I'd like to know how to test behavior in Swift on Desktop that needs to interact with external elements, in my case the Finder.
My goal is simple: add an option in the right-click menu of the Finder that will open my application with the selected entry or entries (file or folder) from the Finder.
I have thus set the elements NSMenuItem, NSMessage, NSPortName, NSRequiredContext (NSApplicationIdentifier: com.apple.finder) etc.
I also created a class FinderService with a function performService having this declaration:
func performService(_ pboard: NSPasteboard, userData: String, error: AutoreleasingUnsafeMutablePointer<NSString>) {
NSLog("performService called!")
}
And I instantiated my class like this: NSApplication.shared.servicesProvider = FinderService().
However, when I build and launch the application nothing happens, well my application runs fine and the instantiation of the class seems to be correctly called. But when I open my Finder, my action is not displayed in the right-click context menu. And in the logs of my application, no error appears. How can I test this?
VincentHerl
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I would like to implement the same kind of behavior as the Dropoverapp application, specifically being able to perform a specific action when files are dragged (such as opening a window, for example).
I have written the code below to capture the mouse coordinates, drag, drop, and click globally. However, I don't know how to determine the nature of what is being dropped. Do you have any ideas on how to detect the nature of what is being dragged outside the application's scope?
Here is my current code:
import SwiftUI
import CoreGraphics
struct ContentView: View {
@State private var mouseX: CGFloat = 0.0
@State private var mouseY: CGFloat = 0.0
@State private var isClicked: Bool = false
@State private var isDragging: Bool = false
private var mouseTracker = MouseTracker.shared
var body: some View {
VStack {
Text("Mouse coordinates: \(mouseX, specifier: "%.2f"), \(mouseY, specifier: "%.2f")")
.padding()
Text(isClicked ? "Mouse is clicked" : "Mouse is not clicked")
.padding()
Text(isDragging ? "Mouse is dragging" : "Mouse is not dragging")
.padding()
}
.frame(width: 400, height: 200)
.onAppear {
mouseTracker.startTracking { newMouseX, newMouseY, newIsClicked, newIsDragging in
self.mouseX = newMouseX
self.mouseY = newMouseY
self.isClicked = newIsClicked
self.isDragging = newIsDragging
}
}
}
}
class MouseTracker {
static let shared = MouseTracker()
private var eventTap: CFMachPort?
private var runLoopSource: CFRunLoopSource?
private var isClicked: Bool = false
private var isDragging: Bool = false
private var callback: ((CGFloat, CGFloat, Bool, Bool) -> Void)?
func startTracking(callback: @escaping (CGFloat, CGFloat, Bool, Bool) -> Void) {
self.callback = callback
let mask: CGEventMask = (1 << CGEventType.mouseMoved.rawValue) |
(1 << CGEventType.leftMouseDown.rawValue) |
(1 << CGEventType.leftMouseUp.rawValue) |
(1 << CGEventType.leftMouseDragged.rawValue)
// Pass 'self' via 'userInfo'
let selfPointer = UnsafeMutableRawPointer(Unmanaged.passUnretained(self).toOpaque())
guard let eventTap = CGEvent.tapCreate(
tap: .cghidEventTap,
place: .headInsertEventTap,
options: .defaultTap,
eventsOfInterest: mask,
callback: MouseTracker.mouseEventCallback,
userInfo: selfPointer
) else {
print("Failed to create event tap")
return
}
self.eventTap = eventTap
runLoopSource = CFMachPortCreateRunLoopSource(kCFAllocatorDefault, eventTap, 0)
CFRunLoopAddSource(CFRunLoopGetCurrent(), runLoopSource, .commonModes)
CGEvent.tapEnable(tap: eventTap, enable: true)
}
// Static callback function
private static let mouseEventCallback: CGEventTapCallBack = { _, eventType, event, userInfo in
guard let userInfo = userInfo else {
return Unmanaged.passUnretained(event)
}
// Retrieve the instance of MouseTracker from userInfo
let tracker = Unmanaged<MouseTracker>.fromOpaque(userInfo).takeUnretainedValue()
let location = NSEvent.mouseLocation
// Update the click and drag state
switch eventType {
case .leftMouseDown:
tracker.isClicked = true
tracker.isDragging = false
case .leftMouseUp:
tracker.isClicked = false
tracker.isDragging = false
case .leftMouseDragged:
tracker.isDragging = true
default:
break
}
// Call the callback on the main thread
DispatchQueue.main.async {
tracker.callback?(location.x, location.y, tracker.isClicked, tracker.isDragging)
}
return Unmanaged.passUnretained(event)
}
}