fix macos

src/emulate/error.rs

@@ -18,6 +18,8 @@ pub enum EmulationCreationError {
     Xdp(#[from] XdpEmulationCreationError),
     #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
     X11(#[from] X11EmulationCreationError),
+    #[cfg(target_os = "macos")]
+    MacOs(#[from] MacOSEmulationCreationError),
     NoAvailableBackend,
 }
 
@@ -32,6 +34,8 @@ impl Display for EmulationCreationError {
             EmulationCreationError::Xdp(e) => format!("desktop portal backend: {e}"),
             #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
             EmulationCreationError::X11(e) => format!("x11 backend: {e}"),
+            #[cfg(target_os = "macos")]
+            EmulationCreationError::MacOs(e) => format!("macos backend: {e}"),
             EmulationCreationError::NoAvailableBackend => format!("no backend available"),
         };
         write!(f, "could not create input emulation backend: {reason}")
@@ -137,3 +141,18 @@ impl Display for X11EmulationCreationError {
         }
     }
 }
+
+#[cfg(target_os = "macos")]
+#[derive(Debug, Error)]
+pub enum MacOSEmulationCreationError {
+    EventSourceCreation,
+}
+
+#[cfg(target_os = "macos")]
+impl Display for MacOSEmulationCreationError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            MacOSEmulationCreationError::EventSourceCreation => write!(f, "could not create event source"),
+        }
+    }
+}

src/emulate/macos.rs

@@ -1,7 +1,6 @@
 use crate::client::{ClientEvent, ClientHandle};
 use crate::emulate::InputEmulation;
 use crate::event::{Event, KeyboardEvent, PointerEvent};
-use anyhow::{anyhow, Result};
 use async_trait::async_trait;
 use core_graphics::display::{CGDisplayBounds, CGMainDisplayID, CGPoint};
 use core_graphics::event::{
@@ -13,6 +12,8 @@ use std::ops::{Index, IndexMut};
 use std::time::Duration;
 use tokio::task::AbortHandle;
 
+use super::error::MacOSEmulationCreationError;
+
 const DEFAULT_REPEAT_DELAY: Duration = Duration::from_millis(500);
 const DEFAULT_REPEAT_INTERVAL: Duration = Duration::from_millis(32);
 
@@ -53,11 +54,9 @@ impl IndexMut<CGMouseButton> for ButtonState {
 unsafe impl Send for MacOSEmulation {}
 
 impl MacOSEmulation {
-    pub fn new() -> Result<Self> {
-        let event_source = match CGEventSource::new(CGEventSourceStateID::CombinedSessionState) {
-            Ok(e) => e,
-            Err(_) => return Err(anyhow!("event source creation failed!")),
-        };
+    pub fn new() -> Result<Self, MacOSEmulationCreationError> {
+        let event_source = CGEventSource::new(CGEventSourceStateID::CombinedSessionState)
+            .map_err(|_| MacOSEmulationCreationError::EventSourceCreation)?;
         let button_state = ButtonState {
             left: false,
             right: false,