ppsspp/ios/ViewControllerCommon.mm

#import "ios/CameraHelper.h"
#import "ios/ViewControllerCommon.h"
#import "ios/Controls.h"
#import "ios/IAPManager.h"
#import <Photos/Photos.h>
#import <objc/runtime.h>
#include "Common/System/Request.h"
#include "Common/Input/InputState.h"
#include "Common/System/NativeApp.h"
#include "Common/System/Display.h"
#include "Common/Log.h"
#include "Core/HLE/sceUsbCam.h"
#include "Core/HLE/sceUsbGps.h"
#include "Core/System.h"
#include "Core/Config.h"

// The target of the soft keyboard. It's a view of its own so the keyboard only comes up when we ask
// for it: UIKit hands first responder back to the view controller whenever something it presented
// (a share sheet, a picker, an alert) goes away, and if that were the text input, up it would come.
@interface KeyboardInputView : UIView <UIKeyInput>
@end

@implementation KeyboardInputView

- (BOOL)canBecomeFirstResponder {
	return YES;
}

- (BOOL)hasText {
	// Otherwise the keyboard wouldn't send backspaces.
	return YES;
}

- (void)insertText:(NSString *)text {
	SendKeyboardChars([text UTF8String]);
}

- (void)deleteBackward {
	KeyInput input{};
	input.deviceId = DEVICE_ID_KEYBOARD;
	input.flags = KeyInputFlags::DOWN | KeyInputFlags::UP;
	input.keyCode = NKCODE_DEL;
	NativeKey(input);
}

@end

@interface PPSSPPBaseViewController () {
	CameraHelper *cameraHelper;
	LocationHelper *locationHelper;
	TouchTracker g_touchTracker;
}

@property (strong, nonatomic) NSOperationQueue *accelerometerQueue;
@property (nonatomic) GCController *gameController;
@property (strong, nonatomic) CMMotionManager *motionManager;

@end

@implementation PPSSPPBaseViewController {
	UIScreenEdgePanGestureRecognizer *mBackGestureRecognizer;
	CGSize lastLayoutSize_;
	KeyboardInputView *keyboardInputView_;
}

// Strange idiom for generating unique IDs (within the process, at least).
static const void *kPickerFilenameKey = &kPickerFilenameKey;
static const void *kPickerRequestIdKey = &kPickerRequestIdKey;

static void SetPickerContext(id picker, NSString *filename, int requestId) {
	objc_setAssociatedObject(picker, kPickerFilenameKey, filename, OBJC_ASSOCIATION_COPY_NONATOMIC);
	objc_setAssociatedObject(picker, kPickerRequestIdKey, @(requestId), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

static NSString *GetPickerFilename(id picker) {
	return (NSString *)objc_getAssociatedObject(picker, kPickerFilenameKey);
}

static int GetPickerRequestId(id picker) {
	NSNumber *requestIdNumber = (NSNumber *)objc_getAssociatedObject(picker, kPickerRequestIdKey);
	return requestIdNumber ? requestIdNumber.intValue : -1;
}

- (void)savePickedImage:(UIImage *)image toFilename:(NSString *)targetFilename requestId:(int)requestId {
	NSData *jpegData = UIImageJPEGRepresentation(image, 0.9);
	if (jpegData) {
		[jpegData writeToFile:targetFilename atomically:YES];
		NSLog(@"Saved JPEG image to %@", targetFilename);
		g_requestManager.PostSystemSuccess(requestId, "", 1);
	} else {
		g_requestManager.PostSystemFailure(requestId);
	}
}

- (id)init {
	self = [super init];
	if (self) {
		sharedViewController = self;

		[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appWillTerminate:) name:UIApplicationWillTerminateNotification object:nil];
		[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(controllerDidConnect:) name:GCControllerDidConnectNotification object:nil];
		[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(controllerDidDisconnect:) name:GCControllerDidDisconnectNotification object:nil];

		// Observe orientation changes
		[[NSNotificationCenter defaultCenter] addObserver:self
												selector:@selector(onOrientationChanged)
												name:UIDeviceOrientationDidChangeNotification
												object:nil];

		self.accelerometerQueue = [[NSOperationQueue alloc] init];
		self.accelerometerQueue.name = @"AccelerometerQueue";
		self.accelerometerQueue.maxConcurrentOperationCount = 1;
	}
	return self;
}

// Only means anything for the GL backend, which overrides this.
- (void)bindDefaultFBO {}

- (void)shutdown {
	self.gameController = nil;
	[[NSNotificationCenter defaultCenter] removeObserver:self];

	_dbg_assert_(sharedViewController != nil);
	sharedViewController = nil;
}

- (BOOL)prefersHomeIndicatorAutoHidden {
	if (g_Config.iAppSwitchMode == (int)AppSwitchMode::DOUBLE_SWIPE_INDICATOR) {
		return NO;
	} else {
		return YES;
	}
}

- (void)didBecomeActive {
	if (self.motionManager.accelerometerAvailable) {
		self.motionManager.accelerometerUpdateInterval = 1.0 / 60.0;
		INFO_LOG(Log::G3D, "Starting accelerometer updates.");

		[self.motionManager startAccelerometerUpdatesToQueue:self.accelerometerQueue
							withHandler:^(CMAccelerometerData *accelerometerData, NSError *error) {
			if (error) {
				NSLog(@"Accelerometer error: %@", error);
				return;
			}
			ProcessAccelerometerData(accelerometerData);
		}];
	} else {
		INFO_LOG(Log::G3D, "No accelerometer available, not starting updates.");
	}
}

- (void)willResignActive {
	// Stop accelerometer updates
	if (self.motionManager.accelerometerActive) {
		INFO_LOG(Log::G3D, "Stopping accelerometer updates");
		[self.motionManager stopAccelerometerUpdates];
	}
}

- (void)appWillTerminate:(NSNotification *)notification {
	[self shutdown];
}

- (void)viewDidAppear:(BOOL)animated {
	[super viewDidAppear:animated];
	INFO_LOG(Log::G3D, "viewDidAppear");
	// For hardware keyboard presses.
	[self becomeFirstResponder];
	[self updateGesture];

	// This needs to be called really late during startup, unfortunately.
#if PPSSPP_PLATFORM(IOS_APP_STORE)
	[IAPManager sharedIAPManager];  // Kick off the IAPManager early.
	NSLog(@"viewDidAppear. updating icon");
	dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(4.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
		[[IAPManager sharedIAPManager] updateIcon:false];
	});
#endif  // IOS_APP_STORE
}

// Enables tapping for edge area.
-(UIRectEdge)preferredScreenEdgesDeferringSystemGestures {
	if (GetUIState() == UISTATE_INGAME) {
		// In-game, we need all the control we can get. Though, we could possibly
		// allow the top edge?
		INFO_LOG(Log::System, "Defer system gestures on all edges");
		return UIRectEdgeAll;
	} else {
		INFO_LOG(Log::System, "Allow system gestures on the bottom");
		// Allow task switching gestures to take precedence, without causing
		// scroll events in the UI. Otherwise, we get "ghost" scrolls when switching tasks.
		return UIRectEdgeTop | UIRectEdgeLeft | UIRectEdgeRight;
	}
}

- (void)controllerDidConnect:(NSNotification *)note
{
	if (![[GCController controllers] containsObject:self.gameController]) self.gameController = nil;

	if (self.gameController != nil) return; // already have a connected controller

	[self setupController:(GCController *)note.object];
}

- (void)controllerDidDisconnect:(NSNotification *)note
{
	if (self.gameController == note.object) {
		ShutdownController(self.gameController);
		self.gameController = nil;

		if ([[GCController controllers] count] > 0) {
			[self setupController:[[GCController controllers] firstObject]];
		}
	}
}

- (void)setupController:(GCController *)controller {
	self.gameController = controller;
	if (!InitController(controller)) {
		self.gameController = nil;
	}
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
	g_touchTracker.Began(touches, self.view);
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
	g_touchTracker.Moved(touches, self.view);
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
	g_touchTracker.Ended(touches, self.view);
}

- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
	g_touchTracker.Cancelled(touches, self.view);
}

- (void)pickPhoto:(NSString *)saveFilename requestId:(int)requestId {
	NSLog(@"Picking photo to save to %@ (id: %d)", saveFilename, requestId);
	NSString *targetFilename = [saveFilename copy];

	if (@available(iOS 14.0, *)) {
		PHPickerConfiguration *config = [[PHPickerConfiguration alloc] initWithPhotoLibrary:PHPhotoLibrary.sharedPhotoLibrary];
		config.selectionLimit = 1;
		config.filter = [PHPickerFilter imagesFilter];

		PHPickerViewController *picker = [[PHPickerViewController alloc] initWithConfiguration:config];
		picker.delegate = self;
		SetPickerContext(picker, targetFilename, requestId);
		[self presentViewController:picker animated:YES completion:nil];
		return;
	}

	UIImagePickerController *picker = [[UIImagePickerController alloc] init];
	picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
	// Images only keeps the picker from doing extra video-related setup.
	picker.mediaTypes = @[@"public.image"];
	picker.delegate = self;
	SetPickerContext(picker, targetFilename, requestId);
	[self presentViewController:picker animated:YES completion:nil];
}

- (void)picker:(PHPickerViewController *)picker didFinishPicking:(NSArray<PHPickerResult *> *)results API_AVAILABLE(ios(14.0)) {
	NSString *targetFilename = GetPickerFilename(picker);
	int requestId = GetPickerRequestId(picker);

	[picker dismissViewControllerAnimated:YES completion:nil];

	if (results.count == 0) {
		NSLog(@"User cancelled photo picker");
		g_requestManager.PostSystemFailure(requestId);
		return;
	}

	NSItemProvider *itemProvider = results.firstObject.itemProvider;
	if (![itemProvider canLoadObjectOfClass:[UIImage class]]) {
		NSLog(@"Photo picker result does not provide UIImage");
		g_requestManager.PostSystemFailure(requestId);
		return;
	}

	[itemProvider loadObjectOfClass:[UIImage class] completionHandler:^(UIImage *image, NSError *error) {
		dispatch_async(dispatch_get_main_queue(), ^{
			if (error || !image) {
				NSLog(@"Failed loading picked image: %@", error);
				g_requestManager.PostSystemFailure(requestId);
			} else {
				[self savePickedImage:image toFilename:targetFilename requestId:requestId];
			}
		});
	}];
}

- (void)imagePickerController:(UIImagePickerController *)picker
		didFinishPickingMediaWithInfo:(NSDictionary<UIImagePickerControllerInfoKey,id> *)info {
	NSString *targetFilename = GetPickerFilename(picker);
	int requestId = GetPickerRequestId(picker);

	UIImage *image = info[UIImagePickerControllerOriginalImage];
	[self savePickedImage:image toFilename:targetFilename requestId:requestId];

	[picker dismissViewControllerAnimated:YES completion:nil];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
	NSLog(@"User cancelled image picker");
	int requestId = GetPickerRequestId(picker);

	[picker dismissViewControllerAnimated:YES completion:nil];

	g_requestManager.PostSystemFailure(requestId);
}

- (void)handleSwipeFrom:(UIScreenEdgePanGestureRecognizer *)recognizer {
	if (recognizer.state == UIGestureRecognizerStateEnded) {
		KeyInput key;
		key.flags = KeyInputFlags::DOWN | KeyInputFlags::UP;
		key.keyCode = NKCODE_BACK;
		key.deviceId = DEVICE_ID_TOUCH;
		NativeKey(key);
		INFO_LOG(Log::System, "Detected back swipe");
	}
}

- (void)updateGesture {
	INFO_LOG(Log::System, "Updating swipe gesture.");

	if (mBackGestureRecognizer) {
		INFO_LOG(Log::System, "Removing swipe gesture.");
		[[self view] removeGestureRecognizer:mBackGestureRecognizer];
		mBackGestureRecognizer = nil;
	}

	if (GetUIState() != UISTATE_INGAME) {
		INFO_LOG(Log::System, "Adding swipe gesture.");
		mBackGestureRecognizer = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:) ];
		[mBackGestureRecognizer setEdges:UIRectEdgeLeft];
		[[self view] addGestureRecognizer:mBackGestureRecognizer];
	}
}

- (void)uiStateChanged {
	[self setNeedsUpdateOfScreenEdgesDeferringSystemGestures];
	[self hideKeyboard];
	[self updateGesture];
}

- (void)startVideo:(int)width height:(int)height {
	[cameraHelper startVideo:width h:height];
}

- (void)stopVideo {
	[cameraHelper stopVideo];
}

- (void)PushCameraImageIOS:(long long)len buffer:(unsigned char*)data {
	Camera::pushCameraImage(len, data);
}

- (void)startLocation {
	[locationHelper startLocationUpdates];
}

- (void)stopLocation {
	[locationHelper stopLocationUpdates];
}

- (void)SetGpsDataIOS:(CLLocation *)newLocation {
	GPS::setGpsData((long long)newLocation.timestamp.timeIntervalSince1970,
					newLocation.horizontalAccuracy/5.0,
					newLocation.coordinate.latitude, newLocation.coordinate.longitude,
					newLocation.altitude,
					MAX(newLocation.speed * 3.6, 0.0), /* m/s to km/h */
					0 /* bearing */);
}

- (void)viewDidLoad {
	[super viewDidLoad];

	cameraHelper = [[CameraHelper alloc] init];
	[cameraHelper setDelegate:self];

	locationHelper = [[LocationHelper alloc] init];
	[locationHelper setDelegate:self];

	self.motionManager = [[CMMotionManager alloc] init];

	keyboardInputView_ = [[KeyboardInputView alloc] initWithFrame:CGRectZero];
	[self.view addSubview:keyboardInputView_];
}

extern float g_safeInsetLeft;
extern float g_safeInsetRight;
extern float g_safeInsetTop;
extern float g_safeInsetBottom;

- (void)viewSafeAreaInsetsDidChange {
	[super viewSafeAreaInsetsDidChange];

	// Converts points to pixels, the same way updateResolutionWithView does.
	CGFloat scale = [self displayScaleForView:self.view];

	float xInsetSum = self.view.safeAreaInsets.left + self.view.safeAreaInsets.right;
	float yInsetSum = self.view.safeAreaInsets.top + self.view.safeAreaInsets.bottom;

	// Only use the larger set of insets. The other set, we'll handle through layouts.
	// Also, we'll treat the bottom inset differently: We'll add some space at the end of everything
	// that scrolls so that when you're not at the bottom, we use the full vertical area,
	// just looks better.
	if (xInsetSum > yInsetSum) {
		// Landscape mode insets are larger, use those.
		g_safeInsetLeft = self.view.safeAreaInsets.left * scale;
		g_safeInsetRight = self.view.safeAreaInsets.right * scale;
		g_safeInsetTop = 0.0f;
		g_safeInsetBottom = 0.0f;
	} else {
		// Portrait mode insets are larger, use those.
		g_safeInsetLeft = 0.0f;
		g_safeInsetRight = 0.0f;
		g_safeInsetTop = self.view.safeAreaInsets.top * scale;
		g_safeInsetBottom = self.view.safeAreaInsets.bottom * scale;
	}
}

- (void)shareText:(NSString *)text {
	[self shareItems:@[text]];
}

- (void)shareFile:(NSURL *)url {
	// The share sheet works out the type from the extension.
	[self shareItems:@[url]];
}

- (void)shareItems:(NSArray *)items {
	UIActivityViewController *viewController = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil];
	// On iPad, the share sheet is a popover and needs an anchor.
	viewController.popoverPresentationController.sourceView = self.view;
	viewController.popoverPresentationController.sourceRect = CGRectMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds), 0, 0);
	viewController.popoverPresentationController.permittedArrowDirections = 0;
	[self presentViewController:viewController animated:YES completion:nil];
}

- (void)appSwitchModeChanged {
	[self setNeedsUpdateOfHomeIndicatorAutoHidden];
}

// Main thread, like the rest of these.
- (void)showKeyboard {
	INFO_LOG(Log::System, "showKeyboard");
	[keyboardInputView_ becomeFirstResponder];
}

- (void)hideKeyboard {
	if (keyboardInputView_.isFirstResponder) {
		INFO_LOG(Log::System, "hideKeyboard");
		[keyboardInputView_ resignFirstResponder];
		// Back to us, for hardware keyboard presses. We don't take text, so no keyboard comes with it.
		[self becomeFirstResponder];
	}
}

- (BOOL)canBecomeFirstResponder {
	return YES;
}

- (void)pressesBegan:(NSSet<UIPress *> *)presses withEvent:(UIPressesEvent *)event {
	KeyboardPressesBegan(presses, event);
}

- (void)pressesEnded:(NSSet<UIPress *> *)presses withEvent:(UIPressesEvent *)event {
	KeyboardPressesEnded(presses, event);
}

- (void)pressesCancelled:(NSSet<UIPress *> *)presses withEvent:(UIPressesEvent *)event {
	KeyboardPressesEnded(presses, event);
}

#pragma mark - Status Bar Control

// The immersive mode setting is per-orientation, so we need to know which way we're facing.
// Can't just use g_display for this, since it lags behind during rotation.
// Note: Using viewIfLoaded, since this can get called before the view exists, and we don't want to force it into existence.
- (DeviceOrientation)currentDeviceOrientation {
	UIWindowScene *scene = self.viewIfLoaded.window.windowScene;
	if (scene != nil) {
		return UIInterfaceOrientationIsPortrait(scene.interfaceOrientation) ? DeviceOrientation::Portrait : DeviceOrientation::Landscape;
	}
	CGSize size = self.viewIfLoaded.bounds.size;
	return size.height > size.width ? DeviceOrientation::Portrait : DeviceOrientation::Landscape;
}

// iOS calls this to determine whether to hide the status bar.
// Note that on iPhone, iOS hides it in landscape regardless of what we return here.
- (BOOL)prefersStatusBarHidden {
	return g_Config.GetDisplayLayoutConfig([self currentDeviceOrientation]).bImmersiveMode ? YES : NO;
}

// Optional: choose light/dark text for the status bar
- (UIStatusBarStyle)preferredStatusBarStyle {
	return UIStatusBarStyleLightContent;
}

- (void)onOrientationChanged {
	[self setNeedsStatusBarAppearanceUpdate];
}

// Called from the C++ side when the user toggles the immersive mode setting.
- (void)immersiveModeChanged {
	[self setNeedsStatusBarAppearanceUpdate];
}

- (void)viewWillTransitionToSize:(CGSize)size
		withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
	[super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
	// The immersive mode setting is per-orientation, so the status bar may need to change along with the rotation.
	[self setNeedsStatusBarAppearanceUpdate];
}

// Rotations and window resizes land here. UIKit lays out at the final size at the start of a
// rotation animation, so resizing here (rather than when the rotation completes) keeps the
// backbuffer matching the view while it animates.
- (void)viewDidLayoutSubviews {
	[super viewDidLayoutSubviews];
	CGSize size = self.view.bounds.size;
	if (size.width <= 0.0 || size.height <= 0.0 || CGSizeEqualToSize(size, lastLayoutSize_)) {
		return;
	}
	lastLayoutSize_ = size;
	if (self.view.window.windowScene) {
		[cameraHelper setInterfaceOrientation:self.view.window.windowScene.interfaceOrientation];
	}
	INFO_LOG(Log::G3D, "Laid out at %dx%d", (int)size.width, (int)size.height);
	// Resized in place: NativeFrame picks up the new size and lets the graphics context resize.
	[self updateResolutionWithView:self.view];
}

// Pixels per point. nativeScale, not scale, since that's what the drawable is - they differ on
// some phones, like the Plus models and the minis.
- (CGFloat)displayScaleForView:(UIView *)view {
	if (view.window.windowScene) {
		return view.window.windowScene.screen.nativeScale;
	}
	return [UITraitCollection currentTraitCollection].displayScale;
}

- (void)updateResolutionWithView:(UIView *)view {
	CGFloat scale = [self displayScaleForView:view];

	// The bounds are already corrected for orientation.
	CGSize size = view.bounds.size;

	float dpi = (IS_IPAD() ? 200.0f : 150.0f) * scale;
	const float dpi_scale_x = 240.0f / dpi;
	const float dpi_scale_y = 240.0f / dpi;

	g_display.Recalculate(size.width * scale, size.height * scale,
						 dpi_scale_x, dpi_scale_y,
						 UIScaleFactorToMultiplier(g_Config.iUIScaleFactor));

	[view setContentScaleFactor:scale];

	// NativeFrame updates the PSP_CoreParameter() size along with the rest.
	NativeResized();

	NSLog(@"Updated display resolution: (%d, %d) @%.1fx",
		  g_display.pixel_xres, g_display.pixel_yres, (float)scale);
}

@end