Tweak SplitViewController for vertical iPhone

In vertical orientation, the primary view controller is set to overlay
mode.

Natives/Info.plist

@@ -135,6 +135,7 @@
 	<true/>
 	<key>UISupportedInterfaceOrientations</key>
 	<array>
+		<string>UIInterfaceOrientationPortrait</string>
 		<string>UIInterfaceOrientationLandscapeLeft</string>
 		<string>UIInterfaceOrientationLandscapeRight</string>
 	</array>

Natives/LauncherSplitViewController.m

@@ -3,9 +3,8 @@
 #import "LauncherNavigationController.h"
 #import "utils.h"
 
-@interface LauncherSplitViewController () {
+@interface LauncherSplitViewController ()<UISplitViewControllerDelegate>{
 }
-
 @end
 
 @implementation LauncherSplitViewController
@@ -14,26 +13,47 @@
     [super viewDidLoad];
     UIApplication.sharedApplication.idleTimerDisabled = YES;
     setViewBackgroundColor(self.view);
-
-    //TODO: maximumPrimaryColumnWidth
+    self.delegate = self;
 
     LauncherMenuViewController *masterVc = [[LauncherMenuViewController alloc] init];
     LauncherNavigationController *detailVc = [[LauncherNavigationController alloc] init];
     detailVc.toolbarHidden = NO;
 
-    self.presentsWithGesture = YES;
-    self.preferredDisplayMode = UISplitViewControllerDisplayModeOneBesideSecondary;
-    self.viewControllers = @[[[UINavigationController alloc] initWithRootViewController:masterVc], detailVc];
+    BOOL isPortrait = self.view.frame.size.height > self.view.frame.size.width;
+    self.preferredDisplayMode = isPortrait ?
+        UISplitViewControllerDisplayModeOneOverSecondary :
+        UISplitViewControllerDisplayModeOneBesideSecondary;
     if (@available(iOS 14.0, tvOS 14.0, *)) {
-        self.preferredSplitBehavior =   UISplitViewControllerSplitBehaviorTile;
+        self.preferredSplitBehavior = isPortrait ?
+            UISplitViewControllerSplitBehaviorOverlay :
+            UISplitViewControllerSplitBehaviorTile;
+    }
+
+    self.presentsWithGesture = YES;
+
+    self.viewControllers = @[[[UINavigationController alloc] initWithRootViewController:masterVc], detailVc];
+}
+
+- (void)splitViewController:(UISplitViewController *)svc willChangeToDisplayMode:(UISplitViewControllerDisplayMode)displayMode {
+    if (self.preferredDisplayMode != displayMode) {
+        dispatch_async(dispatch_get_main_queue(), ^{
+            self.preferredDisplayMode = UISplitViewControllerDisplayModeSecondaryOnly;
+        });
     }
 }
 
-- (UITraitCollection *)traitCollection {
-    // Allows splitting on compact-sized iPhones
-    UITraitCollection *collection = super.traitCollection;
-    UITraitCollection *horizontalCollection = [UITraitCollection traitCollectionWithHorizontalSizeClass:UIUserInterfaceSizeClassRegular];
-    return [UITraitCollection traitCollectionWithTraitsFromCollections:@[collection, horizontalCollection]];
+- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
+{
+    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
+
+    self.preferredDisplayMode = size.height > size.width ?
+        UISplitViewControllerDisplayModeOneOverSecondary :
+        UISplitViewControllerDisplayModeOneBesideSecondary;
+    if (@available(iOS 14.0, tvOS 14.0, *)) {
+        self.preferredSplitBehavior = size.height > size.width ?
+            UISplitViewControllerSplitBehaviorOverlay :
+            UISplitViewControllerSplitBehaviorTile;
+    }
 }
 
 - (void)dismissViewController {

Natives/UIKit+hook.m

@@ -39,6 +39,10 @@ __attribute__((constructor)) void hookConstructor(void) {
 
 @implementation UITraitCollection(hook)
 
+- (UIUserInterfaceSizeClass)horizontalSizeClass {
+    return UIUserInterfaceSizeClassRegular;
+}
+
 - (UIUserInterfaceSizeClass)verticalSizeClass {
     return UIUserInterfaceSizeClassRegular;
 }

Natives/utils.h

@@ -70,7 +70,7 @@ void* gbuffer; // OSMesa framebuffer
 long showingWindow;
 int windowWidth, windowHeight;
 int physicalWidth, physicalHeight;
-bool isInputReady, isCursorEntered, isPrepareGrabPos, isUseStackQueueCall;
+BOOL isInputReady, isCursorEntered, isPrepareGrabPos, isUseStackQueueCall;
 jboolean isGrabbing;
 BOOL virtualMouseEnabled;