JoystickController.m

   1 //
   2 //  JoystickController.m
   3 //  Enjoy
   4 //
   5 //  Created by Sam McCall on 4/05/09.
   6 //
   7
   8 #import "JoystickController.h"
   9
  10 #import "Config.h"
  11 #import "ConfigsController.h"
  12 #import "Joystick.h"
  13 #import "JSAction.h"
  14 #import "Target.h"
  15 #import "TargetController.h"
  16
  17 @implementation JoystickController {
  18     IOHIDManagerRef hidManager;
  19     NSTimer *continuousTimer;
  20     NSMutableArray *runningTargets;
  21 }
  22
  23 - (id)init {
  24     if ((self = [super init])) {
  25         _joysticks = [[NSMutableArray alloc] initWithCapacity:16];
  26         runningTargets = [[NSMutableArray alloc] initWithCapacity:32];
  27     }
  28     return self;
  29 }
  30
  31 - (void)dealloc {
  32     [continuousTimer invalidate];
  33     IOHIDManagerClose(hidManager, kIOHIDOptionsTypeNone);
  34     CFRelease(hidManager);
  35 }
  36
  37 - (void)expandRecursive:(id)handler {
  38     if ([handler base])
  39         [self expandRecursive:[handler base]];
  40     [outlineView expandItem:handler];
  41 }
  42
  43 - (void)addRunningTarget:(Target *)target {
  44     if (![runningTargets containsObject:target]) {
  45         [runningTargets addObject:target];
  46     }
  47     if (!continuousTimer) {
  48         continuousTimer = [NSTimer scheduledTimerWithTimeInterval:1.f/60.f
  49                                                            target:self
  50                                                          selector:@selector(updateContinuousActions:)
  51                                                          userInfo:nil
  52                                                           repeats:YES];
  53         NSLog(@"Scheduled continuous target timer.");
  54     }
  55 }
  56
  57 static void input_callback(void *ctx, IOReturn inResult, void *inSender, IOHIDValueRef value) {
  58     JoystickController *controller = (__bridge JoystickController *)ctx;
  59     IOHIDDeviceRef device = IOHIDQueueGetDevice(inSender);
  60
  61     Joystick *js = [controller findJoystickByRef:device];
  62     if (controller.sendingRealEvents) {
  63         JSAction *mainAction = [js actionForEvent:value];
  64         [mainAction notifyEvent:value];
  65         NSArray *children = mainAction.children ? mainAction.children : mainAction ? @[mainAction] : @[];
  66         for (JSAction *subaction in children) {
  67             Target *target = controller.currentConfig[subaction];
  68             target.magnitude = mainAction.magnitude;
  69             target.running = subaction.active;
  70             if (target.running && target.isContinuous)
  71                 [controller addRunningTarget:target];
  72         }
  73     } else if ([NSApplication sharedApplication].isActive
  74                && [NSApplication sharedApplication].mainWindow.isVisible) {
  75         JSAction *handler = [js handlerForEvent:value];
  76         if (!handler)
  77             return;
  78
  79         [controller expandRecursive:handler];
  80         [controller->outlineView selectRowIndexes:[NSIndexSet indexSetWithIndex:[controller->outlineView rowForItem:handler]] byExtendingSelection: NO];
  81         [controller->targetController focusKey];
  82     }
  83 }
  84
  85 static int findAvailableIndex(NSArray *list, Joystick *js) {
  86     for (int index = 1; ; index++) {
  87         BOOL available = YES;
  88         for (Joystick *used in list) {
  89             if ([used.productName isEqualToString:js.productName] && used.index == index) {
  90                 available = NO;
  91                 break;
  92             }
  93         }
  94         if (available)
  95             return index;
  96     }
  97 }
  98
  99 static void add_callback(void *ctx, IOReturn inResult, void *inSender, IOHIDDeviceRef device) {
 100     JoystickController *controller = (__bridge JoystickController *)ctx;
 101     IOHIDDeviceRegisterInputValueCallback(device, input_callback, (__bridge void*)controller);
 102     Joystick *js = [[Joystick alloc] initWithDevice:device];
 103     js.index = findAvailableIndex(controller.joysticks, js);
 104     [[controller joysticks] addObject:js];
 105     [controller->outlineView reloadData];
 106 }
 107
 108 - (Joystick *)findJoystickByRef:(IOHIDDeviceRef)device {
 109     for (Joystick *js in _joysticks)
 110         if (js.device == device)
 111             return js;
 112     return nil;
 113 }
 114
 115 static void remove_callback(void *ctx, IOReturn inResult, void *inSender, IOHIDDeviceRef device) {
 116     JoystickController *controller = (__bridge JoystickController *)ctx;
 117     Joystick *match = [controller findJoystickByRef:device];
 118     IOHIDDeviceRegisterInputValueCallback(device, NULL, NULL);
 119     if (match) {
 120         [controller.joysticks removeObject:match];
 121         [controller->outlineView reloadData];
 122     }
 123 }
 124
 125 - (void)updateContinuousActions:(NSTimer *)timer {
 126     self.mouseLoc = [NSEvent mouseLocation];
 127     for (Target *target in [runningTargets copy]) {
 128         if (![target update:self]) {
 129             [runningTargets removeObject:target];
 130         }
 131     }
 132     if (!runningTargets.count) {
 133         [continuousTimer invalidate];
 134         continuousTimer = nil;
 135         NSLog(@"Unscheduled continuous target timer.");
 136     }
 137 }
 138
 139 #define NSSTR(e) ((NSString *)CFSTR(e))
 140
 141 - (void)setup {
 142     hidManager = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
 143     NSArray *criteria = @[ @{ NSSTR(kIOHIDDeviceUsagePageKey) : @(kHIDPage_GenericDesktop),
 144                               NSSTR(kIOHIDDeviceUsageKey) : @(kHIDUsage_GD_Joystick) },
 145                            @{ NSSTR(kIOHIDDeviceUsagePageKey) : @(kHIDPage_GenericDesktop),
 146                               NSSTR(kIOHIDDeviceUsageKey) : @(kHIDUsage_GD_GamePad) },
 147                            @{ NSSTR(kIOHIDDeviceUsagePageKey) : @(kHIDPage_GenericDesktop),
 148                               NSSTR(kIOHIDDeviceUsageKey) : @(kHIDUsage_GD_MultiAxisController) }
 149                            ];
 150     IOHIDManagerSetDeviceMatchingMultiple(hidManager, (__bridge CFArrayRef)criteria);
 151
 152     IOHIDManagerScheduleWithRunLoop(hidManager, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
 153     IOReturn ret = IOHIDManagerOpen(hidManager, kIOHIDOptionsTypeNone);
 154     if (ret != kIOReturnSuccess) {
 155         [[NSAlert alertWithMessageText:@"Input devices are unavailable"
 156                          defaultButton:nil
 157                        alternateButton:nil
 158                            otherButton:nil
 159              informativeTextWithFormat:@"Error 0x%08x occured trying to access your devices. "
 160                                        @"Input may not be correctly detected or mapped.",
 161                                        ret]
 162          runModal];
 163     }
 164
 165     IOHIDManagerRegisterDeviceMatchingCallback(hidManager, add_callback, (__bridge void *)self);
 166     IOHIDManagerRegisterDeviceRemovalCallback(hidManager, remove_callback, (__bridge void *)self);
 167 }
 168
 169 - (Config *)currentConfig {
 170     return configsController.currentConfig;
 171 }
 172
 173 - (JSAction *)selectedAction {
 174     id item = [outlineView itemAtRow:outlineView.selectedRow];
 175     return [item children] ? nil : item;
 176 }
 177
 178 - (int)outlineView:(NSOutlineView *)outlineView numberOfChildrenOfItem:(id)item {
 179     return item ? [[item children] count] : _joysticks.count;
 180 }
 181
 182 - (BOOL)outlineView:(NSOutlineView *)outlineView isItemExpandable:(id)item {
 183     return item ? [[item children] count] > 0: YES;
 184 }
 185
 186 - (id)outlineView:(NSOutlineView *)outlineView child:(int)index ofItem:(id)item {
 187     return item ? [item children][index] : _joysticks[index];
 188 }
 189
 190 - (id)outlineView:(NSOutlineView *)outlineView objectValueForTableColumn:(NSTableColumn *)tableColumn byItem:(id)item  {
 191     if(item == nil)
 192         return @"root";
 193     return [item name];
 194 }
 195
 196 - (void)outlineViewSelectionDidChange:(NSNotification *)notification {
 197     [targetController loadCurrent];
 198 }
 199
 200 @end