Big rename part 1: 'action' to 'input'.

[enjoyable.git] / NJDevice.m

diff --git a/NJDevice.m b/NJDevice.m
new file mode 100644 (file)
index 0000000..69775d8
--- /dev/null
+++ b/NJDevice.m
@@ -0,0 +1,109 @@
+//
+//  NJDevice.m
+//  Enjoy
+//
+//  Created by Sam McCall on 4/05/09.
+//
+
+#import "NJDevice.h"
+
+#import "NJInput.h"
+#import "NJInputAnalog.h"
+#import "NJInputHat.h"
+#import "NJInputButton.h"
+
+static NSArray *InputsForElement(IOHIDDeviceRef device, id base) {
+    CFArrayRef elements = IOHIDDeviceCopyMatchingElements(device, NULL, kIOHIDOptionsTypeNone);
+    NSMutableArray *children = [NSMutableArray arrayWithCapacity:CFArrayGetCount(elements)];
+    
+    int buttons = 0;
+    int axes = 0;
+    int hats = 0;
+    
+    for (int i = 0; i < CFArrayGetCount(elements); i++) {
+        IOHIDElementRef element = (IOHIDElementRef)CFArrayGetValueAtIndex(elements, i);
+        int type = IOHIDElementGetType(element);
+        unsigned usage = IOHIDElementGetUsage(element);
+        unsigned usagePage = IOHIDElementGetUsagePage(element);
+        long max = IOHIDElementGetPhysicalMax(element);
+        long min = IOHIDElementGetPhysicalMin(element);
+        CFStringRef elName = IOHIDElementGetName(element);
+        
+        NJInput *input = nil;
+        
+        if (!(type == kIOHIDElementTypeInput_Misc
+              || type == kIOHIDElementTypeInput_Axis
+              || type == kIOHIDElementTypeInput_Button))
+             continue;
+        
+        if (max - min == 1 || usagePage == kHIDPage_Button || type == kIOHIDElementTypeInput_Button) {
+            input = [[NJInputButton alloc] initWithName:(__bridge NSString *)elName
+                                                    idx:++buttons
+                                                    max:max];
+        } else if (usage == kHIDUsage_GD_Hatswitch) {
+            input = [[NJInputHat alloc] initWithIndex:++hats];
+        } else if (usage >= kHIDUsage_GD_X && usage <= kHIDUsage_GD_Rz) {
+            input = [[NJInputAnalog alloc] initWithIndex:++axes
+                                                  rawMin:min
+                                                  rawMax:max];
+        } else {
+            continue;
+        }
+        
+        // TODO(jfw): Should be moved into better constructors.
+        input.base = base;
+        input.cookie = IOHIDElementGetCookie(element);
+        [children addObject:input];
+    }
+
+    CFRelease(elements);
+    return children;
+}
+
+@implementation NJDevice {
+    int vendorId;
+    int productId;
+}
+
+- (id)initWithDevice:(IOHIDDeviceRef)dev {
+    if ((self = [super init])) {
+        self.device = dev;
+        self.productName = (__bridge NSString *)IOHIDDeviceGetProperty(dev, CFSTR(kIOHIDProductKey));
+        vendorId = [(__bridge NSNumber *)IOHIDDeviceGetProperty(dev, CFSTR(kIOHIDVendorIDKey)) intValue];
+        productId = [(__bridge NSNumber *)IOHIDDeviceGetProperty(dev, CFSTR(kIOHIDProductIDKey)) intValue];
+        self.children = InputsForElement(dev, self);
+    }
+    return self;
+}
+
+- (NSString *)name {
+    return [NSString stringWithFormat:@"%@ #%d", _productName, _index];
+}
+
+- (id)base {
+    return nil;
+}
+
+- (NSString *)uid {
+    return [NSString stringWithFormat: @"%d:%d:%d", vendorId, productId, _index];
+}
+
+- (NJInput *)findInputByCookie:(IOHIDElementCookie)cookie {
+    for (NJInput *child in _children)
+        if (child.cookie == cookie)
+            return child;
+    return nil;
+}
+
+- (NJInput *)handlerForEvent:(IOHIDValueRef)value {
+    NJInput *mainInput = [self inputForEvent:value];
+    return [mainInput findSubInputForValue:value];
+}
+
+- (NJInput *)inputForEvent:(IOHIDValueRef)value {
+    IOHIDElementRef elt = IOHIDValueGetElement(value);
+    IOHIDElementCookie cookie = IOHIDElementGetCookie(elt);
+    return [self findInputByCookie:cookie];
+}
+
+@end