Screen Record Permission Request Helper for macOS Catalina

ScreenRecordHelper.swift

        let stream = CGDisplayStream(display: CGDirectDisplayID(), outputWidth: 1, outputHeight: 1, pixelFormat: Int32(kCVPixelFormatType_32BGRA), properties: nil, handler: { (status, time, surface, update) in
            // do nothing
        })

ScreenshotHelper.swift

        let nemu = NSWorkspace().runningApplications.first { application -> Bool in
            return application.bundleIdentifier == "com.netease.nemu"
        }
        let windowInfoArray = CGWindowListCopyWindowInfo(.optionAll, kCGNullWindowID)! as NSArray
        let nemuWindowInfo = windowInfoArray.first { anyInfo -> Bool in
            guard let info = anyInfo as? NSDictionary else { return false }
            guard let pid = info[kCGWindowOwnerPID as NSString] as? NSNumber else { return false }
            return pid.int32Value == nemu?.processIdentifier
        } as? NSDictionary
        
        let image = nemuWindowInfo
            .flatMap { info -> CGWindowID? in
                (info[kCGWindowNumber as NSString] as? NSNumber)?.uint32Value
            }
            .flatMap { windowID -> CGImage? in
                CGWindowListCreateImage(.null, .optionIncludingWindow, windowID, [.boundsIgnoreFraming, .nominalResolution])
            }
            .flatMap { cgImage -> NSImage? in
                NSImage(cgImage: cgImage, size: .zero)
            }