Add a transition macro system

src/api_transition.rs

@@ -0,0 +1,64 @@
+
+//! This temporary module generates types that wrap around the old API (winit v5 and below) and
+//! expose the new API (winit v6 and above).
+//!
+//! This is temporary so that existing backends can smoothly transition. After all implementations
+//! have finished transitionning, this module should disappear.
+
+macro_rules! gen_api_transition {
+    () => {
+        pub struct EventsLoop {
+            windows: ::std::sync::Mutex<Vec<::std::sync::Arc<Window>>>,
+        }
+
+        impl EventsLoop {
+            pub fn new() -> EventsLoop {
+                EventsLoop {
+                    windows: ::std::sync::Mutex::new(vec![]),
+                }
+            }
+
+            pub fn poll_events<F>(&self, mut callback: F)
+                where F: FnMut(::Event)
+            {
+                unimplemented!()
+            }
+
+            pub fn run_forever<F>(&self, mut callback: F)
+                where F: FnMut(::Event)
+            {
+                unimplemented!()
+            }
+        }
+
+        pub struct Window2 {
+            window: ::std::sync::Arc<Window>,
+        }
+
+        impl ::std::ops::Deref for Window2 {
+            type Target = Window;
+            #[inline]
+            fn deref(&self) -> &Window {
+                &*self.window
+            }
+        }
+
+        impl Window2 {
+            pub fn new(events_loop: ::std::sync::Arc<EventsLoop>, window: &::WindowAttributes,
+                       pl_attribs: &PlatformSpecificWindowBuilderAttributes)
+                       -> Result<Window2, CreationError>
+            {
+                let win = ::std::sync::Arc::new(try!(Window::new(window, pl_attribs)));
+                events_loop.windows.lock().unwrap().push(win.clone());
+                Ok(Window2 {
+                    window: win,
+                })
+            }
+
+            #[inline]
+            pub fn id(&self) -> usize {
+                &*self.window as *const Window as usize
+            }
+        }
+    };
+}