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Walks a few steps further along device inspection.

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This commit is contained in:
Thomas Harte 2018-07-20 23:33:04 -04:00
parent 09950d9414
commit 8d18808efe
1 changed files with 63 additions and 2 deletions
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65
OSBindings/Mac/Clock Signal/Joystick Manager/CSJoystickManager.m
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@ -11,21 +11,29 @@
@import IOKit;
#include <IOKit/hid/IOHIDLib.h>
@interface CSJoystickManager ()
- (void)deviceMatched:(IOHIDDeviceRef)device result:(IOReturn)result sender:(void *)sender;
- (void)deviceRemoved:(IOHIDDeviceRef)device result:(IOReturn)result sender:(void *)sender;
@end
static void DeviceMatched(void *context, IOReturn result, void *sender, IOHIDDeviceRef device) {
NSLog(@"Matched");
[(__bridge CSJoystickManager *)context deviceMatched:device result:result sender:sender];
}
static void DeviceRemoved(void *context, IOReturn result, void *sender, IOHIDDeviceRef device) {
NSLog(@"Removed");
[(__bridge CSJoystickManager *)context deviceRemoved:device result:result sender:sender];
}
@implementation CSJoystickManager {
IOHIDManagerRef _hidManager;
NSMutableSet<NSValue *> *_activeDevices;
}
- (instancetype)init {
self = [super init];
if(self) {
_activeDevices = [[NSMutableSet alloc] init];
_hidManager = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
if(!_hidManager) return nil;
@ -56,4 +64,57 @@ static void DeviceRemoved(void *context, IOReturn result, void *sender, IOHIDDev
CFRelease(_hidManager);
}
- (void)deviceMatched:(IOHIDDeviceRef)device result:(IOReturn)result sender:(void *)sender {
NSValue *const deviceKey = [NSValue valueWithPointer:device];
if([_activeDevices containsObject:deviceKey]) {
return;
}
[_activeDevices addObject:deviceKey];
NSLog(@"Matched");
const CFArrayRef elements = IOHIDDeviceCopyMatchingElements(device, NULL, kIOHIDOptionsTypeNone);
for(CFIndex index = 0; index < CFArrayGetCount(elements); ++index) {
const IOHIDElementRef element = (IOHIDElementRef)CFArrayGetValueAtIndex(elements, index);
// Check that this element is either on the generic desktop page or else is a button.
const uint32_t usagePage = IOHIDElementGetUsagePage(element);
if(usagePage != kHIDPage_GenericDesktop && usagePage != kHIDPage_Button) continue;
// Then inspect the usage and type.
const IOHIDElementType type = IOHIDElementGetType(element);
// IOHIDElementGetCookie
switch(type) {
default: break;
case kIOHIDElementTypeInput_Button:
// Add a buton
break;
case kIOHIDElementTypeInput_Misc:
case kIOHIDElementTypeInput_Axis: {
const uint32_t usage = IOHIDElementGetUsage(element);
// Add something depending on usage...
} break;
case kIOHIDElementTypeCollection:
// TODO: recurse.
break;
}
}
CFRelease(elements);
}
- (void)deviceRemoved:(IOHIDDeviceRef)device result:(IOReturn)result sender:(void *)sender {
NSValue *const deviceKey = [NSValue valueWithPointer:device];
if(![_activeDevices containsObject:deviceKey]) {
return;
}
[_activeDevices removeObject:deviceKey];
NSLog(@"Removed");
}
@end