1 files changed, 587 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/video/uikit/SDL_uikitview.m b/contrib/SDL-3.2.8/src/video/uikit/SDL_uikitview.m
new file mode 100644
index 0000000..ba3b09b
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/video/uikit/SDL_uikitview.m
@@ -0,0 +1,587 @@
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+ This software is provided 'as-is', without any express or implied
+ warranty.  In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+    claim that you wrote the original software. If you use this software
+    in a product, an acknowledgment in the product documentation would be
+    appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as being the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifdef SDL_VIDEO_DRIVER_UIKIT
+
+#include "SDL_uikitview.h"
+
+#include "../../events/SDL_mouse_c.h"
+#include "../../events/SDL_touch_c.h"
+#include "../../events/SDL_events_c.h"
+
+#include "SDL_uikitappdelegate.h"
+#include "SDL_uikitevents.h"
+#include "SDL_uikitmodes.h"
+#include "SDL_uikitpen.h"
+#include "SDL_uikitwindow.h"
+
+// The maximum number of mouse buttons we support
+#define MAX_MOUSE_BUTTONS 5
+
+// This is defined in SDL_sysjoystick.m
+#ifndef SDL_JOYSTICK_DISABLED
+extern int SDL_AppleTVRemoteOpenedAsJoystick;
+#endif
+
+@implementation SDL_uikitview
+{
+    SDL_Window *sdlwindow;
+
+    SDL_TouchID directTouchId;
+    SDL_TouchID indirectTouchId;
+
+#if !defined(SDL_PLATFORM_TVOS)
+    UIPointerInteraction *indirectPointerInteraction API_AVAILABLE(ios(13.4));
+#endif
+}
+
+- (instancetype)initWithFrame:(CGRect)frame
+{
+    if ((self = [super initWithFrame:frame])) {
+#ifdef SDL_PLATFORM_TVOS
+        // Apple TV Remote touchpad swipe gestures.
+        UISwipeGestureRecognizer *swipeUp = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
+        swipeUp.direction = UISwipeGestureRecognizerDirectionUp;
+        [self addGestureRecognizer:swipeUp];
+
+        UISwipeGestureRecognizer *swipeDown = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
+        swipeDown.direction = UISwipeGestureRecognizerDirectionDown;
+        [self addGestureRecognizer:swipeDown];
+
+        UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
+        swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
+        [self addGestureRecognizer:swipeLeft];
+
+        UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
+        swipeRight.direction = UISwipeGestureRecognizerDirectionRight;
+        [self addGestureRecognizer:swipeRight];
+#endif
+
+        self.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
+        self.autoresizesSubviews = YES;
+
+        directTouchId = 1;
+        indirectTouchId = 2;
+
+#ifndef SDL_PLATFORM_TVOS
+        self.multipleTouchEnabled = YES;
+        SDL_AddTouch(directTouchId, SDL_TOUCH_DEVICE_DIRECT, "");
+
+        if (@available(iOS 13.0, *)) {
+            UIHoverGestureRecognizer *pencilRecognizer = [[UIHoverGestureRecognizer alloc] initWithTarget:self action:@selector(pencilHovering:)];
+            pencilRecognizer.allowedTouchTypes = @[@(UITouchTypePencil)];
+            [self addGestureRecognizer:pencilRecognizer];
+        }
+
+        if (@available(iOS 13.4, *)) {
+            indirectPointerInteraction = [[UIPointerInteraction alloc] initWithDelegate:self];
+            [self addInteraction:indirectPointerInteraction];
+
+            UIHoverGestureRecognizer *indirectPointerRecognizer = [[UIHoverGestureRecognizer alloc] initWithTarget:self action:@selector(indirectPointerHovering:)];
+            indirectPointerRecognizer.allowedTouchTypes = @[@(UITouchTypeIndirectPointer)];
+            [self addGestureRecognizer:indirectPointerRecognizer];
+        }
+#endif // !defined(SDL_PLATFORM_TVOS)
+    }
+
+    return self;
+}
+
+- (void)setSDLWindow:(SDL_Window *)window
+{
+    SDL_UIKitWindowData *data = nil;
+
+    if (window == sdlwindow) {
+        return;
+    }
+
+    // Remove ourself from the old window.
+    if (sdlwindow) {
+        SDL_uikitview *view = nil;
+        data = (__bridge SDL_UIKitWindowData *)sdlwindow->internal;
+
+        [data.views removeObject:self];
+
+        [self removeFromSuperview];
+
+        // Restore the next-oldest view in the old window.
+        view = data.views.lastObject;
+
+        data.viewcontroller.view = view;
+
+        data.uiwindow.rootViewController = nil;
+        data.uiwindow.rootViewController = data.viewcontroller;
+
+        [data.uiwindow layoutIfNeeded];
+    }
+
+    sdlwindow = window;
+
+    // Add ourself to the new window.
+    if (window) {
+        data = (__bridge SDL_UIKitWindowData *)window->internal;
+
+        // Make sure the SDL window has a strong reference to this view.
+        [data.views addObject:self];
+
+        // Replace the view controller's old view with this one.
+        [data.viewcontroller.view removeFromSuperview];
+        data.viewcontroller.view = self;
+
+        /* The root view controller handles rotation and the status bar.
+         * Assigning it also adds the controller's view to the window. We
+         * explicitly re-set it to make sure the view is properly attached to
+         * the window. Just adding the sub-view if the root view controller is
+         * already correct causes orientation issues on iOS 7 and below. */
+        data.uiwindow.rootViewController = nil;
+        data.uiwindow.rootViewController = data.viewcontroller;
+
+        /* The view's bounds may not be correct until the next event cycle. That
+         * might happen after the current dimensions are queried, so we force a
+         * layout now to immediately update the bounds. */
+        [data.uiwindow layoutIfNeeded];
+    }
+}
+
+- (SDL_Window *)getSDLWindow
+{
+    return sdlwindow;
+}
+
+#if !defined(SDL_PLATFORM_TVOS)
+
+- (UIPointerRegion *)pointerInteraction:(UIPointerInteraction *)interaction regionForRequest:(UIPointerRegionRequest *)request defaultRegion:(UIPointerRegion *)defaultRegion API_AVAILABLE(ios(13.4))
+{
+    return [UIPointerRegion regionWithRect:self.bounds identifier:nil];
+}
+
+- (UIPointerStyle *)pointerInteraction:(UIPointerInteraction *)interaction styleForRegion:(UIPointerRegion *)region API_AVAILABLE(ios(13.4))
+{
+    if (SDL_CursorVisible()) {
+        return nil;
+    } else {
+        return [UIPointerStyle hiddenPointerStyle];
+    }
+}
+
+- (void)indirectPointerHovering:(UIHoverGestureRecognizer *)recognizer API_AVAILABLE(ios(13.4))
+{
+    switch (recognizer.state) {
+        case UIGestureRecognizerStateBegan:
+        case UIGestureRecognizerStateChanged:
+        {
+            CGPoint point = [recognizer locationInView:self];
+            SDL_SendMouseMotion(0, sdlwindow, SDL_GLOBAL_MOUSE_ID, false, point.x, point.y);
+            break;
+        }
+
+        default:
+            break;
+    }
+}
+
+- (void)indirectPointerMoving:(UITouch *)touch API_AVAILABLE(ios(13.4))
+{
+    CGPoint locationInView = [self touchLocation:touch shouldNormalize:NO];
+    SDL_SendMouseMotion(0, sdlwindow, SDL_GLOBAL_MOUSE_ID, false, locationInView.x, locationInView.y);
+}
+
+- (void)indirectPointerPressed:(UITouch *)touch fromEvent:(UIEvent *)event API_AVAILABLE(ios(13.4))
+{
+    if (!SDL_HasMouse()) {
+        int i;
+
+        for (i = 1; i <= MAX_MOUSE_BUTTONS; ++i) {
+            if (event.buttonMask & SDL_BUTTON_MASK(i)) {
+                Uint8 button;
+
+                switch (i) {
+                case 1:
+                    button = SDL_BUTTON_LEFT;
+                    break;
+                case 2:
+                    button = SDL_BUTTON_RIGHT;
+                    break;
+                case 3:
+                    button = SDL_BUTTON_MIDDLE;
+                    break;
+                default:
+                    button = (Uint8)i;
+                    break;
+                }
+                SDL_SendMouseButton(UIKit_GetEventTimestamp([touch timestamp]), sdlwindow, SDL_GLOBAL_MOUSE_ID, button, true);
+            }
+        }
+    }
+}
+
+- (void)indirectPointerReleased:(UITouch *)touch fromEvent:(UIEvent *)event API_AVAILABLE(ios(13.4))
+{
+    if (!SDL_HasMouse()) {
+        int i;
+        SDL_MouseButtonFlags buttons = SDL_GetMouseState(NULL, NULL);
+
+        for (i = 0; i < MAX_MOUSE_BUTTONS; ++i) {
+            if (buttons & SDL_BUTTON_MASK(i)) {
+                SDL_SendMouseButton(UIKit_GetEventTimestamp([touch timestamp]), sdlwindow, SDL_GLOBAL_MOUSE_ID, (Uint8)i, false);
+            }
+        }
+    }
+}
+
+- (void)pencilHovering:(UIHoverGestureRecognizer *)recognizer API_AVAILABLE(ios(13.0))
+{
+    switch (recognizer.state) {
+        case UIGestureRecognizerStateBegan:
+        case UIGestureRecognizerStateChanged:
+            UIKit_HandlePenHover(self, recognizer);
+            break;
+
+        case UIGestureRecognizerStateEnded:
+        case UIGestureRecognizerStateCancelled:
+            // we track touches elsewhere, so if a hover "ends" we'll deal with that there.
+            break;
+
+        default:
+            break;
+    }
+}
+
+- (void)pencilMoving:(UITouch *)touch
+{
+    UIKit_HandlePenMotion(self, touch);
+}
+
+- (void)pencilPressed:(UITouch *)touch
+{
+    UIKit_HandlePenPress(self, touch);
+}
+
+- (void)pencilReleased:(UITouch *)touch
+{
+    UIKit_HandlePenRelease(self, touch);
+}
+
+#endif // !defined(SDL_PLATFORM_TVOS)
+
+- (SDL_TouchDeviceType)touchTypeForTouch:(UITouch *)touch
+{
+    if (touch.type == UITouchTypeIndirect) {
+        return SDL_TOUCH_DEVICE_INDIRECT_RELATIVE;
+    }
+    return SDL_TOUCH_DEVICE_DIRECT;
+}
+
+- (SDL_TouchID)touchIdForType:(SDL_TouchDeviceType)type
+{
+    switch (type) {
+    case SDL_TOUCH_DEVICE_DIRECT:
+    default:
+        return directTouchId;
+    case SDL_TOUCH_DEVICE_INDIRECT_RELATIVE:
+        return indirectTouchId;
+    }
+}
+
+- (CGPoint)touchLocation:(UITouch *)touch shouldNormalize:(BOOL)normalize
+{
+    CGPoint point = [touch locationInView:self];
+
+    if (normalize) {
+        CGRect bounds = self.bounds;
+        point.x /= bounds.size.width;
+        point.y /= bounds.size.height;
+    }
+
+    return point;
+}
+
+- (float)pressureForTouch:(UITouch *)touch
+{
+    return (float)touch.force;
+}
+
+- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
+{
+    for (UITouch *touch in touches) {
+#if !defined(SDL_PLATFORM_TVOS)
+        if (@available(iOS 13.0, *)) {
+            if (touch.type == UITouchTypePencil) {
+                [self pencilPressed:touch];
+                continue;
+            }
+        }
+
+        if (@available(iOS 13.4, *)) {
+            if (touch.type == UITouchTypeIndirectPointer) {
+                [self indirectPointerPressed:touch fromEvent:event];
+                continue;
+            }
+        }
+#endif // !defined(SDL_PLATFORM_TVOS)
+
+        SDL_TouchDeviceType touchType = [self touchTypeForTouch:touch];
+        SDL_TouchID touchId = [self touchIdForType:touchType];
+        float pressure = [self pressureForTouch:touch];
+
+        if (SDL_AddTouch(touchId, touchType, "") < 0) {
+            continue;
+        }
+
+        // FIXME, need to send: int clicks = (int) touch.tapCount; ?
+
+        CGPoint locationInView = [self touchLocation:touch shouldNormalize:YES];
+        SDL_SendTouch(UIKit_GetEventTimestamp([event timestamp]),
+                      touchId, (SDL_FingerID)(uintptr_t)touch, sdlwindow,
+                      SDL_EVENT_FINGER_DOWN, locationInView.x, locationInView.y, pressure);
+    }
+}
+
+- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
+{
+    for (UITouch *touch in touches) {
+#if !defined(SDL_PLATFORM_TVOS)
+        if (@available(iOS 13.0, *)) {
+            if (touch.type == UITouchTypePencil) {
+                [self pencilReleased:touch];
+                continue;
+            }
+        }
+
+        if (@available(iOS 13.4, *)) {
+            if (touch.type == UITouchTypeIndirectPointer) {
+                [self indirectPointerReleased:touch fromEvent:event];
+                continue;
+            }
+        }
+#endif // !defined(SDL_PLATFORM_TVOS)
+
+        SDL_TouchDeviceType touchType = [self touchTypeForTouch:touch];
+        SDL_TouchID touchId = [self touchIdForType:touchType];
+        float pressure = [self pressureForTouch:touch];
+
+        if (SDL_AddTouch(touchId, touchType, "") < 0) {
+            continue;
+        }
+
+        // FIXME, need to send: int clicks = (int) touch.tapCount; ?
+
+        CGPoint locationInView = [self touchLocation:touch shouldNormalize:YES];
+        SDL_SendTouch(UIKit_GetEventTimestamp([event timestamp]),
+                      touchId, (SDL_FingerID)(uintptr_t)touch, sdlwindow,
+                      SDL_EVENT_FINGER_UP, locationInView.x, locationInView.y, pressure);
+    }
+}
+
+- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
+{
+    for (UITouch *touch in touches) {
+#if !defined(SDL_PLATFORM_TVOS)
+        if (@available(iOS 13.0, *)) {
+            if (touch.type == UITouchTypePencil) {
+                [self pencilReleased:touch];
+                continue;
+            }
+        }
+
+        if (@available(iOS 13.4, *)) {
+            if (touch.type == UITouchTypeIndirectPointer) {
+                [self indirectPointerReleased:touch fromEvent:event];
+                continue;
+            }
+        }
+#endif // !defined(SDL_PLATFORM_TVOS)
+
+        SDL_TouchDeviceType touchType = [self touchTypeForTouch:touch];
+        SDL_TouchID touchId = [self touchIdForType:touchType];
+        float pressure = [self pressureForTouch:touch];
+
+        if (SDL_AddTouch(touchId, touchType, "") < 0) {
+            continue;
+        }
+
+        CGPoint locationInView = [self touchLocation:touch shouldNormalize:YES];
+        SDL_SendTouch(UIKit_GetEventTimestamp([event timestamp]),
+                      touchId, (SDL_FingerID)(uintptr_t)touch, sdlwindow,
+                      SDL_EVENT_FINGER_CANCELED, locationInView.x, locationInView.y, pressure);
+    }
+}
+
+- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
+{
+    for (UITouch *touch in touches) {
+#if !defined(SDL_PLATFORM_TVOS)
+        if (@available(iOS 13.0, *)) {
+            if (touch.type == UITouchTypePencil) {
+                [self pencilMoving:touch];
+                continue;
+            }
+        }
+
+        if (@available(iOS 13.4, *)) {
+            if (touch.type == UITouchTypeIndirectPointer) {
+                [self indirectPointerMoving:touch];
+                continue;
+            }
+        }
+#endif  // !defined(SDL_PLATFORM_TVOS)
+
+        SDL_TouchDeviceType touchType = [self touchTypeForTouch:touch];
+        SDL_TouchID touchId = [self touchIdForType:touchType];
+        float pressure = [self pressureForTouch:touch];
+
+        if (SDL_AddTouch(touchId, touchType, "") < 0) {
+            continue;
+        }
+
+        CGPoint locationInView = [self touchLocation:touch shouldNormalize:YES];
+        SDL_SendTouchMotion(UIKit_GetEventTimestamp([event timestamp]),
+                            touchId, (SDL_FingerID)(uintptr_t)touch, sdlwindow,
+                            locationInView.x, locationInView.y, pressure);
+    }
+}
+
+- (void)safeAreaInsetsDidChange
+{
+    // Update the safe area insets
+    SDL_SetWindowSafeAreaInsets(sdlwindow,
+                                (int)SDL_ceilf(self.safeAreaInsets.left),
+                                (int)SDL_ceilf(self.safeAreaInsets.right),
+                                (int)SDL_ceilf(self.safeAreaInsets.top),
+                                (int)SDL_ceilf(self.safeAreaInsets.bottom));
+}
+
+- (SDL_Scancode)scancodeFromPress:(UIPress *)press
+{
+    if (press.key != nil) {
+        return (SDL_Scancode)press.key.keyCode;
+    }
+
+#ifndef SDL_JOYSTICK_DISABLED
+    // Presses from Apple TV remote
+    if (!SDL_AppleTVRemoteOpenedAsJoystick) {
+        switch (press.type) {
+        case UIPressTypeUpArrow:
+            return SDL_SCANCODE_UP;
+        case UIPressTypeDownArrow:
+            return SDL_SCANCODE_DOWN;
+        case UIPressTypeLeftArrow:
+            return SDL_SCANCODE_LEFT;
+        case UIPressTypeRightArrow:
+            return SDL_SCANCODE_RIGHT;
+        case UIPressTypeSelect:
+            // HIG says: "primary button behavior"
+            return SDL_SCANCODE_RETURN;
+        case UIPressTypeMenu:
+            // HIG says: "returns to previous screen"
+            return SDL_SCANCODE_ESCAPE;
+        case UIPressTypePlayPause:
+            // HIG says: "secondary button behavior"
+            return SDL_SCANCODE_PAUSE;
+        default:
+            break;
+        }
+    }
+#endif // !SDL_JOYSTICK_DISABLED
+
+    return SDL_SCANCODE_UNKNOWN;
+}
+
+- (void)pressesBegan:(NSSet<UIPress *> *)presses withEvent:(UIPressesEvent *)event
+{
+    if (!SDL_HasKeyboard()) {
+        for (UIPress *press in presses) {
+            SDL_Scancode scancode = [self scancodeFromPress:press];
+            SDL_SendKeyboardKey(UIKit_GetEventTimestamp([event timestamp]), SDL_GLOBAL_KEYBOARD_ID, 0, scancode, true);
+        }
+    }
+    if (SDL_TextInputActive(sdlwindow)) {
+        [super pressesBegan:presses withEvent:event];
+    }
+}
+
+- (void)pressesEnded:(NSSet<UIPress *> *)presses withEvent:(UIPressesEvent *)event
+{
+    if (!SDL_HasKeyboard()) {
+        for (UIPress *press in presses) {
+            SDL_Scancode scancode = [self scancodeFromPress:press];
+            SDL_SendKeyboardKey(UIKit_GetEventTimestamp([event timestamp]), SDL_GLOBAL_KEYBOARD_ID, 0, scancode, false);
+        }
+    }
+    if (SDL_TextInputActive(sdlwindow)) {
+        [super pressesEnded:presses withEvent:event];
+    }
+}
+
+- (void)pressesCancelled:(NSSet<UIPress *> *)presses withEvent:(UIPressesEvent *)event
+{
+    if (!SDL_HasKeyboard()) {
+        for (UIPress *press in presses) {
+            SDL_Scancode scancode = [self scancodeFromPress:press];
+            SDL_SendKeyboardKey(UIKit_GetEventTimestamp([event timestamp]), SDL_GLOBAL_KEYBOARD_ID, 0, scancode, false);
+        }
+    }
+    if (SDL_TextInputActive(sdlwindow)) {
+        [super pressesCancelled:presses withEvent:event];
+    }
+}
+
+- (void)pressesChanged:(NSSet<UIPress *> *)presses withEvent:(UIPressesEvent *)event
+{
+    // This is only called when the force of a press changes.
+    if (SDL_TextInputActive(sdlwindow)) {
+        [super pressesChanged:presses withEvent:event];
+    }
+}
+
+#ifdef SDL_PLATFORM_TVOS
+- (void)swipeGesture:(UISwipeGestureRecognizer *)gesture
+{
+    // Swipe gestures don't trigger begin states.
+    if (gesture.state == UIGestureRecognizerStateEnded) {
+#ifndef SDL_JOYSTICK_DISABLED
+        if (!SDL_AppleTVRemoteOpenedAsJoystick) {
+            /* Send arrow key presses for now, as we don't have an external API
+             * which better maps to swipe gestures. */
+            switch (gesture.direction) {
+            case UISwipeGestureRecognizerDirectionUp:
+                SDL_SendKeyboardKeyAutoRelease(0, SDL_SCANCODE_UP);
+                break;
+            case UISwipeGestureRecognizerDirectionDown:
+                SDL_SendKeyboardKeyAutoRelease(0, SDL_SCANCODE_DOWN);
+                break;
+            case UISwipeGestureRecognizerDirectionLeft:
+                SDL_SendKeyboardKeyAutoRelease(0, SDL_SCANCODE_LEFT);
+                break;
+            case UISwipeGestureRecognizerDirectionRight:
+                SDL_SendKeyboardKeyAutoRelease(0, SDL_SCANCODE_RIGHT);
+                break;
+            }
+        }
+#endif // !SDL_JOYSTICK_DISABLED
+    }
+}
+#endif // SDL_PLATFORM_TVOS
+
+@end
+
+#endif // SDL_VIDEO_DRIVER_UIKIT