Native touch oriented improvements

Limelight/Input/CustomTapGestureRecognizer.m

@@ -0,0 +1,57 @@
+//
+//  CustomTapGestureRecognizer.m
+//  Moonlight
+//
+//  Created by ZWM on 2024/5/15.
+//  Copyright © 2024 Moonlight Game Streaming Project. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIGestureRecognizerSubclass.h>
+#import "CustomTapGestureRecognizer.h"
+
+@implementation CustomTapGestureRecognizer
+
+static NSTimeInterval multiFingerDownTime;
+static bool multiFingerDown;
+static CGFloat screenHeightInPoints;
+static CGFloat lowestTouchPointYCoord = 0.0;
+
+- (instancetype)initWithTarget:(nullable id)target action:(nullable SEL)action {
+    self = [super initWithTarget:target action:action];
+    screenHeightInPoints = CGRectGetHeight([[UIScreen mainScreen] bounds]);
+    return self;
+}
+
+- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
+    // Check if the number of touches and taps meets the required criteria
+    if ([[event allTouches] count] == _numberOfTouchesRequired) {
+        multiFingerDownTime = CACurrentMediaTime();
+        multiFingerDown = true;
+        
+        for(UITouch *touch in [event allTouches]){
+            if(lowestTouchPointYCoord < [touch locationInView:self.view].y) lowestTouchPointYCoord = [touch locationInView:self.view].y;
+        }
+        _lowestTouchPointHeight = screenHeightInPoints - lowestTouchPointYCoord;
+        self.state = UIGestureRecognizerStatePossible;
+    }
+}
+
+- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
+    // [super touchesEnded:touches withEvent:event];
+    if(multiFingerDown && [[event allTouches] count] == [touches count]){
+        multiFingerDown = false;
+        if((CACurrentMediaTime() - multiFingerDownTime) < _tapDownTimeThreshold / 1000){
+            lowestTouchPointYCoord = 0.0; //reset for next recognition
+            self.state = UIGestureRecognizerStateRecognized;
+        }
+    }
+}
+
++ (CGFloat)lowestTouchPointHeight{
+    @synchronized (self){
+        return self.lowestTouchPointHeight;
+    }
+}
+
+@end