Refactor NativeTouchHandler, restore absolute touch, Bug fixes

2024-06-16 15:48:55 +08:00
parent d673c4900c
commit e7fd911fb8
17 changed files with 463 additions and 282 deletions
@@ -0,0 +1,141 @@
+//
+//  NativeTouchPointer.m
+//  Moonlight
+//
+//  Created by ZWM on 2024/5/14.
+//  Copyright © 2024 Moonlight Game Streaming Project. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "NativeTouchPointer.h"
+#include <Limelight.h>
+
+// native touch pointer class deals with:
+// generating pointerId randomly, pointerId Dic & set management
+// pointer instance with coordinate manipulation.
+
+
+// Use a Dictionary to store UITouch object's memory address as key, and pointerId as value,字典存放UITouch对象地址和pointerId映射关系
+// pointerId will be generated from electronic noise, by arc4_random, pointerId,由随机噪声生成
+// Use a NSSet store pointerId, for quick repeition inquiry, NSSet存放活跃的pointerId合集,用于快速查找,以防重复.
+static NSMutableDictionary *pointerIdDict; //pointerId Dict for native touch.
+static NSMutableSet<NSNumber *> *pointerIdSet; //pointerIdSet for native touch.
+static NSMutableDictionary *pointerDict;
+
+static CGFloat pointerVelocityFactor;
+static CGFloat pointerVelocityDivider;
+static CGFloat pointerVelocityDividerLocation;
+
+StreamView *streamView;
+
+@implementation NativeTouchPointer{
+    CGPoint initialPoint;
+    CGPoint latestPoint;
+    CGPoint previousPoint;
+    CGPoint latestRelativePoint;
+    CGPoint previousRelativePoint;
+    CGFloat velocityX;
+    CGFloat velocityY;
+}
+
+ (void)setPointerVelocityDivider:(CGFloat)dividerLocation{
+    pointerVelocityDivider = dividerLocation;
+}
+
+ (void)setPointerVelocityFactor:(CGFloat)velocityFactor{
+    pointerVelocityFactor = velocityFactor;
+}
+
+
+- (instancetype)initWith:(UITouch *)touch{
+        self = [self init];
+        self->initialPoint = [touch locationInView:streamView];
+        self->latestPoint = self->initialPoint;
+        self->latestRelativePoint = self->initialPoint;
+        return self;
+    }
+
+- (void)updatePointerCoords:(UITouch *)touch{
+    previousPoint = latestPoint;
+    latestPoint = [touch locationInView:streamView];
+    velocityX = latestPoint.x - previousPoint.x;
+    velocityY = latestPoint.y - previousPoint.y;
+    previousRelativePoint = latestRelativePoint;
+    latestRelativePoint.x = previousRelativePoint.x + pointerVelocityFactor * velocityX;
+    latestRelativePoint.y = previousRelativePoint.y + pointerVelocityFactor * velocityY;
+}
+
+ (void)initContextWith:(StreamView *)view{
+    streamView = view;
+    pointerIdDict = [NSMutableDictionary dictionary];
+    pointerIdSet = [NSMutableSet set];
+    pointerDict = [NSMutableDictionary dictionary];
+    pointerVelocityDividerLocation = CGRectGetWidth([[UIScreen mainScreen] bounds]) * pointerVelocityDivider;
+    NSLog(@"pointerVelocityDivider:  %.2f", pointerVelocityDivider);
+    NSLog(@"pointerVelocityDividerLocation:  %.2f", pointerVelocityDividerLocation);
+}
+
+ (void)populatePointerObjIntoDict:(UITouch*)touch{
+    [pointerDict setObject:[[NativeTouchPointer alloc] initWith:touch] forKey:@((uint64_t)touch)];
+}
+
+ (void)removePointerObjFromDict:(UITouch*)touch{
+    uint64_t eventAddrValue = (uint64_t)touch;
+    NativeTouchPointer* pointer = [pointerDict objectForKey:@(eventAddrValue)];
+    if(pointer != nil){
+        [pointerDict removeObjectForKey:@(eventAddrValue)];
+    }
+
+}
+
+ (void)updatePointerObjInDict:(UITouch *)touch{
+    [[pointerDict objectForKey:@((uint64_t)touch)] updatePointerCoords:touch];
+}
+
+
+ (CGPoint)selectCoordsFor:(UITouch *)touch{
+    NativeTouchPointer *pointer = [pointerDict objectForKey:@((uint64_t)touch)];
+    if((pointer -> initialPoint).x > pointerVelocityDividerLocation){  //if first contact coords locates on the right side of divider.
+        return pointer->latestRelativePoint;
+    }
+    return [touch locationInView:streamView];
+}
+
+
+
+// 随机生成pointerId并填入NSDict和NSSet
+// generate & populate pointerId into NSDict & NSSet, called in UITouchPhaseBegan
+ (void)populatePointerId:(UITouch*)touch{
+    uint64_t eventAddrValue = (uint64_t)touch;
+    uint32_t randomPointerId = arc4random_uniform(UINT32_MAX); // generate pointerId from eletronic noise.
+    for(;;){
+        if([pointerIdSet containsObject:@(randomPointerId)]) randomPointerId = arc4random_uniform(UINT32_MAX); // in case of new pointerId collides with existing ones, generate again.
+        else{ // populate pointerId into NSDict & NSSet.
+            [pointerIdDict setObject:@(randomPointerId) forKey:@(eventAddrValue)];
+            [pointerIdSet addObject:@(randomPointerId)];
+            return;
+        }
+    }
+}
+
+
+
+// remove pointerId in UITouchPhaseEnded condition
+ (void)removePointerId:(UITouch*)touch{
+    uint64_t eventAddrValue = (uint64_t)touch;
+    NSNumber* pointerIdObj = [pointerIdDict objectForKey:@(eventAddrValue)];
+    if(pointerIdObj != nil){
+        [pointerIdSet removeObject:pointerIdObj];
+        [pointerIdDict removeObjectForKey:@(eventAddrValue)];
+    }
+}
+
+// 从字典中获取UITouch事件对应的pointerId
+// call this only when NSDcit & NSSet is up-to-date.
+ (uint32_t) retrievePointerIdFromDict:(UITouch*)touch{
+    return [[pointerIdDict objectForKey:@((uint64_t)touch)] unsignedIntValue];
+}
+
+
+
+@end