⚡ Optimize hotkey service

internal/common/hotkey/darwin/hotkey.m

@@ -0,0 +1,59 @@
+//go:build darwin
+
+#include <stdint.h>
+#import <Cocoa/Cocoa.h>
+#import <Carbon/Carbon.h>
+extern void keydownCallback(uintptr_t handle);
+extern void keyupCallback(uintptr_t handle);
+
+static OSStatus
+keydownHandler(EventHandlerCallRef nextHandler, EventRef theEvent, void *userData) {
+	EventHotKeyID k;
+	GetEventParameter(theEvent, kEventParamDirectObject, typeEventHotKeyID, NULL, sizeof(k), NULL, &k);
+	keydownCallback((uintptr_t)k.id); // use id as handle
+	return noErr;
+}
+
+static OSStatus
+keyupHandler(EventHandlerCallRef nextHandler, EventRef theEvent, void *userData) {
+	EventHotKeyID k;
+	GetEventParameter(theEvent, kEventParamDirectObject, typeEventHotKeyID, NULL, sizeof(k), NULL, &k);
+	keyupCallback((uintptr_t)k.id); // use id as handle
+	return noErr;
+}
+
+// registerHotkeyWithCallback registers a global system hotkey for callbacks.
+int registerHotKey(int mod, int key, uintptr_t handle, EventHotKeyRef* ref) {
+	__block OSStatus s;
+	dispatch_sync(dispatch_get_main_queue(), ^{
+		EventTypeSpec keydownEvent;
+		keydownEvent.eventClass = kEventClassKeyboard;
+		keydownEvent.eventKind = kEventHotKeyPressed;
+		EventTypeSpec keyupEvent;
+		keyupEvent.eventClass = kEventClassKeyboard;
+		keyupEvent.eventKind = kEventHotKeyReleased;
+		InstallApplicationEventHandler(
+			&keydownHandler, 1, &keydownEvent, NULL, NULL
+		);
+		InstallApplicationEventHandler(
+			&keyupHandler, 1, &keyupEvent, NULL, NULL
+		);
+
+		EventHotKeyID hkid = {.id = handle};
+		s = RegisterEventHotKey(
+			key, mod, hkid, GetApplicationEventTarget(), 0, ref
+		);
+	});
+	if (s != noErr) {
+		return -1;
+	}
+	return 0;
+}
+
+int unregisterHotKey(EventHotKeyRef ref) {
+	OSStatus s = UnregisterEventHotKey(ref);
+	if (s != noErr) {
+		return -1;
+	}
+	return 0;
+}