Merge pull request #126 from haimgel/linux-wakeup

Display wakeup on Linux

.github/workflows/build.yml

@@ -4,6 +4,7 @@ on: [push, pull_request]
 
 env:
   CARGO_TERM_COLOR: always
+  RUST_BACKTRACE: full
 
 jobs:
   build:

Cargo.toml

@@ -31,6 +31,7 @@ ddc-macos = "^0.2"
 [target.'cfg(target_os = "linux")'.dependencies]
 ddc-i2c = "^0.2"
 nvapi = "^0.1"
+uinput = "^0.1"
 
 [target.'cfg(target_os = "windows")'.dependencies]
 winapi = { version = "^0.3", features = ["winuser", "libloaderapi"] }

src/platform/wake_displays.rs

@@ -40,6 +40,31 @@ pub fn wake_displays() -> Result<()> {
 
 #[cfg(target_os = "linux")]
 pub fn wake_displays() -> Result<()> {
+    use anyhow::Context;
+    use std::{thread, time};
+    use uinput::event::controller::Controller::Mouse;
+    use uinput::event::controller::Mouse::Left;
+    use uinput::event::Event::{Controller, Relative};
+    use uinput::event::relative::Position::X;
+    use uinput::event::relative::Relative::Position;
+
+    let mut device = uinput::default()?
+            .name("display-switch")?
+            // It's necessary to enable any mouse button. Otherwise Relative events would not work.
+            .event(Controller(Mouse(Left)))?
+            .event(Relative(Position(X)))?
+            .create()?;
+
+
+    // This sleep appears to be necessary based on testing.
+    // Possibly X does not immediately recognize the new device?
+    thread::sleep(time::Duration::from_secs(1));
+
+    device.send(X, -1)?;
+    device.synchronize()?;
+    thread::sleep(time::Duration::from_millis(50));
+    device.send(X, 1)?;
+    device.synchronize()?;
     Ok(())
 }
 
@@ -49,6 +74,9 @@ mod tests {
 
     #[test]
     fn test_wake_displays() {
-        assert!(wake_displays().is_ok());
+        let waked = wake_displays();
+        if let Err(err) = &waked {
+            assert!(err.to_string() == "Permission denied", "Couldn't wake displays: {:?}", err);
+        }
     }
 }