisSource)
     {
     }
 
@@ -520,7 +522,7 @@ impl wl_pointer::Handler for WaylandEnv {
                  _evqh: &mut EventQueueHandle,
                  _proxy: &wl_pointer::WlPointer,
                  _time: u32,
-                 axis: wl_pointer::Axis)
+                 _axis: wl_pointer::Axis)
     {
         self.axis_state = TouchPhase::Ended;
     }

src/platform/linux/wayland/mod.rs

@@ -1,13 +1,12 @@
 #![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
 
-pub use self::window::{PollEventsIterator, WaitEventsIterator, Window, WindowProxy};
+use self::window::Window;
 pub use self::context::{WaylandContext, MonitorId, get_available_monitors,
                         get_primary_monitor};
 
 extern crate wayland_kbd;
 extern crate wayland_window;
 
-use platform::PlatformSpecificWindowBuilderAttributes;
 use CreationError;
 
 use std::sync::Arc;
@@ -43,7 +42,7 @@ impl EventsLoop {
     pub fn poll_events<F>(&self, mut callback: F)
         where F: FnMut(::Event)
     {
-        let mut windows = self.windows.lock().unwrap();
+        let windows = self.windows.lock().unwrap();
         for window in windows.iter() {
             for event in window.poll_events() {
                 callback(::Event::WindowEvent {
@@ -62,7 +61,7 @@ impl EventsLoop {
         // Yeah that's a very bad implementation.
         loop {
             self.poll_events(|e| callback(e));
-            ::std::thread::sleep_ms(5);
+            ::std::thread::sleep(::std::time::Duration::from_millis(5));
             if self.interrupted.load(::std::sync::atomic::Ordering::Relaxed) {
                 break;
             }

src/platform/linux/wayland/window.rs

@@ -11,21 +11,6 @@ use super::WaylandContext;
 use super::wayland_window;
 use super::wayland_window::DecoratedSurface;
 
-#[derive(Clone)]
-pub struct WindowProxy {
-    ctxt: Arc<WaylandContext>,
-    eviter: Arc<Mutex<VecDeque<Event>>>,
-}
-
-impl WindowProxy {
-    #[inline]
-    pub fn wakeup_event_loop(&self) {
-        // Send a sync event, so that any waiting "dispatch" will return
-        self.ctxt.display.sync();
-        self.eviter.lock().unwrap().push_back(Event::Awakened);
-    }
-}
-
 pub struct Window {
     ctxt: Arc<WaylandContext>,
     evq: Mutex<EventQueue>,
@@ -48,18 +33,6 @@ impl<'a> Iterator for PollEventsIterator<'a> {
     }
 }
 
-pub struct WaitEventsIterator<'a> {
-    window: &'a Window,
-}
-
-impl<'a> Iterator for WaitEventsIterator<'a> {
-    type Item = Event;
-
-    fn next(&mut self) -> Option<Event> {
-        self.window.next_event(true)
-    }
-}
-
 impl Window {
     pub fn new(ctxt: Arc<WaylandContext>, attributes: &WindowAttributes)  -> Result<Window, CreationError>
     {
@@ -107,24 +80,12 @@ impl Window {
     }
 
     fn process_resize(&self) {
-        use std::cmp::max;
         let mut evq_guard = self.evq.lock().unwrap();
         let mut state = evq_guard.state();
-        let newsize = {
         let decorated = state.get_mut_handler::<DecoratedSurface<DecoratedHandler>>(self.decorated_id);
-            let newsize = decorated.handler().as_mut().and_then(|h| h.take_newsize());
+        if let Some((w, h)) = decorated.handler().as_mut().and_then(|h| h.take_newsize()) {
-            if let Some((w, h)) = newsize {
             decorated.resize(w as i32, h as i32);
             *self.size.lock().unwrap() = (w, h);
-            }
-            newsize
-        };
-        // callback_resize if any
-        if let Some((w, h)) = newsize {
-            let mut handler = state.get_mut_handler::<WindowHandler>(self.handler_id);
-            if let Some(ref callback) = handler.resize_callback {
-                callback(w, h);
-            }
             self.eviter.lock().unwrap().push_back(Event::Resized(w,h));
         }
     }
@@ -143,18 +104,19 @@ impl Window {
 
         // read some events if some are waiting & queue is empty
         if let Some(guard) = self.evq.lock().unwrap().prepare_read() {
-            guard.read_events();
+            guard.read_events().expect("Wayland connection unexpectedly lost");
         }
 
         // try a pending dispatch
         {
             self.ctxt.dispatch_pending();
-            self.evq.lock().unwrap().dispatch_pending();
+            self.evq.lock().unwrap().dispatch_pending()
+                                    .expect("Wayland connection unexpectedly lost");
             // some events were dispatched, need to process a potential resising
             self.process_resize();
         }
 
-        let mut evt = {
+        evt = {
             let mut guard = self.eviter.lock().unwrap();
             guard.pop_front()
         };
@@ -164,7 +126,8 @@ impl Window {
             {
                 self.ctxt.flush();
                 self.ctxt.dispatch();
-                self.evq.lock().unwrap().dispatch_pending();
+                self.evq.lock().unwrap().dispatch_pending()
+                                        .expect("Wayland connection unexpectedly lost");
                 // some events were dispatched, need to process a potential resising
                 self.process_resize();
             }
@@ -178,7 +141,7 @@ impl Window {
     pub fn set_title(&self, title: &str) {
         let mut guard = self.evq.lock().unwrap();
         let mut state = guard.state();
-        let mut decorated = state.get_mut_handler::<DecoratedSurface<DecoratedHandler>>(self.decorated_id);
+        let decorated = state.get_mut_handler::<DecoratedSurface<DecoratedHandler>>(self.decorated_id);
         decorated.set_title(title.into())
     }
 
@@ -223,14 +186,6 @@ impl Window {
         decorated.resize(x as i32, y as i32);
     }
 
-    #[inline]
-    pub fn create_window_proxy(&self) -> WindowProxy {
-        WindowProxy {
-            ctxt: self.ctxt.clone(),
-            eviter: self.eviter.clone()
-        }
-    }
-
     #[inline]
     pub fn poll_events(&self) -> PollEventsIterator {
         PollEventsIterator {
@@ -238,21 +193,6 @@ impl Window {
         }
     }
 
-    #[inline]
-    pub fn wait_events(&self) -> WaitEventsIterator {
-        WaitEventsIterator {
-            window: self
-        }
-    }
-
-    #[inline]
-    pub fn set_window_resize_callback(&mut self, callback: Option<fn(u32, u32)>) {
-        let mut guard = self.evq.lock().unwrap();
-        let mut state = guard.state();
-        let mut handler = state.get_mut_handler::<WindowHandler>(self.handler_id);
-        handler.resize_callback = callback;
-    }
-
     #[inline]
     pub fn set_cursor(&self, _cursor: MouseCursor) {
         // TODO
@@ -321,20 +261,18 @@ impl wayland_window::Handler for DecoratedHandler {
 
 struct WindowHandler {
     my_id: usize,
-    resize_callback: Option<fn(u32,u32)>,
 }
 
 impl WindowHandler {
     fn new() -> WindowHandler {
         WindowHandler {
             my_id: 0,
-            resize_callback: None
         }
     }
 }
 
 impl Init for WindowHandler {
-    fn init(&mut self, evqh: &mut EventQueueHandle, index: usize) {
+    fn init(&mut self, _evqh: &mut EventQueueHandle, index: usize) {
         self.my_id = index;
     }
 }

src/platform/linux/x11/mod.rs

@@ -44,7 +44,7 @@ impl EventsLoop {
     pub fn poll_events<F>(&self, mut callback: F)
         where F: FnMut(::Event)
     {
-        let mut windows = self.windows.lock().unwrap();
+        let windows = self.windows.lock().unwrap();
         for window in windows.iter() {
             for event in window.poll_events() {
                 callback(::Event::WindowEvent {
@@ -63,7 +63,7 @@ impl EventsLoop {
         // Yeah that's a very bad implementation.
         loop {
             self.poll_events(|e| callback(e));
-            ::std::thread::sleep_ms(5);
+            ::std::thread::sleep(::std::time::Duration::from_millis(5));
             if self.interrupted.load(::std::sync::atomic::Ordering::Relaxed) {
                 break;
             }

src/platform/linux/x11/window.rs

@@ -793,7 +793,7 @@ impl Window {
             // differs on the desktop environments or themes.
             //
             // Try the better looking (or more suiting) names first.
-            let mut xcursor = match cursor {
+            let xcursor = match cursor {
                 MouseCursor::Alias => load("link"),
                 MouseCursor::Arrow => load("arrow"),
                 MouseCursor::Cell => load("plus"),

src/platform/linux/x11/xdisplay.rs

@@ -1,7 +1,6 @@
 use std::ptr;
 use std::fmt;
 use std::error::Error;
-use std::ffi::CString;
 use std::sync::Mutex;
 
 use libc;