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[enjoyable.git] / JSActionHat.m

diff --git a/JSActionHat.m b/JSActionHat.m
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+//
+//  JSActionHat.m
+//  Enjoy
+//
+//  Created by Sam McCall on 5/05/09.
+//
+
+static BOOL active_eightway[36] = {
+NO,  NO,  NO,  NO , // center
+YES, NO,  NO,  NO , // N
+YES, NO,  NO,  YES, // NE
+NO,  NO,  NO,  YES, // E
+NO,  YES, NO,  YES, // SE
+NO,  YES, NO,  NO , // S
+NO,  YES, YES, NO , // SW
+NO,  NO,  YES, NO , // W
+YES, NO,  YES, NO , // NW
+};
+static BOOL active_fourway[20] = {
+NO,  NO,  NO,  NO , // center
+YES, NO,  NO,  NO , // N
+NO,  NO,  NO,  YES, // E
+NO,  YES, NO,  NO , // S
+NO,  NO,  YES, NO , // W
+};
+
+@implementation JSActionHat
+
+- (id) init {
+       if(self = [super init]) {
+               subActions = [NSArray arrayWithObjects:
+                                         [[SubAction alloc] initWithIndex: 0 name: @"Up" base: self],
+                                         [[SubAction alloc] initWithIndex: 1 name: @"Down" base: self],
+                                         [[SubAction alloc] initWithIndex: 2 name: @"Left" base: self],
+                                         [[SubAction alloc] initWithIndex: 3 name: @"Right" base: self],
+                                         nil
+                                         ];
+               [subActions retain];
+               name = @"Hat switch";
+       }
+       return self;
+}
+
+-(id) findSubActionForValue: (IOHIDValueRef) value {
+       int parsed = IOHIDValueGetIntegerValue(value);
+       if(IOHIDElementGetLogicalMax(IOHIDValueGetElement(value)) == 7) {
+               // 8-way
+               switch(parsed) {
+                       case 0: return [subActions objectAtIndex: 0];
+                       case 4: return [subActions objectAtIndex: 1];
+                       case 6: return [subActions objectAtIndex: 2];
+                       case 2: return [subActions objectAtIndex: 3];
+               }
+       } else  if(IOHIDElementGetLogicalMax(IOHIDValueGetElement(value)) == 8) {
+               // 8-way
+               switch(parsed) {
+                       case 1: return [subActions objectAtIndex: 0];
+                       case 5: return [subActions objectAtIndex: 1];
+                       case 7: return [subActions objectAtIndex: 2];
+                       case 3: return [subActions objectAtIndex: 3];
+               }
+       } else if(IOHIDElementGetLogicalMax(IOHIDValueGetElement(value)) == 3) {
+                       // 4-way
+               switch(parsed) {
+                       case 0: return [subActions objectAtIndex: 0];
+                       case 2: return [subActions objectAtIndex: 1];
+                       case 3: return [subActions objectAtIndex: 2];
+                       case 1: return [subActions objectAtIndex: 3];
+               }
+       } else if(IOHIDElementGetLogicalMax(IOHIDValueGetElement(value)) == 4) {
+               // 4-way
+               switch(parsed) {
+                       case 1: return [subActions objectAtIndex: 0];
+                       case 3: return [subActions objectAtIndex: 1];
+                       case 4: return [subActions objectAtIndex: 2];
+                       case 2: return [subActions objectAtIndex: 3];
+               }
+       }
+       return NULL;
+}
+
+-(void) notifyEvent: (IOHIDValueRef) value {
+       int parsed = IOHIDValueGetIntegerValue(value);
+       int size = IOHIDElementGetLogicalMax(IOHIDValueGetElement(value));
+       if(size == 7 || size == 3) {
+               parsed++;
+               size++;
+       }
+       BOOL* activeSubactions = (size == 8) ? active_eightway : active_fourway;
+       for(int i=0; i<4; i++)
+               [[subActions objectAtIndex: i] setActive: activeSubactions[parsed * 4 + i]];
+}
+
+@end