2 files changed, 40 insertions, 0 deletions
diff --git a/native/src/window.rs b/native/src/window.rs
index 4bccc471..6ebe15b1 100644
--- a/native/src/window.rs
+++ b/native/src/window.rs
@@ -2,11 +2,13 @@
 mod action;
 mod event;
 mod mode;
+mod redraw_request;
 mod user_attention;
 
 pub use action::Action;
 pub use event::Event;
 pub use mode::Mode;
+pub use redraw_request::RedrawRequest;
 pub use user_attention::UserAttention;
 
 use crate::subscription::{self, Subscription};
diff --git a/native/src/window/redraw_request.rs b/native/src/window/redraw_request.rs
new file mode 100644
index 00000000..1377823a
--- /dev/null
+++ b/native/src/window/redraw_request.rs
@@ -0,0 +1,38 @@
+use std::time::Instant;
+
+/// A request to redraw a window.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+pub enum RedrawRequest {
+    /// Redraw the next frame.
+    NextFrame,
+
+    /// Redraw at the given time.
+    At(Instant),
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::time::{Duration, Instant};
+
+    #[test]
+    fn ordering() {
+        let now = Instant::now();
+        let later = now + Duration::from_millis(10);
+
+        assert_eq!(RedrawRequest::NextFrame, RedrawRequest::NextFrame);
+        assert_eq!(RedrawRequest::At(now), RedrawRequest::At(now));
+
+        assert!(RedrawRequest::NextFrame < RedrawRequest::At(now));
+        assert!(RedrawRequest::At(now) > RedrawRequest::NextFrame);
+        assert!(RedrawRequest::At(now) < RedrawRequest::At(later));
+        assert!(RedrawRequest::At(later) > RedrawRequest::At(now));
+
+        assert!(RedrawRequest::NextFrame <= RedrawRequest::NextFrame);
+        assert!(RedrawRequest::NextFrame <= RedrawRequest::At(now));
+        assert!(RedrawRequest::At(now) >= RedrawRequest::NextFrame);
+        assert!(RedrawRequest::At(now) <= RedrawRequest::At(now));
+        assert!(RedrawRequest::At(now) <= RedrawRequest::At(later));
+        assert!(RedrawRequest::At(later) >= RedrawRequest::At(now));
+    }
+}