Use CGPostKeyboardEvent instead of CGEventPost

For certain events (e.g. arrow keys) the modifier mask that is set on the event (which includes the function key) does not seem to get cleared on key up, which ruins all future events because their mask contains those flags even though they shouldn't be active anymore. The deprecated function doesn't seem to do this so use it for now until I can figure out what is going on. Fixes #11. (Or, at least, makes it significantly less annoying.)
saagarjha · Feb 8, 2024 · 0e8de40 · 0e8de40
1 parent f54aefc
commit 0e8de40
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/macOS/Events.swift b/macOS/Events.swift
@@ -65,7 +65,15 @@ actor EventDispatcher {
 	}
 
 	func injectKey(key: Key, down: Bool) {
-		let event = CGEvent(keyboardEventSource: nil, virtualKey: CGKeyCode(key.macOSCode), keyDown: down)!
-		event.post(tap: .cghidEventTap)
+		// FB13590408
+		if let CGPostKeyboardEvent {
+			_ = CGPostKeyboardEvent(0, CGKeyCode(key.macOSCode), down ? 1 : 0)
+		} else {
+			let event = CGEvent(keyboardEventSource: .init(stateID: .hidSystemState), virtualKey: CGKeyCode(key.macOSCode), keyDown: down)!
+			event.post(tap: .cghidEventTap)
+		}
 	}
 }
+
+// This is marked as deprecated and unavailable in Swift. Rude.
+let CGPostKeyboardEvent = unsafeBitCast(dlsym(dlopen(nil, RTLD_LAZY), "CGPostKeyboardEvent"), to: (@convention(c) (CGCharCode, CGKeyCode, boolean_t) -> CGError)?.self)