IOS7: Implement getHardwareInputSet to get connected devices

Trigger EVENT_INPUT_CHANGED when devices connects to make the ScummVM
engine update the hardware input set.

backends/platform/ios7/ios7_common.h

@@ -44,7 +44,8 @@ enum InputEvent {
 	kInputMainMenu,
 	kInputJoystickAxisMotion,
 	kInputJoystickButtonDown,
-	kInputJoystickButtonUp
+	kInputJoystickButtonUp,
+	kInputChanged
 };
 
 enum ScreenOrientation {

backends/platform/ios7/ios7_game_controller.mm

@@ -34,7 +34,6 @@
 @implementation GameController
 
 @synthesize view;
-@synthesize isConnected;
 
 - (id)initWithView:(iPhoneView *)view {
 	self = [super init];
@@ -45,6 +44,13 @@
 	return self;
 }
 
+// Override the setter method
+- (void)setIsConnected:(BOOL)isConnected {
+	// Inform that input changed
+	_isConnected = isConnected;
+	[view addEvent:InternalEvent(kInputChanged, 0, 0)];
+}
+
 - (void)handlePointerMoveTo:(CGPoint)point {
 	int x, y;
 

backends/platform/ios7/ios7_osys_events.cpp

@@ -137,6 +137,11 @@ bool OSystem_iOS7::pollEvent(Common::Event &event) {
 		case kInputJoystickButtonUp:
 			event.type = Common::EVENT_JOYBUTTON_UP;
 			event.joystick.button = internalEvent.value1;
+
+		case kInputChanged:
+			event.type = Common::EVENT_INPUT_CHANGED;
+			_queuedInputEvent.type = Common::EVENT_INVALID;
+			_queuedEventTime = getMillis() + kQueuedInputEventDelay;
 			break;
 
 		default:

backends/platform/ios7/ios7_osys_main.h

@@ -25,6 +25,7 @@
 #include "graphics/surface.h"
 #include "backends/platform/ios7/ios7_common.h"
 #include "backends/modular-backend.h"
+#include "backends/keymapper/hardware-input.h"
 #include "common/events.h"
 #include "common/str.h"
 #include "common/ustr.h"
@@ -193,6 +194,8 @@ public:
 	void addSysArchivesToSearchSet(Common::SearchSet &s, int priority = 0) override;
 	void getTimeAndDate(TimeDate &td, bool skipRecord = false) const override;
 
+	Common::HardwareInputSet *getHardwareInputSet() override;
+
 	Audio::Mixer *getMixer() override;
 
 	void startSoundsystem();

backends/platform/ios7/ios7_osys_misc.mm

@@ -124,6 +124,23 @@ bool OSystem_iOS7::isConnectionLimited() {
 	return (flags & kSCNetworkReachabilityFlagsIsWWAN);
 }
 
+Common::HardwareInputSet *OSystem_iOS7::getHardwareInputSet() {
+	using namespace Common;
+
+	CompositeHardwareInputSet *inputSet = new CompositeHardwareInputSet();
+	// Ask view about connected controllers
+	if ([[iOS7AppDelegate iPhoneView] isTouchControllerConnected] ||
+		[[iOS7AppDelegate iPhoneView] isMouseControllerConnected]) {
+		inputSet->addHardwareInputSet(new MouseHardwareInputSet(defaultMouseButtons));
+	}
+
+	if ([[iOS7AppDelegate iPhoneView] isGamepadControllerConnected]) {
+		inputSet->addHardwareInputSet(new JoystickHardwareInputSet(defaultJoystickButtons, defaultJoystickAxes));
+	}
+
+	return inputSet;
+}
+
 void OSystem_iOS7::handleEvent_applicationSaveState() {
 	[[iOS7AppDelegate iPhoneView] beginBackgroundSaveStateTask];
 	saveState();

backends/platform/ios7/ios7_video.h

@@ -133,7 +133,9 @@ typedef struct {
 - (bool)fetchEvent:(InternalEvent *)event;
 
 - (bool)getMouseCoords:(CGPoint)point eventX:(int *)x eventY:(int *)y;
-
+- (BOOL)isTouchControllerConnected;
+- (BOOL)isMouseControllerConnected;
+- (BOOL)isGamepadControllerConnected;
 @end
 
 #endif

backends/platform/ios7/ios7_video.mm

@@ -818,6 +818,39 @@ uint getSizeNextPOT(uint size) {
 	return true;
 }
 
+- (BOOL)isControllerTypeConnected:(Class)controller {
+	for (GameController *c : _controllers) {
+		if ([c isConnected]) {
+			if ([c isKindOfClass:controller]) {
+				return YES;
+			}
+		}
+	}
+	return NO;
+}
+
+- (BOOL)isTouchControllerConnected {
+	return [self isControllerTypeConnected:TouchController.class];
+}
+
+- (BOOL)isMouseControllerConnected {
+	if (@available(iOS 14.0, *)) {
+		return [self isControllerTypeConnected:MouseController.class];
+	} else {
+		// Fallback on earlier versions
+		return NO;
+	}
+}
+
+- (BOOL)isGamepadControllerConnected {
+	if (@available(iOS 14.0, *)) {
+		return [self isControllerTypeConnected:GamepadController.class];
+	} else {
+		// Fallback on earlier versions
+		return NO;
+	}
+}
+
 - (void)deviceOrientationChanged:(UIDeviceOrientation)orientation {
 	[self addEvent:InternalEvent(kInputOrientationChanged, orientation, 0)];