76 lines
2.5 KiB
Objective-C
76 lines
2.5 KiB
Objective-C
//
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// NativeTouchHandler.m
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// Moonlight
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//
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// Created by ZWM on 2024/5/14.
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// Copyright © 2024 Moonlight Game Streaming Project. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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#import "NativeTouchHandler.h"
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#include <Limelight.h>
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// 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
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// pointerId will be generated from electronic noise, by arc4_random, pointerId,由随机噪声生成
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// 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.
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static NSMutableDictionary *pointerIdDict; //pointerId Dict for native touch.
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static NSMutableSet<NSNumber *> *pointerIdSet; //pointerIdSet for native touch.
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@implementation NativeTouchHandler {
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StreamView* view;
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}
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- (id)initWithView:(StreamView*)view {
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self = [self init];
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self->view = view;
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return self;
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}
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+ (NSMutableDictionary* )initializePointerIdDict {
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return pointerIdDict = [NSMutableDictionary dictionary];
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}
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+ (NSMutableSet* )initializePointerIdSet {
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return pointerIdSet = [NSMutableSet set];
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}
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// 随机生成pointerId并填入NSDict和NSSet
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// generate & populate pointerId into NSDict & NSSet, called in UITouchPhaseBegan
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+ (void)populatePointerId:(UITouch*)event{
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uint64_t eventAddrValue = (uint64_t)event;
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uint32_t randomPointerId = arc4random_uniform(UINT32_MAX); // generate pointerId from eletronic noise.
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while(true){
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if([pointerIdSet containsObject:@(randomPointerId)]) randomPointerId = arc4random_uniform(UINT32_MAX); // in case of new pointerId collides with existing ones, generate again.
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else{ // populate pointerId into NSDict & NSSet.
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[pointerIdDict setObject:@(randomPointerId) forKey:@(eventAddrValue)];
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[pointerIdSet addObject:@(randomPointerId)];
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return;
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}
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}
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}
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// remove pointerId in UITouchPhaseEnded condition
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+ (void)removePointerId:(UITouch*)event{
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uint64_t eventAddrValue = (uint64_t)event;
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NSNumber* pointerIdObj = [pointerIdDict objectForKey:@(eventAddrValue)];
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if(pointerIdObj != nil){
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[pointerIdSet removeObject:pointerIdObj];
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[pointerIdDict removeObjectForKey:@(eventAddrValue)];
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}
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}
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// 从字典中获取UITouch事件对应的pointerId
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// call this only when NSDcit & NSSet is up-to-date.
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+ (uint32_t) retrievePointerIdFromDict:(UITouch*)event{
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return [[pointerIdDict objectForKey:@((uint64_t)event)] unsignedIntValue];
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}
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@end
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