(untested) game controller support

1 files changed, 75 insertions, 1 deletions

diff --git a/app/mac/view-controller.mm b/app/mac/view-controller.mm
index 8a1fcbd..eb81b6b 100644
--- a/app/mac/view-controller.mm
+++ b/app/mac/view-controller.mm
@@ -1,5 +1,6 @@
 #import "view-controller.hh"
 #import "controller-adapter-keyboard.hh"
+#import "controller-adapter-gamepad.hh"
 #import "scene.hh"
 
 @implementation ViewController
@@ -7,6 +8,7 @@
 	Scene* _scene;
 	NSSize _sceneSize;
 	ControllerAdapterKeyboard* _keyboardController;
+	NSMutableArray<ControllerAdapterGamepad*>* _gamepadControllers;
 }
 
 - (instancetype)initWithFilePath:(NSString*)filePath
@@ -18,11 +20,35 @@
 		_sceneSize = [_scene size];
 
 		_keyboardController = [[ControllerAdapterKeyboard alloc] init];
-		[_scene setPrimaryController:_keyboardController];
+		_gamepadControllers = [NSMutableArray array];
+		for (GCController* controller in [GCController controllers])
+		{
+			auto gamepad = [controller extendedGamepad];
+			if (gamepad)
+			{
+				auto adapter = [[ControllerAdapterGamepad alloc] initWithProfile:gamepad];
+				[_gamepadControllers addObject:adapter];
+			}
+		}
+		[self updateControllers];
+
+		[[NSNotificationCenter defaultCenter] addObserver:self
+												 selector:@selector(handleControllerConnected:)
+													 name:GCControllerDidConnectNotification
+												   object:nil];
+		[[NSNotificationCenter defaultCenter] addObserver:self
+												 selector:@selector(handleControllerDisconnected:)
+													 name:GCControllerDidDisconnectNotification
+												   object:nil];
 	}
 	return self;
 }
 
+- (void)dealloc
+{
+	[[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
 - (void)loadView
 {
 	auto view = [[SKView alloc] init];
@@ -33,6 +59,54 @@
 	[self setView:view];
 }
 
+- (void)updateControllers
+{
+	// Prefer controllers, then fallback to keyboard input.
+	if ([_gamepadControllers count] >= 1)
+	{
+		[_scene setPrimaryController:[_gamepadControllers objectAtIndex:0]];
+		if ([_gamepadControllers count] >= 2)
+		{
+			[_scene setSecondaryController:[_gamepadControllers objectAtIndex:1]];
+		}
+		else
+		{
+			[_scene setSecondaryController:_keyboardController];
+		}
+	}
+	else
+	{
+		[_scene setPrimaryController:_keyboardController];
+		[_scene setSecondaryController:nil];
+	}
+}
+
+- (void)handleControllerConnected:(NSNotification*)notification
+{
+	auto controller = (GCController*)[notification object];
+	auto gamepad = [controller extendedGamepad];
+	if (gamepad)
+	{
+		auto adapter = [[ControllerAdapterGamepad alloc] initWithProfile:gamepad];
+		[_gamepadControllers addObject:adapter];
+	}
+	[self updateControllers];
+}
+
+- (void)handleControllerDisconnected:(NSNotification*)notification
+{
+	auto controller = (GCController*)[notification object];
+	for (auto i = NSUInteger{ [_gamepadControllers count] }; i > 0; --i)
+	{
+		auto adapter = [_gamepadControllers objectAtIndex:(i - 1)];
+		if ([[adapter profile] controller] == controller)
+		{
+			[_gamepadControllers removeObjectAtIndex:(i - 1)];
+		}
+	}
+	[self updateControllers];
+}
+
 - (NSSize)minimumDisplaySize
 {
 	return _sceneSize;