Modernized Caps Lock detection and framework improvements by KoalafiedDev:
- Uses macOS's native Carbon framework to detect modifier key state changes.
- Monitors kCGEventFlagsChanged events and checks modifier flags directly.
- Eliminates hardcoded key codes for better compatibility with different keyboard layouts.
- More reliable as it directly detects Caps Lock state, supporting physical and virtual keyboards.
Notes for Num Lock and Scroll Lock:
- macOS lacks built-in constants for these modifiers.
- For support, consider:
- Querying LED states with IOKit.
- Using a USB HID descriptor parser.
- Maintaining a mapping of known key codes for different keyboard types.